Espressif Systems ESP32 Technical Reference Manual page 65

4.13 Registers
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)
Register 4.53: RTCIO_TOUCH_PADn_REG (n: 0-9) (0x25+1*n)
31 26 25
0 0 0 0 0 0
RTCIO_TOUCH_PADn_DAC Touch sensor slope control. 3-bit for each touch pad, defaults to 100.
(R/W)
RTCIO_TOUCH_PADn_START Start touch sensor. (R/W)
RTCIO_TOUCH_PADn_TIE_OPT Default touch sensor tie option. 0: tie low; 1: tie high. (R/W)
RTCIO_TOUCH_PADn_XPD Touch sensor power on. (R/W)
RTCIO_TOUCH_PADn_TO_GPIO Connect the RTC pad input to digital pad input, 0 is available.
(R/W)
Espressif Systems
Register 4.52: RTCIO_TOUCH_CFG_REG (0x0024)
24 23 45
0 0 0 0 0 0 0 0
23 22 21 20 19 37
0x4 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
64 ESP32 Technical Reference Manual V1.0
4 IO_MUX AND GPIO MATRIX
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
23
0 Reset
19
0 Reset