S32K344电源上下电时序要求

[liyongfeng]

请问S32K3对V15与VDD_HV_A(B)之间给电/断电的时序有什么要求吗？如果违反会造成什么故障现象？

[PavelL]

Hi,

There is no power sequence required for the S32K3. Rather an MCU Power Supply Ramp rate consideration. From the S32K3 hardware design guidelines:

2.10.1 MCU Power Supply Ramp rate
In the S32K3XX datasheet, there is a parameter called "MCU supply ramp rate" with a maximum and a minimum limit. During the power-on of MCU, the power supply must assure a ramp-rate within this range from VDD_OFF=0.1V to the voltage operating level of VDD_HV_A, VDD_HV_B and V15. The outcome of violating the specification causes unexpected behavior, stuck operation or damage in the MCU.

Best Regards,

Pavel