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CC3235S: CC3235S Custom board Weird behaviour

Part Number: CC3235S
Other Parts Discussed in Thread: UNIFLASH

Tool/software:

Hi folks,

I've designed a custom Wi-Fi board using the CC3235S chip. Upon powering up, the board operates correctly and I can see the expected 1.2V and 1.9V on the DCDC_DIG and DCDC_ANA outputs..

However, I'm encountering an issue with the reset pin. The board's behavior seems to depend on the duration of the reset period. If the reset duration is very short, the chip boots up properly and the voltages on the DCDC pins are as expected. But if the reset duration is longer (e.g., 1 or 2 seconds), the chip fails to boot up after the reset is released.

Has anyone experienced a similar issue or have any insights?

Thanks,

Saber