nrf52832 Higher current consumption in sleep mode

RE: nrf52832 Higher current consumption in sleep mode

Stian Røed Hafskjold — Wed, 04 Jul 2018 10:05:10 GMT

No, the LFRC does not consume that much current.

Did you put NRF_POWER->SYSTEMOFF = 1; in top of main before initializing anything else?

Did you make sure the debugger was disconnected before doing measurements?

Can you also describe your measurement setup please

RE: nrf52832 Higher current consumption in sleep mode

kvskt — Thu, 28 Jun 2018 07:12:03 GMT

Is there be any possibility of such high current consumption due to the use of internal RC oscillator as LF_SRC. Since am configuring clock with internal RC oscillator in BL652 Laird module.

Thanks

RE: nrf52832 Higher current consumption in sleep mode

kvskt — Thu, 28 Jun 2018 07:08:29 GMT

PFA schematic of the BL653 board.devzone.nordicsemi.com/.../BLE_5F00_SCHEMATIC_2C00_.pdf

RE: nrf52832 Higher current consumption in sleep mode

Stian Røed Hafskjold — Tue, 26 Jun 2018 13:17:01 GMT

Can you please post the schematics of you custom board? If you set the nRF chip to System off, the current consumption is about 300nA, so then it has to be some external components. Thanks

RE: nrf52832 Higher current consumption in sleep mode

kvskt — Tue, 26 Jun 2018 07:48:34 GMT

Am using my own custom board.

Yes NRF_LOG_ENABLED is set to 0.

cross verified the board. No GPIO's configured with pull ups.

when using NRF_POWER->SYSTEMOFF = 1 , the same amount of current ~130uA is consuming.

UPDATE: Am using BL652 Laird module which has nrf52832. sorry for missing this information while posting the question.

RE: nrf52832 Higher current consumption in sleep mode

Stian Røed Hafskjold — Mon, 25 Jun 2018 15:00:34 GMT

Can you check if logging is disabled: Go to sdk_config.h and check if NRF_LOG_ENABLED is set to 0.

Are you using the development kit or your own hardware?

Are some of the GPIOs configured with pull-ups, maybe from the bsd module or similar?

What happens if you just put the device to sleep without initializing anything? NRF_POWER->SYSTEMOFF = 1; in top of main.