HE11020F

Confidential

2001 / 7 / 17

version 0.96

USB to ATA/ATAPI/SD/MMC Interface

Controller

1 General Description

This chip provides a high-performance interface to bridge USB and ATA/ATAPI/SD/MMC compliance
device, therefore, it could be used to connect IDE hard disk, CD-ROM, CD-RW, Compact Flash card, MMC or SD
memory card. It provides a flexible and low cost single chip solution for applications intended to utilize the convenience
of USB. The maximum supported serial clock in SD/MMC interface is 12MHz and the supported block length is 2048
bytes. The external serial EEPROM gives users the possibility to customize their USB identity, i.e., the user could
modify the vendor ID and product ID for various version of products and stores them in the external EEPROM.

2 Features

USB 1.1 compatible.
Support ATA/ATAPI, PIO mode
SD memory card specification 1.0 compatible.
MMC memory card specification 2.1.1 compatible.
SD/MMC serial clock rate is up to 12MHz.
Built-in FIFO for upstream and downstream data transfer.
Pin selectable bus-power or self-power.
Eight user-defined general purpose IO.
Drivers support Microsoft Windows 98/Windows 2000/Mac
Single 3.3V operation in 80-pin LQFP package.

3. Pin Assignment

3.1 LQFP80 package

HE11020F

Confidential

2001 / 7 / 17

version 0.96

Pin# Pin Name

Type

Drive

Special

Description

VSS

3.3V digital power ground

RSTN

ST, PU

Bridge reset (internal pull-up)

TEST

ST, PD

Test pin

SELPWR

ST, PD

Power select pin; 0: Bus power 1: self power

GPIO0

DIO

8mA

ST, SR

General purpose input/output

GPIO1

DIO

8mA

ST, SR

General purpose input/output

GPIO2

DIO

8mA

ST, SR

General purpose input/output

GPIO3

DIO

8mA

ST, SR

General purpose input/output;

