AT89C51ID2

PCA看门狗定时器............................................... .......................................... 51

串行I / O端口............................................. ......................................... 52

帧错误检测............................................... ......................................

自动地址识别............................................... ...........................

Registers.............................................................................................................

波特率选择为UART的模式1和3 ........................................ .......

UART Registers..................................................................................................

52

53

55

55

58

中断系统................................................ ................................. 63

Registers............................................................................................................. 64

中断源和向量地址............................................. ............... 71

电源管理................................................ ............................ 72

介绍.........................................................................................................

空闲模式............................................................................................................

掉电模式.............................................. ...............................................

Registers.............................................................................................................

72

72

72

75

键盘接口................................................ ............................. 76

Registers............................................................................................................. 77

2线接口（ TWI ） ........................................... .............................. 80

Description.......................................................................................................... 82

笔记.................................................................................................................. 85

Registers............................................................................................................. 95

串行端口接口（ SPI ） ............................................ ....................... 98

Features.............................................................................................................. 98

信号Description............................................................................................... 98

功能说明................................................ ...................................... 100

硬件看门狗定时器............................................... ............... 107

使用WDT ............................................... .................................................. 107

WDT在掉电和空闲............................................ ....................... 108

ONCE （ TM ）模式（片上仿真） ........................................ ... 109

断电标志.............................................. ..................................... 110

EEPROM数据存储器............................................... ...................... 111

写Data......................................................................................................... 111

读Data......................................................................................................... 113

Registers........................................................................................................... 114

降低EMI模式............................................... ............................ 115

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4289C–8051–11/05