W742E/C811
4-BIT MICROCONTROLLER
Publication Release Date: December 2000
- 1 - Revision A1
Table of Contents-
1.
GENERAL DESCRIPTION .............................................................................................................3
2.
FEATURES.....................................................................................................................................3
3.
PIN CONFIGURATION...................................................................................................................5
3.1
W742C811 PAD List .........................................................................................................6
4.
PIN DESCRIPTION ........................................................................................................................9
5.
FUNCTIONAL DESCRIPTION .....................................................................................................11
5.1
Program Counter (PC) ....................................................................................................11
5.2
Stack Register (STACK)..................................................................................................11
5.3
Program Memory (ROM) .................................................................................................12
5.3.1
ROM Page Register (ROMPR) .........................................................................................13
5.3.2
ROM Addressing Mode ....................................................................................................13
5.4
Data Memory (RAM)........................................................................................................15
5.4.1
Architecture ......................................................................................................................15
5.4.2
RAM Page Register (PAGE).............................................................................................15
5.4.3
WR Page Register (WRP)................................................................................................16
5.4.4
Data Bank Register (DBKRH, DBKRL).............................................................................17
5.4.5
RAM Addressing Mode .....................................................................................................18
5.5
Accumulator (ACC) .........................................................................................................19
5.6
Arithmetic and Logic Unit (ALU) ......................................................................................19
5.7
Main Oscillator.................................................................................................................19
5.8
Sub-oscillator...................................................................................................................20
5.9
Dividers............................................................................................................................20
5.10
Dual-clock Operation .......................................................................................................20
5.11
Watchdog Timer (WDT) ..................................................................................................21
5.12
Timer/Counter .................................................................................................................22
5.12.1
Timer 0 (TM0) .................................................................................................................22
5.12.2
Timer 1 (TM1) .................................................................................................................23
5.13
Mode Register 0 (MR0) ...................................................................................................25
5.13.1
Mode Register 1 (MR1) ..................................................................................................25
5.14
Interrupts .........................................................................................................................25
5.15
Stop Mode Operation ......................................................................................................27
5.15.1
Stop Mode Wake-up Enable Flag for RC and RD Port (SEF) ........................................27
5.16
Hold Mode Operation ......................................................................................................27
W742E/C811
- 2 -
5.16.1
Hold Mode Release Enable Flag (HEF, HEFD)..............................................................29
5.16.2
Interrupt Enable Flag (IEF) .............................................................................................29
5.16.3
Port Enable Flag (PEF, P1EF)........................................................................................30
5.16.4
Hold Mode Release Condition Flag (HCF, HCFD) .........................................................30
5.16.5
Event Flag (EVF,EVFD)..................................................................................................31
5.17
Reset Function ................................................................................................................32
5.18
Input/Output Ports RA, RB & P0......................................................................................32
5.18.1
Port Mode 0 Register (PM0) ...........................................................................................33
5.18.2
Port Mode 1 Register (PM1) ...........................................................................................34
5.18.3
Port Mode 2 Register (PM2) ...........................................................................................34
5.18.4
Port Mode 6 Register (PM6) ...........................................................................................34
5.18.5
Serial I/O Interface..........................................................................................................35
5.19
Input Ports RC .................................................................................................................37
5.19.1
Port Status Register 0 (PSR0)........................................................................................39
5.20
Input Ports RD .................................................................................................................39
5.20.1
Port Status Register 1 (PSR1)........................................................................................40
5.21
Output Port RE & RF .......................................................................................................41
5.22
Input Port P1....................................................................................................................41
5.23
DTMF Output Pin (DTMF) ...............................................................................................41
5.23.1
DTMF register.................................................................................................................42
5.23.2
Dual Tone Control Register (DTCR) ...............................................................................42
5.24
MFP Output Pin (MFP) ....................................................................................................42
5.25
LCD Controller/Driver ......................................................................................................44
5.25.1
LCD RAM addressing method ........................................................................................45
5.25.2
LCD voltage and contrast adjusting................................................................................46
5.25.3
SEG32-SEG39 using as DC output (NMOS open drain type) ........................................47
5.25.4
The output waveforms for the LCD driving mode ...........................................................47
6.
ABSOLUTE MAXIMUM RATINGS ...............................................................................................48
7.
DC CHARACTERISTICS..............................................................................................................48
8.
AC CHARACTERISTICS ..............................................................................................................49
9.
INSTRUCTION SET TABLE.........................................................................................................50
10.
PACKAGE DIMENSIONS .............................................................................................................59
W742E/C811
Publication Release Date: December 2000
- 3 - Revision A1
1. GENERAL DESCRIPTION
The W742E/C811 (W742C811 is mask type, W742E811 is electrical erasable EPROM type) is a high-
performance 4-bit microcontroller (
C) that built in 640-dot LCD driver. The device contains a 4-bit
ALU, two 8-bit timers, two dividers in dual-clock operation, a 40
16 LCD driver, ten 4-bit I/O ports
(including 2 output port for LED driving), multiple frequency output, and one channel DTMF generator.
There are also eleven interrupt sources and 16-level stack buffer. The W742E/C811 operates on very
low current and has three power reduction modes, hold mode, stop mode and slow mode, which help
to minimize power dissipation.
