Modify the product ID In FX3 firmware

[MaXi_1246331]

If I modify the product ID in the descriptor for USB2.0 and USB3.0 in the firmware example. After I download the firmware, windows begins to install driver for new device, but it fails, cy cosole displays nothong. If I modify the product ID to equal to that of a FX2LP based device developed previously, cy consolel recoganises it as a FX2LP device. How to explain these?

[SrinathS_16 · Accepted solution]

Hello,

This is an expected behavior. When the CYUSB3 driver is installed on the PC, the system remembers the driver information. The CYUSB3.INF file has the VID/PID combinations defined by Cypress. When any of these VID/PID is used in the firmware, the CYUSB3 driver gets automatically loaded. When a VID/PID other than the ones in the CYUSB3.INF file is used, the system does not find a suitable driver and hence displays the device under 'Unknown Devices' section in the device manager. The device then needs to be manually bound to the corresponding driver.

Best regards,

Srinath S

[MaXi_1246331]

Thank you. the question is perfectly answered.