Deleted: SA5505
Deleted: W742C811
W742E/C816
4-BIT MICROCONTROLLER
Table of Contents-
1.
2.
3.
4.
5.
GENERAL DESCRIPTION ......................................................................................................... 3
FEATURES ................................................................................................................................. 3
PIN CONFIGURATION............................................................................................................... 5
PIN DESCRIPTION..................................................................................................................... 6
FUNCTIONAL DESCRIPTION.................................................................................................... 7
5.1
5.2
5.3
Program Counter (PC).................................................................................................... 7
Stack Register (STACK)................................................................................................. 8
Program Memory (ROM) ................................................................................................ 8
5.3.1 ROM Page Register (ROMPR).........................................................................................9
5.3.2 ROM Addressing Mode ..................................................................................................10
5.4
Data Memory (RAM)..................................................................................................... 11
5.4.1 Architecture ....................................................................................................................11
5.4.2 RAM Page Register (PAGE) ..........................................................................................12
5.4.3 WR Page Register (WRP)..............................................................................................12
5.4.4 Data Bank Register (DBKRH, DBKRL)...........................................................................13
5.4.5 RAM Addressing Mode...................................................................................................14
5.5
5.6
5.7
5.8
5.9
Accumulator (ACC)....................................................................................................... 15
Arithmetic and Logic Unit (ALU) ................................................................................... 15
Main Oscillator .............................................................................................................. 16
Sub-oscillator ................................................................................................................ 16
Dividers......................................................................................................................... 16
5.10 Dual-clock Operation .................................................................................................... 17
5.11 Watchdog Timer (WDT)................................................................................................ 18
5.12 Timer/Counter............................................................................................................... 19
5.12.1 Timer 0 (TM0)...............................................................................................................19
5.12.2 Timer 1 (TM1)...............................................................................................................20
5.12.3 Mode Register 0 (MR0) ................................................................................................21
5.12.4 Mode Register 1 (MR1) ................................................................................................22
5.13 Interrupts....................................................................................................................... 22
5.14 Stop Mode Operation.................................................................................................... 24
5.14.1 Stop Mode Wake-up Enable Flag for RC and RD Port (SEF) ......................................24
5.15 Hold Mode Operation.................................................................................................... 24
5.15.1 Hold Mode Release Enable Flag (HEF, HEFD)............................................................26
5.15.2 Interrupt Enable Flag (IEF)...........................................................................................26
Publication Release Date: April 15, 2005
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Revision A2