Why the ifclk pin of cy7c68013A does not have output working with the driver of usb3.sys?

[qiwec_297866]

Hi

   I found a strange problem. The ifclk pin of cy7c68013A has output working with the driver of CY3684 EZ-USB FX2LP Developmeng kit(the chip VID is 04B4 PID is 8614, same as in inf file), while ifclk pin has no output when I install the driver of cyusb3.sys(the VID and PID is modified as 04B4 8614 in cyusb3.inf).

  Is appears that the iclk pin has output when the chip is powered on(VID 04B4 PID 8614), and no installing cyusb3.sys, if the driver of cyusb3.sys is installed, the output will be disappeared after a few seconds. Is there any limition in cyusb3.sys? How to fix it?

[MallikaK_22 · Accepted solution]

Hi,

If you install the CY3684 package, the driver installed with it is also the cyusb3.sys as shown in the attached screenshot.

The issue you mentioned about IFCLK pin output should not be a driver related issue.

Are you using a custom board?

I would suggest you to double check the hardware of your design, please follow the Application Note: Guide to Successful FX2LP Hardware Design and Debug (https://www.cypress.com/file/135006/download)

If there is no problem with the FX2LP hardware, the IFCLK should have the clock when you configure the register IFCONFIG.

Please follow the TRM (https://www.cypress.com/documentation/technical-reference-manuals/ez-usbr-technical-reference-manual) to ensure the correct configuration of IFCONFIG.

Regards,

Mallika