2. FEATURES
Operating Voltage
-
2.4V 5.5V for mask type
-
2.4V 4.8V for electrical erasable EPROM type
Dual-clock Operation
Main Oscillator
-
3.58 MHz or 400 KHz can be selected by code option
-
Crystal or RC oscillator can be selected by code option
Sub-oscillator
-
Connect to 32.768 KHz crystal only
Memory
-
16384(16K) x 16 bit program ROM (including 64K x 4 bit look-up table)
-
5120(5K) x 4 bit data RAM (including 16 nibbles x 16 pages working registers)
-
40 x 16 LCD data RAM
40 Input/Output Pins
-
Port for input only: 3 ports/12 pins
-
Input/output ports: 3 ports/12 pins
-
High sink current output port for LED driving: 2 port /8 pins
-
DC output port: 2 ports/ 8 pins (selected by code option)
Power-down Mode
-
Hold mode: no operation (main oscillator and sub-oscillator still operate)
-
Stop mode: no operation (main oscillator and sub-oscillator are stopped)
-
Slow mode: main oscillator is stopped, system is operated by the sub-oscillator (32.768 KHz)
W742E/C811
- 4 -
Eleven Interrupt Sources
-
Four internal interrupts (Divider0, Divider1, Timer 0, Timer 1)
-
Seven external interrupts (RC.0-3, P1.2 ( INT0 ), Serial Port, P1.3 ( INT1 ))
LCD Driver Output
-
40 segments x 16 commons
-
1/8 or 1/16 duty (selected by code option) 1/5 bias driving mode
-
Clock source should be the sub-oscillator clock in the dual-clock operation mode
-
8 level software LCD contrast adjusting
-
LCD operating voltage source could come from V
DD
or VLCD1 pin input
MFP Output Pin
-
Output is software controlled to generate modulating or nonmodulating frequency
-
Works as frequency output specified by Timer 1
-
Key tone generator
DTMF Output pin
-
Output is one channel Dual Tone Multi-Frequency signal for dialling
8-bit Serial I/O Interface
-
8-bit transmit/receive mode by internal or external clock source
Two Built-in 14-bit Frequency Dividers
-
Divider0: the clock source is the main oscillator (Fosc)
-
Divider1: the clock source is the sub-oscillator (Fs)
Two Built-in 8-bit Programmable Countdown Tmers
-
Timer 0: one of two internal clock frequencies (F
OSC
/4 or F
OSC
/1024) can be selected
-
Timer 1: with auto-reload function and one of two internal clock frequencies (F
OSC
or F
OSC
/64 or
Fs) can be selected (signal output through MFP pin)
Built-in 18/15-bit Watchdog Timer Selectable for System Reset, Enable/Disable by Code Option
Powerful Instruction Set
16-level Stack Buffer
Packaged in 100-pin QFP
W742E/C811
Publication Release Date: December 2000
- 5 - Revision A1
3. PIN CONFIGURATION
W742E/C811
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1
2
3
18
19
9
7
8
9
0
1
2
3
4
5
6
7
8
9
20
21
22
23
24
0
1
2
3
3
3
3
4
5
3
3
3
6
3
7
8
3
3
9
0
4
51
52
53
54
55
56
57
58
59
60
61
62
63
64
0
6
5
25
26
27
28
29
30
4
1
2
3
4
5
6
7
8
9
4
4
4
4
4
4
4
4
5
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
1
2
3
4
8
8
8
8
8
8
8
8
8
9
9
9
9
9
9
9
9
9
1
0
S E G 3 5
S E G 3 6
S E G 3 7
S E G 3 8
C O M 1 5
S E G 3 9
C O M 1 4
C O M 1 2
C O M 1 1
C O M 0 8
P 0 1
P 0 0
P 1 1
P 1 2
P 1 3
C N
S E G 0 2
S E G 0 8
C P
V L C D 1
C O M 0 2
C O M 0 3
C O M 0 4
C O M 0 5
C O M 0 6
C O M 0 7
S E G 0 0
S
E
G
1
5
S
E
G
1
4
S
E
G
1
3
S
E
G
1
2
X
I
N
1
X
O
U
T
1
R
C
0
R
C
1
R
C
3
R
D
0
C O M 1 3
R
C
2
S
E
G
1
8
S
E
G
1
7
S
E
G
3
0
C O M 1 0
C O M 0 9
C O M 0 0
S
E
G
1
6
R
D
2
M F P
R
D
1
RA0
S E G 0 7
S
E
G
1
1
1 0 0 - p i n Q F P
C O M 0 1
S E G 3 2
S E G 3 1
S E G 3 3
S E G 3 4
RA2
RA3
R B 0
R B 1
R B 2
R B 3
X O U T 2
X I N 2
V S S
R
D
3
R
E
0
R
E
1
R
E
2
R
E
3
R
F
0
R
F
1
R
F
2
R
F
3
/
R
E
S
E
T
V
D
D
P 0 2
P 0 3
P 1 0
S E G 0 1
S E G 0 3
S E G 0 4
S E G 0 5
S E G 0 6
S E G 0 9
S E G 1 0
S
E
G
1
9
S
E
G
2
0
S
E
G
2
1
S
E
G
2
2
S
E
G
2
3
S
E
G
2
4
S
E
G
2
7
S
E
G
2
8
S
E
G
2
9
S
E
G
2
5
S
E
G
2
6
RA1
D T M F
(K0.0)
(K0.1)
(K0.2)
(K0.3)
(K1.0)
(K1.1)
(K1.2)
(K1.3)
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