W742C814 Datasheet, PDF (1/46 Pages) Winbond – 4 BIT MICROCONTROLLER

W742C814
Table of Contents-
4-BIT MICROCONTROLLER
1. GENERAL DESCRIPTION .............................................................................................................3
2. FEATURES .....................................................................................................................................3
3. PIN CONFIGURATION ...................................................................................................................4
4. PIN DESCRIPTION.........................................................................................................................5
5. BLOCK DIAGRAM ..........................................................................................................................6
6. FUNCTIONAL DESCRIPTION .......................................................................................................7
6.1 Program Counter (PC)......................................................................................................7
6.2 Stack Register (STACK) ...................................................................................................7
6.3 Program Memory (ROM) ..................................................................................................7
6.3.1 ROM Page Register (ROMPR) .................................................................................. 8
6.4 Data Memory (RAM).........................................................................................................9
6.4.1 Architecture ................................................................................................................ 9
6.4.2 Page Register (PAGE) ............................................................................................... 9
6.4.3 WR Page Register (WRP)........................................................................................ 10
6.4.4 Data Bank Register (DBKR)..................................................................................... 10
6.5 Accumulator (ACC).........................................................................................................11
6.6 Arithmetic and Logic Unit (ALU) .....................................................................................11
6.7 Oscillator .........................................................................................................................11
6.8 Dividers ...........................................................................................................................12
6.9 Dual-clock Operation ......................................................................................................12
6.10 WatchDog Timer (WDT) and WatchDog Timer Register (WDTR) .................................13
6.11 Timer/Counter .................................................................................................................15
6.11.1 Timer 0 (TM0) ........................................................................................................ 15
6.11.2 Timer 1 (TM1) ........................................................................................................ 16
6.11.3 Mode Register 0 (MR0).......................................................................................... 18
6.11.4 Mode Register 1 (MR1) & MFP Control Pin (BUZCR) ........................................... 18
6.12 Interrupts.........................................................................................................................19
6.13
Stop Mode Operation......................................................................................................20
6.13.1 Stop Mode Wake-up Enable Flag for RC Port (SEF) ............................................. 20
6.14 Hold Mode Operation......................................................................................................21
6.14.1 Hold Mode Release Enable Flag (HEF) ................................................................. 22
6.14.2 Interrupt Enable Flag (IEF)..................................................................................... 22
Publication Release Date: February 12, 2003
-1-
Revision A2