配置................................................. .................................................. 。 107

读/写数据FIFO ............................................. ......................................... 109

散装/中断交易.............................................. ................................. 110

控制Transactions......................................................................................... 114

同步交易................................................ .................................. 115

杂项....................................................................................................117

暂停/恢复管理.............................................. .......................... 118

USB中断系统............................................... ........................................ 120

Registers............................................................................................................122

IDE / ATAPI接口.............................................. ............................ 132

Description........................................................................................................ 132

Registers........................................................................................................... 134

多媒体卡控制器............................................... ............... 135

卡Concept.................................................................................................... 135

总线的概念..................................................................................................... 135

Description........................................................................................................ 140

时钟Generator................................................................................................ 140

命令行控制............................................... .................................. 142

数据线Controller...........................................................................................144

中断.............................................................................................................150

Registers............................................................................................................151

同步外设接口............................................... ... 157

Description.........................................................................................................158

中断............................................................................................................ 162

组态.....................................................................................................163

Registers............................................................................................................167

串行I / O端口............................................. ....................................... 169

模式选择................................................ ................................................. 169

波特率发生器............................................... ......................................... 169

同步模式（模式0 ） ............................................ ............................... 170

异步模式（模式1,2和3） ........................................ ................. 172

多处理器通信（模式2和模式3 ） .......................................... ... 175

自动地址识别............................................... ......................... 175

中断.............................................................................................................177

Registers............................................................................................................178

双线接口（ TWI ）控制器.......................................... ...... 181

Description........................................................................................................ 181

Registers........................................................................................................... 195

键盘接口................................................ ........................... 198

Description........................................................................................................ 198

234

AT8xC51SND2C

4341E–MP3–06/05