W742E Datasheet, PDF (1/60 Pages) Winbond – 4 BIT MICROCONTROLLER

W742E/C811
Table of Contents-
4-BIT MICROCONTROLLER
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
Publication Release Date: December 2000
-1-
Revision A1