[nRF5340] Configure P0.00 & P1.01 as gpio

RE: [nRF5340] Configure P0.00 & P1.01 as gpio

Raoul — Thu, 29 Jun 2023 21:18:13 GMT

Hi!

Sorry for my late reply, I have been on vacation for the past two weeks.

Thanks for letting me know. Yes, power consumption should improve with the use of an external crystal for the LF clock. There is a great answer by my colleague (from 7 years ago, but still relevant) that covers the reasons for this: RE: How much current consumption when we use internal 32k RC ?

Best regards,

Raoul

RE: [nRF5340] Configure P0.00 & P1.01 as gpio

bckim — Wed, 21 Jun 2023 02:22:26 GMT

Hello Raoul,

Sorry for the late reply.

Due to the current consumption problem, we decided to use P0.00 and P0.01 by connecting an external crystal as before.

Thanks for reporting this issue.

Kind regards,
bckim

RE: [nRF5340] Configure P0.00 & P1.01 as gpio

Raoul — Thu, 08 Jun 2023 21:20:20 GMT

I see, thanks.

And could you confirm for me which steps you've done so far?

Are you working with a Development Kit, or a custom board? If you're using a DK, have you cut SB1 and SB2, and closed/soldered/bridged SB3 and SB4? See Solder bridge configuration.

Which of the recommended Kconfig options did you set?

It's not entirely clear, but I think your prj.conf should look like this:

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n
CONFIG_SOC_ENABLE_LFXO=n

And as far as I know this should be the case both for your cpuapp and your cpunet application.

Try that, and let me know how it goes.

Edit: I'm not sure if you're using TF-M, but I see that there's been a similar case recently, where my colleague has suggested a workaround for that case:RE: Configuring PIN 0.00 and P0.01 as GPIO

Best regards,

Raoul

RE: [nRF5340] Configure P0.00 & P1.01 as gpio

bckim — Wed, 07 Jun 2023 09:12:15 GMT

Hello Raoul,

There are many peripherals to control, so I am trying to use p0.00 and p0.01 as general gpios because gpio is not enough.

Kind regards,
bckim

RE: [nRF5340] Configure P0.00 & P1.01 as gpio

Raoul — Sun, 04 Jun 2023 17:38:23 GMT

Hi,

Just to confirm, could you list the steps you have performed so far (from the links you posted)?

And to make sure we are solving the right problem, could you tell me why you need to use P0.00 and P0.01 rather than other pins?

Thanks!

Best regards,

Raoul