Clock Unit ......................................................................................................... 169
Control Unit....................................................................................................... 169
Data Unit........................................................................................................... 176
End of Data Transfer ........................................................................................ 179
Security Unit ..................................................................................................... 179
Card Unit........................................................................................................... 182
Interrupt Unit..................................................................................................... 183
Registers........................................................................................................... 184
MMC/SD Controller........................................................................... 191
Clock Generator................................................................................................ 191
Command Line Controller................................................................................. 191
Data Line Controller...........................................................................................194
Card Management............................................................................................ 200
Interrupt ............................................................................................................ 201
Registers............................................................................................................202
Parallel Slave Interface .................................................................... 207
Description........................................................................................................ 207
Interrupts........................................................................................................... 210
Registers............................................................................................................211
Serial I/O Port.................................................................................... 213
Description........................................................................................................ 213
Baud Rate Generator........................................................................................ 215
Receiver............................................................................................................ 217
Transmitter........................................................................................................ 218
Interrupts........................................................................................................... 218
Registers........................................................................................................... 219
Serial Peripheral Interface ............................................................... 223
Description........................................................................................................ 224
Interrupt ............................................................................................................ 230
Registers........................................................................................................... 230
Display Interface............................................................................... 233
Configuration .................................................................................................... 233
Registers............................................................................................................236
Keyboard Interface........................................................................... 239
Description........................................................................................................ 239
Registers........................................................................................................... 240
Electrical Characteristics ................................................................. 241
Absolute Maximum Rating................................................................................ 241
DC Characteristics............................................................................................ 241
4
AT85C51SND3A
7632A–MP3–03/06
ATMEL [ ATMEL ]
