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W742C818 Datasheet

  • W742C818

  • Microcontroller

  • 58頁(yè)

  • ETC

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W742C818
4-BIT MICROCONTROLLER
1.
2.
3.
4.
5.
GENERAL DESCRIPTION ...................................................................................................... 3
FEATURES ............................................................................................................................. 3
PIN CONFIGURATION............................................................................................................ 5
W742C818 PIN DESCRIPTION............................................................................................... 6
FUNCTIONAL DESCRIPTION................................................................................................. 7
5.1
Program Counter (PC) ......................................................................................................... 7
5.2
Stack Register (STACK)....................................................................................................... 7
5.3
Program Memory (ROM)...................................................................................................... 8
5.3.1
ROM Page Register (ROMPR)...................................................................................... 8
5.3.2
ROM Addressing Mode ................................................................................................. 9
5.4
Data Memory (RAM) .......................................................................................................... 10
5.4.1
Architecture................................................................................................................. 10
5.4.2
RAM Page Register (PAGE)........................................................................................ 11
5.4.3
WR Page Register (WRP)........................................................................................... 12
5.4.4
Data Bank Register (DBKRH, DBKRL) ........................................................................ 12
5.4.5
RAM Addressing Mode................................................................................................ 13
5.5
Accumulator (ACC) ............................................................................................................ 14
5.6
Arithmetic and Logic Unit (ALU) ......................................................................................... 14
5.7
Main Oscillator ................................................................................................................... 15
5.8
Sub-Oscillator .................................................................................................................... 15
5.9
Dividers.............................................................................................................................. 15
5.10
Dual-clock operation ....................................................................................................... 16
5.11
Watchdog Timer (WDT) ................................................................................................. 17
5.12
Timer/Counter ................................................................................................................ 18
5.12.1 Timer 0 (TM0) ............................................................................................................. 18
5.12.2 Timer 1 (TM1) ............................................................................................................. 19
5.12.3 Mode Register 0 (MR0) ............................................................................................... 21
5.12.4 Mode Register 1 (MR1) ............................................................................................... 21
5.13
Interrupts ........................................................................................................................ 21
5.14
Stop Mode Operation...................................................................................................... 23
5.14.1 Stop Mode Wake-up Enable Flag for RC and RD Port (SEF) ...................................... 23
5.15
Hold Mode Operation...................................................................................................... 23
5.15.1 Hold Mode Release Enable Flag (HEF,HEFD) ............................................................ 24
5.15.2 Interrupt Enable Flag (IEF).......................................................................................... 25
5.15.3 Port Enable Flag (PEF,P1EF) ..................................................................................... 25
5.15.4 Hold Mode Release Condition Flag (HCF,HCFD) ........................................................ 26
5.15.5 Event Flag (EVF,EVFD).............................................................................................. 27
5.16
Reset Function ............................................................................................................... 27
5.17
Input/Output Ports RA, RB & P0 ..................................................................................... 28
5.17.1 Port Mode 0 Register (PM0)........................................................................................ 29
5.17.2 Port Mode 1 Register (PM1)........................................................................................ 29
5.17.3 Port Mode 2 Register (PM2)........................................................................................ 30
5.17.4 Port Mode 6 Register (PM6)........................................................................................ 30
5.18
Serial I/O interface.......................................................................................................... 30
5.19
Input Ports RC ................................................................................................................ 33
Publication Release Date:October 2000
Revision A2
-1-

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