I configure ADR/FAULT as output to see if the chip is overvoltage or undervoltage. When I input 3.3V AVDD to the chip, ADR/FAULT displays as 1, and the chip is working normally, but when I input PVDD After 12V, ADR/FAULT has been switched between 0 and 1. Is this normal or an undervoltage and overvoltage fault has occurred? The PVDD input is 12V/200mA.
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