AT89C51AC3-RDTIM datasheet(141/143 Pages) ATMEL

141 / 143 page

AT89C51AC3

4383B–8051–01/05

Program/Code Memory ..................................................................... 38

Flash Memory Architecture................................................................................. 40

Overview of FM0 Operations .............................................................................. 44

Operation Cross Memory Access .................................................... 53

Sharing Instructions.......................................................................... 54

In-System Programming (ISP) .......................................................... 56

Flash Programming and Erasure........................................................................ 56

Boot Process ...................................................................................................... 56

Application Programming Interface..................................................................... 58

XROW Bytes....................................................................................................... 58

Hardware Security Byte ...................................................................................... 59

Serial I/O Port .................................................................................... 60

Framing Error Detection .................................................................................... 60

Automatic Address Recognition.......................................................................... 61

Given Address ................................................................................................... 62

Broadcast Address ............................................................................................ 62

Registers............................................................................................................. 63

Timers/Counters ................................................................................ 66

Timer/Counter Operations .................................................................................. 66

Timer 0................................................................................................................ 66

Timer 1................................................................................................................ 69

Interrupt .............................................................................................................. 70

Registers............................................................................................................. 70

Timer 2 ................................................................................................ 74

Auto-Reload Mode............................................................................................. 74

Programmable Clock-Output .............................................................................. 75

Registers............................................................................................................. 76

Watchdog Timer................................................................................. 79

Watchdog Programming ..................................................................................... 80

Watchdog Timer During Power-down Mode and Idle ......................................... 81

Serial Port Interface (SPI).................................................................. 83

Features.............................................................................................................. 83

Signal Description............................................................................................... 83

Functional Description ........................................................................................ 85

Programmable Counter Array (PCA) ............................................... 94

PCA Timer .......................................................................................................... 94

PCA Modules...................................................................................................... 95

AT89C51AC3-RDTIM 数据表(PDF) 141 Page - ATMEL Corporation

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