Input also used as USB wakeup

ATANIOR

8mA

APAPI I/O read signal, active low

No connected

ATANIOW

8mA

ATAPI I/O write signal, active low

ATADD3

DIO

8mA

TTL, SR

ATA data bit3

ATADD11

DIO

8mA

TTL, SR

ATA data bit11

ATADD4

DIO

8mA

TTL, SR

ATA data bit4

ATADD12

DIO

8mA

TTL, SR

ATA data bit12

ATADD5

DIO

8mA

TTL, SR

ATA data bit5

ATADD13

DIO

8mA

TTL, SR

ATA data bit13

ATADD6

DIO

8mA

TTL, SR

ATA data bit6

VSS

3.3V digital power ground

No connected

VDD

3.3V digital power supply

XVDD

Oscillator power supply

XIN

Crystal input or oscillator input

XOUT

Crystal input or no connection

XVSS

Oscillator power ground

ATADD14

DIO

8mA

TTL, SR

ATA data bit14

ATADD7

DIO

8mA

TTL, SR

ATA data bit7

VSS

3.3V digital power ground

ATADD15

DIO

8mA

TTL, SR

ATA data bit 15

No connected

ATADD0

DIO

8mA

TTL, SR

ATA data bit 0

ATADD1

DIO

8mA

TTL, SR

ATA data bit 1

ATADD8

DIO

8mA

TTL, SR

ATA data bit 8

ATADD2

DIO

8mA

TTL, SR

ATA data bit 2

ATADD9

DIO

8mA

TTL, SR

ATA data bit 9

ATADD10

DIO

8mA

TTL, SR

ATA data bit 10

ATACS0

8mA

ATAPI chip select 0

VDD

3.3V digital power supply

No connected

VSS

3.3V digital power ground

ATACS1

8mA

ATAPI chip select 1

ATADA2

8mA

ATAPI device address 2

ATADA1

8mA

ATAPI device address 1

ATADA0

8mA

ATAPI device address 0

ATARSTN

8mA

TTL, ST

ATA reset, active low

ATAIRDY

TTL, ST

ATAPI data ready signal, active high

ATAINTR

TTL, ST

ATA interrupt request

VDD

3.3V digital power supply

ROMDO

Serial data from external EEPROM

No connected

ROMSK

4mA

Clock for external serial EEPROM

ROMCS

4mA

SR,

Chip select for external EEPROM

SDDIO0

DIO

8mA

SR, ST

SD/MMC data 0

HE11020F

Confidential

2001 / 7 / 17

version 0.96

SDDIO1/ROMDI

DIO

8mA

SR, ST

SD data 1/serial data to external EEPROM

SDDIO2

DIO

8mA

SR, ST

SD data 2

SDDIO3

DIO

8mA

SR, ST

SD data 3

SDCMD

DIO

8mA

SR, ST

SD/MMC command

VSS

3.3V digital power ground

VDD

3.3V digital power supply

SDCLK

8mA

SD/MMC bus clock

PWRSW

8mA

Power down control

GPIO4

DIO

8mA

ST, SR

General purpose input/output

GPIO5

DIO

8mA

ST, SR

General purpose input/output

GPIO6

DIO

8mA

ST, SR

General purpose input/output; for SD, it is the

write-protect pin

GPIO7

DIO

8mA

ST, SR

General purpose in/output; for SD, it is the card-

detect pin

VSS

3.3V digital power ground

TAVDD

USB transceiver power supply

DPLUS

AIO

USB D+ signal

No connected

DMINUS

AIO

USB D- signal

TAVSS

USB transceiver power ground

AVSS

On-chip PLL power ground

AVDD

On-chip PLL power supply

VDD

3.3V digital power supply

No connected

P: power pin; AI: analog input pin, AIO: analog input/output pin; DI: digital input pin; DO: digital output pin; DIO:
digital input/output pin.

TTL: TTL compatible input pin; ST: schmit trigger pad, PD: pull down; PU: pull up; SR: slew rate control.

4. Block Diagram

HE11020F

Confidential

2001 / 7 / 17

version 0.96

5. Operating Description

5.1 USB Descriptor

This bridge supports one device descriptor with one configuration and one interface. There are three endpoints within the
interface. Endpoint 0 is the default control endpoint. Endpoint 1 is the Bulk-in endpoint ( data from device to host ) and
endpoint 2 is the Bulk-out endpoint ( data from host to device ).

5.1.1 Device Descriptor

Offset

Field

Size

Value

Descriptor

blength

Byte

12H

Size of this descriptor in byte

bdescriptor Type

Byte

01H

DEVICE descriptor type

bcdUSB

Word

0110H

USB specification version 1.1

bdevice Class

Byte

00H

Interface specific

bdevice SubClass

Byte

00H

Interface specific

bdevice Protocol

Byte

00H

Interface specific

bmax Packet Size

Byte

40H

Maximum packet size for endpoint zero is 64

idVendor

Word Note 7 . 1 . 1 Vendor ID

idProduct

Word Note 7 . 1 . 1 Product ID

bdc Device

Word

0100H

Device release 1.0

imanufacture

Byte

00H

Null

iproduct

Byte

00H

Null

Iserial Number

Byte

00H

Null

bnum Configurations

Byte

01H

One possible configuration

Note 7 . 1 . 1 : These values depends on the external EEPROM and the GPIO configuration.

5.1.2 Configuration Descriptor

Offset

Field

Size

Value

Descriptor

bLength

Byte

09H

Size of this descriptor in bytes

bDescriptor

Byte

02H

CONFIGURATION descriptor type

bTotalLength

Word

0020H

bNumInterface

Byte

01H

The bridge has one interface

bConfiguration Value

Byte

01H

iConfiguration

Byte

00H

Null

bmAttributes

Byte

E0H / A0H

Bus / self powered ; depends on PWRSEL. For Bus

power : A0H, For Self power: E0H

MaxPower

Byte

32H / FAH

Depends on PWRSEL, for Bus power : FAH, for self

power : 32H

Электронный компонент: HE11020