S32K3 STANDBY MODE

[Jon123]

Chip: S32K3 series.
Phenomenon: now test pin PTA29, connect pull-down resistance, before hibernation, open pin hold, test pin level, high level; after sleep, test pin level, high level; test pin level, low level after waking up before pin initialization.
Check the register and find that after waking up, the pin hold register has been cleared, that is, off the pin hold. Now you want to keep the pin high after waking up. How to configure it?thank you.

[danielmartynek]

Hi @Jon123,

Refer to the document in S32K3_low_power_management.zip

https://community.nxp.com/t5/S32K-Knowledge-Base/S32K3-Low-Power-Management-AN-and-demos/ta-p/152772...

Chapter 7. Pad keeping in Standby mode

Regards,

Daniel

[Jon123]

Maybe my question is expressed incorrectly, I'm sorry, I mean I can keep the pin in the pin state under standby mode, and I found that when the chip is awakened, the pin hold register will be cleared, but I hope that when the chip wakes up, the pin hold state is still on hold state, can this situation be realized?

[danielmartynek]

Hi @Jon123,

The MCU goes through a system reset when the MCU exits the Standby mode.

The registers will always be cleared to their specified reset values.

Regards,

Daniel