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4,2&1C19 0 % / A.8 '(=,#%$
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4,$'??3 0 % / A.%8 ' 9,#%
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4.) & ** 0 / A..8 ' 9,# ,
4.) & %** 0 / A.28 ' 9,# ,
4. / 0 / A.48.$8,
4.% ) 7/! & 0 / A.8 ' 9,# ,
4., ) 7/! & 0 / A.(8 ' 9,#,
4.. ) 7/! & 0 / A.'8 ' 9,# ,
4.2 / 0 / A.38 ' 9,#,%
4.4" 0 / A.8 ' 9,# ,%
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W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 1 - Revision 1.0

GENERAL DESCRIPTION

The W83627HF and W83627F are evolving product from Winbond's most popular I/O family. They

feature a whole new interface, namely LPC (

Low Pin Count

) interface, which will be supported in the

next generation Intel chip-set. This interface as its name suggests is to provide an economical

implementation of I/O's interface with lower pin count and still maintains equivalent performance as its

ISA interface counterpart. Approximately 40 pin counts are saved in LPC I/O comparing to ISA

implementation. With this additional freedom, we can implement more devices on a single chip as

demonstrated in W83627F/HF's integration of Game Port and MIDI Port. It is fully transparent in terms of

software which means no BIOS or device driver update is needed except chip-specific configuration.
The disk drive adapter functions of W83627F/HF include a floppy disk drive controller compatible with the

industry standard 82077/ 765, data separator, write pre-compensation circuit, decode logic, data rate

selection, clock generator, drive interface control logic, and interrupt and DMA logic. The wide range of

functions integrated onto the W83627F/HF greatly reduces the number of components required for

interfacing with floppy disk drives. The W83627F/HF supports four 360K, 720K, 1.2M, 1.44M, or 2.88M

disk drives and data transfer rates of 250 Kb/s, 300 Kb/s, 500 Kb/s,1 Mb/s, and 2 Mb/s.
The W83627F/HF provides two high-speed serial communication ports (UARTs), one of which supports

serial Infrared communication. Each UART includes a 16-byte send/receive FIFO, a programmable

baud rate generator, complete modem control capability, and a processor interrupt system. Both

UARTs provide legacy speed with baud rate up to 115.2k bps and also advanced speed with baud rates

230k

460k

, or

921k bps

which support higher speed modems. In addition, the W83627F/HF provides

IR functions:

IrDA 1.0

(

SIR

for 1.152K bps) and TV remote IR (

Consumer IR

, supporting NEC, RC-5,

extended RC-5, and RECS-80 protocols).
The W83627F/HF supports one PC-compatible printer port (SPP), Bi-directional Printer port (BPP) and

also Enhanced Parallel Port (EPP) and Extended Capabilities Port (ECP). Through the printer port

interface pins, also available are: Extension FDD Mode and Extension 2FDD Mode allowing one or two

external floppy disk drives to be connected.
The configuration registers support mode selection, function enable/disable, and power down function

selection. Furthermore, the configurable PnP features are compatible with the plug-and-play feature

demand of Windows 95/98

, which makes system resource allocation more efficient than ever.

The W83627F/HF provides functions that complies with

ACPI

(

Advanced Configuration and Power

Interface

), which includes support of legacy and ACPI power management through

PME#

PSOUT#

function pins. For OnNow keyboard Wake-Up, OnNow mouse Wake-Up, and OnNow CIR Wake-Up.

The W83627F/HF also has auto power management to reduce the power consumption.
The keyboard controller is based on 8042 compatible instruction set with a 2K Byte programmable ROM

and a 256-Byte RAM bank. Keyboard BIOS firmware are available with optional AMIKEY

2, Phoenix

MultiKey/42

, or customer code.

The W83627F/HF provides a set of flexible I/O control functions to the system designer through a set of

General Purpose I/O ports. These GPIO ports may serve as simple I/O or may be individually configured

to provide a predefined alternate function. General Purpose Port 1 is designed to be functional even in

power down mode (VCC is off).

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 2 - Revision 1.0

The W83627F/HF is made to fully comply with

Microsoft PC98 and PC99 Hardware Design Guide

Moreover W83627F/HF is made to meet the specification of PC98/PC99's requirement in the power

management:

ACPI

and

DPM

(Device Power Management).

The W83627F/HF contains a game port and a MIDI port. The game port is designed to support 2

joysticks and can be applied to all standard PC game control devices, They are very important for a

entertainment or consumer computer.

Only the W83627HF support hardware status monitoring

for personal computers. It can be used to

monitor several critical hardware parameters of the system, including power supply voltages, fan speeds,

and temperatures, which are very important for a high-end computer system to work stably and properly.

FEATURES

General

�

Meet LPC Spec. 1.0

�

Support LDRQ#(LPC DMA), SERIRQ (serial IRQ)

�

Include all the features of Winbond I/O W83977TF and W83977EF

�

Integrate Hardware Monitor functions

�

Compliant with Microsoft PC98/PC99 Hardware Design Guide

�

Support DPM (Device Power Management), ACPI

�

Programmable configuration settings

�

Single 24 or 48 MHz clock input

FDC

�

Compatible with IBM PC AT disk drive systems

�

Variable write pre-compensation with track selectable capability

�

Support vertical recording format

�

DMA enable logic

�

16-byte data FIFOs

�

Support floppy disk drives and tape drives

�

Detects all overrun and underrun conditions

�

Built-in address mark detection circuit to simplify the read electronics

�

FDD anti-virus functions with software write protect and FDD write enable signal (write data

signal was forced to be inactive)

�

Support up to four 3.5-inch or 5.25-inch floppy disk drives

�

Completely compatible with industry standard 82077

�

360K/720K/1.2M/1.44M/2.88M format; 250K, 300K, 500K, 1M, 2M bps data transfer rate

�

Support

3-mode FDD, and its Win95/98 driver

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 3 - Revision 1.0

UART

�

Two high-speed 16550 compatible UARTs with 16-byte send/receive FIFOs

�

MIDI compatible

�

Fully programmable serial-interface characteristics:

--- 5, 6, 7 or 8-bit characters
--- Even, odd or no parity bit generation/detection
--- 1, 1.5 or 2 stop bits generation

�

Internal diagnostic capabilities:

--- Loop-back controls for communications link fault isolation
--- Break, parity, overrun, framing error simulation

�

Programmable baud generator allows division of 1.8461 MHz and 24 MHz by 1 to (2

-1)

�

Maximum baud rate up to

921k bps

for 14.769 MHz and 1.5M bps for 24 MHz

Infrared

�

Support IrDA version 1.0 SIR protocol with maximum baud rate up to 115.2K bps

�

Support SHARP ASK-IR protocol with maximum baud rate up to 57,600 bps

�

Support Consumer IR

Parallel Port

�

Compatible with IBM parallel port

�

Support PS/2 compatible bi-directional parallel port

�

Support Enhanced Parallel Port (EPP)

Compatible with IEEE 1284 specification

�

Support Extended Capabilities Port (ECP)

Compatible with IEEE 1284 specification

�

Extension FDD mode supports disk drive B; and Extension 2FDD mode supports disk drives A

and B through parallel port

�

Enhanced printer port back-drive current protection

Keyboard Controller

�

8042 based with optional F/W from AMIKKEY

-2, Phoenix MultiKey/42

or customer code

with 2K bytes of programmable ROM, and 256 bytes of RAM

�

Asynchronous Access to Two Data Registers and One status Register

�

Software compatibility with the 8042

�

Support PS/2 mouse

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 4 - Revision 1.0

�

Support port 92

�

Support both interrupt and polling modes

�

Fast Gate A20 and Hardware Keyboard Reset

�

8 Bit Timer/ Counter

�

Support binary and BCD arithmetic

�

6 MHz, 8 MHz, 12 MHz, or 16 MHz operating frequency

Game Port

�

Support two separate Joysticks

�

Support every Joystick two axis (X,Y) and two button (A,B) controllers

MIDI Port

�

The baud rate is 31.25 Kbaud

�

16-byte input FIFO

�

16-byte output FIFO

General Purpose I/O Ports

�

22 programmable general purpose I/O ports

�

General purpose I/O ports can serve as simple I/O ports, interrupt steering inputs, watch dog

timer output, power LED output, infrared I/O pins, KBC control I/O pins, suspend LED output,

RSMRST# signal, PWROK signal, Beep output

�

Functional in power down mode (GP1 only)

OnNow Functions

�

Keyboard Wake-Up by programmable keys

�

Mouse Wake-Up by programmable buttons

�

CIR Wake-Up by programmable keys

�

On Now Wake-Up from all of the ACPI sleeping states (S1-S5)

Hardware Monitor Functions ( Only for W83627HF)

�

5 VID input pins for CPU Vcore identification

�

3 thermal inputs from optionally remote thermistors or 2N3904 transistors or Pentium

(Deschutes) thermal diode output

�

7 positive voltage inputs (typical for +12V, -12V, +5V, -5V, +3.3V, VcoreA, VcoreB)

�

2 intrinsic voltage monitoring (typical for Vbat, +5VSB)

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 6 - Revision 1.0

PIN CONFIGURATION FOR 627F

1 2 3 4 5 6 7 8 9

KDAT

KCLK

VSB

KBRST

A20GATE

KBLOCK#

RIA#

DCDA#

VSS

SOUTA

SINA

DTRA#

RTSA#

DSRA#

CTSA#

VCC

STB#

AFD#

ERR#

INIT#

SLIN#

PD0

PD1

PD2

PD3

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

VCC

GPSA2/GP17

GPSB2/GP16

GPY1/GP15

GPY2/P16/GP14

GPX2/P15/GP13

GPX1/P14/GP12

GPSB1/P13/GP11

VSS

GPSA1/P12/GP10

SUSLED/GP35

W83627F

MSI/GP20

MSO/IRQIN0

NC
NC

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 7 - Revision 1.0

PIN CONFIGURATION FOR 627HF

1 2 3 4 5 6 7 8 9

KDAT

KCLK

VSB

KBRST

A20GATE

KBLOCK#

RIA#

DCDA#

VSS

SOUTA

SINA

DTRA#

RTSA#

DSRA#

CTSA#

VCC

STB#

AFD#

ERR#

INIT#

SLIN#

PD0

PD1

PD2

PD3

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

VTIN2

VTIN1

OVT#

VID4

VID3

VID2

VID1

VID0

VCC

GPSA2/GP17

GPSB2/GP16

GPY1/GP15

GPY2/P16/GP14

GPX2/P15/GP13

GPX1/P14/GP12

GPSB1/P13/GP11

VSS

GPSA1/P12/GP10

FANPWM1

FANPWM2

FANIO1

FANIO2

FANIO3

SUSLED/GP35

W83627HF

BEEP

MSI/GP20

MSO/IRQIN0

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 8 - Revision 1.0

1. PIN DESCRIPTION

Note: Please refer to Section 13.2 DC CHARACTERISTICS for details.
I/O8t

- TTL level bi-directional pin with 8 mA source-sink capability

I/O12t

- TTL level bi-directional pin with 12 mA source-sink capability

I/O12tp3

- 3.3V TTL level bi-directional pin with 12 mA source-sink capability

I/OD12t

- TTL level bi-directional pin open drain output with 12 mA sink capability

I/O24t

- TTL level bi-directional pin with 24 mA source-sink capability

OUT12t

- TTL level output pin with 12 mA source-sink capability

OUT12tp3 - 3.3V TTL level output pin with 12 mA source-sink capability
OD12

- Open-drain output pin with 12 mA sink capability

OD24

- Open-drain output pin with 24 mA sink capability

INcs

- CMOS level Schmitt-trigger input pin

INt

- TTL level input pin

INtd

- TTL level input pin with internal pull down resistor

INts

- TTL level Schmitt-trigger input pin

INtsp3

- 3.3V TTL level Schmitt-trigger input pin

1.1 LPC Interface

SYMBOL

PIN

I/O

FUNCTION

CLKIN

System clock input. According to the input frequency 24MHz or

48MHz, it is selectable through register. Default is 24MHz input.

PME#

Generated PME event.

PCICLK

tsp3

PCI clock input.

LDRQ#

12tp3

Encoded DMA Request signal.

SERIRQ

I/OD

12t

Serial IRQ input/Output.

LAD[3:0]

24-27 I/O

12tp3

These signal lines communicate address, control, and data

information over the LPC bus between a host and a peripheral.

LFRAME#

tsp3

Indicates start of a new cycle or termination of a broken cycle.

LRESET#

tsp3

Reset signal. It can connect to PCIRST# signal on the host.

SUSCLKIN

32khz clock input , for CIR only.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 9 - Revision 1.0

1.2 FDC Interface

SYMBOL

PIN

I/O

FUNCTION

DRVDEN0

Drive Density Select bit 0.

DRVDEN1

Drive Density Select bit 1. (Default)

SMI#
(IRQIN1)
GP27

I/OD

System Management Interrupt
(Interrupt channel input. For C version only)
General purpose I/O port 3 bit 6.

INDEX#

This Schmitt-triggered input from the disk drive is active low when

the head is positioned over the beginning of a track marked by an

index hole. This input pin is pulled up internally by a 1 K

resistor. The resistor can be disabled by bit 7 of L0-CRF0

(FIPURDWN).

MOA#

Motor A On. When set to 0, this pin enables disk drive 0. This

is an open drain output.

DSB#

Drive Select B. When set to 0, this pin enables disk drive B.

This is an open drain output.

DSA#

Drive Select A. When set to 0, this pin enables disk drive A.

This is an open drain output.

MOB#

Motor B On. When set to 0, this pin enables disk drive 1. This

is an open drain output.

DIR#

Direction of the head step motor. An open drain output.
Logic 1 = outward motion
Logic 0 = inward motion

STEP#

Step output pulses. This active low open drain output produces a

pulse to move the head to another track.

WD#

Write data. This logic low open drain writes pre-compensation

serial data to the selected FDD. An open drain output.

WE#

Write enable. An open drain output.

TRAK0#

Track 0. This Schmitt-triggered input from the disk drive is active

low when the head is positioned over the outermost track. This

input pin is pulled up internally by a 1 K

resistor. The resistor

can be disabled by bit 7 of L0-CRF0 (FIPURDWN).

WP#

Write protected. This active low Schmitt input from the disk drive

indicates that the diskette is write-protected. This input pin is

pulled up internally by a 1 K

resistor. The resistor can be

disabled by bit 7 of L0-CRF0 (FIPURDWN).

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 10 - Revision 1.0

1.2 FDC Interface, continued

SYMBOL

PIN

I/O

FUNCTION

RDATA#

The read data input signal from the FDD. This input pin is pulled

up internally by a 1 K

resistor. The resistor can be disabled by

bit 7 of L0-CRF0 (FIPURDWN).

HEAD#

Head select. This open drain output determines which disk drive

head is active.
Logic 1 = side 0
Logic 0 = side 1

DSKCHG#

Diskette change. This signal is active low at power on and

whenever the diskette is removed. This input pin is pulled up

internally by a 1 K

resistor. The resistor can be disabled by bit

7 of L0-CRF0 (FIPURDWN).

1.3 Multi-Mode Parallel Port

The following pins have alternate functions, which are controlled by CR28 and L3-CRF0.

SYMBOL

PIN

I/O

FUNCTION

SLCT

PRINTER MODE:
An active high input on this pin indicates that the printer is

selected. Refer to the description of the parallel port for definition

of this pin in ECP and EPP mode.

EXTENSION FDD MODE: WE2#
This pin is for Extension FDD B; its function is the same as the
WE# pin of FDC.

EXTENSION 2FDD MODE: WE2#
This pin is for Extension FDD A and B; its function is the same as

the WE# pin of FDC.

PRINTER MODE:
An active high input on this pin indicates that the printer has

detected the end of the paper. Refer to the description of the

parallel port for the definition of this pin in ECP and EPP mode.

EXTENSION FDD MODE: WD2#
This pin is for Extension FDD B; its function is the same as the
WD# pin of FDC.

EXTENSION 2FDD MODE: WD2#
This pin is for Extension FDD A and B; its function is the same as

the WD# pin of FDC.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 11 - Revision 1.0

1.3 Multi-Mode Parallel Port, continued

SYMBOL

PIN

I/O

FUNCTION

BUSY

PRINTER MODE:
An active high input indicates that the printer is not ready to

receive data. Refer to the description of the parallel port for

definition of this pin in ECP and EPP mode.

EXTENSION FDD MODE: MOB2#
This pin is for Extension FDD B; its function is the same as the

MOB# pin of FDC.

EXTENSION 2FDD MODE: MOB2#
This pin is for Extension FDD A and B; its function is the same as

the MOB# pin of FDC.

ACK#

PRINTER MODE: ACK#
An active low input on this pin indicates that the printer has

received data and is ready to accept more data. Refer to the

description of the parallel port for the definition of this pin in ECP

and EPP mode.
EXTENSION FDD MODE: DSB2#
This pin is for the Extension FDD B; its functions is the same as

the DSB# pin of FDC.
EXTENSION 2FDD MODE: DSB2#
This pin is for Extension FDD A and B; its function is the same as

the DSB# pin of FDC.

ERR#

PRINTER MODE: ERR#
An active low input on this pin indicates that the printer has

encountered an error condition. Refer to the description of the

parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: HEAD2#
This pin is for Extension FDD B; its function is the same as the

HEAD#pin of FDC.
EXTENSION 2FDD MODE: HEAD2#
This pin is for Extension FDD A and B; its function is the same as

the HEAD# pin of FDC.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 12 - Revision 1.0

1.3 Multi-Mode Parallel Port, continued

SYMBOL

PIN

I/O

FUNCTION

SLIN#

PRINTER MODE: SLIN#
Output line for detection of printer selection. Refer to the description

of the parallel port for the definition of this pin in ECP and EPP

mode.
EXTENSION FDD MODE: STEP2#
This pin is for Extension FDD B; its function is the same as the

STEP# pin of FDC.
EXTENSION 2FDD MODE: STEP2#
This pin is for Extension FDD A and B; its function is the same as

the STEP# pin of FDC.

INIT#

PRINTER MODE: INIT#
Output line for the printer initialization. Refer to the description of

the parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: DIR2#
This pin is for Extension FDD B; its function is the same as the

DIR# pin of FDC.
EXTENSION 2FDD MODE: DIR2#
This pin is for Extension FDD A and B; its function is the same as

the DIR# pin of FDC.

AFD#

PRINTER MODE: AFD#
An active low output from this pin causes the printer to auto feed a

line after a line is printed. Refer to the description of the parallel port

for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: DRVDEN0
This pin is for Extension FDD B; its function is the same as the

DRVDEN0 pin of FDC.
EXTENSION 2FDD MODE: DRVDEN0
This pin is for Extension FDD A and B; its function is the same as

the DRVDEN0 pin of FDC.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 13 - Revision 1.0

1.3 Multi-Mode Parallel Port, continued

SYMBOL

PIN

I/O

FUNCTION

STB#

PRINTER MODE: STB#
An active low output is used to latch the parallel data into the

printer. Refer to the description of the parallel port for the definition

of this pin in ECP and EPP mode.

EXTENSION FDD MODE: This pin is a tri-state output.

EXTENSION 2FDD MODE: This pin is a tri-state output.

PD0

I/O

12t

PRINTER MODE: PD0
Parallel port data bus bit 0. Refer to the description of the parallel

port for the definition of this pin in ECP and EPP mode.

EXTENSION FDD MODE: INDEX2#
This pin is for Extension FDD B; its function is the same as the

INDEX# pin of FDC. It is pulled high internally.

EXTENSION 2FDD MODE: INDEX2#
This pin is for Extension FDD A and B; its function is the same as

the INDEX# pin of FDC. It is pulled high internally.

PD1

I/O

12t

PRINTER MODE: PD1
Parallel port data bus bit 1. Refer to the description of the parallel

port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: TRAK02#
This pin is for Extension FDD B; its function is the same as the

TRAK0# pin of FDC. It is pulled high internally.
EXTENSION. 2FDD MODE: TRAK02#
This pin is for Extension FDD A and B; its function is the same as

the TRAK0# pin of FDC. It is pulled high internally.

PD2

I/O

12t

PRINTER MODE: PD2
Parallel port data bus bit 2. Refer to the description of the parallel

port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: WP2#
This pin is for Extension FDD B; its function is the same as the

WP# pin of FDC. It is pulled high internally.
EXTENSION. 2FDD MODE: WP2#
This pin is for Extension FDD A and B; its function is the same as

the WP# pin of FDC. It is pulled high internally.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 14 - Revision 1.0

1.3 Multi-Mode Parallel Port, continued

SYMBOL

PIN

I/O

FUNCTION

PD3

I/O

12t

PRINTER MODE: PD3
Parallel port data bus bit 3. Refer to the description of the parallel

port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: RDATA2#
This pin is for Extension FDD B; its function is the same as the

RDATA# pin of FDC. It is pulled high internally.
EXTENSION 2FDD MODE: RDATA2#
This pin is for Extension FDD A and B; its function is the same as

the RDATA# pin of FDC. It is pulled high internally.

PD4

I/O

12t

PRINTER MODE: PD4
Parallel port data bus bit 4. Refer to the description of the parallel

port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: DSKCHG2#
This pin is for Extension FDD B; the function of this pin is the same

as the DSKCHG# pin of FDC. It is pulled high internally.
EXTENSION 2FDD MODE: DSKCHG2#
This pin is for Extension FDD A and B; this function of this pin is

the same as the DSKCHG# pin of FDC. It is pulled high internally.

PD5

I/O

12t

-
-

PRINTER MODE: PD5
Parallel port data bus bit 5. Refer to the description of the

parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: This pin is a tri-state output.
EXTENSION 2FDD MODE: This pin is a tri-state output.

PD6

I/OD

12t

PRINTER MODE: PD6
Parallel port data bus bit 6. Refer to the description of the parallel

port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: This pin is a tri-state output.
EXTENSION. 2FDD MODE: MOA2#
This pin is for Extension FDD A; its function is the same as the

MOA# pin of FDC.

