Registers............................................................................................................. 47

波特率选择为UART的模式1和3 ........................................ ....... 47

UART Registers.................................................................................................. 50

中断系统................................................ ................................. 55

Registers............................................................................................................. 56

中断源和向量地址............................................. ............... 63

键盘接口................................................ ............................. 64

Registers............................................................................................................. 65

串行端口接口（ SPI ） ............................................ ....................... 68

Features.............................................................................................................. 68

信号Description............................................................................................... 68

功能说明................................................ ........................................ 70

硬件看门狗定时器............................................... ................. 77

使用WDT ............................................... .................................................. .. 77

WDT在掉电和空闲........................................... .......................... 78

一旦

模式（片上仿真） ............................................ ...... 79

电源管理................................................ ............................ 80

重置..................................................................................................................

建议重设预防腐败的Flash ........................................

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

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

80

82

82

82

断电标志.............................................. ....................................... 84

降低EMI模式............................................... .............................. 85

闪存EEPROM存储器............................................... ...................... 86

Features.............................................................................................................. 86

闪存编程和擦除.............................................. .......................... 86

闪存寄存器和存储器映射............................................. ......................... 87

闪存状态............................................... ........................................... 90

存储器结构................................................ ......................................... 90

Bootloader的结构................................................ ...................................... 91

ISP协议说明............................................... ...................................... 95

功能说明................................................ ........................................ 96

流程说明................................................ ................................................. 97

API调用Description.......................................................................................... 105

电气特性................................................ ................. 107

绝对最大额定值............................................... ............................... 107

ii

xxxxA–8051–10/06