Preliminary W742C810
4-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION..........................................................................................................................3
2. FEATURES..................................................................................................................................................3
3. PIN CONFIGURATION................................................................................................................................4
4. PIN DESCRIPTION......................................................................................................................................5
4.1 Pad List..................................................................................................................................................6
5. BLOCK DIAGRAM.......................................................................................................................................8
6. FUNCTIONAL DESCRIPTION ....................................................................................................................9
6.1 Program Counter (PC)...........................................................................................................................9
6.2 Stack Register (STACK)........................................................................................................................9
6.3 Program Memory (ROM) .......................................................................................................................9
6.3.1 ROM Page Register (ROMPR) ................................................................................................10
6.4 Data Memory (RAM)............................................................................................................................10
6.4.1 Architecture ..............................................................................................................................10
6.4.2 Page Register (PAGE).............................................................................................................11
6.4.3 WR Page Register (WRP) .......................................................................................................12
6.4.4 Data Bank Register (DBKR).....................................................................................................12
6.5 Accumulator (ACC)..............................................................................................................................13
6.6 Arithmetic and Logic Unit (ALU)...........................................................................................................13
6.7 Main Oscillator......................................................................................................................................13
6.8 Sub-Oscillator.......................................................................................................................................13
6.9 Dividers ................................................................................................................................................13
6.10 Dual-clock operation...........................................................................................................................14
6.11 Watchdog Timer (WDT).....................................................................................................................15
6.12 Timer/Counter ....................................................................................................................................15
6.12.1 Timer 0 (TM0).........................................................................................................................15
6.12.2 Timer 1 (TM1).........................................................................................................................16
6.12.3 Mode Register 0 (MR0)..........................................................................................................17
6.12.4 Mode Register 1 (MR1)..........................................................................................................17
6.13 Interrupts ............................................................................................................................................18
6.14 Stop Mode Operation.........................................................................................................................19
6.14.1 Stop Mode Wake-up Enable Flag for RC Port (SEF).............................................................19
Publication Release Date: May 1999
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Revision A1