User's Manual

PRELIMINARY
2. Pin Definitions
2.2 Pin Description
ESP32-WROOM-32E has 38 pins. See pin definitions in Table 3.
Table 3: Pin Definitions
Name
No.
Type
Function
GND
1
P
Ground
3V3
2
P
Power supply
EN
3
I
Module-enable signal. Active high.
SENSOR_VP
4
I
GPIO36, ADC1_CH0, RTC_GPIO0
SENSOR_VN
5
I
GPIO39, ADC1_CH3, RTC_GPIO3
IO34
6
I
GPIO34, ADC1_CH6, RTC_GPIO4
IO35
7
I
GPIO35, ADC1_CH7, RTC_GPIO5
IO32
8
I/O
GPIO32, XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4,
TOUCH9, RTC_GPIO9
IO33
9
I/O
GPIO33, XTAL_32K_N (32.768 kHz crystal oscillator output),
ADC1_CH5, TOUCH8, RTC_GPIO8
IO25
10
I/O
GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0
IO26
11
I/O
GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1
IO27
12
I/O
GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV
IO14
13
I/O
GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK,
HS2_CLK, SD_CLK, EMAC_TXD2
IO12
14
I/O
GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ,
HS2_DATA2, SD_DATA2, EMAC_TXD3
GND
15
P
Ground
IO13
16
I/O
GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID,
HS2_DATA3, SD_DATA3, EMAC_RX_ER
NC
17
-
-
NC
18
-
-
NC
19
-
-
NC
20
-
-
NC
21
-
-
NC
22
-
-
IO15
23
I/O
GPIO15, ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13,
HS2_CMD, SD_CMD, EMAC_RXD3
IO2
24
I/O
GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0,
SD_DATA0
IO0
25
I/O
GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1,
EMAC_TX_CLK
IO4
26
I/O
GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1,
SD_DATA1, EMAC_TX_ER
IO16
27
I/O
GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT
IO17
28
I/O
GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180 -
IO5
29
I/O
GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK
IO18
30
I/O
GPIO18, VSPICLK, HS1_DATA7
4 ESP32-WROOM-32E User Manual Espressif Systems