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Unknown USB Device (Device Descriptor Request Failed) | Cypress Semiconductor

Unknown USB Device (Device Descriptor Request Failed)

Summary: 2 Replies, Latest post by Shvitzer on 25 Jul 2015 05:04 PM PDT
Verified Answers: 0
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abid.rafique_1412721's picture
1 post


I am using CY8CKit-001 PSOC Development Board and PSoC Creator 2.2 version. I intend to use the UART interface. I am using Windows 8.1 Enterprise N 64-bit OS and have downloaded and installed the following two drivers from Cypress website.

a. CDC_Driver_Windows_Win81_x64   b. Vendor_Class_Driver_Win81_x64

However, as I plug the Serial to USB Cable into PC, I get the following entry in Device Manager

Unknown USB Device (Device Descriptor Request Failed)

and alos a pop up message "USB device not recognized"

Please let me know the concrete steps to follow to resolve this issue.







user_14586677's picture
7646 posts

I would suggest you upgrade to PSOC Creator 3.2.


Regards, Dana.

Shvitzer's picture
1 post

I have been using a Xilinx Zed eval board for a couple of years with no problems. It uses the CY7C64225-28PVXC chip. Two days ago I bought a new PC and let it find the driver for it on the internet, it found it, however, I keep getting the error about Other devices"

"Virtual Serial Port Device 00 "  for which it can't find the driver. I followed the pdf CY7C64225_Setup_GUide_1_1.pdf where it tells me to install the driver twice...This did not help. I am still missing the "Cypress Virtual Comm Port00". What is the proper procedure and where can I find the latest driver for my new ASUS PC?

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