PD7

I/OD

12t

PRINTER MODE: PD7
Parallel port data bus bit 7. Refer to the description of the parallel

port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: This pin is a tri-state output.
EXTENSION 2FDD MODE: DSA2#
This pin is for Extension FDD A; its function is the same as the

DSA# pin of FDC.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 15 - Revision 1.0

1.4 Serial Port Interface

SYMBOL

PIN

I/O

FUNCTION

CTSA#
CTSB#

49
78

Clear To Send. It is the modem control input.
The function of these pins can be tested by reading bit 4 of the

handshake status register.

DSRA#
DSRB#

50
79

Data Set Ready. An active low signal indicates the modem or

data set is ready to establish a communication link and transfer

data to the UART.

RTSA#

I/O

UART A Request To Send. An active low signal informs the modem

or data set that the controller is ready to send data.

HEFRAS

During power-on reset, this pin is pulled down internally and is

defined as HEFRAS, which provides the power-on value for CR26 bit

6 (HEFRAS). A 4.7 k

is recommended if intends to pull up.

(select 4EH as configuration I/O port

s address)

RTSB#

I/O

UART B Request To Send. An active low signal informs the modem

or data set that the controller is ready to send data.

DTRA#

PNPCSV#

I/O

UART A Data Terminal Ready. An active low signal informs the

modem or data set that the controller is ready to communicate.
During power-on reset, this pin is pulled down internally and is

defined as PNPCSV#, which provides the power-on value for CR24

bit 0 (PNPCSV#). A 4.7 k

is recommended if intends to pull up.

(clear the default value of FDC, UARTs, PRT, Game port and MIDI

port)

DTRB#

I/O

UART B Data Terminal Ready. An active low signal informs the

modem or data set that controller is ready to communicate.

SINA

SINB

53
82

Serial Input. It is used to receive serial data through the

communication link.

SOUTA

I/O

UART A Serial Output. It is used to transmit serial data out to the

communication link.

PENKBC

During power-on reset, this pin is pulled down internally and is

defined as PENKBC, which provides the power-on value for CR24 bit

2 (ENKBC). A 4.7 k

resistor is recommended if intends to pull up.

(enable KBC)

SOUTB
PEN48

I/O

UART B Serial Output. During power-on reset, this pin is pulled

down internally and is defined as PEN48, which provides the power-

on value for CR24 bit 6 (EN48). A 4.7 k

resistor is

recommended if intends to pull up.

DCDA#
DCDB#

56
84

Data Carrier Detect. An active low signal indicates the modem or

data set has detected a data carrier.

RIA#
RIB#

57
85

Ring Indicator. An active low signal indicates that a ring signal is

being received from the modem or data set.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 16 - Revision 1.0

1.5 KBC Interface

SYMBOL

PIN

I/O

FUNCTION

KBLOCK#

Keyboard inhibit control input. This pin is after system reset.

Internal pull high. (KBC P17)

A20GATE

Gate A20 output. This pin is high after system reset. (KBC P21)

KBRST

Keyboard reset. This pin is high after system reset. (KBC P20)

KDATA

I/OD

Keyboard Data.

MDATA

I/OD

PS2 Mouse Data.

KCLK

I/OD

Keyboard Clock.

MCLK

I/OD

PS2 Mouse Clock.

1.6 ACPI Interface

SYMBOL

PIN

I/O

FUNCTION

VBAT

PWR

Battery voltage input.

PSOUT#

Panel Switch Output. This signal is used for Wake-Up system

from S5

cold

state. This pin is pulse output, active low.

PSIN

Panel Switch Input. This pin is high active with an internal pull

down resistor.

1.7 Hardware Monitor Interface

(For W83627HF only, all these pins in W83627F are NC.)

SYMBOL

PIN

I/O

FUNCTION

CASEOPEN#

CASE OPEN. An active low input from an external device when

case is opened. This signal can be latched if pin VBAT is

connect to battery, even W83627HF is power off.

-5VIN

AIN

0V to 4.096V FSR Analog Inputs.

-12VIN

AIN

0V to 4.096V FSR Analog Inputs.

+12VIN

AIN

0V to 4.096V FSR Analog Inputs.

+3.3VIN

AIN

0V to 4.096V FSR Analog Inputs.

VCOREB

AIN

0V to 4.096V FSR Analog Inputs.

VCOREA

100

AIN

0V to 4.096V FSR Analog Inputs.

VREF

101

AOUT

Reference Voltage for temperature measuration.

VTIN3

102

AIN

Temperature sensor 3 input. It is used for CPU2 temperature

measuration.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 17 - Revision 1.0

1.7 Hardware Monitor Interface, continued

SYMBOL

PIN

I/O

FUNCTION

VTIN2

103

AIN

Temperature sensor 2 input. It is used for CPU1 temperature

measuration.

VTIN1

104

AIN

Temperature sensor 1 input. It is used for system temperature

measuration.

OVT#

105

Over temperature Shutdown Output. It indicated the VTIN2 or

VTIN3 is over temperature limit.

VID[4:0]

106-

110

Voltage Supply readouts from Pentium II .

FANIO[3:1]

111-

113

I/O

12ts

0V to +5V amplitude fan tachometer input.

Alternate Function: Fan on-off control output.
These multifunctional pins can be programmable input or output.

FANPWM1
FANPWM2

116
115

Fan speed control. Use the Pulse Width Modulatuion (

PWM

)

technic knowledge to control the Fan's RPM.

BEEP

118

Beep function for hardware monitor. This pin is low after system

reset.

1.8 Game Port & MIDI Port

SYMBOL

PIN

I/O

FUNCTION

GPSA1
GP10

128

INcs

I/OD

Active-low, Joystick I switch input 1. (Default)
General purpose I/O port 1 bit 0.

P12

I/OD

Alternate Function Output:KBC P12 I/O port.

GPSB1
GP11

127

INcs

I/OD

Active-low, Joystick II switch input 1. (Default)
General purpose I/O port 1 bit 1.

P13

I/OD

Alternate Function Output:KBC P13 I/O port.

GPX1

GP12

126

I/OD

Joystick I timer pin. this pin connect to X positioning variable
resistors for the Josystick. (Default)
General purpose I/O port 1 bit 2.

P14

I/OD

Alternate Function Output:KBC P14 I/O port.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 18 - Revision 1.0

1.8

Game Port & MIDI Port, continued

SYMBOL

PIN

I/O

FUNCTION

GPX2

GP13

125

I/OD

Joystick II timer pin. this pin connect to X positioning variable
resistors for the Josystick. (Default)
General purpose I/O port 1 bit 3.

P15

I/OD

Alternate Function Output:KBC P15 I/O port.

GPY2

GP14

124

I/OD

Joystick II timer pin. this pin connect to Y positioning variable
resistors for the Josystick. (Default)
General purpose I/O port 1 bit 4.

P16

I/OD

Alternate Function Output:KBC P16 I/O port.

GPY1

123

I/OD

Joystick I timer pin. this pin connect to Y positioning variable

resistors for the Josystick. (Default)

GP15

I/OD

General purpose I/O port 1 bit 5.

GPSB2

122

INcs

Active-low, Joystick II switch input 2. This pin has an internal pull-
up resistor. (Default)

GP16

I/OD

General purpose I/O port 1 bit 6.

GPSA2

121

INcs

Active-low, Joystick I switch input 2. This pin has an internal pull-
up resistor. (Default)

GP17

I/OD

General purpose I/O port 1 bit 7.

MSI
GP20

119

INt

I/OD

12t

MIDI serial data input .(Default)
General purpose I/O port 2 bit 0.

MSO
IRQIN0

120

OUT

12t

MIDI serial data output. (Default)
Alternate Function input: Interrupt channel input.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 19 - Revision 1.0

1.9 General Purpose I/O Port

1.9.1 General Purpose I/O Port 1 (Power source is Vcc)

see 1.8 Game Port

1.9.2 General Purpose I/O Port 2 (Power source is Vcc)

SYMBOL

PIN

I/O

FUNCTION

GP20
MSI

119

I/OD

12t

INt

General purpose I/O port 2 bit 0.
MIDI serial data input. Schmitt trigger input with internal pull-up
register. (Default)

GP21
(SCL)

I/OD

12t

General purpose I/O port 2 bit 1.
(Alternate Function: Serial Bus Clock. For W83627HF Only)

GP22
(SDA)

I/OD

12t

I/OD

12ts

General purpose I/O port 2 bit 2.
(Alternate Function: Serial Bus bi-directional Data.
For W83627HF Only)

GP23
PLED

I/OD

24t

General purpose I/O port 2 bit 3.
Power LED output, this signal is low after system reset. (Default)

GP24

I/OD

12t

General purpose I/O port 2 bit 4.

WDTO

12t

Watch dog timer output. (Default)

GP25
IRRX

I/OD

12t

General purpose I/O port 2 bit 5.
Alternate Function Input: Infrared Receiver input. (Default)

GP26
IRTX

I/OD

12t

OUT

12t

General purpose I/O port 2 bit 6.
Alternate Function Output: Infrared Transmitter Output. (Default)

GP27
DRVDEN1
IRQIN1

I/OD

24t

General purpose I/O port 2 bit 7.
Drive Density Select bit 0. (Default)
Alternate Function Input: Interrupt channel input.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 20 - Revision 1.0

1.9.3 General Purpose I/O Port 3 (Power souce is VSB)

SYMBOL

PIN

I/O

FUNCTION

GP30

I/OD

12t

General purpose I/O port 3 bit 0.

SLP_SX#

Chpset suspend C status input.

GP31

I/OD

12t

General purpose I/O port 3 bit 1.

PWRCTL#

12t

This pin generates the PWRCTL# signal while the power failure.

(Default)

GP32

I/OD

12t

General purpose I/O port 3 bit 2.

PWROK

12t

This pin generates the PWROK signal while the VCC come in.

(Default)

GP33

I/OD

12t

General purpose I/O port 3 bit 3.

RSMRST#

12t

This pin generates the RSMRST signal while the VSB come in.

(Default)

GP34

I/OD

12t

General purpose I/O port 3 bit 4.

CIRRX#

12t

Consumer IR receiving input. This pin can Wake-Up system from

cold.

(Default)

GP35

I/OD

24t

General purpose I/O port 3 bit 5.

SUSLED

24t

Suspend LED output, it can program to flash when suspend state.

This function can work without VCC. (Default)

1.10 POWER PINS

SYMBOL

PIN

FUNCTION

VCC

12, 48, 77, 114

+5V power supply for the digital circuitry.

VSB

+5V stand-by power supply for the digital circuitry.

VCC3V

+3.3V power supply for driving 3V on host interface.

AVCC

Analog VCC input. Internally supplier to all analog circuitry.

AGND

Internally connected to all analog circuitry. The ground reference

for all analog inputs..

VSS

20, 55, 86, 117

Ground.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 21 - Revision 1.0

2. LPC (LOW PIN COUNT) INTERFACE

LPC interface is to replace ISA interface serving as a bus interface between host (chip-set) and

peripheral (Winbond I/O). Data transfer on the LPC bus are serialized over a 4 bit bus. The general

characteristics of the interface implemented in Winbond LPC I/O are:

�

One control line, namely LFRAME#, which is used by the host to start or stop transfers. No

peripherals drive this signal.

�

The LAD[3:0] bus, which communicates information serially. The information conveyed are cycle

type, cycle direction, chip selection, address, data, and wait states.

�

MR (master reset) of Winbond ISA I/O is replaced with a active low reset signal, namely LRESET#, in

Winbond LPC I/O.

�

An additional 33 MHz PCI clock is needed in Winbond LPC I/O for synchronization.

�

DMA requests are issued through LDRQ#.

�

Interrupt requests are issued through SERIRQ.

�

Power management events are issued through PME#.

Comparing to its ISA counterpart, LPC implementation saves up to 40 pin counts (see table below) free

for integrating more devices on a single chip.

Winbond I/O

Interface pins

count

W83977TF

D[7:0], SA[15:0], DRQ[3:0], DACK#[3:0], TC, IOR#, IOW#, IOCHRDY, IRQs

W83627HF

LAD[3:0], LFRAME#, PCICLK, LDRQ#, SERIRQ, PME#

save

The transition from ISA to LPC is transparent in terms of software which means no BIOS or device driver

update is needed except chip-specific configuration.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 22 - Revision 1.0

3. FDC FUNCTIONAL DESCRIPTION

3.1 W83627HF FDC

The floppy disk controller of the W83627HF integrates all of the logic required for floppy disk control.

The FDC implements a PC/AT or PS/2 solution. All programmable options default to compatible

values. The FIFO provides better system performance in multi-master systems. The digital data

separator supports up to 2 M bits/sec data rate.
The FDC includes the following blocks: AT interface, Precompensation, Data Rate Selection, Digital

Data Separator, FIFO, and FDC Core.

3.1.1 AT interface

The interface consists of the standard asynchronous signals: RD#, WR#, A0-A3, IRQ, DMA control, and

a data bus. The address lines select between the configuration registers, the FIFO and control/status

registers. This interface can be switched between PC/AT, Model 30, or PS/2 normal modes. The PS/2

3.1.2 FIFO (Data)

The FIFO is 16 bytes in size and has programmable threshold values. All command parameter

information and disk data transfers go through the FIFO. Data transfers are governed by the RQM and

DIO bits in the Main Status Register.
The FIFO defaults to disabled mode after any form of reset. This maintains PC/AT hardware

compatibility. The default values can be changed through the CONFIGURE command. The advantage of

the FIFO is that it allows the system a larger DMA latency without causing disk errors. The following

tables give several examples of the delays with a FIFO. The data are based upon the following formula:

THRESHOLD #

�

(1/DATA/RATE) *8 - 1.5

�

S = DELAY

FIFO THRESHOLD

MAXIMUM DELAY TO SERVICING AT 500K BPS

Data Rate

1 Byte

�

S - 1.5

�

S = 14.5

�

2 Byte

�

S - 1.5

�

S = 30.5

�

8 Byte

�

S - 1.5

�

S = 6.5

�

15 Byte

�

S - 1.5

�

S = 238.5

�

FIFO THRESHOLD

MAXIMUM DELAY TO SERVICING AT 1M BPS

Data Rate

1 Byte

�

S - 1.5

�

S = 6.5

�

2 Byte

�

S - 1.5

�

S = 14.5

�

8 Byte

�

S - 1.5

�

S = 62.5

�

15 Byte

�

S - 1.5

�

S = 118.5

�

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 23 - Revision 1.0

At the start of a command the FIFO is always disabled and command parameters must be sent based

upon the RQM and DIO bit settings in the main status register. When the FDC enters the command

execution phase, it clears the FIFO of any data to ensure that invalid data are not transferred.
An overrun and underrun will terminate the current command and the data transfer. Disk writes will

complete the current sector by generating a 00 pattern and valid CRC. Reads require the host to remove

the remaining data so that the result phase may be entered.
DMA transfers are enabled with the SPECIFY command and are initiated by the FDC by activating the

DRQ pin during a data transfer command. The FIFO is enabled directly by asserting DACK# and

addresses need not be valid.
Note that if the DMA controller is programmed to function in verify mode a pseudo read is performed by

the FDC based only on DACK#. This mode is only available when the FDC has been configured into byte

mode (FIFO disabled) and is programmed to do a read. With the FIFO enabled the above operation is

performed by using the new VERIFY command. No DMA operation is needed.�@

3.1.3 Data Separator

The function of the data separator is to lock onto the incoming serial read data. When a lock is achieved

the serial front end logic of the chip is provided with a clock which is synchronized to the read data. The

synchronized clock, called the Data Window, is used to internally sample the serial data portion of the

bit cell, and the alternate state samples the clock portion. Serial to parallel conversion logic separates

the read data into clock and data bytes.
The Digital Data Separator (DDS) has three parts: control logic, error adjustment, and speed tracking.

The DDS circuit cycles once every 12 clock cycles ideally. Any data pulse input will be synchronized

and then adjusted by immediate error adjustment. The control logic will generate RDD and RWD for

every pulse input. During any cycle where no data pulse is present, the DDS cycles are based on speed.

A digital integrator is used to keep track of the speed changes in the input data stream.

3.1.4 Write Precompensation

The write precompensation logic is used to minimize bit shifts in the RDDATA stream from the disk

drive. Shifting of bits is a known phenomenon in magnetic media and is dependent on the disk media

and the floppy drive.
The FDC monitors the bit stream that is being sent to the drive. The data patterns that require

precompensation are well known. Depending upon the pattern, the bit is shifted either early or late

relative to the surrounding bits.

3.1.5 Perpendicular Recording Mode

The FDC is also capable of interfacing directly to perpendicular recording floppy drives. Perpendicular

recording differs from the traditional longitudinal method in that the magnetic bits are oriented vertically.

This scheme packs more data bits into the same area.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 24 - Revision 1.0

FDCs with perpendicular recording drives can read standard 3.5" floppy disks and can read and write

perpendicular media. Some manufacturers offer drives that can read and write standard and

perpendicular media in a perpendicular media drive.
A single command puts the FDC into perpendicular mode. All other commands operate as they normally

do. The perpendicular mode requires a 1 Mbps data rate for the FDC. At this data rate the FIFO eases

the host interface bottleneck due to the speed of data transfer to or from the disk.

3.1.6 FDC Core

The W83627HF FDC is capable of performing twenty commands. Each command is initiated by a multi-

byte transfer from the microprocessor. The result can also be a multi-byte transfer back to the

microprocessor. Each command consists of three phases: command, execution, and result.
Command
The microprocessor issues all required information to the controller to perform a specific operation.
Execution
The controller performs the specified operation.
Result
After the operation is completed, status information and other housekeeping information is provided to

the microprocessor.

3.1.7 FDC Commands

Command Symbol Descriptions:
C:

Cylinder number 0 - 256

Data Pattern

DIR:

Step Direction

DIR = 0, step out

DIR = 1, step in

DS0:

Disk Drive Select 0

DS1:

Disk Drive Select 1

DTL:

Data Length

EC:

Enable Count

EOT:

End of Track

EFIFO:

Enable FIFO

EIS:

Enable Implied Seek

EOT:

End of track

FIFOTHR: FIFO Threshold
GAP:

Gap length selection

GPL:

Gap Length

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 25 - Revision 1.0

Head number

HDS:

Head number select

HLT:

Head Load Time

HUT:

Head Unload Time

LOCK:

Lock EFIFO, FIFOTHR, PTRTRK bits prevent affected by software reset

MFM:

MFM or FM Mode

MT:

Multitrack

The number of data bytes written in a sector

NCN:

New Cylinder Number

ND:

Non-DMA Mode

OW:

Overwritten

PCN:

Present Cylinder Number

POLL:

Polling Disable

PRETRK: Precompensation Start Track Number
R:

Record

RCN:

Relative Cylinder Number

R/W:

Read/Write

SC:

Sector/per cylinder

SK:

Skip deleted data address mark

SRT:

Step Rate Time

ST0:

Status Register 0

ST1:

Status Register 1

ST2:

Status Register 2

ST3:

Status Register 3

WG:

Write gate alters timing of WE

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 26 - Revision 1.0

(1) Read Data

PHASE

R/W

REMARKS

Command

MT MFM SK

Command codes

HDS DS1 DS0

W
W

-------------------------------- C ---------------------------------

--------------------------------- H ----------------------------------

Sector ID information prior

to command execution

W
W

-------------------------------- R ---------------------------------

-------------------------------- N --------------------------------

W
W

------------------------------- EOT -------------------------------

------------------------------ GPL ------------------------------

-------------------------------- DTL -------------------------------

Execution

Data transfer between the

FDD and system

Result

R
R

----------------------------- ST0 ----------------------------------
----------------------------- ST1 ----------------------------------
----------------------------- ST2 ----------------------------------

Status information after

command execution

R
R
R
R

-------------------------------- C -----------------------------------
-------------------------------- H -----------------------------------
-------------------------------- R -----------------------------------

--------------------------------- N -----------------------------------

Sector ID information after

command execution

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 27 - Revision 1.0

(2) Read Deleted Data

PHASE

R/W

REMARKS

Command

MT MFM

Command codes

HDS DS1 DS0

W
W

-------------------------------- C -------------------------------------
-------------------------------- H -------------------------------------

Sector ID information prior to

command execution

W
W

------------------------------- R ------------------------------------

-------------------------------- N -------------------------------------

W
W

------------------------------ EOT ----------------------------------
------------------------------ GPL ----------------------------------

W ------------------------------ DTL ----------------------------------

Execution

Data transfer between the

FDD and system

Result

R
R
R

------------------------- ST0 -----------------------------

-------------------------- ST1 -----------------------------

------------------------- ST2 ----------------------------

Status information after

command execution

R
R
R
R

---------------------------- C -------------------------------
---------------------------- H -------------------------------
---------------------------- R -------------------------------

--------------------------- N ------------------------------

Sector ID information after

command execution

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 28 - Revision 1.0

(3) Read A Track

PHASE

R/W

REMARKS

Command

MFM

Command codes

HDS DS1 DS0

W
W

------------------------------- C ---------------------------------

------------------------------ H --------------------------------

Sector ID information prior

to command execution

W
W

------------------------------- R ---------------------------------

-------------------------------- N ---------------------------------

W
W

----------------------------- EOT ------------------------------
----------------------------- GPL ------------------------------

----------------------------- DTL ------------------------------

Execution

Data transfer between the

FDD and system; FDD

reads contents of all

cylinders from index hole

to EOT

Result

R
R
R

------------------------------ ST0 ----------------------------------
------------------------------ ST1 ----------------------------------
------------------------------ ST2 ----------------------------------

