TX1 HANG UP when the power input (12V) drops

Confirmation method:
The serial console becomes unresponsive.


1.bmp (279.7 KB)

What is the reason for TX1 HANGUP?

Hi, please provide more detail info. Like is this on devkit or custom design? Is the board normal before? How long have you used it? What operation have you done to trigger this? Is there any component on board broken? If possible, have you probed the UART port to observe the signals?

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