Power removal on nRF52832 chip.

RE: Power removal on nRF52832 chip.

EmanuelePozziNordic — Fri, 30 Aug 2019 07:55:38 GMT

Hi SImon,

grat news !

Thanks

Best regards

Emanuele

RE: Power removal on nRF52832 chip.

Simonr — Fri, 30 Aug 2019 07:43:20 GMT

Hi Emanuele

We had some issues like this early on with the nRF51 series, but I believe this was fixed in the later revisions of that chip. None of the nRF52 series chips should have any problems with the flash being corrupted due to a power outage while doing flash operations, or any other operations for that matter.

Best regards,

Simon

RE: Power removal on nRF52832 chip.

EmanuelePozziNordic — Thu, 29 Aug 2019 13:38:21 GMT

Hi Simon,

thanks for you reply.

My main point was on corruption of data saved in MCU internal flash. I try to better explain.

During a piaring some data are saved in the flash (by the stack i suppose),if we remove the power during the writing in the flash the flash can be corrupted at next restart (data partially saved, crc mismatch)

I suppose that these data aree saved/managed by the BLE stack (softdevice), is this correct ?

At restart, the device will find unconsistend data, what happen ?

We have an error and we can anyway recover the situation, are API availble ?

Thanks in advance

Best regars

Emanuele

RE: Power removal on nRF52832 chip.

Simonr — Wed, 28 Aug 2019 09:36:42 GMT

Hi Emanuele

Due to the Power on reset and the Brownout reset, the device will always be reset in a safe state. A reset, at any point, will not be able to brick the chip/ cause an unrecoverable error as you describe.

Please also read up on the Power supply supervisor for more info.

Best regards,

Simon