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TMS320F28377S: power-up sequence

Part Number: TMS320F28377S


Tool/software:

We are currently experiencing a situation where the 1.2V power supply is short circuited to ground after being powered on, or the impedance of the 1.2V power supply pin to ground is less than 60 ohms; The system is not working properly. Please refer to the upper waveform diagram. Is it related to the power on sequence? At present, 3.3V is powered on first, but 1.2V is stabilized first; Please provide suggestions for the current malfunction;