Should I manually disable peripherals to minimize power consumption?

RE: Should I manually disable peripherals to minimize power consumption?

Gavin — Tue, 22 Sep 2015 22:13:36 GMT

Having searched the forum endlessly for an answer to the question 'how do I shut down peripherals and turn off HFCLK before going into SYSTEM ON' and found lots of answers that dodge the central question, I think this is a really important answer and would vote you up multiple times if I was allowed!

For the benefit of others stumbling across this - if you've been using TWI you can turn it off with NRF_TWI0->ENABLE=0; and NRF_TWI1->ENABLE=0;

RE: Should I manually disable peripherals to minimize power consumption?

kilianod — Thu, 30 Apr 2015 21:25:25 GMT

Thanks. Disabling the TWI and SPI made a massive difference to my current consumption even though I wasn't even using them!

RE: Should I manually disable peripherals to minimize power consumption?

Stefan Birnir Sverrisson — Thu, 30 Apr 2015 10:41:57 GMT

There is something about how to enable and disable peripherals to save power in the current consumption guide in the "Setup of SPI, UART, TWI interfaces" section

E.g. the SPI0 peripheral is disabled with:

NRF_SPI0->ENABLE = 0;

and enabled with:

NRF_SPI0->ENABLE = 1;