NRF52840 GPIO 41 Drawing 140 uA when configured as input with PULLUP

RE: NRF52840 GPIO 41 Drawing 140 uA when configured as input with PULLUP

jthmp — Fri, 11 Jul 2025 00:17:53 GMT

So, it looks like this was a HW issue on our end and has since been resolved.

Thank you for your help.

RE: NRF52840 GPIO 41 Drawing 140 uA when configured as input with PULLUP

jthmp — Thu, 10 Jul 2025 18:25:56 GMT

Hi, also based on my example code it looks like we are using the PORT EVENT code
nrfx_gpiote_in_config_t in_config = NRFX_GPIOTE_CONFIG_IN_SENSE_TOGGLE(false);

So, HFINT isn't enabled. Unless I got this backwards?

Can you clarify?

RE: NRF52840 GPIO 41 Drawing 140 uA when configured as input with PULLUP

jthmp — Thu, 10 Jul 2025 18:02:08 GMT

From the BL654 data sheet

SIO_41 (BL654) = R1 (NRF52840 QFN Pin) = P1.09 (NRF52480 QFN Name)

RE: NRF52840 GPIO 41 Drawing 140 uA when configured as input with PULLUP

Simonr — Thu, 10 Jul 2025 12:01:55 GMT

Can you confirm that GPIO 41 here is referring to P0.28 on the nRF52840 QFN48 package, or does the BL654 have a different GPIO naming convention? Regarding the port event, the GPIOTE documentation describes how to change this here, and we have multiple other tickets on the DevZone where this has been discussed in the past.

Best regards,

Simon

RE: NRF52840 GPIO 41 Drawing 140 uA when configured as input with PULLUP

jthmp — Wed, 09 Jul 2025 18:17:59 GMT

Hi, ok but it looks like even when I do this (not using events or triggers) I still get the issue

Also, some tests show that even using NOPULLUP results in 140 uA current draw

Can you provide an example of using the "port event" option?
Thank you!

if (!nrfx_gpiote_is_init())
{
ASSERT(0 == nrfx_gpiote_init());
}
nrf_gpio_cfg_input(41u, NRF_GPIO_PIN_PULLUP);

RE: NRF52840 GPIO 41 Drawing 140 uA when configured as input with PULLUP

Turbo J — Wed, 09 Jul 2025 17:55:24 GMT

GPIOTE IN event (edge triggers) require HFINT running in order to work. That is where the additional current goes into.

Consider using a level trigger ("port event") if you wanted lowest consumtion.