描述:
现有三星9698芯片的USB接口与PC通信，程序写好后用仿真器仿真能正确找到设备，一切OK，但是烧录OTP后却出现“无法识别的USB设备”，请高手帮忙分析.
另：硬件已验证没有问题，PC端也没有问题。
设备列兴奋时的数据如下：
==仿真时＝＝
Bus Hound 5.00 capture. Complements of www.perisoft.net
ok
Device - Device ID (followed by the endpoint for USB devices)
(11) USB Root Hub
(20) Description of Device here
Phase - Phase Type
CTL USB control transfer
DI Data in
Data - Hex dump of the data transferred
Descr - Description of the phase
Cmd... - Position in the captured data
Delta - Elapsed time from the previous phase to the current phase
Date - Date the phase occurred in year/month/day form
Time - Time the phase occurred in hour:minute:second.millisec form
Device Phase Data Description Cmd.Phase.Ofs(rep) Delta Date Time
------ ----- -------------------------------------------------- ---------------- ------------------ ----- ---------- ------------
11.0 CTL a3 00 00 00 01 00 04 00 GET STATUS 1.1.0(2) 6.4sc 2005-05-27 02:57:44.646
11.0 DI 01 03 01 00 .... 1.2.0 49us 2005-05-27 02:57:44.646
11.0 CTL 23 01 10 00 01 00 00 00 CLEAR FEATURE 3.1.0 124us 2005-05-27 02:57:44.646
11.0 CTL a3 00 00 00 01 00 04 00 GET STATUS 4.1.0(2) 132us 2005-05-27 02:57:44.646
11.0 DI 01 03 00 00 .... 4.2.0 58us 2005-05-27 02:57:44.646
11.0 CTL 23 03 04 00 01 00 00 00 SET FEATURE 6.1.0 115ms 2005-05-27 02:57:44.762
11.0 CTL a3 00 00 00 01 00 04 00 GET STATUS 7.1.0 26ms 2005-05-27 02:57:44.788
11.0 DI 03 03 10 00 .... 7.2.0 55us 2005-05-27 02:57:44.788
11.0 CTL 23 01 14 00 01 00 00 00 CLEAR FEATURE 8.1.0 12us 2005-05-27 02:57:44.788
11.0 CTL a3 00 00 00 01 00 04 00 GET STATUS 9.1.0(2) 26ms 2005-05-27