S32K324 Low power mode

[witness248]

hi, experts

we are working on NXP S32K324 and SBC FS6513, and there is wake up requirement from customer, that is when the wake up source is valid(such as the pwm duty is normal range), and lasts a certain period(like 500ms), then the MCU should be waken up. so there are two possible solutions.

1) add extra one microchip which will constantly detect the wake up source,  if the condition fulfilled, it will pull SBC wake up IO, then SBC will wake MCU.

2) I want to know if NXP S32K324 features the low power mode, similar with infineon SCR(standby controller) mode, which can also detect the wake up source, and wake up main core once wake up condition hit.

any other suggestion, looking forward to your reply.

[petervlna]

Hello,

You can wake up the micro on the on following events:

But there is no signal timer with comparator to sense wakeup signal for 500ms and then trigger wake up.

What I see as an possibility is that uC will wakeup on signal edge, it will start some SW counter and after that it will check if the signal is still present on the pin, then starts full operation of SW.

But wakeup on external signal is always on the edge change.

Best regards,

Peter

[witness248]

hi, peter

Thanks for your kink reply, so as you said, I think uc will be waken up periodically with invalid wake up source with its duty cycle 2% or 98%(normal pwm range 3%~97%). therefore, this method can not meet the requirement due to the power consumption.