RE: UARTE power consumption

Vidar Berg — Fri, 25 Nov 2022 09:04:37 GMT

Thanks for the update. As you mentioned, to get the lowest power consumption, you must disable the peripheral. However, before disabling it you should wait for the receiver timeout as noted in the UARTE chapter here: Low power, and I'm not sure if your 50 us delay will be sufficient to cover all scenarios. It would be safer if you waited for the EVENTS_RXTO event to be raised before you triggered the disable task.

E.g.

nrf_uarte_event_clear(peripheral, NRF_UARTE_EVENT_RXTO);
nrf_uarte_task_trigger(peripheral, NRF_UARTE_TASK_STOPRX);

while (!nrf_uarte_event_check(peripheral, NRF_UARTE_EVENT_RXTO))
{}

nrf_uarte_disable(peripheral);

RE: UARTE power consumption

Lecram69 — Thu, 24 Nov 2022 15:47:48 GMT

Solved.

nrf_uarte_task_trigger(peripheral, NRF_UARTE_TASK_STOPRX);
wait_us(50);
nrf_uarte_disable(peripheral);

didnt end the RX UARTE peripheral properly. Only a

nrf_uarte_task_trigger(peripheral, NRF_UARTE_TASK_STOPRX);

let the nRF run at 25uA. Dunno