2线接口（ TWI ） ........................................... ............................ 131
Description........................................................................................................ 133
笔记................................................................................................................ 136
Registers........................................................................................................... 146
串行端口接口（ SPI ） ............................................ .................... 149
Features............................................................................................................ 149
信号Description............................................................................................. 149
功能说明................................................ ...................................... 151
电源监视器................................................ ................................... 161
Description........................................................................................................ 161
断电标志.............................................. ..................................... 163
复位................................................. ................................................. 164
介绍....................................................................................................... 164
复位输入....................................................................................................... 164
复位输出.....................................................................................................165
电气特性................................................ ................. 166
绝对最大额定值............................................... ............................... 166
DC参数................................................ ................................................. 166
AC参数................................................ ................................................. 168
订购信息................................................ ........................ 178
包装信息................................................ ..................... 179
PLCC44 ............................................................................................................ 179
VQFP44 ............................................................................................................ 181
文档修订历史............................................... .............. 183
改变从7663B到7663C ............................................. ........................... 183
从7663C更改7663D ............................................. ........................... 183
从7663D更改7663E ............................................. ........................... 183
3
AT89C51RE2
7663E–8051–10/08
