topic Re: S32K3 Sleep Wake in S32K

S32K3 Sleep Wake

Niuyanlin — Sat, 01 Apr 2023 11:59:48 GMT

hello

NXP team:

Test results: RTC, PIT0_ RTI When is used as a wake-up source, the rising edge detection is set here to enable Icu_ EnableEdgeDetection(), can I wake up normally, but why doesn't the falling edge work? I hope to receive your help in a timely manner.

Re: S32K3 Sleep Wake

VaneB — Mon, 03 Apr 2023 22:19:49 GMT

Hi @Niuyanlin

As you can see in the diagram below, the IRQ active edge is controlled by users through the settings of the WIREER and WIFEER registers.

Could you check if these registers are configured correctly?

B.R.

VaneB

Re: S32K3 Sleep Wake

Niuyanlin — Tue, 04 Apr 2023 00:59:41 GMT

Hi .@VaneB
Firstly, thank you very much for your reply. I have checked that these registers are configured correctly. I would like to know how the rising and falling edges of these four internal awakening sources are generated.

Re: S32K3 Sleep Wake

VaneB — Wed, 05 Apr 2023 21:12:27 GMT

Hi @Niuyanlin

The diagram shared before generalizes how the wake-up sources are connected.

So I am going to board this behavior through the theoretical functionality. As the RTI is a dedicated timer of the PIT. The interrupt is set to 1 at the end of the timer period (at the rising edge).

Because of this, it makes sense that edge detection does not work at the falling edge.