Power consumption after TWI transmition

[alex199393]

Hello.

I use nRF52832 with SoftDevice and several TWI-connected IC's.

The power consumtion of nRF52832 is 14 uA after TWI initialization (low power mode and DC-DC regulator are used). And it's OK. 

But after a first transmition the power consumtion increase up to 287 uA and remains constant until reboot.

I assume that some interrupt or event flags are not cleared after the transmition. In the debug-mode I saw that no "Event BB" is cleared, but writing 0 to the "Event BB" register did not solve the problem.

Tell me, please, what else should I pay attention to?

[Jørgen Holmefjord]

Hi,

Do you uninitialize the TWI instance after you are done transmitting?

Can you check if the workaround from this errata will resolve the issue? [89] GPIOTE: Static 400 µA current while using GPIOTE

Note that you have to reconfigure the TWIM peripheral before doing a new transfer after applying this workaround.

Best regards,
Jørgen