Current consumption >1 mA changing LFCLKSRC

RE: Current consumption >1 mA changing LFCLKSRC

Frederic — Wed, 11 Mar 2015 16:32:07 GMT

Thanks for help, works great :-)

RE: Current consumption >1 mA changing LFCLKSRC

Hung Bui — Wed, 11 Mar 2015 15:23:06 GMT

@Frederic: No it's not fixed on the S310. But the same workaround can be used for S310.

RE: Current consumption >1 mA changing LFCLKSRC

Frederic — Tue, 10 Mar 2015 16:09:57 GMT

ok, thank you i will try this solution. At the moment i use the lastest version from S310 V2.0.1. So i think there is no S310 availbale with bugfix.

RE: Current consumption >1 mA changing LFCLKSRC

Hung Bui — Tue, 10 Mar 2015 15:55:41 GMT

Hi Frederic,

It's a bug we found in S110 v7.x and earlier. The bug is fixed and documented in our S110 v8.0 release note.

If you want to continue to use S110 v7.x and earlier, the work around is to call

NRF_POWER->TASKS_LOWPWR = 1;

after you disable the softdevice in the bootloader or before you start the softdevice in the application.

RE: Current consumption >1 mA changing LFCLKSRC

Frederic — Tue, 10 Mar 2015 09:00:05 GMT

In documentation i found the following description:

@note Some care must be taken if a low frequency clock source is already running when calling this function: If the LF clock has a different source then the one currently running, it will be stopped. Then, the new clock source will be started.

@param clock_source Low frequency clock source and accuracy. (Note: In the case of XTAL source, the PPM accuracy of the chosen clock source must be greater than or equal to the actual characteristics of your XTAL clock).

But why the current consumption only increase if i do a power on cycle? Can i stop the LFCLK manually before call SOFTDEVICE_HANDLER_INIT(...)?