S32K3xx: Standby Mode & Wake Pin Query

[tecprasant]

Hi,

I have a query regarding the S32K3xx (specifically) for S32K312 controllers.

In Standby mode, I would like to wake up the controller using an external GPIO signal. I am planning to use the WAKE Pins for this purpose.

As per the S32K3 Datasheet, there are 3 standby modes of the S32K3xx:
1) Standby with All OFF
2) Standby with SIRC ON
3) Standby with FIRC ON

I have the following queries (wrt S32K312) :
Q1) How does the controller come out of the standby mode in the case of "Standby with All OFF" mode.
Q2) Can I use the "Standby with SIRC ON" mode if I want the controller to come out of standby using external Wake pins?

Any inputs on the above queries will be of help.

Thanks in advance!

[Julián_AragónM]

Hi @tecprasant,

Q1) After Standby mode exit, the following events occur:
1.A wake-up event arrives.
2.FIRC starts powering up (if disabled in Standby mode).
3.PMC starts the transition process to FPM (for example, enables the last-mile regulator and provides V11_RUN supply to the chip).
4.MC_PCU removes the isolation between Run and Standby domains.
5.Run domain reset deasserts (asserts on Standby mode entry) and the chip undergoes a functional reset exit sequence for this domain.
6.The chip enters Run mode of operation.

Q2) Yes.You can use the S32K3 Low Power Management AN and demos for reference. Please keep in mind they are based in S32DS 3.4 and RTD 2.0.0.

Best regards,
Julián