Espressif ESP32-S2 Programming Manual page 25

Chapter 1. Get Started
No. Name Type
1 G G
2 RST I
3 46 I
4 45 I/O/T
5 RX I/O/T
6 TX I/O/T
7 42 I/O/T
8 41 I/O/T
9 40 I/O/T
10 39 I/O/T
11 38 I/O/T
12 37 I/O/T
13 36 I/O/T
14 35 I/O/T
15 34 I/O/T
16 33 I/O/T
17 26 I/O/T
18 21 I/O/T
19 20 I/O/T
20 19 I/O/T
21 18 I/O/T
Fig. 9: ESP32-S2-DevKitM-1(U) Pin Layout (click to enlarge)
Pin Layout
Espressif Systems
Function
Ground
CHIP_PU
GPIO46
GPIO45
U0RXD, GPIO44, CLK_OUT2
U0TXD, GPIO43, CLK_OUT1
MTMS, GPIO42
MTDI, GPIO41, CLK_OUT1
MTDO, GPIO40, CLK_OUT2
MTCK, GPIO39, CLK_OUT3
GPIO38, FSPIWP
SPIDQS, GPIO37, FSPIQ
SPIIO7, GPIO36, FSPICLK
SPIIO6, GPIO35, FSPID
SPIIO5, GPIO34, FSPICS0
SPIIO4, GPIO33, FSPIHD
SPICS1, GPIO26
RTC_GPIO21, GPIO21
RTC_GPIO20, GPIO20, U1CTS, ADC2_CH9, CLK_OUT1, USB_D+
RTC_GPIO19, GPIO19, U1RTS, ADC2_CH8, CLK_OUT2, USB_D-
RTC_GPIO18, GPIO18, U1RXD, ADC2_CH7, DAC_2, CLK_OUT3, RGB LED
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