S32K312: WKUP Interrupt Not Triggering

DiaDev — Tue, 07 Jul 2026 09:55:19 GMT

I have configured PTB2 as the WKUP input pin, and WKUP Channel 8 is mapped to PTB2. The WKUP module configuration appears to be correct; however, the WKUP interrupt is not being triggered.

Previously, I configured the same pin as an EIRQ input, and the interrupt was triggered successfully, confirming that the pin and external signal are functioning correctly.

Issue:

PTB2 configured as WKUP input.
WKUP Channel 8 mapped to PTB2.
No WKUP interrupt is received.
The same hardware setup works correctly with EIRQ configuration.

Please help identify if there are any additional WKUP configuration requirements, dependencies, or known limitations that could prevent the interrupt from being generated.

Wkpu_Ip_Init(0U, &Wkpu_Ip_Config_PB);

/* INT2: Wakeup Trigger. */

Wkpu_Ip_EnableInterrupt(0, Wkpu_Ip_ChannelConfig_PB[2U].hwChannel);

Wkpu_Ip_EnableNotification(Wkpu_Ip_ChannelConfig_PB[2U].hwChannel);

Re: S32K312: WKUP Interrupt Not Triggering

Julián_AragónM — Tue, 07 Jul 2026 17:04:59 GMT

Hi @DiaDev,

S32K3, added to the ~60 external wake-ups, also provides 4 internal wake-up sources, which must be taken into consideration when configuring a channel; this means, adding +4 as offset:

PTB2 is the wake-up pad [8], plus the four internal sources, it will be the channel 12. Please change this configuration and test out if WKPU is triggered or not.

Best regards,
Julián

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S32K312: WKUP Interrupt Not Triggering

Re: S32K312: WKUP Interrupt Not Triggering