RE: Shockburst; power consumption in deep sleep

Svein — Thu, 25 Aug 2022 07:23:50 GMT

Hi Kenneth,

Thank you very much for the quick and clarifying answer. Regarding power consumption, you were right that it was a GPIO that drew power. Had just completely forgotten that our design had a GPIO that behaved the opposite of what all the other GPIOs do :-O (I am testing SB on a custom board designed for BLE 5.x)

BR, Svein

RE: Shockburst; power consumption in deep sleep

Kenneth — Mon, 22 Aug 2022 07:06:35 GMT

Hi,

You can find the intention behing the recover_state() in the documentation for the ESB example:
https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/esb_examples_low_power_ptx_prx.html

I don't have a good explaination directly why you don't achieve sub uA when going to system OFF, it's either some current though a GPIO and/or something related to the RAM retention I can see is done before calling NRF_POWER->SYSTEMOFF = 0x1.

Maybe you are able (for test) to move NRF_POWER->SYSTEMOFF = 0x1; straight after gpio_init() for comparison?

Kenneth