RT1061 falied to power up dap

[cyesman]

Customer had applied the RT1061 into production for months . Now several boards seems to be unnormally. The VCC_SOC_IN was 1.275V, Jlink cannot connect the core via to SWD line(Jlink found SWD-DP with ID 0x0BD11477 Failed to power up DAP), the code didn't run up.
When reset the RT1061, it worked well as usual. Hardly to recover this issue.

[jeremyzhou]

Hi，
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
According to the above statement, some boards will crash after running for a period of time, further, the Jlink also fails to connect them.
However, it will run well again after repower-up.
If my understanding is right, I'd like to know if these boards will crash again, do these boards have some different electrical specifications versus correct boards?
TIC

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[cyesman]

Thanks for your reply.

Customer had used Low Power Idle mode, the source of wake-up was GPIO interrupt input.
Now we cannot know whether these boards will crash again or not. This problem is difficult to appear, maybe for days or months. These boards electrical specifications are same to other correct boards. We want to know what's the state of RT1061 when the VCC_SOC_IN be 1.27V. I supposed to MCU had been waked up, and run into full speed clock mode. But I cannot understand that why Jlink failed to connect the MCU.