Espressif ESP32 Technical Reference Manual page 89

4 IO_MUX and GPIO Matrix (GPIO, IO_MUX)
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RTCIO_XTAL_X32P_SLP_OE Output enable of the pad in sleep mode. 1: enabled; 0: disabled.
(R/W)
RTCIO_XTAL_X32P_FUN_IE Input enable of the pad. 1: enabled; 0: disabled. (R/W)
RTCIO_XTAL_DRES_XTAL_32K 32K XTAL resistor bias control. (R/W)
RTCIO_XTAL_DBIAS_XTAL_32K 32K XTAL self-bias reference control. (R/W)
31 30 29 28 27 26 25
0 1 1 0 0 1 1
RTCIO_TOUCH_XPD_BIAS Touch sensor bias power on bit. 1: power on; 0: disabled. (R/W)
RTCIO_TOUCH_DREFH Touch sensor saw wave top voltage. (R/W)
RTCIO_TOUCH_DREFL Touch sensor saw wave bottom voltage. (R/W)
RTCIO_TOUCH_DRANGE Touch sensor saw wave voltage range. (R/W)
RTCIO_TOUCH_DCUR Touch sensor bias current. When BIAS_SLEEP is enabled, this setting is
available. (R/W)
Espressif Systems
Register 4.51. RTCIO_XTAL_32K_PAD_REG (0x008C)
Register 4.52. RTCIO_TOUCH_CFG_REG (0x0090)
24 23 22
0 0 0 0 0 0 0 0
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0 0 0 0 0 0 0 0
89
0 0 0 0 0 0 0 0
ESP32 TRM (Version 5.2)
0
0 Reset