Associate III

Question

STM32H750 USB fail, fail rate 1/300

Forum|Forum|4 years ago
November 11, 2021
1 reply
1367 views

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.

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Chief

Suspect a hardware failure. Carefully visual inspect the board. Maybe a cold solder joint.