Datasheet

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AT8xC51SND1C
4109E–8051–06/03
Reset .................................................................................................................. 46
Reset Recommendation to Prevent Flash Corruption ........................................ 47
Idle Mode............................................................................................................ 47
Power-down Mode.............................................................................................. 48
Registers..............................................................................................................50
Timers/Counters ................................................................................. 51
Timer/Counter Operations .................................................................................. 51
Timer Clock Controller ........................................................................................ 51
Timer 0................................................................................................................ 52
Timer 1................................................................................................................ 54
Interrupt .............................................................................................................. 55
Registers..............................................................................................................56
Watchdog Timer .................................................................................. 59
Description.......................................................................................................... 59
Watchdog Clock Controller................................................................................. 59
Watchdog Operation............................................................................................60
Registers..............................................................................................................61
MP3 Decoder ....................................................................................... 62
Decoder .............................................................................................................. 62
Audio Controls .....................................................................................................64
Decoding Errors.................................................................................................. 64
Frame Information ...............................................................................................65
Ancillary Data...................................................................................................... 65
Interrupt ...............................................................................................................66
Registers..............................................................................................................68
Audio Output Interface ....................................................................... 73
Description.......................................................................................................... 73
Clock Generator...................................................................................................74
Data Converter ................................................................................................... 74
Audio Buffer........................................................................................................ 75
MP3 Buffer.......................................................................................................... 76
Interrupt Request................................................................................................ 76
MP3 Song Playing .............................................................................................. 76
Voice or Sound Playing ...................................................................................... 77
Registers..............................................................................................................78
Universal Serial Bus ........................................................................... 80
Description...........................................................................................................81
Configuration ...................................................................................................... 84
Read/Write Data FIFO ........................................................................................ 86
Bulk/Interrupt Transactions................................................................................. 87
Control Transactions........................................................................................... 91