nrf52832 sleep current consumption with accelerometer

[Oliviertl]

Hi,

we recently moved from the nrf52 DK to a custom board. We went from 2uA current consumption in sleep to 500uA with the custom board. The main difference is that the custom board has an accelerometer (Bosch bma280).

It is connected this way:

VDD of bma280 -> P0.18
Interrupt1 of bma280 -> P0.11
Interrupt2 of bma280 -> P0.12
SDx -> P0.13
SCx -> P0.14

My question is : We think that the nrf52832 draws current from the gpios. Can we configure those pins so that no or less current is drawn ?

Here is what it looks like:

[Dave_couling]

You need to alter the sample rate of the Accelerometer and put it in low-power mode to get your current consumption down.

[Keton]

Also remember to disable TWI peripheral before sleep. And mind the PAN89: "TWI: Static 400 µA current while using GPIOTE"

[Oliviertl]

Thank you !!!