Customer use 3.3V to supply MPC5643L VDD_HV_IO/VDD_HV_ADV, and internal regulator based on 3.3V to supply VDD_LV.
And customer us 5.0V to supply VDD_HV_ADR.
The problem here is that if we supply 3.3V first, then after a while, turn on 5V for VDD_HV_ADR manually, the MCU looks not working.
Do we have any requirement on power up sequence? And what's the max allowed delay between VDD_HV/VDD_LV and VDD_HV_ADR?