W742E Просмотр технического описания (PDF) - Winbond

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W742E

4-BIT MICROCONTROLLER

Winbond 

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

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