W742E/C811
4-BIT MICROCONTROLLER
Table of Contents-
1.
2.
3.
GENERAL DESCRIPTION.............................................................................................................3
FEATURES.....................................................................................................................................3
PIN CONFIGURATION...................................................................................................................5
3.1
W742C811 PAD List .........................................................................................................6
4.
5.
PIN DESCRIPTION ........................................................................................................................9
FUNCTIONAL DESCRIPTION .....................................................................................................11
5.1
5.2
5.3
Program Counter (PC) ....................................................................................................11
Stack Register (STACK)..................................................................................................11
Program Memory (ROM).................................................................................................12
5.3.1 ROM Page Register (ROMPR).........................................................................................13
5.3.2 ROM Addressing Mode ....................................................................................................13
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
Accumulator (ACC) .........................................................................................................19
5.4
5.5
5.6
Arithmetic and Logic Unit (ALU) ......................................................................................19
Main Oscillator.................................................................................................................19
Sub-oscillator...................................................................................................................20
Dividers............................................................................................................................20
Dual-clock Operation.......................................................................................................20
Watchdog Timer (WDT)..................................................................................................21
5.7
5.8
5.9
5.10
5.11
5.12
Timer/Counter .................................................................................................................22
5.12.1 Timer 0 (TM0).................................................................................................................22
5.12.2 Timer 1 (TM1).................................................................................................................23
Mode Register 0 (MR0) ...................................................................................................25
5.13.1 Mode Register 1 (MR1) ..................................................................................................25
Interrupts .........................................................................................................................25
5.13
5.14
5.15
Stop Mode Operation ......................................................................................................27
5.15.1 Stop Mode Wake-up Enable Flag for RC and RD Port (SEF) ........................................27
Hold Mode Operation ......................................................................................................27
5.16
Publication Release Date: December 2000
- 1 -
Revision A1
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