"nRESET" pull-up setting

RE: "nRESET" pull-up setting

takashina hiroki — Wed, 02 Oct 2019 13:20:11 GMT

Thank you for answering.
I understood it.

RE: "nRESET" pull-up setting

bjorn-spockeli — Wed, 02 Oct 2019 08:37:27 GMT

This is not possible. When you configure pin 21 as nRESET, then the pull-up is automatically enabled and cannot be set to no-pull.

RE: "nRESET" pull-up setting

takashina hiroki — Wed, 02 Oct 2019 08:20:45 GMT

It is used as a reset function instead of GPIO.
I want to set it without pull-up.

RE: "nRESET" pull-up setting

bjorn-spockeli — Wed, 02 Oct 2019 07:55:49 GMT

Hi Hiroki-san,

do you want to use the nRESET pin as a regular GPIO(i.e. no pin reset functionality) or do you want the nRESET pin( pin 21) to have the reset functionality exposed, but with the internal pullup disabled?

Best regards

Bjørn

RE: "nRESET" pull-up setting

takashina hiroki — Wed, 02 Oct 2019 06:09:18 GMT

I added the following code as a test.
However, it does not become a setting without pull-up.

nrf_gpio_pin_dir_set(21, NRF_GPIO_PIN_DIR_INPUT	);
nrf_gpio_cfg_input(21, NRF_GPIO_PIN_NOPULL );