Status information after

command execution

R
R
R
R

--------------------------------- C ------------------------------------

-------------------------------- H ------------------------------------

------------------------------- R -----------------------------------

-------------------------------- N ------------------------------------

Sector ID information after

command execution

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 29 - Revision 1.0

(4) Read ID

PHASE

R/W

REMARKS

Command

MFM

Command codes

HDS DS1 DS0

Execution

The first correct ID

information on the cylinder

is stored in Data Register

Result

R
R
R

------------------------------ ST0 ---------------------------------

------------------------------ ST1 --------------------------------

------------------------------ ST2 ---------------------------------

Status information after

command execution

R
R
R

-------------------------------- C ---------------------------------

--------------------------------- H ----------------------------------
--------------------------------- R ----------------------------------

-------------------------------- N ---------------------------------

Disk status after the

command has been

completed

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 30 - Revision 1.0

(5) Verify

PHASE

R/W

REMARKS

Command

MT MFM SK

Command codes

HDS DS1 DS0

W
W

----------------------------- C ---------------------------------

------------------------------ H ---------------------------------

Sector ID information prior

to command execution

W
W

----------------------------- R ---------------------------------

------------------------------ N ---------------------------------

W
W

---------------------------- EOT -------------------------------
---------------------------- GPL -------------------------------

--------------------------- DTL/SC ---------------------------

Execution

No data transfer takes

place

Result

R
R
R

---------------------------- ST0 ----------------------------------

---------------------------- ST1 ---------------------------------
---------------------------- ST2 ---------------------------------

Status information after

command execution

R
R
R
R

------------------------------ C ----------------------------------
------------------------------ H ----------------------------------

------------------------------ R -----------------------------------
------------------------------ N -----------------------------------

Sector ID information after

command execution

(6) Version

PHASE

R/W

REMARKS

Command

Command code

Result

Enhanced controller

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 31 - Revision 1.0

(7) Write Data

PHASE

R/W

REMARKS

Command

MT MFM

Command codes

HDS DS1 DS0

W
W

------------------------------ C ---------------------------------

------------------------------ H --------------------------------

Sector ID information prior

to Command execution

W
W

------------------------------ R --------------------------------

------------------------------- N --------------------------------

W
W

----------------------------- EOT -----------------------------

---------------------------- GPL -----------------------------

----------------------------- DTL ------------------------------

Execution

Data transfer between the

FDD and system

Result

R
R
R

----------------------------- ST0 -------------------------------
----------------------------- ST1 -------------------------------
----------------------------- ST2 -------------------------------

Status information after

Command execution

R
R
R
R

------------------------------ C ----------------------------------
------------------------------ H ----------------------------------
------------------------------ R ----------------------------------
------------------------------ N ----------------------------------

Sector ID information after

Command execution

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 32 - Revision 1.0

(8) Write Deleted Data

PHASE

R/W

REMARKS

Command

MFM

Command codes

HDS

DS1

DS0

W
W

-------------------------------- C ----------------------------------
-------------------------------- H ----------------------------------

W
W

--------------------------------- R ----------------------------------
--------------------------------- N ----------------------------------

Sector ID

information prior to

command

execution

W
W
W

------------------------------- EOT ------------------------------
------------------------------- GPL ------------------------------

-------------------------------- DTL -------------------------------

Execution

Data transfer

between the FDD

and system

Result

R
R
R

-------------------------------- ST0 --------------------------------

--------------------------------- ST1 --------------------------------
--------------------------------- ST2 --------------------------------

Status information

after command

execution

R
R
R
R

----------------------------------- C ----------------------------------
----------------------------------- H ----------------------------------
----------------------------------- R ----------------------------------
----------------------------------- N ----------------------------------

Sector ID

information after

command

execution

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 33 - Revision 1.0

(9) Format A Track

PHASE

R/W

REMARKS

Command

MFM

Command codes

HDS

DS1

DS0

W
W

---------------------------------- N --------------------------------------

---------------------------------- SC -------------------------------------

Bytes/Sector
Sectors/Cylinder

W
W

---------------------------------- GPL ------------------------------------

------------------------------------ D --------------------------------------

Gap 3
Filler Byte

Execution

for Each

Sector

Repeat:

W
W
W
W

------------------------------------ C --------------------------------------

------------------------------------- H ----------------------------------------
------------------------------------- R ----------------------------------------
------------------------------------- N ----------------------------------------

Input Sector

Parameters

Result

R
R
R

--------------------------------- ST0 -----------------------------------

----------------------------------- ST1 -------------------------------------

---------------------------------- ST2 ------------------------------------

Status information

after command

execution

R
R
R

-------------------------------- Undefined --------------------------------
-------------------------------- Undefined --------------------------------

--------------------------------- Undefined ---------------------------------

-------------------------------- Undefined --------------------------------

(10) Recalibrate

PHASE

R/W

REMARKS

Command

Command codes

DS1

DS0

Execution

Head retracted to

Track 0 Interrupt

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(11) Sense Interrupt Status

PHASE

R/W

REMARKS

Command

Command code

Result

R
R

------------------------------------ ST0 ---------------------------------------

--------------------------------- PCN ------------------------------------

Status information

at the end of each

seek operation

(12) Specify

PHASE

R/W

REMARKS

Command

Command codes

W
W

| ------------------SRT --------------------- | -------------- HUT ---------- |

|------------------------------------ HLT ------------------------------| ND

(13) Seek

PHASE

R/W

REMARKS

Command

Command codes

HDS

DS1

DS0

------------------------------------ NCN -------------------------------------

Execution

Head positioned

over proper cylinder

on diskette

(14) Configure

PHASE

R/W

REMARKS

Command

Configure information

0 EIS EFIFO POLL | -------------- FIFOTHR ---------------|

| -----------------------------------PRETRK -------------------------------- |

Execution

Internal registers

written

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(15) Relative Seek

PHASE

R/W

REMARKS

Command

DIR

Command codes

HDS

DS1

DS0

| ------------------------------------- RCN ----------------------------- |

(16) Dumpreg

PHASE

R/W

REMARKS

Command

Registers placed in

FIFO

Result

R
R
R
R
R
R
R

-------------------------------- PCN-Drive 0-------------------------------
-------------------------------- PCN-Drive 1 ------------------------------

------------------------------- PCN-Drive 2------------------------------

--------------------------------- PCN-Drive 3 -------------------------------

--------------SRT ----------------- | ---------------- HUT ---------------
-------------------- HLT --------------------------------------------| ND

-------------------------------- SC/EOT ----------------------------------

LOCK

GAP

R
R

0 EIS EFIFO POLL | ----------------- FIFOTHR ------------------

---------------------------------PRETRK -------------------------------------

(17) Perpendicular Mode

PHASE

R/W

REMARKS

Command

Command Code

GAP

(18) Lock

PHASE

R/W

REMARKS

Command

LOCK

Command Code

Result

LOCK

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3.2

Register Descriptions

There are several status, data, and control registers in W83627HF. These registers are defined below:

ADDRESS

REGISTER

OFFSET

READ

WRITE

base address + 0
base address + 1
base address + 2
base address + 3

SA REGISTER

SB REGISTER

TD REGISTER

DO REGISTER

TD REGISTER

base address + 4

MS REGISTER

DR REGISTER

base address + 5

DT (FIFO) REGISTER

base address + 7

DI REGISTER

CC REGISTER

3.2.1 Status Register A (SA Register) (Read base address + 0)

This register is used to monitor several disk interface pins in PS/2 and Model 30 modes. In PS/2 mode,

the bit definitions for this register are as follows:

INDEX

HEAD
TRAK0

STEP

DRV2

INIT PENDING

DIR

INIT PENDING (Bit 7):
This bit indicates the value of the floppy disk interrupt output.

DRV2# (Bit 6):

A second drive has been installed

A second drive has not been installed

STEP (Bit 5):
This bit indicates the complement of STEP# output.

TRAK0# (Bit 4):

This bit indicates the value of TRAK0# input.

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HEAD (Bit 3):
This bit indicates the complement of HEAD# output.
0

side 0

side 1

INDEX# (Bit 2):
This bit indicates the value of INDEX# output.

WP# (Bit 1):
0

disk is write-protected

disk is not write-protected

DIR (Bit 0)
This bit indicates the direction of head movement.
0

outward direction

inward direction

In PS/2 Model 30 mode, the bit definitions for this register are as follows:

INDEX

HEAD

TRAK0

STEP F/F

DRQ

INIT PENDING

DIR

INIT PENDING (Bit 7):
This bit indicates the value of the floppy disk interrupt output.

DRQ (Bit 6):
This bit indicates the value of DRQ output pin.
STEP F/F (Bit 5):
This bit indicates the complement of latched STEP# output.

TRAK0 (Bit 4):
This bit indicates the complement of TRAK0# input.

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HEAD# (Bit 3):
This bit indicates the value of HEAD# output.
0

side 1

side 0

INDEX (Bit 2):
This bit indicates the complement of INDEX# output.

WP (Bit 1):
0

disk is not write-protected

disk is write-protected

DIR# (Bit 0)
This bit indicates the direction of head movement.
0

inward direction

outward direction

3.2.2 Status Register B (SB Register) (Read base address + 1)

This register is used to monitor several disk interface pins in PS/2 and Model 30 modes. In PS/2 mode,

the bit definitions for this register are as follows:

MOT EN A

RDATA Toggle

WDATA Toggle

Drive SEL0

MOT EN B

Drive SEL0 (Bit 5):
This bit indicates the status of DO REGISTER bit 0 (drive select bit 0).

WDATA Toggle (Bit 4):
This bit changes state at every rising edge of the WD# output pin.
RDATA Toggle (Bit 3):
This bit changes state at every rising edge of the RDATA# output pin.
WE (Bit 2):
This bit indicates the complement of the WE# output pin.

MOT EN B (Bit 1)

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This bit indicates the complement of the MOB# output pin.

MOT EN A (Bit 0)
This bit indicates the complement of the MOA# output pin.
In PS/2 Model 30 mode, the bit definitions for this register are as follows:

DSC
DSD

WE F/F
RDATA F/F

DSA
DSB

DRV2

WD F/F

DRV2# (Bit 7):
0 A second drive has been installed
1 A second drive has not been installed

DSB# (Bit 6):
This bit indicates the status of DSB# output pin.

DSA# (Bit 5):
This bit indicates the status of DSA# output pin.

WD F/F(Bit 4):
This bit indicates the complement of the latched WD# output pin at every rising edge of the WD#

output pin.

RDATA F/F(Bit 3):
This bit indicates the complement of the latched RDATA# output pin .

WE F/F (Bit 2):
This bit indicates the complement of latched WE# output pin.
DSD# (Bit 1):
0 Drive D has been selected
1 Drive D has not been selected

DSC# (Bit 0):
0 Drive C has been selected
1 Drive C has not been selected

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3.2.3 Digital Output Register (DO Register) (Write base address + 2)

The Digital Output Register is a write-only register controlling drive motors, drive selection, DRQ/IRQ

enable, and FDC resetting. All the bits in this register are cleared by the MR pin. The bit definitions are

as follows:

1-0

Drive Select: 00 select drive A

01 select drive B

10 select drive C

11 select drive D

Floppy Disk Controller Reset

Active low resets FDC

DMA and INT Enable

Active high enable DRQ/IRQ

Motor Enable A. Motor A on when active high

Motor Enable B. Motor B on when active high

Motor Enable C. Motor C on when active high

Motor Enable D. Motor D on when active high

3.2.4 Tape Drive Register (TD Register) (Read base address + 3)

This register is used to assign a particular drive number to the tape drive support mode of the data

separator. This register also holds the media ID, drive type, and floppy boot drive information of the floppy

disk drive. In normal floppy mode, this register includes only bit 0 and 1. The bit definitions are as

follows:

Tape sel 0

Tape sel 1

If three mode FDD function is enabled (EN3MODE = 1 in CR9), the bit definitions are as follows:

Floppy boot drive 0
Floppy boot drive 1
Drive type ID0

Drive type ID1

Media ID0

Media ID1

Tape Sel 0

Tape Sel 1

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Media ID1 Media ID0 (Bit 7, 6):
These two bits are read only. These two bits reflect the value of CR8 bit 3, 2.

Drive type ID1 Drive type ID0 (Bit 5, 4):
These two bits reflect two of the bits of CR7. Which two bits are reflected depends on the last drive

selected in the DO REGISTER.

Floppy Boot drive 1, 0 (Bit 3, 2):
These two bits reflect the value of CR8 bit 1, 0.

Tape Sel 1, Tape Sel 0 (Bit 1, 0):
These two bits assign a logical drive number to the tape drive. Drive 0 is not available as a tape drive and

is reserved as the floppy disk boot drive.

TAPE SEL 1

TAPE SEL 0

DRIVE SELECTED

None

3.2.5 Main Status Register (MS Register) (Read base address + 4)

The Main Status Register is used to control the flow of data between the microprocessor and the

controller. The bit definitions for this register are as follows:

FDD 0 Busy, (D0B = 1), FDD number 0 is in the SEEK mode.
FDD 1 Busy, (D1B = 1), FDD number 1 is in the SEEK mode.

FDC Busy, (CB). A read or write command is in the process when CB = HIGH.

Non-DMA mode, the FDC is in the non-DMA mode, this bit is set only during the

execution phase in non-DMA mode.

Transition to LOW state indicates execution phase has ended.
DATA INPUT/OUTPUT, (DIO). If DIO= HIGH then transfer is from Data Register to the processor.
If DIO = LOW then transfer is from processor to Data Register.
Request for Master (RQM). A high on this bit indicates Data Register is ready to send or receive data to or from the processor.

FDD 2 Busy, (D2B = 1), FDD number 2 is in the SEEK mode.

FDD 3 Busy, (D3B = 1), FDD number 3 is in the SEEK mode.

3.2.6 Data Rate Register (DR Register) (Write base address + 4)

The Data Rate Register is used to set the transfer rate and write precompensation. The data rate of the

FDC is programmed by the CC REGISTER for PC-AT and PS/2 Model 30 and PS/2 mode, and not by

the DR REGISTER. The real data rate is determined by the most recent write to either of the DR

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DRATE0

DRATE1

PRECOMP0
PRECOMP1
PRECOMP2

POWER DOWN
S/W RESET

S/W RESET (Bit 7):
This bit is the software reset bit.

POWER-DOWN (Bit 6):
0 FDC in normal mode
1 FDC in power-down mode

PRECOMP2 PRECOMP1 PRECOMP0 (Bit 4, 3, 2):
These three bits select the value of write precompensation. The following tables show the

precompensation values for the combination of these bits.

PRECOMP

PRECOMPENSATION DELAY

2 1 0

250K - 1 Mbps

2 Mbps Tape drive

0 0 0

Default Delays

0 0 1

41.67 nS

20.8 nS

0 1 0

83.34 nS

41.17 nS

0 1 1

125.00 nS

62.5nS

1 0 0

166.67 nS

83.3 nS

1 0 1

208.33 nS

104.2 nS

1 1 0

250.00 nS

125.00 nS

1 1 1

0.00 nS (disabled)

DATA RATE

DEFAULT PRECOMPENSATION DELAYS

250 KB/S

125 nS

300 KB/S

125 nS

500 KB/S

125 nS

1 MB/S

41.67nS

2 MB/S

20.8 nS

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DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC and reduced write current control.

00 500 KB/S (MFM), 250 KB/S (FM), RWC = 1
01 300 KB/S (MFM), 150 KB/S (FM), RWC = 0
10 250 KB/S (MFM), 125 KB/S (FM), RWC = 0
11 1 MB/S (MFM), Illegal (FM), RWC = 1

The 2 MB/S data rate for Tape drive is only supported by setting 01 to DRATE1 and DRATE0 bits, as

well as setting 10 to DRT1 and DRT0 bits which are two of the Configure Register CRF4 or CRF5 bits in

logic device 0. Please refer to the function description of CRF4 or CRF5 and data rate table for individual

data rates setting.

3.2.7 FIFO Register (R/W base address + 5)

The Data Register consists of four status registers in a stack with only one register presented to the

data bus at a time. This register stores data, commands, and parameters and provides diskette-drive

status information. Data bytes are passed through the data register to program or obtain results after a

command. In the W83627HF, this register defaults to FIFO disabled mode after reset. The FIFO can

change its value and enable its operation through the CONFIGURE command.

Status Register 0 (ST0)

7-6

1-0

US1, US0 Drive Select:

00 Drive A selected

01 Drive B selected

10 Drive C selected

11 Drive D selected

HD Head address:

1 Head selected

0 Head selected

NR Not Ready:

1 Drive is not ready

0 Drive is ready

EC Equipment Check:

1 When a fault signal is received from the FDD or the track

0 signal fails to occur after 77 step pulses

0 No error

SE Seek end:

1 seek end

0 seek error

IC Interrupt Code:

00 Normal termination of command

01 Abnormal termination of command

10 Invalid command issue

11 Abnormal termination because the ready signal from FDD changed state during command execution

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Status Register 1 (ST1)

Missing Address Mark. 1 When the FDC cannot detect the data address mark

or the data address mark has been deleted.
NW (Not Writable). 1 If a write Protect signal is detected from the diskette drive during

execution of write data.
ND (No DATA). 1 If specified sector cannot be found during execution of a read, write or verifly data.
Not used. This bit is always 0.
OR (Over Rum). 1 If the FDC is not serviced by the host system within a certain time interval during data transfer.
DE (data Error).1 When the FDC detects a CRC error in either the ID field or the data field.

Not used. This bit is always 0.

EN (End of track). 1 When the FDC tries to access a sector beyond the final sector of a cylinder.

Status Register 2 (ST2)

BC (Bad Cylinder)

MD (Missing Address Mark in Data Field).

1 If the FDC cannot find a data address mark

(or the address mark has been deleted)

when reading data from the media

0 No error

1 Bad Cylinder

0 No error

SN (Scan Not satisfied)

1 During execution of the Scan command

0 No error

SH (Scan Equal Hit)

1 During execution of the Scan command, if the equal condition is satisfied

0 No error

WC (Wrong Cylinder)

1 Indicates wrong Cylinder

DD (Data error in the Data field)

1 If the FDC detects a CRC error in the data field

0 No error

CM (Control Mark)

1 During execution of the read data or scan command

0 No error

Not used. This bit is always 0

Status Register 3 (ST3)

US0 Unit Select 0

US1 Unit Select 1

HD Head Address

TS Two-Side

TO Track 0

RY Ready

WP Write Protected

FT Fault

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3.2.8 Digital Input Register (DI Register) (Read base address + 7)

The Digital Input Register is an 8-bit read-only register used for diagnostic purposes. In a PC/XT or AT

only Bit 7 is checked by the BIOS. When the register is read, Bit 7 shows the complement of
DSKCHG#

while other bits of the data bus remain in tri-state. Bit definitions are as follows:

Reserved for the hard disk controller

During a read of this register, these bits are in tri-state

DSKCHG

In the PS/2 mode, the bit definitions are as follows:

HIGH DENS
DRATE0

DRATE1

DSKCHG

DSKCHG (Bit 7):
This bit indicates the complement of the DSKCHG# input.

Bit 6-3: These bits are always a logic 1 during a read.

DRATE1 DRATE0 (Bit 2, 1):
These two bits select the data rate of the FDC. Refer to the DR register bits 1 and 0 for the settings

corresponding to the individual data rates.

HIGH DENS# (Bit 0):

0 500 KB/S or 1 MB/S data rate (high density FDD)

1 250 KB/S or 300 KB/S data rate

In the PS/2 Model 30 mode, the bit definitions are as follows:

DRATE0

DRATE1

DSKCHG

NOPREC
DMAEN

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DSKCHG (Bit 7):
This bit indicates the status of DSKCHG# input.

Bit 6-4: These bits are always a logic 1 during a read.

DMAEN (Bit 3):
This bit indicates the value of DO REGISTER bit 3.

NOPREC (Bit 2):
This bit indicates the value of CC REGISTER NOPREC bit.

DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC.

3.2.9 Configuration Control Register (CC Register) (Write base address + 7)

This register is used to control the data rate. In the PC/AT and PS/2 mode, the bit definitions are as

follows:

DRATE0
DRATE1

X: Reserved

Bit 7-2: Reserved. These bits should be set to 0.

DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC.
In the PS/2 Model 30 mode, the bit definitions are as follows:

DRATE0

DRATE1

NOPREC

Reserved

Bit 7-3: Reserved. These bits should be set to 0.

NOPREC (Bit 2):
This bit indicates no precompensation. It has no function and can be set by software.

DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC.

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UART PORT

4.1

Universal Asynchronous Receiver/Transmitter (UART A, UART B)

The UARTs are used to convert parallel data into serial format on the transmit side and convert serial

data to parallel format on the receiver side. The serial format, in order of transmission and reception, is a

start bit, followed by five to eight data bits, a parity bit (if programmed) and one, one and half (five-bit

format only) or two stop bits. The UARTs are capable of handling divisors of 1 to 65535 and producing a

16x clock for driving the internal transmitter logic. Provisions are also included to use this 16x clock to

drive the receiver logic. The UARTs also support the MIDI data rate. Furthermore, the UARTs also

include complete modem control capability and a processor interrupt system that may be software

trailed to the computing time required to handle the communication link. The UARTs have a FIFO mode

to reduce the number of interrupts presented to the CPU. In each UART, there are 16-byte FIFOs for

both receive and transmit mode.

4.2

Register Address

4.2.1 UART Control Register (UCR) (Read/Write)

The UART

Control Register controls and defines the protocol for asynchronous data communications,

including data length, stop bit, parity, and baud rate selection.

Data length select bit 0 (DLS0)
Data length select bit 1(DLS1)
Multiple stop bits enable (MSBE)
Parity bit enable (PBE)
Even parity enable (EPE)

Parity bit fixed enable (PBFE)
Set silence enable (SSE)
Baudrate divisor latch access bit (BDLAB)

Bit 7: BDLAB. When this bit is set to a logical 1, designers can access the divisor (in 16-bit binary

format) from the divisor latches of the baudrate generator during a read or write operation. When

this bit is reset, the Receiver Buffer Register, the Transmitter Buffer Register, or the Interrupt

Control Register can be accessed.

