Pad Hold ---- REG_DG_PAD_FORCE_UNHOLD

[PaulShaw]

hi.
I want set GPIO21 to low in deep sleep,it's not a RTC-GPIO.
So I want to use Pad Hold,but I don't find REG_DG_PAD_FORCE_UNHOLD in "esp32_technical_reference_manual_cn V3.4".
Where is it?How to use it?

Thanks in advance for your help!

[WiFive]

RTC_CNTL_DG_PAD_FORCE_HOLD

[PaulShaw]

I set it to 0,GPIO21 hold it's level,and RTC GPIOs were also holded.
So I can't wakeup ESP32 from deep-sleep.

[PaulShaw]

Solved it!
It's in RTCIO_DIG_PAD_HOLD_REG,but it's only set to hold 0.