topic Re: KEAZ64 can't enter into stop mode while DIO pin and CLK pin disabled in Kinetis Microcontrollers

KEAZ64 can't enter into stop mode while DIO pin and CLK pin disabled

Wangerxi — Fri, 05 Nov 2021 00:54:27 GMT

As the subject, KEAZ64 enter into stop mode succeed every time, however it doesn't work while DIO pin and CLK pin disabled.

Re: KEAZ64 can't enter into stop mode while DIO pin and CLK pin disabled

Robin_Shen — Fri, 05 Nov 2021 08:04:29 GMT

Hi Wangerxi,

Did you disable SWD function by cleasr the SWDE of SIM_SOPT0?
SIM_SOPT0 &= ~SIM_SOPT0_SWDE_MASK;

How did you know the MCU didn't enter into stop mode?
If you are judging based on the measured current, then please refer the discussion in how to achieve the KEA128 lowest static current in STOP mode

Best Regards,
Robin
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Re: KEAZ64 can't enter into stop mode while DIO pin and CLK pin disabled

Wangerxi — Fri, 05 Nov 2021 08:43:13 GMT

Hi Robin，

Thanks for your reply, I disable SWD function by config PE and judge based on the measured current.

Erxi

Re: KEAZ64 can't enter into stop mode while DIO pin and CLK pin disabled

Robin_Shen — Tue, 09 Nov 2021 08:48:20 GMT

Have you tested the project in that discussion? Add that code can still enter STOP mode.
The hardware that needs to be changed on the development board is also mentioned there.

Re: KEAZ64 can't enter into stop mode while DIO pin and CLK pin disabled

Wangerxi — Wed, 10 Nov 2021 00:35:48 GMT

Hi Robin

I tested my own board,not development board.

Re: KEAZ64 can't enter into stop mode while DIO pin and CLK pin disabled

Robin_Shen — Thu, 11 Nov 2021 06:50:09 GMT

That example does not use other peripherals, just puts the MCU into STOP mode.(So I think you can test it on your custom board)
You need to refer to the points of attention in that discussion and check whether your external circuit has any part that affects power consumption.

Avoid some bad case:

Re: KEAZ64 can't enter into stop mode while DIO pin and CLK pin disabled

Wangerxi — Sat, 13 Nov 2021 03:42:48 GMT

Hi Robin,

Thanks for your help, I will check it based on your advice.