Bit 6: SSE. A logical 1 forces the Serial Output (SOUT) to a silent state (a logical 0). Only IRTX is

affected by this bit; the transmitter is not affected.

Bit 5: PBFE. When PBE and PBFE of UCR are both set to a logical 1,

(1) if EPE is logical 1, the parity bit is fixed as logical 0 to transmit and check.
(2) if EPE is logical 0, the parity bit is fixed as logical 1 to transmit and check.

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TABLE 4-1 UART Register Bit Map

Bit Number

Register Address Base

+ 0

BDLAB = 0

Receiver

Buffer

(Read Only)

RBR

RX Data

Bit 0

RX Data

Bit 1

RX Data

Bit 2

RX Data

Bit 3

RX Data

Bit 4

RX Data

Bit 5

RX Data

Bit 6

RX Data

Bit 7

+ 0

BDLAB = 0

Transmitter

Buffer Register

(Write Only)

TBR

TX Data

Bit 0

TX Data

Bit 1

TX Data

Bit 2

TX Data

Bit 3

TX Data

Bit 4

TX Data

Bit 5

TX Data

Bit 6

TX Data

Bit 7

+ 1

BDLAB = 0

Interrupt Control

ICR

RBR Data

Ready

Interrupt

Enable

(ERDRI)

TBR

Empty

Interrupt

Enable

(ETBREI)

USR

Interrupt

Enable

(EUSRI)

HSR

Interrupt

Enable

(EHSRI)

+ 2

Interrupt Status

(Read Only)

ISR

"0" if

Interrupt

Pending

Interrupt

Status

Bit (0)

Interrupt

Status

Bit (1)

Interrupt

Status

Bit (2)**

FIFOs

Enabled

FIFOs

Enabled

+ 2

UART FIFO

Control

(Write Only)

UFR

FIFO

Enable

RCVR

FIFO

Reset

XMIT

FIFO

Reset

DMA

Mode

Select

Reserved

Reversed

Interrupt

Active Level

(LSB)

Interrupt

Active Level

(MSB)

+ 3

UART Control

UCR

Data

Length

Select

Bit 0

(DLS0)

Data

Length

Select

Bit 1

(DLS1)

Multiple

Stop Bits

Enable

(MSBE)

Parity

Bit

Enable

(PBE)

Even

Parity

Enable

(EPE)

Parity

Bit Fixed

Enable

PBFE)

Set

Silence

Enable

(SSE)

Baudrate

Divisor

Latch

Access Bit

(BDLAB)

+ 4

Handshake

Control

HCR

Data

Terminal

Ready

(DTR)

Request

Send

(RTS)

Loopback

Input

IRQ

Enable

Internal

Loopback

Enable

+ 5

UART Status

USR

RBR Data

Ready

(RDR)

Overrun

Error

(OER)

Parity Bit

Error

(PBER)

No Stop

Bit

Error

(NSER)

Silent

Byte

Detected

(SBD)

TBR

Empty

(TBRE)

TSR

Empty

(TSRE)

RX FIFO

Error

Indication

(RFEI) **

+ 6

Handshake

Status Register

HSR

CTS

Toggling

(TCTS)

DSR

Toggling

(TDSR)

RI Falling

Edge

(FERI)

DCD

Toggling

(TDCD)

Clear

to Send

(CTS)

Data Set

Ready

(DSR)

Ring

Indicator

(RI)

Data Carrier

Detect

(DCD)

+ 7

User Defined

UDR

Bit 0

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

+ 0

BDLAB = 1

Baudrate

Divisor Latch

Low

BLL

Bit 0

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

+ 1

BDLAB = 1

Baudrate

Divisor Latch

High

BHL

Bit 8

Bit 9

Bit 10

Bit 11

Bit 12

Bit 13

Bit 14

Bit 15

*: Bit 0 is the least significant bit. The least significant bit is the first bit serially transmitted or received.
**: These bits are always 0 in 16450 Mode.

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Bit 4: EPE. This bit describes the number of logic 1's in the data word bits and parity bit only when bit 3

is programmed. When this bit is set, an even number of logic 1's are sent or checked. When the

bit is reset, an odd number of logic 1's are sent or checked.

Bit 3: PBE. When this bit is set, the position between the last data bit and the stop bit of the SOUT will

be stuffed with the parity bit at the transmitter. For the receiver, the parity bit in the same position

as the transmitter will be detected.

Bit 2: MSBE. This bit defines the number of stop bits in each serial character that is transmitted or

received.
(1) If MSBE is set to a logical 0, one stop bit is sent and checked.
(2) If MSBE is set to a logical 1, and data length is 5 bits, one and a half stop bits are sent and

checked.

(3) If MSBE is set to a logical 1, and data length is 6, 7, or 8 bits, two stop bits are sent and

checked.

Bits 0 and 1: DLS0, DLS1. These two bits define the number of data bits that are sent or checked in

each serial character.

TABLE 4-2 WORD LENGTH DEFINITION

DLS1

DLS0

DATA LENGTH

5 bits

6 bits

7 bits

8 bits

4.2.2 UART Status Register (USR) (Read/Write)

This 8-bit register provides information about the status of the data transfer during communication.

RBR Data ready (RDR)

Overrun error (OER)

Parity bit error (PBER)
No stop bit error (NSER)
Silent byte detected (SBD)

Transmitter Buffer Register empty (TBRE)
Transmitter Shift Register empty (TSRE)

RX FIFO Error Indication (RFEI)

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Bit 7: RFEI. In 16450 mode, this bit is always set to a logic 0. In 16550 mode, this bit is set to a logic 1

when there is at least one parity bit error, no stop bit error or silent byte detected in the FIFO. In

16550 mode, this bit is cleared by reading from the USR if there are no remaining errors left in the

FIFO.

Bit 6: TSRE. In 16450 mode, when TBR and TSR are both empty, this bit will be set to a logical 1. In

16550 mode, if the transmit FIFO and TSR are both empty, it will be set to a logical 1. Other

thanthese two cases, this bit will be reset to a logical 0.

Bit 5: TBRE. In 16450 mode, when a data character is transferred from TBR to TSR, this bit will be set to

a logical 1. If ETREI of ICR is a logical 1, an interrupt will be generated to notify the CPU to write

the next data. In 16550 mode, this bit will be set to a logical 1 when the transmit FIFO is empty. It

will be reset to a logical 0 when the CPU writes data into TBR or FIFO.

Bit 4: SBD. This bit is set to a logical 1 to indicate that received data are kept in silent state for a full

word time, including start bit, data bits, parity bit, and stop bits. In 16550 mode, it indicates the

same condition for the data on top of the FIFO. When the CPU reads USR, it will clear this bit to a

logical 0.

Bit 3: NSER. This bit is set to a logical 1 to indicate that the received data have no stop bit. In 16550

mode, it indicates the same condition for the data on top of the FIFO. When the CPU reads USR,

it will clear this bit to a logical 0.

Bit 2: PBER. This bit is set to a logical 1 to indicate that the parity bit of received data is wrong. In 16550

mode, it indicates the same condition for the data on top of the FIFO. When the CPU reads USR,

it will clear this bit to a logical 0.

Bit 1: OER. This bit is set to a logical 1 to indicate received data have been overwritten by the next

received data before they were read by the CPU. In 16550 mode, it indicates the same condition

instead of FIFO full. When the CPU reads USR, it will clear this bit to a logical 0.

Bit 0: RDR. This bit is set to a logical 1 to indicate received data are ready to be read by the CPU in the

RBR or FIFO. After no data are left in the RBR or FIFO, the bit will be reset to a logical 0.

4.2.3 Handshake Control Register (HCR) (Read/Write)

This register controls the pins of the UART used for handshaking peripherals such as modem, and

controls the diagnostic mode of the UART.

Data terminal ready (DTR)
Request to send (RTS)
Loopback RI input
IRQ enable

Internal loopback enable

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Bit 4: When this bit is set to a logical 1, the UART enters diagnostic mode by an internal loopback, as

follows:

(1) SOUT is forced to logical 1, and SIN is isolated from the communication link instead of the

TSR.

(2) Modem output pins are set to their inactive state.

(3) Modem input pins are isolated from the communication link and connect internally as DTR

(bit 0 of HCR)

DSR, RTS ( bit 1 of HCR)

CTS , Loopback RI input ( bit 2 of HCR)

RI and IRQ enable ( bit 3 of HCR)

DCD .

Aside from the above connections, the UART operates normally. This method allows the CPU

to test the UART in a convenient way.

Bit 3: The UART interrupt output is enabled by setting this bit to a logic 1. In the diagnostic mode this bit

is internally connected to the modem control input DCD .

Bit 2: This bit is used only in the diagnostic mode. In the diagnostic mode this bit is internally

connected to the modem control input RI .

Bit 1: This bit controls the RTS output. The value of this bit is inverted and output to RTS .
Bit 0: This bit controls the DTR output. The value of this bit is inverted and output to DTR .

4.2.4 Handshake Status Register (HSR) (Read/Write)

This register reflects the current state of four input pins for handshake peripherals such as a modem and

records changes on these pins.

RI falling edge (FERI)

Clear to send (CTS)

Data set ready (DSR)
Ring indicator (RI)
Data carrier detect (DCD)

CTS toggling (TCTS)

DSR toggling (TDSR)

DCD toggling (TDCD)

Bit 7: This bit is the opposite of the DCD input. This bit is equivalent to bit 3 of HCR in loopback mode.

Bit 6: This bit is the opposite of the RI input. This bit is equivalent to bit 2 of HCR in loopback mode.
Bit 5: This bit is the opposite of the DSR input. This bit is equivalent to bit 0 of HCR in loopback mode.
Bit 4: This bit is the opposite of the CTS input. This bit is equivalent to bit 1 of HCR in loopback mode.

Bit 3: TDCD. This bit indicates that the DCD pin has changed state after HSR was read by the

CPU.

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Bit 2: FERI. This bit indicates that the RI pin has changed from low to high state after HSR was read

by the CPU.

Bit 1: TDSR. This bit indicates that the DSR pin has changed state after HSR was read by the CPU.
Bit 0: TCTS. This bit indicates that the CTS pin has changed state after HSR was read.

4.2.5 UART FIFO Control Register (UFR) (Write only)

This register is used to control the FIFO functions of the UART.

FIFO enable

Receiver FIFO reset

Transmitter FIFO reset

DMA mode select

Reserved

RX interrupt active level (LSB)

RX interrupt active level (MSB)

Bit 6, 7: These two bits are used to set the active level for the receiver FIFO interrupt. For example, if the

interrupt active level is set as 4 bytes, once there are more than 4 data characters in the receiver

FIFO, the interrupt will be activated to notify the CPU to read the data from the FIFO.

TABLE 4-3 FIFO TRIGGER LEVEL

BIT 7

BIT 6

RX FIFO INTERRUPT ACTIVE LEVEL (BYTES)

Bit 4, 5: Reserved

Bit 3: When this bit is programmed to logic 1, the DMA mode will change from mode 0 to mode 1 if

UFR bit 0 = 1.

Bit 2: Setting this bit to a logical 1 resets the TX FIFO counter logic to initial state. This bit will clear to a

logical 0 by itself after being set to a logical 1.

Bit 1: Setting this bit to a logical 1 resets the RX FIFO counter logic to initial state. This bit will clear to a

logical 0 by itself after being set to a logical 1.

Bit 0: This bit enables the 16550 (FIFO) mode of the UART. This bit should be set to a logical 1 before

other bits of UFR are programmed.

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4.2.6 Interrupt Status Register (ISR) (Read only)

This register reflects the UART interrupt status, which is encoded by different interrupt sources into 3

bits.

0 if interrupt pending
Interrupt Status bit 0

Interrupt Status bit 1

Interrupt Status bit 2

FIFOs enabled

Bit 7, 6: These two bits are set to a logical 1 when UFR bit 0 = 1.
Bit 5, 4: These two bits are always logic 0.
Bit 3: In 16450 mode, this bit is 0. In 16550 mode, both bit 3 and 2 are set to a logical 1 when a time-out

interrupt is pending.

Bit 2, 1: These two bits identify the priority level of the pending interrupt, as shown in the table below.
Bit 0: This bit is a logical 1 if there is no interrupt pending. If one of the interrupt sources has occurred,

this bit will be set to a logical 0.

TABLE 4-4 INTERRUPT CONTROL FUNCTION

ISR

INTERRUPT SET AND FUNCTION

Bit

Interrupt
priority

Interrupt Type

Interrupt Source

Clear Interrupt

No Interrupt pending

First

UART Receive
Status

1. OER = 1 2. PBER =1
3. NSER = 1 4. SBD = 1

Read USR

Second

RBR Data Ready

1. RBR data ready
2. FIFO interrupt active level
reached

1. Read RBR
2. Read RBR until FIFO
data under active level

Second

FIFO Data Timeout

Data present in RX FIFO for 4
characters period of time since
last access of RX FIFO.

Read RBR

Third

TBR Empty

TBR empty

1. Write data into TBR
2. Read ISR (if priority is
third)

Fourth

Handshake status

1. TCTS = 1 2. TDSR = 1
3. FERI = 1 4. TDCD = 1

Read HSR

** Bit 3 of ISR is enabled when bit 0 of UFR is logical 1.

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4.2.7 Interrupt Control Register (ICR) (Read/Write)

This 8-bit register allows the five types of controller interrupts to activate the interrupt output signal

separately. The interrupt system can be totally disabled by resetting bits 0 through 3 of the Interrupt

Control Register (ICR). A selected interrupt can be enabled by setting the appropriate bits of this

RBR data ready interrupt enable (ERDRI)

TBR empty interrupt enable (ETBREI)
UART receive status interrupt enable (EUSRI)

Handshake status interrupt enable (EHSRI)

Bit 7-4: These four bits are always logic 0.
Bit 3: EHSRI. Setting this bit to a logical 1 enables the handshake status register interrupt.
Bit 2: EUSRI. Setting this bit to a logical 1 enables the UART status register interrupt.
Bit 1: ETBREI. Setting this bit to a logical 1 enables the TBR empty interrupt.
Bit 0: ERDRI. Setting this bit to a logical 1 enables the RBR data ready interrupt.

4.2.8 Programmable Baud Generator (BLL/BHL) (Read/Write)

Two 8-bit registers, BLL and BHL, compose a programmable baud generator that uses 24 MHz to

generate a 1.8461 MHz frequency and divides it by a divisor from 1 to 2

-1. The output frequency of the

baud generator is the baud rate multiplied by 16, and this is the base frequency for the transmitter and

receiver. The table in the next page illustrates the use of the baud generator with a frequency of 1.8461

MHz. In high-speed UART mode (refer to CR0C bit7 and CR0C bit6), the programmable baud generator

directly uses 24 MHz and the same divisor as the normal speed divisor. In high-speed mode, the data

transmission rate can be as high as 1.5M bps.

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4.2.9 User-defined Register (UDR) (Read/Write)

This is a temporary register that can be accessed and defined by the user.
TABLE 4-5 BAUD RATE TABLE

BAUD RATE FROM DIFFERENT PRE-DIVIDER

Pre-Div: 13

1.8461M Hz

Pre-Div:1.625

14.769M Hz

Pre-Div: 1.0

24M Hz

Decimal divisor used

to generate 16X clock

Error Percentage between

desired and actual

400

650

2304

600

975

1536

110

880

1430

1047

0.18%

134.5

1076

1478.5

857

0.099%

150

1200

1950

768

300

2400

3900

384

600

4800

7800

192

1200

9600

15600

1800

14400

23400

2000

16000

26000

0.53%

2400

19200

31200

3600

28800

46800

4800

38400

62400

7200

57600

93600

9600

76800

124800

19200

153600

249600

38400

307200

499200

57600

460800

748800

115200

921600

1497600

** The percentage error for all baud rates, except where indicated otherwise, is 0.16%.
Note. Pre-Divisor is determined by CRF0 of UART A and B.

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5. CIR RECEIVER PORT

5.1 CIR Registers

5.1.1 Bank0.Reg0 - Receiver Buffer Registers (RBR) (Read)

Receiver Buffer Register is read only. When the CIR pulse train has been detected and passed by the

internal signal filter, the data samped and shifted into shifter register will write into Receiver Buffer

5.1.2 Bank0.Reg1 - Interrupt Control Register (ICR)

Power on default <7:0> = 00000000 binary

Bit

Name

Read/Write

Description

EN_GLBI

Read/Write Enable Global Interrupt. Write 1, enable interrupt. Write 0,

disable global interrupt.

6-3

Reserved

EN_TMR_I

Read/Write Enable Timer Interrupt.

En_LSR_I

Read/Write Enable Line-Status-Register interrupt.

EN_RX_I

Read/Write Receiver Thershold-Level Interrupt Enable.

5.1.3 Bank0.Reg2 - Interrupt Status Register (ISR)

Power on default <7:0> = 00000000 binary

Bit

Name

Read/Write

Description

7-3

Reserved

TMR_I

Read Only

Timer Interrupt. Set to 1 when timer count to 0. This bit will

be affected by (1) the timer registers are defined in

Bank4.Reg0 and Bank1.Reg0~1, (2) EN_TMR(Enable

Timer, in Bank0.Reg3.Bit2) should be set to 1, (3)

ENTMR_I (Enable Timer Interrupt, in Bank0.Reg1.Bit2)

should be set to 1.

LSR_I

Read Only

Line-Status-Register interrupt. Set to 1 when overrun, or

parity bit, or stop bit, or silent byte detected error in the

Line Status Register (LSR) sets to 1. Clear to 0 when LSR

is read.

RXTH_I

Read Only

Receiver Thershold-Level Interrupt. Set to 1 when (1) the

Receiver Buffer Register (RBR) is equal

larger than the

threshold level, (2) RBR occurs time-out if the receiver

buffer register has valid data and below the threshold level.

Clear to 0 when RBR is less than threshold level from

reading RBR.

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5.1.4 Bank0~3.Reg3 - CIR Control Register 0/Bank Select Register (CTR0/BSR) (BANK0~3)

Power on default <7:0> = 00000000 binary

Bit

Name

Read/Write

Description

7-6

BNK_SEL<1:0>

Read/Write Bank Select Register. These two bits are shared same

address so that

Bank Select Register (BSR)

can be

programmed to desired Bank in any Bank.
BNK_SEL<1:0> = 00 Select Bank 0.
BNK_SEL<1:0> = 01 Select Bank 1.
BNK_SEL<1:0> = Reserved.
BNK_SEL<1:0> = Reserved.

5-4

RXFTL1/0

Read/Write Receiver FIFO Threshold Level. It is to determine the

RXTH_I to become 1 when the Receiver FIFO Threshold

Level is equal or larger than the defined value shown as

follow.
RXFTL<1:0> = 00 -- 1 byte
RXFTL<1:0> = 01 -- 4 bytes
RXFTL<1:0> = 10 -- 8 bytes
RXFTL<1:0> = 11 -- 14 bytes

TMR_TST

Read/Write Timer Test. Write to 1, then reading the TMRL/TMRH will

return the programmed values of TMRL/TMRH, that is,

does not return down count counter value. This bit is for

test timer register.

EN_TMR

Read/Write Enable timer. Write to 1, enable the timer

RXF_RST

Read/Write Setting this bit to a logical 1 resets the RX FIFO counter

logic to initial state. This bit will clear to a logical 0 by itself

after being set to a logical 1.

TMR_CLK

Read/Write Timer input clock.

Winbond test register

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5.1.5 Bank0.Reg4 - CIR Control Register (CTR)

Power on default <7:0> = 0010,1001 binary

Bit

Name

Read/Write

Description

7-5

RX_FR<2:0>

Read/Write Receiver Frequency Range 2~0. These bits select the input

frequency of the receiver ranges. For the input signal, that

is through a band pass filter, i.e., the frequency of the input

signal is located at this defined range then the signal will

be received.

4-0

RX_FSL<4:0>

Read/Write Receiver Frequency Select 4~0. Select the receiver

operation frequency.

Table: Low Frequency range select of receiver.

RX_FR2~0 (Low Frequency)

001

010

011

RX_FSL4~0

Min.

Max.

Min.

Max.

Min.

Max.

00010

26.1

29.6

24.7

31.7

23.4

34.2

00011

28.2

32.0

26.7

34.3

25.3

36.9

00100

29.4

33.3

27.8

35.7

26.3

38.4

00101

30.0

34.0

28.4

36.5

26.9

39.3

00110

31.4

35.6

29.6

38.1

28.1

41.0

00111

32.1

36.4

30.3

39.0

28.7

42.0

01000

32.8

37.2

31.0

39.8

29.4

42.9

01001

33.6*

38.1*

31.7

40.8

30.1

44.0

01011

34.4

39.0

32.5

41.8

30.8

45.0

01100

36.2

41.0

34.2

44.0

32.4

47.3

01101

37.2

42.1

35.1

45.1

33.2

48.6

01111

38.2

43.2

36.0

46.3

34.1

49.9

10000

40.3

45.7

38.1

49.0

36.1

52.7

10010

41.5

47.1

39.2

50.4

37.2

54.3

10011

42.8

48.5

40.4

51.9

38.3

56.0

10101

44.1

50.0

41.7

53.6

39.5

57.7

10111

45.5

51.6

43.0

55.3

40.7

59.6

11010

48.7

55.2

46.0

59.1

43.6

63.7

11011

50.4

57.1

47.6

61.2

45.1

65.9

11101

54.3

61.5

51.3

65.9

48.6

71.0

Note that the other non-defined values are reserved.

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5.1.7 Bank0.Reg6 - Remote Infrared Config Register (RIR_CFG)

Power on default <7:0> = 0000,0000 binary

Bit

Name

Read/Write

Description

7-6

SMPSEL<1:0>

Read/Write Sampling Mode Select. Select internal decoder

methodology from the internal filter. Selected decoder

mode will determine the receive data format. The sampling

mode is shown as bellow:

SMPSEL<1:0> = 00 T-Period Sample Mode.

