Sleep current with GPIOTE enabled

RE: Sleep current with GPIOTE enabled

Joe — Thu, 18 May 2017 20:12:27 GMT

Hi Sigurd, the change you suggested indeed give me a similar result as yours. Thanks!

RE: Sleep current with GPIOTE enabled

Sigurd — Thu, 18 May 2017 15:01:38 GMT

By setting the flag to false in the example, I'm measuring the average current to be ~ 1.2 µA in System ON sleep mode.

RE: Sleep current with GPIOTE enabled

Sigurd — Thu, 18 May 2017 14:57:51 GMT

Hi,

The example uses high accuracy mode which generates an IN event on the selected pin in the GPIOTE module directly. This uses more current than compared to using a GPIOTE->PORT event (low accuracy mode). For low power applications, you should use the GPIOTE->PORT event.

You can set the GPIOTE module to low accuracy mode by calling the GPIOTE_CONFIG_IN_SENSE_TOGGLE() function with the .hi_accuracy flag set to false. (See line 90 in the example) :

nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(false);