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The circuit has to hang with fixed current

hi all,

I have an issue with hardware in the circuit, which is designed by my self. The PCB has designed a customized   

condition:

I have erased full memory and measure current consumption, it is as 2.45mA

Then I have connected load with pin p0.10, now the current down to 1.1 mA then remove the load from p0.10 it does not settle back to 2.45mA retain in 1.1mA.

Note:

during this issue, there was no any firmware in the chip including soft device also not present in the chip.

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