SMPSEL<1:0> = 01 Over-Sampling Mode.

SMPSEL<1:0> = 10 Over-Sampling with re-sync.

SMPSEL<1:0> = 11 FIFO Test Mode.

The T-period code format is defined as follows.

The Bit value is set to 0, then the high pulse will be

received. The Bit value is set to 1, then no energy will be

received. The opposite results will be generated when the

bit RXINV (Bank0.Reg6.Bit0) is set to 1.

5-4

LP_SL<1:0>

Read/Write Low pass filter source selcetion.

LP_SL<1:0> = 00 Select raw IRRX signal.
LP_SL<1:0> = 01 Select R.B.P. signal
LP_SL<1:0> = 10 Select D.B.P. signal.
LP_SL<1:0> = 11 Reserved.

3-2

RXDMSL<1:0>

Read/Write Receiver Demodulation Source Selection.

RXDMSL<1:0> = 00 select B.P. and L.P. filter.
RXDMSL<1:0> = 01 select B.P. but not L.P.
RXDMSL<1:0> = 10 Reserved.
RXDMSL<1:0> = 11 do not pass demodulation.

PRE_DIV

Read/Write Baud Rate Pre-divisor. Set to 1, the baud rate generator

input clock is set to 1.8432M Hz which is set to pre-divisor

into 13. When set to 0, the pre-divisor is set to 1, that is,

the input clock of baud rate generator is set to 24M Hz.

RXINV

Read/Write Receiving Signal Invert. Write to 1, Invert the receiving

signal.

B7 B6 B5 B4

B2 B1 B0

Bit value

(Number of bits) - 1

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5.1.8 Bank0.Reg7 - User Defined Register (UDR/AUDR)

Power on default <7:0> = 0000,0000 binary

Bit

Name

Read/Write

Description

RXACT

Read/Write Receive Active. Set to 1 whenever a pulse or pulse-train is

detected by the receiver. If a 1 is written into the bit

position, the bit is cleared and the receiver is de-actived.

When this bit is set, the receiver samples the IR input

continuously at the programmed baud rate and transfers

the data to the receiver FIFO.

RX_PD

Read Only

Set to 1 whenever a pulse or pulse-train (modulated pulse)

is detected by the receiver. Can be used by the sofware to

detect idle condition Cleared Upon Read.

Reserved

4-0

FOLVAL

Read Only

FIFO Level Value. Indicate that how many bytes are there

in the current received FIFO. Can read these bits then get

the FIFO level value and successively read RBR by the

prior value.

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5.1.9 Bank1.Reg0~1 - Baud Rate Divisor Latch (BLL/BHL)

The two registers of BLL and BHL are baud rate divisor latch in the legacy UART/SIR/ASK-IR mode.

Read/Write these registers, if set in Advanced UART mode, will occur backward operation, that is, will

go to legacy UART mode and clear some register values shown table as follows.

TABLE :BAUD RATE TABLE

BAUD RATE USING 24 MHZ TO GENERATE 1.8461 MHZ

Desired Baud Rate

Decimal divisor used to

generate 16X clock

Percent error difference between

desired and actual

2304

1536

110

1047

0.18%

134.5

857

0.099%

150

768

300

384

600

192

1200

1800

2000

0.53%

2400

3600

4800

7200

9600

19200

38400

57600

115200

1.5M

Note 1

Note 1: Only use in high speed mode, when Bank0.Reg6.Bit7 is set.
** The percentage error for all baud rates, except where indicated otherwise, is 0.16%

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5.1.10 Bank1.Reg2 - Version ID Regiister I (VID)

Power on default <7:0> = 0001,0000 binary

Bit

Name

Read/Write

Description

7-0

VID

Read Only

Version ID, default is set to 0x10.

5.1.11 Bank0~3.Reg3 - CIR Control Register 0/Bank Select Register (CTR0/BSR) (BANK0~3)

This register is defined same as in Bank0.Reg3.

5.1.12 Bank1.Reg4 - Timer Low Byte Register (TMRL)

Power on default <7:0> = 0000,0000 binary

Bit

Name

Read/Write

Description

7-0

TMRL

Read/Write Timer Low Byte Register. This is a 12-bit timer (another 4-

bit is defined in Bank1.Reg5) which resolution is 1 ms, that
is, the programmed maximum time is 2

-1 ms. The timer

is a down-counter. The timer start down count when the bit

EN_TMR (Enable Timer) of Bank0.Reg2. is set to 1. When

the timer down count to

zero

and EN_TMR=1, the TMR_I is

set to 1. When the counter down count to zero, a new

initial value will be re-loaded into timer counter.

5.1.13 Bank1.Reg5 - Timer High Byte Register (TMRH)

Power on default <7:0> = 0000,0000 binary

Bit

Name

Read/Write

Description

7-4

Reserved

Reserved.

3-0

TMRH

Read/Write Timer High Byte Register. See Bank1.Reg4.

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6. PARALLEL PORT

6.1 Printer Interface Logic

The parallel port of the W83627HF makes possible the attachment of various devices that accept eight

bits of parallel data at standard TTL level. The W83627HF supports an IBM XT/AT compatible parallel

port (SPP), bi-directional parallel port (BPP), Enhanced Parallel Port (EPP), Extended Capabilities

Parallel Port (ECP), Extension FDD mode (EXTFDD), Extension 2FDD mode (EXT2FDD) on the parallel

port. Refer to the configuration registers for more information on disabling, power-down, and on selecting

the mode of operation.

Table 6-1 shows the pin definitions for different modes of the parallel port.

TABLE 6-1-1

PARALLEL PORT CONNECTOR AND PIN DEFINITIONS

HOST

CONNECTOR

PIN NUMBER

OF W83627HF

PIN

ATTRIBUTE

SPP

EPP

ECP

nSTB

nWrite

nSTB, HostClk

2-9

31-26, 24-23

I/O

PD<0:7>

nACK

Intr

nACK, PeriphClk

BUSY

nWait

BUSY, PeriphAck

PEerror, nAckReverse

SLCT

Select

SLCT, Xflag

nAFD

nDStrb

nAFD, HostAck

nERR

nError

nFault

, nPeriphRequest

nINIT

nInit

nINIT

, nReverseRqst

nSLIN

nAStrb

nSLIN

, ECPMode

Notes:
n<name > : Active Low
1. Compatible Mode
2. High Speed Mode
3. For more information, refer to the IEEE 1284 standard.

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TABLE 6-1-2

PARALLEL PORT CONNECTOR AND PIN DEFINITIONS

HOST

CONNECTOR

PIN NUMBER OF

W83627HF

PIN

ATTRIBUTE

SPP

PIN

ATTRIBUTE

EXT2FDD

PIN

ATTRIBUTE

EXTFDD

nSTB

---

I/O

PD0

INDEX2#

I/O

PD1

TRAK02#

I/O

PD2

WP2#

I/O

PD3

RDATA2#

I/O

PD4

DSKCHG2#

I/O

PD5

---

I/O

PD6

MOA2#

---

I/O

PD7

DSA2#

---

nACK

DSB2#

BUSY

MOB2#

WD2#

SLCT

WE2#

nAFD

RWC2#

nERR

HEAD2#

nINIT

DIR2#

nSLIN

STEP2#

6.2 Enhanced Parallel Port (EPP)

TABLE 6-2

PRINTER MODE AND EPP REGISTER ADDRESS

REGISTER

NOTE

Data port (R/W)

Printer status buffer (Read)

Printer control latch (Write)

Printer control swapper (Read)

EPP address port (R/W)

EPP data port 0 (R/W)

EPP data port 1 (R/W)

EPP data port 2 (R/W)

Notes:
1. These registers are available in all modes.
2. These registers are available only in EPP mode.

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6.2.1 Data Swapper

The system microprocessor can read the contents of the printer's data latch by reading the data

swapper.

6.2.2 Printer Status Buffer

The system microprocessor can read the printer status by reading the address of the printer status

buffer. The bit definitions are as follows:

TMOUT
ERROR

SLCT
PE

BUSY

ACK

Bit 7: This signal is active during data entry, when the printer is off-line during printing, when the print

head is changing position, or during an error state. When this signal is active, the printer is busy

and cannot accept data.

Bit 6: This bit represents the current state of the printer's

ACK#

signal. A 0 means the printer has

received a character and is ready to accept another. Normally, this signal will be active for
approximately 5

microseconds before

BUSY#

stops.

Bit 5: Logical 1 means the printer has detected the end of paper.

Bit 4: Logical 1 means the printer is selected.
Bit 3: Logical 0 means the printer has encountered an error condition.
Bit 1, 2: These two bits are not implemented and are logic one during a read of the status register.

Bit 0: This bit is valid in EPP mode only. It indicates that a 10

�

S time-out has occurred on the EPP

bus. A logic 0 means that no time-out error has occurred; a logic 1 means that a time-out error

has been detected. Writing a logic 1 to this bit will clear the time-out status bit; writing a logic 0

has no effect.

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6.2.3 Printer Control Latch and Printer Control Swapper

The system microprocessor can read the contents of the printer control latch by reading the printer

control swapper. Bit definitions are as follows:

STROBE

AUTO FD

SLCT IN

IRQ ENABLE
DIR

INIT

Bit 7, 6: These two bits are a logic one during a read. They can be written.

Bit 5: Direction control bit

When this bit is a logic 1, the parallel port is in input mode (read); when it is a logic 0, the parallel

port is in output mode (write). This bit can be read and written. In SPP mode, this bit is invalid

and fixed at zero.

Bit 4: A 1 in this position allows an interrupt to occur when

ACK#

changes from low to high.

Bit 3: A 1 in this bit position selects the printer.

Bit 2: A 0 starts the printer (50 microsecond pulse, minimum).

Bit 1: A 1 causes the printer to line-feed after a line is printed.

Bit 0: A 0.5 microsecond minimum high active pulse clocks data into the printer. Valid data must be

present for a minimum of 0.5 microseconds before and after the strobe pulse.

6.2.4 EPP Address Port

The address port is available only in EPP mode. Bit definitions are as follows:

PD0

PD1

PD2

PD3

PD5

PD4

PD6

PD7

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The contents of DB0-DB7 are buffered (non-inverting) and output to ports PD0-PD7 during a write
operation. The leading edge of IOW#

auses an EPP address write cycle to be performed, and the

trailing edge of IOW#

latches the data for the duration of the EPP write cycle.

PD0-PD7 ports are read during a read operation. The leading edge of IOR#

causes an EPP address read

cycle to be performed and the data to be output to the host CPU.

6.2.5 EPP Data Port 0-3

These four registers are available only in EPP mode. Bit definitions of each data port are as follows:

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD7

When accesses are made to any EPP data port, the contents of DB0-DB7 are buffered (non-inverting)

and output to the ports PD0-PD7 during a write operation. The leading edge of IOW#

causes an EPP

data write cycle to be performed, and the trailing edge of IOW#

latches the data for the duration of the

EPP write cycle.

During a read operation, ports PD0-PD7 are read, and the leading edge of

IOR#

causes an EPP read

cycle to be performed and the data to be output to the host CPU.

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6.2.6 Bit Map of Parallel Port and EPP Registers

REGISTER

Data Port (R/W)

PD7

PD6

PD4

PD3

PD2

PD1

PD0

Status Buffer (Read)

BUSY# ACK#

SLCT

ERROF#

TMOUT

Control Swapper
(Read)

IRQEN

SLIN

INIT#

AUTOFD#

STROBE#

Control Latch (Write)

DIR

IRQ

SLIN

INIT#

AUTOFD#

STROBE#

EPP Address Port R/W)

PD7

PD6

PD4

PD3

PD2

PD1

PD0

EPP Data Port 0 (R/W)

PD7

PD6

PD4

PD3

PD2

PD1

PD0

EPP Data Port 1 (R/W)

PD7

PD6

PD4

PD3

PD2

PD1

PD0

EPP Data Port 2 (R/W)

PD7

PD6

PD4

PD3

PD2

PD1

PD0

EPP Data Port 3 (R/W)

PD7

PD6

PD4

PD3

PD2

PD1

PD0

6.2.7 EPP Pin Descriptions

EPP NAME

TYPE

EPP DESCRIPTION

nWrite

Denotes an address or data read or write operation.

PD<0:7>

I/O

Bi-directional EPP address and data bus.

Intr

Used by peripheral device to interrupt the host.

nWait

Inactive to acknowledge that data transfer is completed. Active to indicate

that the device is ready for the next transfer.

Paper end; same as SPP mode.

Select

Printer selected status; same as SPP mode.

nDStrb

This signal is active low. It denotes a data read or write operation.

nError

Error; same as SPP mode.

nInits

This signal is active low. When it is active, the EPP device is reset to its

initial operating mode.

nAStrb

This signal is active low. It denotes an address read or write operation.

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6.2.8 EPP Operation

When the EPP mode is selected in the configuration register, the standard and bi-directional modes are

also available. The PDx bus is in the standard or bi-directional mode when no EPP read, write, or

address cycle is currently being executed. In this condition all output signals are set by the SPP Control

Port and the direction is controlled by DIR of the Control Port.
A watchdog timer is required to prevent system lockup. The timer indicates that more than 10

�

S have

elapsed from the start

of the EPP

cycle to the time

WAIT#

is deasserted. The current EPP cycle is

aborted when a time-out occurs. The time-out condition is indicated in Status bit 0.
6.2.8.1 EPP Operation
The EPP operates on a two-phase cycle. First, the host selects the register within the device for

subsequent operations. Second, the host performs a series of read and/or write byte operations to the

selected register. Four operations are supported on the EPP: Address Write, Data Write, Address Read,

and Data Read. All operations on the EPP device are performed asynchronously.
6.2.8.2 EPP Version 1.9 Operation
The EPP read/write operation can be completed under the following conditions:
a. If the nWait is active low, when the read cycle (nWrite inactive high, nDStrb/nAStrb active low) or write

cycle (nWrite active low, nDStrb/nAStrb active low) starts, the read/write cycle proceeds normally and

will be completed when nWait goes inactive high.
b. If nWait is inactive high, the read/write cycle will not start. It must wait until nWait changes to active

low, at which time it will start as described above.
6.2.8.3 EPP Version 1.7 Operation
The EPP read/write cycle can start without checking whether nWait is active or inactive. Once the

read/write cycle starts, however, it will not terminate until nWait changes from active low to inactive high.

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6.3 Extended Capabilities Parallel (ECP) Port

This

port is software and hardware compatible with existing parallel ports, so it may be used as a

standard printer mode if ECP is not required. It provides an automatic high burst-bandwidth channel that

supports DMA for ECP in both the forward (host to peripheral) and reverse (peripheral to host) directions.
Small FIFOs are used in both forward and reverse directions to improve the maximum bandwidth

requirement. The size of the FIFO is 16 bytes. The ECP port supports an automatic handshake for the

standard parallel port to improve compatibility mode transfer speed.
The ECP port supports run-length-encoded (RLE) decompression (required) in hardware. Compression is

accomplished by counting identical bytes and transmitting an RLE byte that indicates how many times

the next byte is to be repeated. Hardware support for compression is optional.
For more information about the ECP Protocol, refer to the Extended Capabilities Port Protocol and ISA

Interface Standard.

6.3.1 ECP Register and Mode Definitions

NAME

ADDRESS

I/O

ECP MODES

FUNCTION

data

Base+000h

R/W

000-001

Data Register

ecpAFifo

Base+000h

R/W

011

ECP FIFO (Address)

dsr

Base+001h

All

Status Register

dcr

Base+002h

R/W

All

Control Register

cFifo

Base+400h

R/W

010

Parallel Port Data FIFO

ecpDFifo

Base+400h

R/W

011

ECP FIFO (DATA)

tFifo

Base+400h

R/W

110

Test FIFO

cnfgA

Base+400h

111

Configuration Register A

cnfgB

Base+401h

R/W

111

Configuration Register B

ecr

Base+402h

R/W

All

Extended Control Register

Note: The base addresses are specified by CR23, which are determined by configuration register or hardware setting.

MODE

DESCRIPTION

000

SPP mode

001

PS/2 Parallel Port mode

010

Parallel Port Data FIFO mode

011

ECP Parallel Port mode

100

EPP mode (If this option is enabled in the CR9 and CR0 to select ECP/EPP mode)

101

Reserved

110

Test mode

111

Configuration mode

Note: The mode selection bits are bit 7-5 of the Extended Control Register.

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6.3.2 Data and ecpAFifo Port

Modes 000 (SPP) and 001 (PS/2) (Data Port)
During a write operation, the Data Register latches the contents of the data bus on the rising edge of the

input. The contents of this register are output to the PD0-PD7 ports. During a read operation, ports PD0-

PD7 are read and output to the host. The bit definitions are as follows:

7 6 5 4 3 2 1 0

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD7

Mode 011 (ECP FIFO-Address/RLE)
A data byte written to this address is placed in the FIFO and tagged as an ECP Address/RLE. The

hardware at the ECP port transmits this byte to the peripheral automatically. The operation of this

7 6 5 4 3 2 1 0

Address or RLE

Address/RLE

6.3.3 Device Status Register (DSR)

These bits are at low level during a read of the Printer Status Register. The bits of this status register are

defined as follows:

7 6 5 4 3 2 1 0

nFault

Select

PError

nAck
nBusy

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Bit 7: This bit reflects the complement of the Busy input.
Bit 6: This bit reflects the nAck input.
Bit 5: This bit reflects the PError input.
Bit 4: This bit reflects the Select input.
Bit 3: This bit reflects the nFault input.
Bit 2-0: These three bits are not implemented and are always logic one during a read.

6.3.4 Device Control Register (DCR)

The bit definitions are as follows:

7 6 5 4 3 2 1 0

strobe

autofd

nInit

SelectIn

ackIntEn

Direction

Bit 6, 7: These two bits are logic one during a read and cannot be written.

Bit 5: This bit has no effect and the direction is always out if mode = 000 or mode = 010. Direction is

valid in all other modes.

the parallel port is in output mode.

the parallel port is in input mode.

Bit 4: Interrupt request enable. When this bit is set to a high level, it may be used to enable interrupt

requests from the parallel port to the CPU due to a low to high transition on the

ACK#

input.

Bit 3: This bit is inverted and output to the SLIN#

output.

The printer is not selected.

The printer is selected.

Bit 2: This bit is output to the

INIT#

output.

Bit 1: This bit is inverted and output to the

AFD#

output.

Bit 0: This bit is inverted and output to the

STB#

output.

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6.3.5 cFifo (Parallel Port Data FIFO) Mode = 010

This mode is defined only for the forward direction. The standard parallel port protocol is used by a

hardware handshake to the peripheral to transmit bytes written or DMAed from the system to this FIFO.

Transfers to the FIFO are byte aligned.

6.3.6 ecpDFifo (ECP Data FIFO) Mode = 011

When the direction bit is 0, bytes written or DMAed from the system to this FIFO are transmitted by a

hardware handshake to the peripheral using the ECP parallel port protocol. Transfers to the FIFO are

byte aligned.
When the direction bit is 1, data bytes from the peripheral are read under automatic hardware handshake

from ECP into this FIFO. Reads or DMAs from the FIFO will return bytes of ECP data to the system.

6.3.7 tFifo (Test FIFO Mode) Mode = 110

Data bytes may be read, written, or DMAed to or from the system to this FIFO in any direction. Data in

the tFIFO will not be transmitted to the parallel port lines. However, data in the tFIFO may be displayed

on the parallel port data lines.

6.3.8 cnfgA (Configuration Register A) Mode = 111

This register is a read-only register. When it is read, 10H is returned. This indicates to the system that

this is an 8-bit implementation.

6.3.9 cnfgB (Configuration Register B) Mode = 111

The bit definitions are as follows:

7 6 5 4 3 2 1 0

1 1 1

intrValue

compress

IRQx 0

IRQx 1

IRQx 2

Bit 7: This bit is read-only. It is at low level during a read. This means that this chip does not support

hardware RLE compression.

Bit 6: Returns the value on the ISA IRQ line to determine possible conflicts.

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Bit 5-3: Reflect the IRQ resource assigned for ECP port.

cnfgB[5:3]

IRQ resource

000

reflect other IRQ resources selected by PnP register (default)

001

IRQ7

010

IRQ9

011

IRQ10

100

IRQ11

101

IRQ14

110

IRQ15

111

IRQ5

Bit 2-0: These five bits are at high level during a read and can be written

6.3.10 ecr (Extended Control Register) Mode = all

This register controls the extended ECP parallel port functions. The bit definitions are follows:

7 6 5 4 3 2 1 0

empty

full

service Intr

dmaEn

nErrIntrEn

MODE

Bit 7-5: These bits are read/write and select the mode.

000

Standard Parallel Port mode. The FIFO is reset in this mode.

001

PS/2 Parallel Port mode. This is the same as 000 except that direction may be used

to tri-state the data lines and reading the data register returns the value on the data

lines and not the value in the data register.

010

Parallel Port FIFO mode. This is the same as 000 except that bytes are written or

DMAed to the FIFO. FIFO data are automatically transmitted using the standard

parallel port protocol. This mode is useful only when direction is 0.

011

ECP Parallel Port Mode. When the direction is 0 (forward direction), bytes placed into

the ecpDFifo and bytes written to the ecpAFifo are placed in a single FIFO and auto

transmitted to the peripheral using ECP Protocol. When the direction is 1 (reverse

direction), bytes are moved from the ECP parallel port and packed into bytes in the

ecpDFifo.

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100

Selects EPP Mode. In this mode, EPP is activated if the EPP mode is selected.

101

Reserved.

110

Test Mode. The FIFO may be written and read in this mode, but the data will not be

transmitted on the parallel port.

111

Configuration Mode. The confgA and confgB registers are accessible at 0x400 and

0x401 in this mode.

Bit 4: Read/Write (Valid only in ECP Mode)

Disables the interrupt generated on the asserting edge of nFault.

Enables an interrupt pulse on the high to low edge of nFault. If nFault is asserted

(interrupt) an interrupt will be generated and this bit is written from a 1 to 0.

