2021-11-10 11:56 PM
The STM32H750 USB function was okay when it left the factory because FW update had been test in the factory. Total is 300 pcs. Recently we fond 1 pcs is abnormal. It shows the following information when pluggin in the USB. Is it hardware issue? Could you suggest how to analysis this issue?
USB Device Connected
USB Device Reset Completed
ERROR: Control error: Device not responding
USB Device Connected
USB Device Reset Completed
ERROR: Control error: Device not responding
USB Device Connected
USB Device Reset Completed
ERROR: Control error: Device not responding
USB Device Connected
USB Device Reset Completed
ERROR: Control error: Device not responding
USB Device Connected
USB Device Reset Completed
ERROR: Control error: Device not responding
USB Device Connected
USB Device Reset Completed
ERROR: Control error: Device not responding
USB Device Connected
USB Device Reset Completed
ERROR: Control error: Device not responding
Here is the schematic related to USB for reference.
2021-11-11 01:02 AM
Suspect a hardware failure. Carefully visual inspect the board. Maybe a cold solder joint.