Run current/resources with GPIOTE Event nRF52

RE: Run current/resources with GPIOTE Event nRF52

nrf52 — Wed, 07 Sep 2016 01:02:06 GMT

Thanks Stefan.

RE: Run current/resources with GPIOTE Event nRF52

Stefan Birnir Sverrisson — Tue, 06 Sep 2016 15:02:36 GMT

GPIOTE handles GPIO interrupts. If your application is very current sensitive, then it is better to use GPIOTE PORT event. When you configure low power button in the nrf_drv_gpiote driver you are using GPIOTE PORT event in the background. It has the same functionality as the GPIOTE IN, but the limitation is if two pins are asserted within the same ~10us, then only the first pin is detected. Similarly, if the same pin is asserted twice within the same ~10us, then only one assert is detected. When using softdevice, the ~10us may increase to ~500us. So if you do not need to detect two or more GPIO interrupts within the same ~10us/~500ms, then it is fine to configure low power GPIO interrupt.

RE: Run current/resources with GPIOTE Event nRF52

nrf52 — Mon, 05 Sep 2016 12:08:39 GMT

Hi Stefan , is it possible to disable GPIOE when using GPIO interrupt? If yes ,where is the example link , if not , it is bad for nrf52 ,it will eat 8uA when GPIO interrupt open

RE: Run current/resources with GPIOTE Event nRF52

Stefan Birnir Sverrisson — Mon, 05 Sep 2016 11:25:32 GMT

I dont think there is a workaround. We cant make GPIOTE IN consume less than ~8uA. GPIOTE PORT event still consumes <<1uA. I suspect that the PS data will be updated to reflect this.

RE: Run current/resources with GPIOTE Event nRF52

nrf52 — Sat, 03 Sep 2016 09:29:43 GMT

Stefan, is there any update for the 8uA current, how to work around the issue

RE: Run current/resources with GPIOTE Event nRF52

Stefan Birnir Sverrisson — Mon, 04 Jul 2016 15:37:50 GMT

Hi RK

From my measurement, it seems that GPIOTE IN adds ~8uA to the current consumption when enabled. That is a whole lot better than the nRF51, but still not as specified in the nRF52832 PS. Ill update this thread when I have more information on what internal resources are used when GPIOTE IN is enabled.