Query regarding Peripheral(SPI/TWI) with Easy DMA and peripheral power consumption.

[AbhaySingh]

Hi,

I working on nrf52840 DK with nrf5 SDK17.

I tried to find out the power consumption of the peripheral(TWI/SPI) from the nrf52840 PS v1.7 document but it is not mentioned in it.

So please let me know the power consumption of these peripherals.

And for low power applications using DMA with peripheral is recommended or not, because DMA itself consumes about  1mA if I am not wrong.

But using DMA will keep CPU unoccupied which means low power consumption.

Looking for the answers.

Thanks 

Abhay

[Priyanka]

Hi Abhay,

The current consumption for the TWIM and SPIM are 50uA.

If you are using this with the DMA, then the total consumption would be around 50uA + 1.5mA (DMA). But in case you are using other peripherals, that would also add up. So it depends on your power needs. You could take a look at the current consumption of all the peripherals from their Product Specification and make an estimate.

Regards,

Priyanka

[AbhaySingh]

Thanks Priyanka for the prompt reply.