When the device of CYUSB3014 connect to computer,PID and VID are both zero!

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
Anonymous
Not applicable

 we have designed  a device is made up of CYUSB3014 .However,When the device of CYUSB3014 connect to computer,PID and VID are both zero! we can't find out the reason about the phenomenon. Are there maybe some reasons can  cause of the CYUSB3014 don't provide correct PID and VID?

0 Likes
1 Reply
Anonymous
Not applicable

I assume you're talking about connecting CYUSB3014 without any firmware loaded. Please confirm.

   

Anyways VID/PID 0000/0000 means that the host is not able to talk to the device. It knows there is a device connected but the device isn't responding to any of its requests.

   

If a firmware is not loaded, then you would want to review your schematic and layout using AN70707 - EZ-USB® FX3 Hardware Design Guidelines and Schematic Checklist  as reference.

   

If firmware is loaded, it could be firmware issue too. In that case, Please disable bootloading to isolate whether it is a firmware issue or hardware issue.

   

Regards,

   

Anand

0 Likes