Bit 3: Read/Write

Enables DMA.

Disables DMA unconditionally.

Bit 2: Read/Write

Disables DMA and all of the service interrupts.

Enables one of the following cases of interrupts. When one of the service interrupts

has occurred, the serviceIntr bit is set to a 1 by hardware. This bit must be reset to 0

to re-enable the interrupts. Writing a 1 to this bit will not cause an interrupt.
(a) dmaEn = 1: During DMA this bit is set to a 1 when terminal count is reached.
(b) dmaEn = 0 direction = 0: This bit is set to 1 whenever there are writeIntr Threshold

or more bytes free in the FIFO.
(c) dmaEn = 0 direction = 1: This bit is set to 1 whenever there are readIntr Threshold

or more valid bytes to be read from the FIFO.

Bit 1: Read only

The FIFO has at least 1 free byte.

The FIFO cannot accept another byte or the FIFO is completely full.

Bit 0: Read only

The FIFO contains at least 1 byte of data.

The FIFO is completely empty.

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6.3.12 ECP Pin Descriptions

NAME

TYPE DESCRIPTION

nStrobe (HostClk)

The nStrobe registers data or address into the slave on the

asserting edge during write operations. This signal handshakes

with Busy.

PD<7:0>

I/O

These signals contains address or data or RLE data.

nAck (PeriphClk)

This signal indicates valid data driven by the peripheral when

asserted. This signal handshakes with nAutoFd in reverse.

Busy (PeriphAck)

This signal deasserts to indicate that the peripheral can accept

data. It indicates whether the data lines contain ECP command

information or data in the reverse direction. When in reverse

direction, normal data are transferred when Busy (PeriphAck) is

high and an 8-bit command is transferred when it is low.

PError (nAckReverse)

This signal is used to acknowledge a change in the direction of

the transfer (asserted = forward). The peripheral drives this signal

low to acknowledge nReverseRequest. The host relies upon

nAckReverse to determine when it is permitted to drive the data

bus.

Select (Xflag)

Indicates printer on line.

nAutoFd (HostAck)

Requests a byte of data from the peripheral when it is asserted.

This signal indicates whether the data lines contain ECP address

or data in the forward direction. When in forward direction, normal

data are transferred when nAutoFd (HostAck) is high and an 8-bit

command is transferred when it is low.

nFault (nPeriphRequest)

Generates an error interrupt when it is asserted. This signal is

valid only in the forward direction. The peripheral is permitted (but

not required) to drive this pin low to request a reverse transfer

during ECP Mode.

nInit (nReverseRequest)

This signal sets the transfer direction (asserted = reverse,

deasserted = forward). This pin is driven low to place the channel

in the reverse direction.

nSelectIn (ECPMode)

This signal is always deasserted in ECP mode.

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6.3.13 ECP Operation

The host must negotiate on the parallel port to determine if the peripheral supports the ECP protocol

before ECP operation. After negotiation, it is necessary to initialize some of the port bits. The following

are required:
(a) Set direction = 0, enabling the drivers.
(b) Set strobe = 0, causing the nStrobe signal to default to the deasserted state.
(c) Set autoFd = 0, causing the nAutoFd signal to default to the deasserted state.
(d) Set mode = 011 (ECP Mode)

ECP address/RLE bytes or data bytes may be sent automatically by writing the ecpAFifo or ecpDFifo,

respectively.

6.3.13.1 Mode Switching
Software will execute P1284 negotiation and all operation prior to a data transfer phase under

programmed I/O control (mode 000 or 001). Hardware provides an automatic control line handshake,

moving data between the FIFO and the ECP port only in the data transfer phase (mode 011 or 010).
If the port is in mode 000 or 001 it may switch to any other mode. If the port is not in mode 000 or 001 it

can only be switched into mode 000 or 001. The direction can be changed only in mode 001.
When in extended forward mode, the software should wait for the FIFO to be empty before switching

back to mode 000 or 001. In ECP reverse mode the software waits for all the data to be read from the

FIFO before changing back to mode 000 or 001.

6.3.13.2 Command/Data
ECP mode allows the transfer of normal 8-bit data or 8-bit commands. In the forward direction, normal

data are transferred when HostAck is high and an 8-bit command is transferred when HostAck is low.

The most significant bits of the command indicate whether it is a run-length count (for compression) or a

channel address.
In the reverse direction, normal data are transferred when PeriphAck is high and an 8-bit command is

transferred when PeriphAck is low. The most significant bit of the command is always zero.

6.3.13.3 Data Compression
The W83627HF supports run length encoded (RLE) decompression in hardware and can transfer

compressed data to a peripheral. Note that the odd (RLE) compression in hardware is not supported. In

order to transfer data in ECP mode, the compression count is written to the ecpAFifo and the data byte

is written to the ecpDFifo.

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6.3.14 FIFO Operation

The FIFO threshold is set in configuration register 5. All data transfers to or from the parallel port can

proceed in DMA or Programmed I/O (non-DMA) mode, as indicated by the selected mode. The FIFO is

used by selecting the Parallel Port FIFO mode or ECP Parallel Port Mode. After a reset, the FIFO is

disabled.

6.3.15 DMA Transfers

DMA transfers are always to or from the ecpDFifo, tFifo, or CFifo. The DMA uses the standard PC DMA

services. The ECP requests DMA transfers from the host by activating the PDRQ pin. The DMA will

empty or fill the FIFO using the appropriate direction and mode. When the terminal count in the DMA

controller is reached, an interrupt is generated and serviceIntr is asserted, which will disable the DMA.

6.3.16 Programmed I/O (NON-DMA) Mode

The ECP or parallel port FIFOs can also be operated using interrupt driven programmed I/O.

Programmed I/O transfers are to the ecpDFifo at 400H and ecpAFifo at 000H or from the ecpDFifo

located at 400H, or to/from the tFifo at 400H. The host must set the direction, state, dmaEn = 0 and

serviceIntr = 0 in the programmed I/O transfers.
The ECP requests programmed I/O transfers from the host by activating the IRQ pin. The programmed

I/O will empty or fill the FIFO using the appropriate direction and mode.

6.4 Extension FDD Mode (EXTFDD)

In this mode, the W83627HF changes the printer interface pins to FDC input/output pins, allowing the

user to install a second floppy disk drive (FDD B) through the DB-25 printer connector. The pin

assignments for the FDC input/output pins are shown in Table 6-1.
After the printer interface is set to EXTFDD mode, the following occur:
(1) Pins MOB# and DSB# will be forced to inactive state.
(2) Pins DSKCHG#, RDATA#, WP#, TRAK0#, INDEX# will be logically ORed with pins PD4-PD0 to

serve as input signals to the FDC.

(3) Pins PD4-PD0 each will have an internal resistor of about 1K ohm to serve as pull-up resistor for FDD

open drain/collector output.

(4) If the parallel port is set to EXTFDD mode after the system has booted DOS or another operating

system, a warm reset is needed to enable the system to recognize the extension floppy drive.

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6.5 Extension 2FDD Mode (EXT2FDD)

In this mode, the W83627HF changes the printer interface pins to FDC input/output pins, allowing the

user to install two external floppy disk drives through the DB-25 printer connector to replace internal

floppy disk drives A and B. The pin assignments for the FDC input/output pins are shown in Table6-1.
After the printer interface is set to EXTFDD mode, the following occur:
(1) Pins MOA#, DSA#, MOB#, and DSB# will be forced to inactive state.
(2) Pins DSKCHG#, RDATA#, WP#, TRAK0#, and INDEX# will be logically ORed with pins PD4-PD0 to

serve as input signals to the FDC.

(3) Pins PD4-PD0 each will have an internal resistor of about 1K ohm to serve as pull-up resistor for FDD

open drain/collector output.

(4) If the parallel port is set to EXT2FDD mode after the system has booted DOS or another operating

system, a warm reset is needed to enable the system to recognize the extension floppy drive.

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7. KEYBOARD CONTROLLER

The KBC (8042 with licensed KB BIOS) circuit of W83627HF is designed to provide the functions needed
to interface a CPU with a keyboard and/or a PS/2 mouse, and can be used with IBM

�

compatible

personal computers or PS/2-based systems. The controller receives serial data from the keyboard or

PS/2 mouse, checks the parity of the data, and presents the data to the system as a byte of data in its

output buffer. Then, The controller will asserts an interrupt to the system when data are placed in its

output buffer. The keyboard and PS/2 mouse are required to acknowledge all data transmissions. No

transmission should be sent to the keyboard or PS/2 mouse until an acknowledge is received for the

previous data byte.

8042

P24

P25
P21

P20

P27
P10

P26

P23
T1
P22

P11

KIRQ
MIRQ

GATEA20
KBRST

P17

KINH

GP I/O PINS

P12~P16

KDAT

KCLK

MCLK

MDAT

Multiplex I/O PINS

Keyboard and Mouse Interface

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7.1 Output Buffer

The output buffer is an 8-bit read-only register at I/O address 60H (Default, PnP programmable I/O

address LD5-CR60 and LD5-CR61). The keyboard controller uses the output buffer to send the scan

code received from the keyboard and data bytes required by commands to the system. The output

buffer can only be read when the output buffer full bit in the register is "1".

7.2 Input Buffer

The input buffer is an 8-bit write-only register at I/O address 60H or 64H (Default, PnP programmable I/O

address LD5-CR60, LD5-CR61, LD5-CR62, and LD5-CR63). Writing to address 60H sets a flag to

indicate a data write; writing to address 64H sets a flag to indicate a command write. Data written to I/O

address 60H is sent to keyboard (unless the keyboard controller is expecting a data byte) through the

controller's input buffer only if the input buffer full bit in the status register is "0".

7.3 Status Register

The status register is an 8-bit read-only register at I/O address 64H (Default, PnP programmable I/O

address LD5-CR62 and LD5-CR63), that holds information about the status of the keyboard controller

and interface. It may be read at any time.

BIT

BIT FUNCTION

DESCRIPTION

Output Buffer Full

0: Output buffer empty

1: Output buffer full

Input Buffer Full

0: Input buffer empty

1: Input buffer full

System Flag

This bit may be set to 0 or 1 by writing to the system flag

bit in the command byte of the keyboard controller. It

defaults to 0 after a power-on reset.

Command/Data

0: Data byte

1: Command byte

Inhibit Switch

0: Keyboard is inhibited

1: Keyboard is not inhibited

Auxiliary Device Output

Buffer

0: Auxiliary device output buffer empty

1: Auxiliary device output buffer full

General Purpose Time-

out

0: No time-out error

1: Time-out error

Parity Error

0: Odd parity

1: Even parity (error)

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7.4 Commands

COMMAND

FUNCTION

20h

Read Command Byte of Keyboard Controller

60h

Write Command Byte of Keyboard Controller

BIT

BIT DEFINITION

Reserved

IBM Keyboard Translate Mode

Disable Auxiliary Device

Disable Keyboard

Reserve
System Flag

Enable Auxiliary Interrupt

Enable Keyboard Interrupt

A4h

Test Password
Returns 0Fah if Password is loaded
Returns 0F1h if Password is not loaded

A5h

Load Password
Load Password until a "0" is received from the system

A6h

Enable Password
Enable the checking of keystrokes for a match with the password

A7h

Disable Auxiliary Device Interface

A8h

Enable Auxiliary Device Interface

A9h

Interface Test

BIT

BIT DEFINITION

No Error Detected

Auxiliary Device "Clock" line is stuck low

Auxiliary Device "Clock" line is stuck high

Auxiliary Device "Data" line is stuck low

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7.4 Commands, continued

COMMAND

FUNCTION

AAh

Self-test
Returns 055h if self test succeeds

ABh

Interface Test

BIT

BIT DEFINITION

No Error Detected
Keyboard "Clock" line is stuck low

Keyboard "Clock" line is stuck high

Keyboard "Data" line is stuck low

Keyboard "Data" line is stuck high

ADh

Disable Keyboard Interface

AEh

Enable Keyboard Interface

C0h

Read Input Port(P1) and send data to the system

C1h

Continuously puts the lower four bits of Port1 into STATUS register

C2h

Continuously puts the upper four bits of Port1 into STATUS register

D0h

Send Port2 value to the system

D1h

Only set/reset GateA20 line based on the system data bit 1

D2h

Send data back to the system as if it came from Keyboard

D3h

Send data back to the system as if it came from Auxiliary Device

D4h

Output next received byte of data from system to Auxiliary Device

E0h

Reports the status of the test inputs

FXh

Pulse only RC(the reset line) low for 6

�

S if Command byte is even

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7.5 HARDWARE GATEA20/KEYBOARD RESET CONTROL LOGIC

The KBC implements a hardware control logic to speed-up GATEA20 and KBRESET. This control logic

is controlled by LD5-CRF0 as follows:

7.5.1 KB Control Register (Logic Device 5, CR-F0)

BIT

NAME

KCLKS1 KCLKS0 Reserved Reserved Reserved

P92EN

HGA20 HKBRST

KCLKS1, KCLKS0

This 2 bits are for the KBC clock rate selection.

= 0 0

KBC clock input is 6 Mhz

= 0 1

KBC clock input is 8 Mhz

= 1 0

KBC clock input is 12 Mhz

= 1 1

KBC clock input is 16 Mhz

P92EN

(Port 92 Enable)

A "1" on this bit enables Port 92 to control GATEA20 and KBRESET.
A "0" on this bit disables Port 92 functions.

HGA20

(Hardware GATE A20)

A "1" on this bit selects hardware GATEA20 control logic to control GATE A20 signal.
A "0" on this bit disables hardware GATEA20 control logic function.

HKBRST

(Hardware Keyboard Reset)

A "1" on this bit selects hardware KB RESET control logic to control KBRESET signal.
A "0" on this bit disable hardware KB RESET control logic function.
When the KBC receives a data follows a "D1" command, the hardware control logic sets or clears GATE

A20 according to the received data bit 1. Similarly, the hardware control logic sets or clears KBRESET

depending on the received data bit 0. When the KBC receives a "FE" command, the KBRESET is pulse

low for 6

�

S(Min.) with 14

�

S(Min.) delay.

GATEA20 and KBRESET are controlled by either the software control or the hardware control logic and

they are mutually exclusive. Then, GATEA20 and KBRESET are merged along with Port92 when

P92EN bit is set.

7.5.2 Port 92 Control Register (Default Value = 0x24)

BIT

NAME

Res. (0) Res. (0)

Res. (1)

Res. (0)

Res. (1)

SGA20 PLKBRST

SGA20

(Special GATE A20 Control)

A "1" on this bit drives GATE A20 signal to high.
A "0" on this bit drives GATE A20 signal to low.

PLKBRST

(Pull-Low KBRESET)

A "1" on this bit causes KBRESET to drive low for 6

�

S(Min.) with 14

�

S(Min.) delay. Before issuing

another keyboard reset command, the bit must be cleared.

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8. GENERAL PURPOSE I/O

W83627HF provides 24 input/output ports that can be individually configured to perform a simple basic

I/O function or a pre-defined alternate function. Those 24 GP I/O ports are divided into three groups,

each group contains 8 ports. The first group is configured through control registers in logical device 7,

the second group in logical device 8, and the third group in logical device 9. Users can configure each

individual port to be an input or output port by programming respective bit in selection register (CRF0: 0 =

output, 1 = input). Invert port value by setting inversion register (CRF2: 0 = non-inverse, 1 = inverse).

Port value is read/written through data register (CRF1). Table 8.1 and 8.2 gives more details on GPIO's

assignment. In addition, GPIO1 is designed to be functional even in power loss condition (VCC or VSB

is off). Figure 8.1 shows the GP I/O port's structure. Right after Power-on reset, those ports default to

perform basic input function except ports in GPIO1 which maintains its previous settings until a battery

loss condition.
Table 8.1

SELECTION BIT

0 = OUTPUT

1 = INPUT

INVERSION BIT

0 = NON INVERSE

1 = INVERSE

BASIC I/O OPERATIONS

Basic non-inverting output

Basic inverting output

Basic non-inverting input

Basic inverting input

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9. PLUG AND PLAY CONFIGURATION

The W83627HF uses Compatible PNP protocol to access configuration registers for setting up different

types of configurations. In W83627HF, there are eleven Logical Devices (from Logical Device 0 to

Logical Device B with the exception of logical device 4 for backward compatibility) which correspond to

eleven individual functions: FDC (logical device 0), PRT (logical device 1), UART1 (logical device 2),

UART2 (logical device 3), KBC (logical device 5), CIR (Consumer IR, logical device 6), GPIO1 (logical

device 7), GPIO2 (logical device 8), GPIO3 (logical device 9), ACPI ((logical device A), and hardware

monitor (logical device B). Each Logical Device has its own configuration registers (above CR30). Host

can access those registers by writing an appropriate logical device number into logical device select

9.1 Compatible PnP

9.1.1 Extended Function Registers

In Compatible PnP, there are two ways to enter Extended Function and read or write the configuration

registers. HEFRAS (CR26 bit 6) can be used to select one out of these two methods of entering the

Extended Function mode as follows:

HEFRAS

address and value

write 87h to the location 2Eh twice

write 87h to the location 4Eh twice

After Power-on reset, the value on RTSA# (pin 43) is latched by HEFRAS of CR26. In Compatible PnP,

a specific value (87h) must be written twice to the Extended Functions Enable Register (I/O port address

2Eh or 4Eh). Secondly, an index value (02h, 07h-FFh) must be written to the Extended Functions Index

configuration register is to be accessed. The designer can then access the desired configuration

register through the Extended Functions Data Register (I/O port address 2Fh or 4Fh).
After programming of the configuration register is finished, an additional value (AAh) should be written to

EFERs to exit the Extended Function mode to prevent unintentional access to those configuration

registers. The designer can also set bit 5 of CR26 (LOCKREG) to high to protect the configuration

registers against accidental accesses.
The configuration registers can be reset to their default or hardware settings only by a cold reset (pin MR

= 1). A warm reset will not affect the configuration registers.

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9.1.2 Extended Functions Enable Registers (EFERs)

After a power-on reset, the

W83627HF

enters the default operating mode. Before the

W83627HF

enters

the extended function mode, a specific value must be programmed into the Extended Function Enable

Enable Registers are write-only registers. On a PC/AT system, their port addresses are 2Eh or 4Eh (as

described in previous section).

9.1.3 Extended Function Index Registers (EFIRs), Extended Function Data Registers(EFDRs)

After the extended function mode is entered, the Extended Function Index Register (EFIR) must be

loaded with an index value (02h, 07h-FEh) to access Configuration Register 0 (CR0), Configuration

Data Register (EFDR). The EFIRs are write-only registers with port address 2Eh or 4Eh (as described in

section 12.2.1) on PC/AT systems; the EFDRs are read/write registers with port address 2Fh or 4Fh (as

described in section 9.2.1) on PC/AT systems.

9.2 Configuration Sequence

To program W83627HF configuration registers, the following configuration sequence must be followed:
(1). Enter the extended function mode
(2). Configure the configuration registers
(3). Exit the extended function mode

9.2.1 Enter the extended function mode

To place the chip into the extended function mode, two successive wrtites of 0x87 must be applied to

Extended Function Enable Registers(EFERs, i.e. 2Eh or 4Eh).

9.2.2 Configurate the configuration registers

The chip selects the logical device and activates the desired logical devices through Extended Function

Index Register(EFIR) and Extended Function Data Register(EFDR). EFIR is located at the same address

as EFER, and EFDR is located at address (EFIR+1).

First, write the Logical Device Number (i.e.,0x07) to the EFIR and then write the number of the desired

logical device to the EFDR. If accessing the Chip(Global) Control Registers, this step is not required.

Secondly, write the address of the desired configuration register within the logical device to the EFIR and

then write (or read) the desired configuration register through EFDR.

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9.2.3 Exit the extended function mode

To exit the extended function mode, one write of 0xAA to EFER is required. Once the chip exits the

extended function mode, it is in the normal running mode and is ready to enter the configuration mode.

9.2.4 Software programming example

The following example is written in Intel 8086 assembly language. It assumes that the EFER is located

at 2Eh, so EFIR is located at 2Eh and EFDR is located at 2Fh. If HEFRAS (CR26 bit 6) is set, 4Eh can

be directly replaced by 4Eh and 2Fh replaced by 4Fh.
;-----------------------------------------------------------------------------------

; Enter the extended function mode ,interruptible double-write |

;-----------------------------------------------------------------------------------

MOV DX,2EH

MOV AL,87H

OUT

DX,AL

OUT

DX,AL

;-----------------------------------------------------------------------------

; Configurate logical device 1, configuration register CRF0 |

;-----------------------------------------------------------------------------

MOV DX,2EH

MOV AL,07H

OUT

DX,AL

; point to Logical Device Number Reg.

MOV DX,2FH

MOV AL,01H

OUT

DX,AL

; select logical device 1

;

MOV DX,2EH

MOV AL,F0H

OUT

DX,AL

; select CRF0

MOV DX,2FH

MOV AL,3CH

OUT

DX,AL

; update CRF0 with value 3CH

;------------------------------------------

; Exit extended function mode |

;------------------------------------------

MOV DX,2EH

MOV AL,AAH

OUT

DX,AL

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13. CONFIGURATION REGISTER

13.1 Chip (Global) Control Register

CR02 (Default 0x00)

Bit 7 - 1 : Reserved.

Bit 0

: SWRST --> Soft Reset.

CR07

Bit 7 - 0 : LDNB7 - LDNB0 --> Logical Device Number Bit 7 - 0

CR20

Bit 7 - 0 : DEVIDB7 - DEBIDB0 --> Device ID Bit 7 - Bit 0 = 0x52 (read only).

CR21

Bit 7 - 0 : DEVREVB7 - DEBREVB0 --> Device Rev Bit 7 - Bit 0 = 0x1y (read only, y is version no).

CR22 (Default 0xff)

Bit 7

: Reserved.

