參數(shù)資料
型號(hào)： USS820D-DB
英文描述： USS-820D USB Device Controller
中文描述： 號(hào)- 820D USB設(shè)備控制器
文件頁(yè)數(shù)： 2/58頁(yè)
文件大?。?/td> 868K
代理商： USS820D-DB
Table of Contents
Contents
Page
Data Sheet, Rev. 4
June 2001
USB Device Controller
USS-820D
2
Agere Systems Inc.
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....................................................................................................................................................12
Special Firmware Action for Shared Register Bits................................................................................................14
Register Reads with Side Effects..........................................................................................................................15
Register Descriptions............................................................................................................................................16
Interrupts .................................................................................................................................................................41
Firmware Responsibilities for USB SETUP Commands..........................................................................................42
Other Firmware Responsibilities..............................................................................................................................43
Frame Timer Behavior.............................................................................................................................................43
Suspend and Resume Behavior..............................................................................................................................43
Hardware Suspend Detect....................................................................................................................................44
Firmware Suspend Initiate ....................................................................................................................................44
Hardware Resume Detect/Initiate.........................................................................................................................45
Hardware Resume Sequence...............................................................................................................................45
Firmware Resume Sequence ...............................................................................................................................45
Special Suspend Considerations for Bus-Powered Devices ................................................................................45
Application Notes.....................................................................................................................................................47
Absolute Maximum Ratings.....................................................................................................................................47
Electrical Characteristics.........................................................................................................................................48
dc Characteristics .................................................................................................................................................48
Power Considerations........................................................................................................................................49
USB Transceiver Driver Characteristics ...............................................................................................................49
Connection Requirements ....................................................................................................................................50
USB Transceiver Connection.............................................................................................................................50
Oscillator Connection Requirements..................................................................................................................51
Outline Diagrams.....................................................................................................................................................52
44-Pin MQFP (USS-820D)....................................................................................................................................52
48-Pin TQFP (USS-820TD) ..................................................................................................................................53
Ordering Information................................................................................................................................................53
Appendix A. Special Function Register Bit Names..................................................................................................54
Appendix B. USS-820D Register Map.....................................................................................................................55
Appendix C. Changes from USS-820/USS-825 Revision B to C ............................................................................56
Appendix D. Changes from USS-820/USS-820T Revision C to D..........................................................................57
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