Should I manually disable peripherals to minimize power consumption?

[kilianod]

Hello

Quick question. With the nRF51, When in System On mode, should I manually disable peripherals to minimize power even if I'm not using the peripheral in question?

For example, if I'm not using the SPI0 peripheral, should I disable it with "NRF_SPI0->POWER = 0;" during start-up? And should I do this for every single peripheral I am not using or is there any point?

Thanks

[Stefan Birnir Sverrisson]

Hi

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;

[kilianod]

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

[Gavin]

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;