209
4109J–8051–10/06
AT8xC51SND1C
10.3 Timer 0 ................................................................................................................53
10.4 Timer 1 ................................................................................................................55
10.5 Interrupt ...............................................................................................................56
10.6 Registers .............................................................................................................56
11
Watchdog Timer ..................................................................................... 60
11.1 Description ..........................................................................................................60
11.2 Watchdog Clock Controller ..................................................................................60
11.3 Watchdog Operation ...........................................................................................61
11.4 Registers .............................................................................................................62
12
MP3 Decoder .......................................................................................... 63
12.1 Decoder ...............................................................................................................63
12.2 Audio Controls .....................................................................................................64
12.3 Decoding Errors ..................................................................................................65
12.4 Frame Information ...............................................................................................66
12.5 Ancillary Data ......................................................................................................66
12.6 Interrupt ...............................................................................................................66
12.7 Registers .............................................................................................................68
13
Audio Output Interface .......................................................................... 73
13.1 Description ..........................................................................................................73
13.2 Clock Generator ..................................................................................................73
13.3 Data Converter ....................................................................................................74
13.4 Audio Buffer .........................................................................................................75
13.5 MP3 Buffer ..........................................................................................................76
13.6 Interrupt Request .................................................................................................76
13.7 MP3 Song Playing ...............................................................................................76
13.8 Voice or Sound Playing .......................................................................................77
13.9 Registers .............................................................................................................77
14
Universal Serial Bus .............................................................................. 80
14.1 Description ..........................................................................................................80
14.2 Configuration .......................................................................................................83
14.3 Read/Write Data FIFO .........................................................................................85
14.4 Bulk/Interrupt Transactions .................................................................................86
14.5 Control Transactions ...........................................................................................90
14.6 Isochronous Transactions ...................................................................................90
14.7 Miscellaneous ......................................................................................................92