Increase in current consumption by GPIOTE

[Daichi]

Hi devzone,

I'm using translation.

I use nRF52840.
I created a firmware like the attached one based on the SDK15.3\examples\peripheral\bie_peripheral\ble_app_blinky.

When this is written to the DK board, P1.05 becomes about 200uA when it is shorted to GND, and about 5uA when it is released.
This is to be expected.

However, when writing it to a custom board, it is about 5uA before shorting, but when shorting it is about 9mA and does not change.

I use WLCSP on my custom boards.

Writing to a board that uses aQFN73 with exactly the same circuit configuration as this custom board will have the same current transition as the DK board.

There are several samples of WLCSP custom boards, but all of them become 9mA.

This is also true even if I change the port that is set as GPIOTE.

Do you know what's going on?

Best regards.

ble_app_blinky_GPIOTEtest.zip

[Marjeris Romero]

Hi,

There should not be any difference between aQFN and WLCSP in this matter. 9mA is a lot. 

The problem is only with the custom board right? Could you share the schematics of your custom board with us?

You should also double check which pin you are shorting, and check that you are not shorting VDD, DECx or anything else.

There could also be a short between some of the balls in the WLCSP package.You can also try to change to another GPIO pin a measure again?

Best regards,

Marjeris