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USS-820FD Datasheet PDF : 56 Pages
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USS-820FD
USB Device Controller
Data Sheet, Rev. 1
August 2004
Table of Contents
Contents
Page
Features ....................................................................................................................................................................1
New Features After Revision B .................................................................................................................................1
Applications ...............................................................................................................................................................1
Description................................................................................................................................................................. 3
Serial Interface Engine............................................................................................................................................ 3
Protocol Layer ......................................................................................................................................................... 4
FIFO Control ........................................................................................................................................................... 4
FIFO Programmability .............................................................................................................................................4
FIFO Access ........................................................................................................................................................... 4
Transmit FIFO ...................................................................................................................................................... 5
Receive FIFO ....................................................................................................................................................... 6
Pin Information .........................................................................................................................................................7
Register Timing Characteristics.................................................................................................................................9
Register Interface ....................................................................................................................................................11
Special Firmware Action for Shared Register Bits ................................................................................................13
Register Reads with Side Effects..........................................................................................................................14
Register Descriptions ............................................................................................................................................15
Interrupts .................................................................................................................................................................40
Firmware Responsibilities for USB SETUP Commands..........................................................................................41
Other Firmware Responsibilities..............................................................................................................................42
Frame Timer Behavior.............................................................................................................................................42
Suspend and Resume Behavior..............................................................................................................................42
Hardware Suspend Detect....................................................................................................................................43
Firmware Suspend Initiate ....................................................................................................................................43
Hardware Resume Detect/Initiate .........................................................................................................................44
Hardware Resume Sequence ...............................................................................................................................44
Firmware Resume Sequence ...............................................................................................................................44
Special Suspend Considerations for Bus-Powered Devices ................................................................................44
Application Notes.....................................................................................................................................................46
USB Application Support Contact Information.........................................................................................................46
Absolute Maximum Ratings.....................................................................................................................................46
Electrical Characteristics .........................................................................................................................................47
dc Characteristics .................................................................................................................................................47
Power Considerations ...........................................................................................................................................48
USB Transceiver Driver Characteristics ...............................................................................................................48
Connection Requirements ....................................................................................................................................49
USB Transceiver Connection .............................................................................................................................49
Oscillator Connection Requirements..................................................................................................................50
Outline Diagrams.....................................................................................................................................................51
48-Ball TFSBGAC (USS-820FD) ..........................................................................................................................51
Ordering Information................................................................................................................................................51
Appendix A. Special Function Register Bit Names..................................................................................................52
Appendix B. USS-820FD Register Map ..................................................................................................................53
Appendix C. Changes from USS-820/USS-825 Revision B to C ............................................................................54
Appendix D. Changes from USS-820 Revision C to D............................................................................................55
Appendix E. Changes from USS-820 Revision D to FD..........................................................................................55
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