Registers..............................................................................................................59
Timers/Counters................................................................................. 65
Timer/Counter Operations .................................................................................. 65
Timer Clock Controller........................................................................................ 65
Timer 0................................................................................................................ 66
Timer 1................................................................................................................ 69
Interrupt .............................................................................................................. 70
Registers..............................................................................................................71
Watchdog Timer ................................................................................. 75
Description.......................................................................................................... 75
Clock Controller .................................................................................................. 75
Operation............................................................................................................ 76
Registers..............................................................................................................77
Data Flow Controller .......................................................................... 78
CPU Interface ..................................................................................................... 78
Clock Unit ........................................................................................................... 78
Data Flow Descriptor .......................................................................................... 78
CRC Processor................................................................................................... 79
Null Device.......................................................................................................... 79
Channel Priority .................................................................................................. 80
Data Flow Status ................................................................................................ 80
Data Flow Abort.................................................................................................. 80
Data Flow Configuration ..................................................................................... 81
Interrupts............................................................................................................. 81
Registers............................................................................................................. 82
USB Controller.................................................................................... 85
Description.......................................................................................................... 85
General Operating Modes .................................................................................. 86
Interrupts............................................................................................................. 87
Power modes...................................................................................................... 88
Speed Control..................................................................................................... 89
Memory Access Capability ................................................................................. 89
Memory Management......................................................................................... 90
PAD suspend...................................................................................................... 91
OTG Timers Customizing ................................................................................... 92
Plug-in detection................................................................................................. 92
ID Detection........................................................................................................ 94
Registers............................................................................................................. 94
USB Software Operating modes....................................................................... 100
USB Device Operating modes......................................................... 101
Introduction....................................................................................................... 101
2
AT85C51SND3A
7632A–MP3–03/06
ATMEL [ ATMEL ]
