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Have I damaged my nRF52832 Dev Kit?

Rick

I have been analyzing the current consumption of my nRF52832 dev kit today using both a multi meter and an oscilloscope with a resistor. I'm not sure what I exactly did that lead to this, but now my board constantly uses 80mA. It can still be programmed and it does seem to run. Did my board get damaged somehow? If so, can it still be fixed?

Edit: What could have happened is that the dev kit was powered for a short time without a jumper on P22 (also no short on SB9 nor resistor on R6). Not sure what this could do to the board.

Edit2: The issue was temporarily fixed by replace the nRF52832 chip on the dev board but now it's back again. Not sure what I'm doing wrong.

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    The nRF52832 is classified as ESD HBM class 3A(up-to 4000 V), so it’s very unlikely that ESD from human is the cause. My theory is that the external power supply have caused this with voltage spikes. In order for this not to happen again, I would recommend to cut or de-solder the SB12 bridge( in order to activate/reconnect the voltage protection diode again), and then adjust the power supply to accommodate for the ~0.32V voltage drop that is over the protection diode.

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    The nRF52832 is classified as ESD HBM class 3A(up-to 4000 V), so it’s very unlikely that ESD from human is the cause. My theory is that the external power supply have caused this with voltage spikes. In order for this not to happen again, I would recommend to cut or de-solder the SB12 bridge( in order to activate/reconnect the voltage protection diode again), and then adjust the power supply to accommodate for the ~0.32V voltage drop that is over the protection diode.

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