Operational instability in power supply connection

[Hiro]

Hello Nordic Support!

We are making a prototype that connects the battery to Vcc, but 5 out of 10
It works properly. Conversely, the remaining five do not behave as expected I am encountered.
I think that one of the following operations will be performed at the timing of battery connection.
I do not operate properly from Power On Reset, and I have suspicion that it is operating halfway.
Please comment on the relationship with Errata and W / A etc.

【Expected behavior】
· Appropriate voltage can be obtained by inputting specified voltage to the SAADC input.
· Key operation GPIO interrupt processing should function correctly.

【Action not to be expected】
· Even if a specified voltage is input to the SAADC input, a corresponding voltage can not be obtained.
· Key operation GPIO interrupt is not applied.

let me know

Best Regards!

Hirotoshi  NAGAO / CHINO

[Håkon Alseth]

Dear Hiro,

 

What is the expected value sampled, and what is shown on the bad boards?

Have you checked all the voltages going into the device to see if there's not any soldering issues on the bad boards?

 

Best regards,

Håkon