Datasheet

iii
AT8xC51SND1C
4109E–8051–06/03
Isochronous Transactions....................................................................................92
Miscellaneous......................................................................................................94
Suspend/Resume Management ..........................................................................95
USB Interrupt System ......................................................................................... 97
Registers..............................................................................................................99
MultiMedia Card Controller .............................................................. 109
Card Concept.................................................................................................... 109
Bus Concept ..................................................................................................... 109
Description........................................................................................................ 114
Clock Generator................................................................................................ 114
Command Line Controller................................................................................. 116
Data Line Controller...........................................................................................118
Interrupt .............................................................................................................124
Registers............................................................................................................125
IDE/ATAPI Interface .......................................................................... 131
Description........................................................................................................ 131
Registers........................................................................................................... 133
Serial I/O Port .................................................................................... 134
Mode Selection................................................................................................. 134
Baud Rate Generator........................................................................................ 134
Synchronous Mode (Mode 0) ........................................................................... 135
Asynchronous Modes (Modes 1, 2 and 3).........................................................137
Multiprocessor Communication (Modes 2 and 3) ............................................. 140
Automatic Address Recognition........................................................................ 140
Interrupt .............................................................................................................142
Registers............................................................................................................143
Synchronous Peripheral Interface .................................................. 146
Description.........................................................................................................147
Interrupt ............................................................................................................ 151
Configuration .....................................................................................................152
Registers............................................................................................................156
Two-wire Interface (TWI) Controller ................................................ 158
Description........................................................................................................ 158
Registers........................................................................................................... 172
Analog to Digital Converter ............................................................. 174
Description........................................................................................................ 174
Registers............................................................................................................177
Keyboard Interface ........................................................................... 179
Description........................................................................................................ 179