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Author Topic: FT90x USB Connection Error  (Read 1483 times)


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FT90x USB Connection Error
« on: October 21, 2019, 11:42:52 AM »


I designed a PCB with FT905L MCU and when board connect to computer via USB, it is not recognized. How to fix this problem?

Device USB\VID_0000&PID_0002\5&3305c25d&0&1 was configured.
   Driver Name: usb.inf
   Class Guid: {36fc9e60-c465-11cf-8056-444553540000}
   Driver Date: 06/21/2006
   Driver Version: 10.0.17763.1
   Driver Provider: Microsoft
   Driver Section: BADDEVICE.Dev.NT
   Driver Rank: 0xFF0000
   Outranked Drivers: usb.inf:USB\DEVICE_DESCRIPTOR_FAILURE:00FF2000
   Device Updated: false
   Parent Device: USB\ROOT_HUB30\4&31305c27&0&0
Device USB\VID_0000&PID_0002\5&3305c25d&0&1 had a problem starting.
   Driver Name: usb.inf
   Class Guid: {36fc9e60-c465-11cf-8056-444553540000}
   Lower Filters:
   Upper Filters:
   Problem: 0x2B
   Problem Status: 0x0

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Re: FT90x USB Connection Error
« Reply #1 on: October 22, 2019, 04:30:59 PM »


It sounds like a problem with your custom hardware.

Also, VID_0000&PID_0002 doesn't match to what the FT905 is associated with.

What firmware is the FT905 running? Have you tried restoring the bootloader using the FT9xx Programming Utility found on your desktop as part of the FT9xx Toolchain?
Which silicon revision are you using? Rev B or the latest Rev C?

Please email your schematics to your local support team for review:


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