W742C814
4-BIT MICROCONTROLLER
Table of Contents-
1.
2.
3.
4.
5.
6.
GENERAL DESCRIPTION .............................................................................................................3
FEATURES .....................................................................................................................................3
PIN CONFIGURATION...................................................................................................................4
PIN DESCRIPTION.........................................................................................................................5
BLOCK DIAGRAM ..........................................................................................................................6
FUNCTIONAL DESCRIPTION .......................................................................................................7
6.1
6.2
6.3
Program Counter (PC)......................................................................................................7
Stack Register (STACK)...................................................................................................7
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
6.6
6.7
6.8
6.9
6.10
6.11
Accumulator (ACC).........................................................................................................11
Arithmetic and Logic Unit (ALU) .....................................................................................11
Oscillator.........................................................................................................................11
Dividers...........................................................................................................................12
Dual-clock Operation ......................................................................................................12
WatchDog Timer (WDT) and WatchDog Timer Register (WDTR).................................13
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
6.13
Interrupts.........................................................................................................................19
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
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