Bit 6

: HMPWD
= 0 Power down
= 1 No Power down

Bit 5

: URBPWD
= 0 Power down
= 1 No Power down

Bit 4

: URAPWD
= 0 Power down
= 1 No Power down

Bit 3

: PRTPWD
= 0 Power down
= 1 No Power down

Bit 2, 1 : Reserved.

Bit 0

: FDCPWD
= 0 Power down
= 1 No Power down

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CR23 (Default 0x00)

Bit 7 - 1 : Reserved.

Bit 0

: IPD (Immediate Power Down). When set to 1, it will put the whole chip into power down
mode immediately.

CR24 (Default 0b1s000s0s)

Bit 7

: EN16SA
= 0 12 bit Address Qualification
= 1 16 bit Address Qualification

Bit 6

:CLKSEL
= 0 The clock input on Pin 1 should be 24 Mhz.
= 1 The clock input on Pin 1 should be 48 Mhz.
The corresponding power-on setting pin is SOUTB (pin 83).

Bit 5 - 3 : Reserved

Bit 2

: ENKBC
= 0 KBC is disabled after hardware reset.
= 1 KBC is enabled after hardware reset.
This bit is read only, and set/reset by power-on setting pin. The corresponding power-on

setting pin is SOUTA (pin 54).

Bit 1

: Reserved

Bit 0

: PNPCSV
= 0 The Compatible PnP address select registers have default values.
= 1 The Compatible PnP address select registers have no default value.

When trying to make a change to this bit, new value of PNPCVS must be complementary to the old

one to make an effective change. For example, the user must set PNPCVS to 0 first and then reset

it to 1 to reset these PnP registers if the present value of PNPCVS is 1. The corresponding power-

on setting pin is NDTRA (pin 52).

CR25 (Default 0x00)

Bit 7 - 6 : Reserved

Bit 5

: URBTRI

Bit 4

: URATRI

Bit 3

: PRTTRI

Bit 2 - 1 : Reserved

Bit 0

: FDCTRI.

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CR26 (Default 0b0s000000)

Bit 7

: SEL4FDD
= 0 Select two FDD mode.
= 1 Select four FDD mode.

Bit 6

: HEFRAS
These two bits define how to enable Configuration mode. The corresponding power-on

setting pin is NRTSA (pin 51).
HEFRAS Address and Value
= 0 Write 87h to the location 2E twice.
= 1 Write 87h to the location 4Etwice.

Bit 5

: LOCKREG
= 0 Enable R/W Configuration Registers
= 1 Disable R/W Configuration Registers.

Bit 4

:Reserve

Bit 3

: DSFDLGRQ
= 0 Enable FDC legacy mode on IRQ and DRQ selection, then DO register bit 3 is

effective on selecting IRQ

= 1 Disable FDC legacy mode on IRQ and DRQ selection, then DO register bit 3 is not

effective on selecting IRQ

Bit 2

: DSPRLGRQ
= 0 Enable PRT legacy mode on IRQ and DRQ selection, then DCR bit 4 is effective on

selecting IRQ

= 1 Disable PRT legacy mode on IRQ and DRQ selection, then DCR bit 4 is not effective

on selecting IRQ

Bit 1

: DSUALGRQ
= 0 Enable UART A legacy mode IRQ selecting, then MCR bit 3 is effective on

selectingIRQ

= 1 Disable UART A legacy mode IRQ selecting, then MCR bit 3 is not effective on

selecting IRQ

Bit 0

: DSUBLGRQ
= 0 Enable UART B legacy mode IRQ selecting, then MCR bit 3 is effective on selecting

IRQ

= 1 Disable UART B legacy mode IRQ selecting, then MCR bit 3 is not effective on

selecting IRQ

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CR2A (GPIO multiplexed pin selection register 1. VCC powered. Default 0X7C)

Bit 7

: Port Select (select Game Port or General Purpose I/O Port 1)
= 0 Game Port
= 1 General Purpose I/O Port 1 (pin121~128 select function GP10~GP17 or KBC Port 1)

Bit 6

: PIN128S
= 0 8042 P12
= 1 GP10

Bit 5

: PIN127S
= 0 8042 P13
= 1 GP11

Bit 4

: PIN126S
= 0 8042 P14
= 1 GP12

Bit 3

: PIN125S
= 0 8042 P15
= 1 GP13

Bit 2

: PIN124S
= 0 8042 P16
= 1 GP14

Bit 1

: PIN120S
= 0 MSO (MIDI Serial Output)
= 1 IRQIN0 (select IRQ resource through CRF4 Bit 7-4 of Logical Device 8)

Bit 1

: PIN119S
= 0 MS1 (MIDI Serial Input)
= 1 GP20

CR2B(GPIO multiplexed pin selection register 2. VCC powered. Default 0XC0)

Bit 7

:PIN92S
= 0 SCL
= 1 GP21

Bit 6

:PIN91S
= 0 SDA
= 1 GP22

Bit 5

: PIN90S
= 0 PLED (PLED0 control bits are in CRF5 of Logical Device 8)
= 1 GP23

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Bit 4

: PIN89S
= 0 WDTO (Watch Dog Timer is controlled by CRF5, CRF6, CRF7 of Logical Device 8)
= 1 GP24

Bit 3

: PIN88S
= 0 IRRX
= 1 GP25

Bit 2

: PIN87S
= 0 IRTX
= 1 GP26

Bit 1-0 :PIN 2S

= 00 DRVDEN1
= 01 IRQIN1 (select IRQ resource through CRF4 Bit 7-4 of Logical Device8) SMI# (For D

version only)

= 10 Reserved
= 11 GP27

CR2C (Default 0x00)

Reserved

CR2E (Default 0x00)

Test Modes: Reserved for Winbond.

CR2F (Default 0x00)

Test Modes: Reserved for Winbond.

13.2 Logical Device 0 (FDC)

CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 1 : Reserved.

Bit 0

= 1 Activates the logical device.
= 0 Logical device is inactive.

CR60, CR 61 (Default 0x03, 0xf0 if PNPCSV = 0 during POR, default 0x00, 0x00 otherwise)

These two registers select FDC I/O base address [0x100:0xFF8] on 8 byte boundary.

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CR70 (Default 0x06 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 4 : Reserved.

Bit 3 - 0 : These bits select IRQ resource for FDC.

CR74 (Default 0x02 if PNPCSV = 0 during POR, default 0x04 otherwise)

Bit 7 - 3 : Reserved.

Bit 2 - 0 : These bits select DRQ resource for FDC.

= 0x00 DMA0
= 0x01 DMA1
= 0x02 DMA2
= 0x03 DMA3
= 0x04 - 0x07 No DMA active

CRF0 (Default 0x0E)
FDD Mode Register

Bit 7

: FIPURDWN

This bit controls the internal pull-up resistors of the FDC input pins RDATA, INDEX, TRAK0,

DSKCHG, and WP.

= 0 The internal pull-up resistors of FDC are turned on.(Default)
= 1 The internal pull-up resistors of FDC are turned off.

Bit 6

: INTVERTZ

This bit determines the polarity of all FDD interface signals.

= 0 FDD interface signals are active low.
= 1 FDD interface signals are active high.

Bit 5

: DRV2EN (PS2 mode only)

When this bit is a logic 0, indicates a second drive is installed and is reflected in status register A.

Bit 4

: Swap Drive 0, 1 Mode
= 0 No Swap (Default)
= 1 Drive and Motor sel 0 and 1 are swapped.

Bit 3 - 2 :Interface Mode

= 11 AT Mode (Default)
= 10 (Reserved)
= 01 PS/2
= 00 Model 30

Bit 1

: FDC DMA Mode
= 0 Burst Mode is enabled
= 1 Non-Burst Mode (Default)

Bit 0

: Floppy Mode
= 0 Normal Floppy Mode (Default)
= 1 Enhanced 3-mode FDD

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CRF1 (Default 0x00)

Bit 7 - 6 : Boot Floppy

= 00 FDD A
= 01 FDD B
= 10 FDD C
= 11 FDD D

Bit 5, 4 : Media ID1, Media ID0. These bits will be reflected on FDC's Tape Drive Register bit 7, 6.

Bit 3 - 2 : Density Select

= 00 Normal (Default)
= 01 Normal
= 10 1 ( Forced to logic 1)
= 11 0 ( Forced to logic 0)

Bit 1

: DISFDDWR
= 0 Enable FDD write.
= 1 Disable FDD write(forces pins WE, WD stay high).

Bit 0

: SWWP
= 0 Normal, use WP to determine whether the FDD is write protected or not.
= 1 FDD is always write-protected.

CRF2 (Default 0xFF)

Bit 7 - 6 : FDD D Drive Type

Bit 5 - 4 : FDD C Drive Type

Bit 3 - 2 : FDD B Drive Type

Bit 1 - 0 : FDD A Drive Type

CRF4 (Default 0x00)
FDD0 Selection:

Bit 7

: Reserved.

Bit 6

: Precomp. Disable.
= 1 Disable FDC Precompensation.
= 0 Enable FDC Precompensation.

Bit 5

: Reserved.

Bit 4 - 3 : DRTS1, DRTS0: Data Rate Table select (Refer to TABLE A).

= 00 Select Regular drives and 2.88 format
= 01 3-mode drive
= 10 2 Meg Tape
= 11 Reserved

Bit 2

: Reserved.

Bit 1:0 : DTYPE0, DTYPE1: Drive Type select (Refer to TABLE B).

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CRF5 (Default 0x00)

FDD1 Selection: Same as FDD0 of CRF4.

TABLE A

Drive Rate Table

Select

Data Rate

Selected Data Rate

SELDEN

DRTS1

DRTS0

DRATE1

DRATE0

MFM

1Meg

---

500K

250K

300K

150K

250K

125K

1Meg

---

500K

250K

500K

250K

125K

1Meg

---

500K

250K

2Meg

---

250K

125K

TABLE B

DTYPE0

DTYPE1

DRVDEN0(pin 2)

DRVDEN1(pin 3)

DRIVE TYPE

SELDEN

DRATE0

4/2/1 MB 3.5""
2/1 MB 5.25"
2/1.6/1 MB 3.5" (3-MODE)

DRATE1

DRATE0

SELDEN

DRATE0

DRATE1

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13.3 Logical Device 1 (Parallel Port)

CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 1 : Reserved.

Bit 0

= 1 Activates the logical device.
= 0 Logical device is inactive.

CR60, CR 61 (Default 0x03, 0x78 if PNPCSV = 0 during POR, default 0x00, 0x00 otherwise)

These two registers select Parallel Port I/O base address.
[0x100:0xFFC] on 4 byte boundary (EPP not supported) or
[0x100:0xFF8] on 8 byte boundary (all modes supported, EPP is only available when the base

address is on 8 byte boundary).

CR70 (Default 0x07 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 4 : Reserved.

Bit [3:0] : These bits select IRQ resource for Parallel Port.

CR74 (Default 0x04)

Bit 7 - 3 : Reserved.

Bit 2 - 0 : These bits select DRQ resource for Parallel Port.

0x00=DMA0
0x01=DMA1
0x02=DMA2
0x03=DMA3
0x04 - 0x07= No DMA active

CRF0 (Default 0x3F)

Bit 7

: Reserved.

Bit 6 - 3 : ECP FIFO Threshold.

Bit 2 - 0 : Parallel Port Mode (CR28 PRTMODS2 = 0)

= 100 Printer Mode (Default)
= 000 Standard and Bi-direction (SPP) mode
= 001 EPP - 1.9 and SPP mode
= 101 EPP - 1.7 and SPP mode
= 010 ECP mode
= 011 ECP and EPP - 1.9 mode
= 111 ECP and EPP - 1.7 mode.

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13.4 Logical Device 2 (UART A)�)

CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 1 : Reserved.

Bit 0

= 1 Activates the logical device.
= 0 Logical device is inactive.

CR60, CR 61 (Default 0x03, 0xF8 if PNPCSV = 0 during POR, default 0x00, 0x00 otherwise)

These two registers select Serial Port 1 I/O base address [0x100:0xFF8] on 8 byte boundary.

CR70 (Default 0x04 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 4 : Reserved.

Bit 3 - 0 : These bits select IRQ resource for Serial Port 1.

CRF0 (Default 0x00)

Bit 7 - 2 : Reserved.

Bit 1 - 0 : SUACLKB1, SUACLKB0

= 00 UART A clock source is 1.8462 Mhz (24MHz/13)
= 01 UART A clock source is 2 Mhz (24MHz/12)
= 10 UART A clock source is 24 Mhz (24MHz/1)
= 11 UART A clock source is 14.769 Mhz (24mhz/1.625)

13.5 Logical Device 3 (UART B)

CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 1 : Reserved.

Bit 0

= 1 Activates the logical device.
= 0 Logical device is inactive.

CR60, CR 61 (Default 0x02, 0xF8 if PNPCSV = 0 during POR, default 0x00, 0x00 otherwise)

These two registers select Serial Port 2 I/O base address [0x100:0xFF8] on 8 byte boundary.

CR70 (Default 0x03 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 4 : Reserved.

Bit [3:0] : These bits select IRQ resource for Serial Port 2.

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CRF0 (Default 0x00)

Bit 7 - 4 : Reserved.

Bit 3

: RXW4C
= 0 No reception delay when SIR is changed from TX mode to RX mode.
= 1 Reception delays 4 characters-time (40 bit-time) when SIR is changed from TX mode

to RX mode.

Bit 2

: TXW4C
= 0 No transmission delay when SIR is changed from RX mode to TX mode.
= 1 Transmission delays 4 characters-time (40 bit-time) when SIR is changed from RX

mode to TX mode.

Bit 1 - 0 : SUBCLKB1, SUBCLKB0

= 00 UART B clock source is 1.8462 Mhz (24MHz/13)
= 01 UART B clock source is 2 Mhz (24MHz/12)
= 10 UART B clock source is 24 Mhz (24MHz/1)
= 11 UART B clock source is 14.769 Mhz (24mhz/1.625)

CRF1 (Default 0x00)

Bit 7

: Reserved.

Bit 6

: IRLOCSEL. IR I/O pins' location select.
= 0 Through SINB/SOUTB.
= 1 Through IRRX/IRTX.

Bit 5

: IRMODE2. IR function mode selection bit 2.

Bit 4

: IRMODE1. IR function mode selection bit 1.

Bit 3

: IRMODE0. IR function mode selection bit 0.

IR MODE

IR FUNCTION

IRTX

IRRX

00X

Disable

tri-state

high

010*

IrDA

Active pulse 1.6

�

Demodulation into SINB/IRRX

011*

IrDA

Active pulse 3/16 bit time

Demodulation into SINB/IRRX

100

ASK-IR

Inverting IRTX/SOUTB pin

routed to SINB/IRRX

101

ASK-IR

Inverting IRTX/SOUTB & 500 KHZ

clock

routed to SINB/IRRX

110

ASK-IR

Inverting IRTX/SOUTB

Demodulation into SINB/IRRX

111*

ASK-IR

Inverting IRTX/SOUTB & 500 KHZ

clock

Demodulation into SINB/IRRX

Note: The notation is normal mode in the IR function.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 158 - Revision 1.0

Bit 2

: HDUPLX. IR half/full duplex function select.
= 0 The IR function is Full Duplex.
= 1 The IR function is Half Duplex.

Bit 1

: TX2INV
= 0 the SOUTB pin of UART B function or IRTX pin of IR function in normal condition.
= 1 inverse the SOUTB pin of UART B function or IRTX pin of IR function.

Bit 0

: RX2INV.
= 0 the SINB pin of UART B function or IRRX pin of IR function in normal condition.
= 1 inverse the SINB pin of UART B function or IRRX pin of IR function

13.6 Logical Device 5 (KBC)

CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 1 : Reserved.

Bit 0

= 1 Activates the logical device.
= 0 Logical device is inactive.

CR60, CR 61 (Default 0x00, 0x60 if PNPCSV = 0 during POR, default 0x00 otherwise)

These two registers select the first KBC I/O base address [0x100:0xFFF] on 1 byte boundary.

CR62, CR 63 (Default 0x00, 0x64 if PNPCSV = 0 during POR, default 0x00 otherwise)

These two registers select the second KBC I/O base address [0x100:0xFFF] on 1 byte boundary.

CR70 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 4 : Reserved.

Bit [3:0] : These bits select IRQ resource for KINT (keyboard).

CR72 (Default 0x0C if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 4 : Reserved.

Bit [3:0] : These bits select IRQ resource for MINT (PS2 Mouse)

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 159 - Revision 1.0

CRF0 (Default 0x80)

Bit 7 - 6 : KBC clock rate selection

= 00 Select 6MHz as KBC clock input.
= 01 Select 8MHz as KBC clock input.
= 10 Select 12Mhz as KBC clock input.
= 11 Select 16Mhz as KBC clock input.
(W83627HF/F-AW can support these 4 kinds of clock input, but W83627HF/F-PW only

support 12MHz clock input)

Bit 5 - 3 : Reserved.

Bit 2

= 0 Port 92 disable.
= 1 Port 92 enable.

Bit 1

= 0 Gate20 software control.
= 1 Gate20 hardware speed up.

Bit 0

= 0 KBRST software control.
= 1 KBRST hardware speed up.

13.7 Logical Device 6 (CIR)

CR30 (Default 0x00)

Bit 7 - 1 : Reserved.

Bit 0

= 1 Activates the logical device.
= 0 Logical device is inactive.

CR60, CR 61 (Default 0x00, 0x00)

These two registers select CIR I/O base address [0x100:0xFF8] on 8 byte boundary.

CR70 (Default 0x00)

Bit 7 - 4 : Reserved.

Bit [3:0] : These bits select IRQ resource for CIR.

13.8 Logical Device 7 (Game Port and MIDI Port and GPIO Port 1)

CR30 (Default 0x00)

Bit 7 - 1 : Reserved.

Bit 0

= 1 Activate Game Port and MIDI Port.
= 0 Game Port and MIDI Port is inactive.

CR60, CR 61 (Default 0x02, 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)

These two registers select the Game Port base address [0x100:0xFFF] on 1 byte boundary.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 160 - Revision 1.0

CR62, CR 63 (Default 0x03, 0x30 if PNPCSV = 0 during POR, default 0x00 otherwise)

These two registers select the MIDI Port base address [0x100:0xFFF] on 2 byte boundary.

CR70 (Default 0x09 if PNPCSV = 0 during POR, default 0x00 otherwise)

Bit 7 - 4 : Reserved.

Bit [3:0] : These bits select IRQ resource for MIDI Port .

CRF0 (GP10-GP17 I/O selection register. Default 0xFF)

When set to a '1', respective GPIO port is programmed as an input port.
When set to a '0', respective GPIO port is programmed as an output port.

CRF1 (GP10-GP17 data register. Default 0x00)

If a port is programmed to be an output port, then its respective bit can be read/written.
If a port is programmed to be an input port, then its respective bit can only be read.

CRF2 (GP10-GP17 inversion register. Default 0x00)

When set to a '1', the incoming/outgoing port value is inverted.
When set to a '0', the incoming/outgoing port value is the same as in data register.

13.9 Logical Device 8 (GPIO Port 2)

CR30 (GP20-GP27 Default 0x00)

Bit 7 - 1 : Reserved.

Bit 0

= 1 Activate GPIO2.
= 0 GPIO2 is inactive.

CRF0 (GP20-GP27 I/O selection register. Default 0xFF)

When set to a '1', respective GPIO port is programmed as an input port.
When set to a '0', respective GPIO port is programmed as an output port.

CRF1 (GP20-GP27 data register. Default 0x00)

If a port is programmed to be an output port, then its respective bit can be read/written.
If a port is programmed to be an input port, then its respective bit can only be read.

CRF2 (GP20-GP27 inversion register. Default 0x00)

When set to a '1', the incoming/outgoing port value is inverted.
When set to a '0', the incoming/outgoing port value is the same as in data register.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 161 - Revision 1.0

CRF3 (Default 0x00)

Bit 7 - 4 : These bits select IRQ resource for IRQIN1.

Bit 3 - 0 : These bits select IRQ resource for IRQIN0.

CRF4 (Reserved)

CRF5 (PLED mode register. Default 0x00)

Bit 7-6 : select PLED mode

= 00 Power LED pin is tri-stated.
= 01 Power LED pin is drived low.
= 10 Power LED pin is a 1Hz toggle pulse with 50 duty cycle
= 11 Power LED pin is a 1/4Hz toggle pulse with 50 duty cycle.

Bit 5-4 : Reserved

Bit 3

: select WDTO count mode.
= 0 second
= 1 minute

Bit 2

: Enable the rising edge of keyboard Reset(P20) to force Time-out event.
= 0 Disable
= 1 Enable

Bit 1-0 : Reserved

CRF6 (Default 0x00)

Watch Dog Timer Time-out value. Writing a non-zero value to this register causes the counter to

load the value to Watch Dog Counter and start counting down. If the Bit 7 and Bit 6 are set, any

Mouse Interrupt or Keyboard Interrupt event will also cause the reload of previously-loaded non-zero

value to Watch Dog Counter and start counting down. Reading this register returns current value in

Watch Dog Counter instead of Watch Dog Timer Time-out value.

Bit 7 - 0 = 0x00 Time-out Disable

= 0x01 Time-out occurs after 1 second/minute
= 0x02 Time-out occurs after 2 second/minutes
= 0x03 Time-out occurs after 3 second/minutes
................................................
= 0xFF Time-out occurs after 255 second/minutes

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 162 - Revision 1.0

CRF7 (Default 0x00)

Bit 7

: Mouse interrupt reset Enable or Disable
= 1 Watch Dog Timer is reset upon a Mouse interrupt
= 0 Watch Dog Timer is not affected by Mouse interrupt

Bit 6

: Keyboard interrupt reset Enable or Disable
= 1 Watch Dog Timer is reset upon a Keyboard interrupt
= 0 Watch Dog Timer is not affected by Keyboard interrupt

Bit 5

: Force Watch Dog Timer Time-out, Write only*
= 1 Force Watch Dog Timer time-out event; this bit is self-clearing.

