S32K312 Wake UP

ZZZZZJH — Mon, 28 Jul 2025 10:38:52 GMT

Hello, supporters of NXP. I would like to inquire whether the S32K312 can achieve low-power wake-up through the S32DS configuration of LLD. Is the wake-up method configured through the GPIO input pin and the WKPU pin the same? Is there any routine provided for the wake-up method configured through the WKPU pin? Thank you.

Re: S32K312 Wake UP

Julián_AragónM — Tue, 29 Jul 2025 18:39:03 GMT

Hi @ZZZZZJH

Is the wake-up method configured through the GPIO input pin and the WKPU pin the same?

I'm not sure I understand this question but let me try to clear it up. The WKPU instance shares functionality with the other pins, using a MUX. This means that any GPIO pin can be used as wake up source as long as it has a WKPU interrupt assigned (check S32K_IOMUX.xlsx file attached to S32K3 reference manual for full pinout confirmation).

You can find a GPIO WKPU routine for the S32K312 in both LLD and HLD in this community post: [RTD400 & 500 MCAL & IP] S32K3 Low Power Management AN and demos - NXP Community.

They are based in RTD 5.0.0 & S32DS 3.5/3.6. Hope this helps.

Best regards,
Julián

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