Datasheet

3. Pin Definitions
Note:
The pin diagram shows the approximate location of pins on the module. For the actual mechanical diagram, please refer
to Figure 7.1 Physical Dimensions.
3.2 Pin Description
The module has 42 pins. See pin definitions in Table 2.
Table 2: Pin Definitions
Name No. Type Function
GND 1 P Ground
3V3 2 P Power supply
IO0 3 I/O/T RTC_GPIO0, GPIO0
IO1 4 I/O/T RTC_GPIO1, GPIO1, TOUCH1, ADC1_CH0
IO2 5 I/O/T RTC_GPIO2, GPIO2, TOUCH2, ADC1_CH1
IO3 6 I/O/T RTC_GPIO3, GPIO3, TOUCH3, ADC1_CH2
IO4 7 I/O/T RTC_GPIO4, GPIO4, TOUCH4, ADC1_CH3
IO5 8 I/O/T RTC_GPIO5, GPIO5, TOUCH5, ADC1_CH4
IO6 9 I/O/T RTC_GPIO6, GPIO6, TOUCH6, ADC1_CH5
IO7 10 I/O/T RTC_GPIO7, GPIO7, TOUCH7, ADC1_CH6
IO8 11 I/O/T RTC_GPIO8, GPIO8, TOUCH8, ADC1_CH7
IO9 12 I/O/T RTC_GPIO9, GPIO9, TOUCH9, ADC1_CH8, FSPIHD
IO10 13 I/O/T RTC_GPIO10, GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4
IO11 14 I/O/T RTC_GPIO11, GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5
IO12 15 I/O/T RTC_GPIO12, GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6
IO13 16 I/O/T RTC_GPIO13, GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7
IO14 17 I/O/T RTC_GPIO14, GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS
IO15 18 I/O/T RTC_GPIO15, GPIO15, U0RTS, ADC2_CH4, XTAL_32K_P
IO16 19 I/O/T RTC_GPIO16, GPIO16, U0CTS, ADC2_CH5, XTAL_32K_N
IO17 20 I/O/T RTC_GPIO17, GPIO17, U1TXD, ADC2_CH6, DAC_1
IO18 21 I/O/T RTC_GPIO18, GPIO18, U1RXD, ADC2_CH7, DAC_2, CLK_OUT3
IO19 22 I/O/T RTC_GPIO19, GPIO19, U1RTS, ADC2_CH8, CLK_OUT2, USB_D-
IO20 23 I/O/T RTC_GPIO20, GPIO20, U1CTS, ADC2_CH9, CLK_OUT1, USB_D+
IO21 24 I/O/T RTC_GPIO21, GPIO21
IO26 25 I/O/T SPICS1, GPIO26
GND 26 P Ground
IO33 27 I/O/T SPIIO4, GPIO33, FSPIHD
IO34 28 I/O/T SPIIO5, GPIO34, FSPICS0
IO35 29 I/O/T SPIIO6, GPIO35, FSPID
IO36 30 I/O/T SPIIO7, GPIO36, FSPICLK
IO37 31 I/O/T SPIDQS, GPIO37, FSPIQ
IO38 32 I/O/T GPIO38, FSPIWP
IO39 33 I/O/T MTCK, GPIO39, CLK_OUT3
Espressif Systems 10
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ESP32-S2-WROOM & ESP32-S2-WROOM-I Datasheet V1.1