Bit 4

: Watch Dog Timer Status, R/W
= 1 Watch Dog Timer time-out occurred
= 0 Watch Dog Timer counting

Bit 3 -0 : These bits select IRQ resource for Watch Dog. Setting of 2 selects SMI.

13.10 Logical Device 9 (GPIO Port 3 This power of the Port is standby source (VSB) )

CR30 (Default 0x00)

Bit 7 - 1 : Reserved

Bit 0

= 1 Activate GPIO3.
= 0 GPIO3 is inactive.

CRF0 (GP30-GP35 I/O selection register. Default 0xFF Bit 7-6: Reserve)

When set to a '1', respective GPIO port is programmed as an input port.
When set to a '0', respective GPIO port is programmed as an output port.

CRF1 (GP30-GP35 data register. Default 0x00 Bit 7-6: Reserve)

If a port is programmed to be an output port, then its respective bit can be read/written.
If a port is programmed to be an input port, then its respective bit can only be read.

CRF2 (GP30-GP35 inversion register. Default 0x00 Bit 7-6: Reserve)

When set to a '1', the incoming/outgoing port value is inverted.
When set to a '0', the incoming/outgoing port value is the same as in data register.

CRF3 (SUSLED mode register. Default 0x00)

Bit 7-6 : select Suspend LED mode

= 00 Suspend LED pin is drived low.
= 01 Suspend LED pin is tri-stated.
= 10 Suspend LED pin is a 1Hz toggle pulse with 50 duty cycle.
= 11 Suspend LED pin is a 1/4Hz toggle pulse with 50 duty cycle.

This mode selection bit 7-6 keep its settings until battery power loss.

Bit 5 - 0 : Reserved.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 163 - Revision 1.0

13.11 Logical Device A (ACPI)

CR30 (Default 0x00)

Bit 7 - 1 : Reserved.

Bit 0

= 1 Activates the logical device.
= 0 Logical device is inactive.

CR70 (Default 0x00)

Bit 7 - 4 : Reserved.

Bit 3 - 0 : These bits select IRQ resources for

PME

CRE0 (Default 0x00)

Bit 7

: DIS-PANSW_IN. Disable panel switch input to turn system power supply on.
= 0 PANSW_IN is wire-ANDed and connected to PANSW_OUT.
= 1 PANSW_IN is blocked and can not affect PANSW_OUT.

Bit 6

: ENKBWAKEUP. Enable Keyboard to wake-up system via PANSW_OUT.
= 0 Disable Keyboard wake-up function.
= 1 Enable Keyboard wake-up function.

Bit 5

: ENMSWAKEUP. Enable Mouse to wake-up system via PANSW_OUT.
= 0 Disable Mouse wake-up function.
= 1 Enable Mouse wake-up function.

Bit 4

: MSRKEY. Select Mouse Left/Right Botton to wake-up system via PANSW_OUT.
= 0 Select click on Mouse Left-botton twice to wake the system up.
= 1 Select click on Mouse right-botton twice to wake the system up.

Bit 3

: ENCIRWAKEUP. Enable CIR to wake-up system via PANSW_OUT.
= 0 Disable CIR wake-up function.
= 1 Enable CIR wake-up function.

Bit 2

: KB/MS Swap. Enable Keyboard/Mouse port-swap.
= 0 Keyboard/Mouse ports are not swapped.
= 1 Keyboard/Mouse ports are swapped.

Bit 1

: MSXKEY. Enable any character received from Mouse to wake-up the system.
= 0 Only click Mouse left/right-botton twice can wake the system up.
= 1 Only click Mouse left/right-botton once can wake the system up.

Bit 0

: KBXKEY. Enable any character received from Keyboard to wake-up the system
= 0 Only predetermined specific key combination can wake up the system.
= 1 Any character received from Keyboard can wake up the system.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 164 - Revision 1.0

CRE1 (Default 0x00) Keyboard Wake-Up Index Register

This register is used to indicate which Keyboard Wake-Up Shift register or Predetermined key Register

is to be read/written via CRE2. The range of Keyboard wake-up index register is 0x00 - 0x19, and the

range of CIR wake-up index register is 0x20 - 0x2F.

CRE2 Keyboard Wake-Up Data Register

This register holds the value of wake-up key register indicated by CRE1. This register can be
read/written.

CRE3 (Read only) Keyboard/Mouse Wake-Up Status Register

Bit 7-5 : Reserved.

Bit 4

: PWRLOSS_STS: This bit is set when power loss occurs.

Bit 3

: CIR_STS. The Panel switch event is caused by CIR wake-up event. This bit is cleared by

reading this register.

Bit 2

: PANSW_STS. The Panel switch event is caused by PANSW_IN. This bit is cleared by

reading this register.

Bit 1

: Mouse_STS. The Panel switch event is caused by Mouse wake-up event. This bit is

cleared by reading this register.

Bit 0

: Keyboard_STS. The Panel switch event is caused by Keyboard wake-up event. This bit

is cleared by reading this register.

CRE4 (Default 0x00)

Bit 7

: Power loss control bit 2.
0 = Disable ACPI resume
1 = Enable ACPI resume

Bit 6-5 : Power loss control bit <1:0>

00 = System always turn off when come back from power loss state.
01 = System always turn on when come back from power loss state.
10 = System turn on/off when come back from power loss state depend on the state

before power loss.

11 = Reserved.

Bit 4

: Suspend clock source select
0 = Use internal clock source.
1 = Use external suspend clock source(32.768KHz).

Bit 3

: Keyboard wake-up type select for wake-up the system from S1/S2.
0 = Password or Hot keys programmed in the registers.
1 =Any key.

Bit 2

: Enable all wake-up event set in CRE0 can wake-up the system from S1/S2 state. This bit

is cleared when wake-up event occurs.
0 = Disable.
1 = Enable.

Bit 1 - 0 : Reserved.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 165 - Revision 1.0

CRE5 (Default 0x00)

Bit 7

: Reserved.

Bit 6 - 0 : Compared Code Length. When the compared codes are storaged in the data register,

these data length should be written to this register.

CRE6 (Default 0x00)

Bit 7 - 6 : Reserved.

Bit 5 - 0 : CIR Baud Rate Divisor. The clock base of CIR is 32khz, so that the baud rate is 32khz

divided by ( CIR Baud Rate Divisor + 1).

CRE7 (Default 0x00)

Bit 7 - 3 : Reserved.

Bit 2

: Reset CIR Power-On function. After using CIR power-on, the software should write logical
1 to restart CIR power-on function.

Bit 1

: Invert RX Data.
= 1 Inverting RX Data.
= 0 Not inverting RX Data.

Bit 0

: Enable Demodulation.
= 1 Enable received signal to demodulate.
= 0 Disable received signal to demodulate.

CRF0 (Default 0x00)

Bit 7

: CHIPPME. Chip level auto power management enable.
= 0 disable the auto power management functions
= 1 enable the auto power management functions.

Bit 6

: CIRPME. Consumer IR port auto power management enable.
= 0 disable the auto power management functions
= 1 enable the auto power management functions.

Bit 5

: MIDIPME. MIDI port auto power management enable.
= 0 disable the auto power management functions
= 1 enable the auto power management functions.

Bit 4

: Reserved. Return zero when read.

Bit 3

: PRTPME. Printer port auto power management enable.
= 0 disable the auto power management functions.
= 1 enable the auto power management functions.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 166 - Revision 1.0

Bit 2

: FDCPME. FDC auto power management enable.
= 0 disable the auto power management functions.
= 1 enable the auto power management functions.

Bit 1

: URAPME. UART A auto power management enable.
= 0 disable the auto power management functions.
= 1 enable the auto power management functions.

Bit 0

: URBPME. UART B auto power management enable.
= 0 disable the auto power management functions.
= 1 enable the auto power management functions.

CRF1 (Default 0x00)

Bit 7

: WAK_STS. This bit is set when the chip is in the sleeping state and an enabled resume

event occurs. Upon setting this bit, the sleeping/working state machine will transition the

system to the working state. This bit is only set by hardware and is cleared by writing a 1

to this bit position or by the sleeping/working state machine automatically when the global
standby timer expires.
= 0 the chip is in the sleeping state.
= 1 the chip is in the working state.

Bit 6 - 5 : Devices' trap status.

Bit 4

: Reserved. Return zero when read.

Bit 3 - 0 : Devices' trap status.

CRF3 (Default 0x00)

Bit 7 - 6 : Reserved. Return zero when read.

Bit 5 - 0 : Device's IRQ status.

These bits indicate the IRQ status of the individual device respectively. The device's IRQ

status bit is set by their source device and is cleared by writing a 1. Writing a 0 has no

effect.

Bit 5

: MOUIRQSTS. MOUSE IRQ status.

Bit 4

: KBCIRQSTS. KBC IRQ status.

Bit 3

: PRTIRQSTS. printer port IRQ status.

Bit 2

: FDCIRQSTS. FDC IRQ status.

Bit 1

: URAIRQSTS. UART A IRQ status.

Bit 0

: URBIRQSTS. UART B IRQ status.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 167 - Revision 1.0

CRF4 (Default 0x00)

Bit 7 - 6 : Reserved. Return zero when read.

Bit 5 - 0 : These bits indicate the IRQ status of the individual GPIO function or logical device

respectively. The status bit is set by their source function or device and is cleared by

writing a1. Writing a 0 has no effect.

Bit 5

: HMIRQSTS. Hardware monitor IRQ status.

Bit 4

: WDTIRQSTS. Watch dog timer IRQ status.

Bit 3

: CIRIRQSTS. Consumer IR IRQ status.

Bit 1

: IRQIN1STS. IRQIN1 status.

Bit 0

: IRQIN0STS. IRQIN0 status.

CRF6 (Default 0x00)

Bit 7 - 6 : Reserved. Return zero when read.

Bit 5 - 0 : Enable bits of the SMI /

PME

generation due to the device's IRQ.

These bits enable the generation of an SMI /

PME

interrupt due to any IRQ of the devices.

SMI /

PME

logic output = (MOUIRQEN and MOUIRQSTS) or (KBCIRQEN and

KBCIRQSTS) or (PRTIRQEN and PRTIRQSTS) or (FDCIRQEN and FDCIRQSTS) or

(URAIRQEN and URAIRQSTS) or (URBIRQEN and URBIRQSTS) or
(HMIRQEN and HMIRQSTS) or (WDTIRQEN and WDTIRQSTS) or
(IRQIN3EN and IRQIN3STS) or (IRQIN2EN and IRQIN2STS) or
(IRQIN1EN and IRQIN1STS) or (IRQIN0EN and IRQIN0STS)

Bit 5

: MOUIRQEN.
= 0 disable the generation of an SMI /

PME

interrupt due to MOUSE's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to MOUSE's IRQ.

Bit 4

: KBCIRQEN.
= 0 disable the generation of an SMI /

PME

interrupt due to KBC's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to KBC's IRQ.

Bit 3

: PRTIRQEN.
= 0 disable the generation of an SMI /

PME

interrupt due to printer port's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to printer port's IRQ.

Bit 2

: FDCIRQEN.
= 0 disable the generation of an SMI /

PME

interrupt due to FDC's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to FDC's IRQ.

Bit 1

: URAIRQEN.
= 0 disable the generation of an SMI /

PME

interrupt due to UART A's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to UART A's IRQ.

Bit 0

: URBIRQEN.
= 0 disable the generation of an SMI /

PME

interrupt due to UART B's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to UART B's IRQ.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 168 - Revision 1.0

CRF7 (Default 0x00)

Bit 7 - 6 : Reserved. Return zero when read

Bit 5 - 0 : Enable bits of the SMI /

PME

generation due to the GPIO IRQ function or device's IRQ.

Bit 5

: HMIRQEN.
= 0 disable the generation of an SMI /

PME

interrupt due to hardware monitor's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to hardware monitor's IRQ.

Bit 4

: WDTIRQEN.
= 0 disable the generation of an SMI /

PME

interrupt due to watch dog timer's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to watch dog timer's IRQ.

Bit 3

: CIRIRQEN.
= 0 disable the generation of an SMI /

PME

interrupt due to CIR's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to CIR's IRQ

Bit 2

: MIDIIRQEN.
= 0 disable the generation of an SMI /

PME

interrupt due to MIDI's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to MIDI's IRQ.

Bit 1

: IRQIN1EN.
= 0 disable the generation of an SMI /

PME

interrupt due to IRQIN1's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to IRQIN1's IRQ.

Bit 0

: IRQIN0EN.
= 0 disable the generation of an SMI /

PME

interrupt due to IRQIN0's IRQ.

= 1 enable the generation of an SMI /

PME

interrupt due to IRQIN0's IRQ.

CRF9 (Default 0x00)

Bit 7 - 3 : Reserved. Return zero when read.

Bit 2

: PME_EN: Select the power management events to be either an

PME

or SMI interrupt for

the IRQ events. Note that: this bit is valid only when SMIPME_OE = 1.
= 0 the power management events will generate an SMI event
= 1 the power management events will generate an

PME

event.

Bit 1

: FSLEEP: This bit selects the fast expiry time of individual devices.
= 0 1 second.
= 1 8 milli-seconds

Bit 0

: SMIPME_OE: This is the SMI and

PME

output enable bit.

= 0 neither SMI nor

PME

will be generated. Only the IRQ status bit is set.

= 1 an SMI or

PME

event will be generated.

CRFE, FF (Default 0x00)

Reserved for Winbond test.

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 170 -

Revision 1.0

14. SPECIFICATIONS

14.1 Absolute Maximum Ratings

PARAMETER

RATING

UNIT

Power Supply Voltage (5V)

-0.5 to 7.0

Input Voltage

-0.5 to V

+0.5

RTC Battery Voltage V

BAT

2.2 to 4.0

Operating Temperature

0 to +70

�

Storage Temperature

-55 to +150

�

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability

of the device.

14.2 DC CHARACTERISTICS

(Ta = 0

�

C to 70

�

C, V

= 5V

�

10%, V

= 0V)

PARAMETER

SYM. MIN.

TYP.

MAX.

UNIT

CONDITIONS

RTC Battery Quiescent

Current

BAT

2.4

BAT

= 2.5 V

ACPI Stand-by Power

Supply Quiescent Current

BAT

2.0

= 5.0 V, All ACPI pins are

not connected.

I/O

- TTL level bi-directional pin with source-sink capability of 8 mA

Input Low Voltage

0.8

Input High Voltage

2.0

Output Low Voltage

0.4

= 8 mA

Output High Voltage

2.4

= - 8 mA

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0V

I/O

12t

- TTL level bi-directional pin with source-sink capability of 12 mA

Input Low Voltage

0.8

Input High Voltage

2.0

Output Low Voltage

0.4

= 12 mA

Output High Voltage

2.4

= -12 mA

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0V

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 171 -

Revision 1.0

14.2 DC CHARACTERISTICS, continued

PARAMETER

SYM.

MIN.

TYP.

MAX.

UNIT

CONDITIONS

I/O

12tp3

- 3.3 V TTL level bi-directional pin with source-sink capability of 12 mA

Input Low Voltage

0.8

Input High Voltage

2.0

Output Low Voltage

0.4

= 12 mA

Output High Voltage

2.4

= -12 mA

Input High Leakage

LIH

+10

�

= 3.3V

Input Low Leakage

LIL

-10

�

= 0V

I/OD

12t

- TTL level bi-directional pin with sink capability of 12 mA and open-drain

Input Low Voltage

0.8

Input High Voltage

2.0

Output Low Voltage

0.4

= 12 mA

Input High Leakage

LIH

+10

�

= 3.3V

Input Low Leakage

LIL

-10

�

= 0V

I/O

24t

- TTL level bi-directional pin with source-sink capability of 24 mA

Input Low Voltage

0.8

Input High Voltage

2.0

Output Low Voltage

0.4

= 24 mA

Output High Voltage

2.4

= -24 mA

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0V

OUT

12t

- TTL level output pin with source-sink capability of 12 mA

Output Low Voltage

0.4

= 12 mA

Output High Voltage

2.4

= -12 mA

OUT

12tp3

- 3.3 V TTL level output pin with source-sink capability of 12 mA

Output Low Voltage

0.4

= 12 mA

Output High Voltage

2.4

= -12 mA

- Open-drain output pin with sink capability of 12 mA

Output Low Voltage

0.4

= 12 mA

- Open-drain output pin with sink capability of 24 mA

Output Low Voltage

0.4

= 24 mA

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 172 -

Revision 1.0

14.2 DC CHARACTERISTICS, continued

PARAMETER

SYM.

MIN.

TYP.

MAX.

UNIT

CONDITIONS

- TTL level input pin with internal pull down resistor

Input Low Voltage

0.8

Input High Voltage

2.0

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0 V

pull down resistor

- TTL level input pin

Input Low Voltage

0.8

Input High Voltage

2.0

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0 V

- CMOS level Schmitt-triggered input pin

Input Low Threshold Voltage

1.3

1.5

1.7

= 5 V

Input High Threshold Voltage

3.2

3.5

3.8

= 5 V

Hystersis

1.5

= 5 V

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0 V

- TTL level Schmitt-triggered input pin

Input Low Threshold Voltage

0.5

0.8

1.1

= 5 V

Input High Threshold Voltage

1.6

2.0

2.4

= 5 V

Hystersis

0.5

1.2

= 5 V

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0 V

tsp3

- 3.3 V TTL level Schmitt-triggered input pin

Input Low Threshold Voltage

0.5

0.8

1.1

= 3.3 V

Input High Threshold Voltage

1.6

2.0

2.4

= 3.3 V

Hystersis

0.5

1.2

= 3.3 V

Input High Leakage

LIH

+10

�

= 3.3 V

Input Low Leakage

LIL

-10

�

= 0 V

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 174 -

Revision 1.0

15.2 Parallel Port Extension 2FDD

33
31

29
27

25
23
21

19
17

15
13
11

9
7

5
3
1

PRINTER PORT

13
25
12
24

JP13

WE2/SLCT

WD2/PE

MOB2/BUSY

DSB2/ACK

PD5

DCH2/PD4
RDD2/PD3

STEP2/SLIN

WP2/PD2
DIR2/INIT

TRK02/PD1

HEAD2/ERR

IDX2/PD0

RWC2/AFD

STB

JP 13A

EXT FDC

DCH2

TRK02

RDD2

DIR2

WP2

MOB2

RWC2

DSB2

HEAD2

STEP2

WD2

WE2

IDX2

34
32
30

28
26

24
22
20

18
16

14
12
10

8
6

4
2

DSA2

MOA2

Parallel Port Extension 2FDD Connection Diagram

DSA2/PD7

MOA2/PD6

15.3

Four FDD Mode

G1
A1
B1

G2
A2
B2

1Y0

1Y1
1Y2

1Y3
2Y0

2Y1
2Y2
2Y3

DSA

MOA

DSA

DSB

MOA
MOB

W83977F

74LS139

7407(2)

MOD

MOC

MOB

DSC
DSD

DSB

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 175 -

Revision 1.0

16. ORDERING INSTRUCTION

PART NO.

KBC FIRMWARE

REMARKS

W83627HF-AW

AMIKEY-2

W83627HF-PW

Phoenix MultiKey/42

Only support 12MHz KBC

clock input

17.

HOW TO READ THE TOP MARKING

Example: The top marking of W83627HF-AW

inbond

W83627HF-AW

821A2B282012345

�

AM. MEGA. 87-96

1st line: Winbond logo

2nd line: the type number: W83627HF-AW

3rd line: the source of KBC F/W -- American Megatrends Incorporated

4th line: the tracking code

821 A 2 C 282012345

821

: packages made in '98, week 21

: assembly house ID; A means ASE, S means SPIL.... etc.

: Winbond internal use.

: IC revision; A means version A, B means version B

282012345

: wafer production series lot number

W83627HF/F

PRELIMINARY

Publication Release Date: November 2000

- 176 -

Revision 1.0

18. PACKAGE DIMENSIONS

(128-pin QFP)

Detail F

102

1.Dimension D & E do not include interlead

flash.

2.Dimension b does not include dambar

protrusion/intrusion

3.Controlling dimension : Millimeter
4.General appearance spec. should be based

on final visual inspection spec.

Note:

Seating Plane

See Detail F

128

103

5. PCB layout please use the "mm".

Symbol

c
D

e
H

y
0

A
A

0.08

1.60

0.95

17.40

0.80

17.20

0.65

17.00

14.10

0.20

0.30

2.87

14.00

2.72

0.50

13.90

0.10

2.57

0.25

Min

Nom

Max

Dimension in mm

0.20

0.15

19.90

20.00

20.10

23.00

23.20

23.40

0.35

0.45

0.003

0.063

0.037

0.685

0.031

0.677

0.025

0.669

0.020

0.555

0.008

0.012

0.113

0.551

0.107

0.547

0.004

0.101

0.010

Max

Nom

Min

Dimension in inch

0.006

0.008

0.783 0.787

0.791

0.905

0.913

0.921

0.014

0.018

Headquarters

No. 4, Creation Rd. III

Science-Based Industrial Park

Hsinchu, Taiwan
TEL: 886-35-770066

FAX: 886-35-789467

www: http://www.winbond.com.tw/

Taipei Office

11F, No. 115, Sec. 3, Min-Sheng East Rd.
Taipei, Taiwan

TEL: 886-2-7190505
FAX: 886-2-7197502

TLX: 16485 WINTPE

Winbond Electronics (H.K.) Ltd.

Rm. 803, World Trade Square, Tower II
123 Hoi Bun Rd., Kwun Tong

Kowloon, Hong Kong

TEL: 852-27516023-7
FAX: 852-27552064

Winbond Electronics
(North America) Corp.

2730 Orchard Parkway
San Jose, CA 95134 U.S.A.

TEL: 1-408-9436666

FAX: 1-408-9436668

Note: All data and specifications are subject to change without notice.

Электронный компонент: W83627HF