S32K144 Can·t go to sleep

[ChenPeng3]

Hi:

      When I was using the power management module to put the MCU into sleep, I found that when I turned on the ADC module, or used UART_SendDataBlockinig, the mcu can`t go to sleep.

The attachment is my project, I hope to get your help。

 IDE:S32DS

SDK：RTM4.01

[ChenPeng3]

Hi,@Senlent:

    when call POWER_SYS_SetMode(STOP1, POWER_MANAGER_POLICY_AGREEMENT);

mcu should stop in standby, but lpuart send "Core frequency" message.you can connect PB13 to VCC or GND, if mcu go to sleep, lpuart should`t have message.

thank you

[Senlent]

Hi@Chenpeng3

You are right, the picture is the result of my attempt to use PTB13 wake-up test.
In fact, I tested your demo and after entering STOP1 mode（connect PTB13 to ground, make sure the wake up pin is in a stable state）, the LPUART module does not output anything.

[ChenPeng3]

Hi@Senlent:

           Thank you for your reply, I tried again without debugging and found that the result was correct.but I couldn't get into STOP1 mode when I connected the emulator.This problem is still solved, thank you。

[Senlent · Accepted solution]

Hi@ChenPeng3

This is expected, you should disconnect the debugger before MCU into any low power mode.

[Senlent]

Hi@ChenPeng3

I have tested your project and it works fine on myside.

(I have connect PTB13 to ground.)