Data Sheet
Table Of Contents
- 1 Overview
- 2 Pin Definitions
- 3 Functional Description
- 4 Peripherals and Sensors
- 4.1 Descriptions of Peripherals and Sensors
- 4.1.1 General Purpose Input / Output Interface (GPIO)
- 4.1.2 Analog-to-Digital Converter (ADC)
- 4.1.3 Hall Sensor
- 4.1.4 Digital-to-Analog Converter (DAC)
- 4.1.5 Touch Sensor
- 4.1.6 Ultra-Low-Power Co-processor
- 4.1.7 Ethernet MAC Interface
- 4.1.8 SD/SDIO/MMC Host Controller
- 4.1.9 SDIO/SPI Slave Controller
- 4.1.10 Universal Asynchronous Receiver Transmitter (UART)
- 4.1.11 I²C Interface
- 4.1.12 I²S Interface
- 4.1.13 Infrared Remote Controller
- 4.1.14 Pulse Counter
- 4.1.15 Pulse Width Modulation (PWM)
- 4.1.16 LED PWM
- 4.1.17 Serial Peripheral Interface (SPI)
- 4.1.18 Accelerator
- 4.2 Peripheral Pin Configurations
- 4.1 Descriptions of Peripherals and Sensors
- 5 Electrical Characteristics
- 6 Package Information
- 7 Part Number and Ordering Information
- 8 Learning Resources
- Appendix A – ESP32 Pin Lists
- Revision History
Appendix A
IO_MUX
Pin No.
Power
Supply Pin
Analog Pin
Digital Pin
Power Domain
Analog
Function1
Analog
Function2
Analog
Function3
RTC
Function1
RTC
Function2
Function1
Type
Function2
Type
Function3
Type
Function4
Type
Function5
Type
Function6
Type
Drive Strength
(2’d2: 20 mA)
At Reset
After Reset
1
VDDA
VDDA supply in
2
LNA_IN
VDD3P3
3
VDD3P3
VDD3P3 supply in
4
VDD3P3
VDD3P3 supply in
5
SENSOR_VP
VDD3P3_RTC
ADC_H
ADC1_CH0
RTC_GPIO0
GPIO36
I
GPIO36
I
oe=0, ie=0
oe=0, ie=0
6
SENSOR_CAPP
VDD3P3_RTC
ADC_H
ADC1_CH1
RTC_GPIO1
GPIO37
I
GPIO37
I
oe=0, ie=0
oe=0, ie=0
7
SENSOR_CAPN
VDD3P3_RTC
ADC_H
ADC1_CH2
RTC_GPIO2
GPIO38
I
GPIO38
I
oe=0, ie=0
oe=0, ie=0
8
SENSOR_VN
VDD3P3_RTC
ADC_H
ADC1_CH3
RTC_GPIO3
GPIO39
I
GPIO39
I
oe=0, ie=0
oe=0, ie=0
9
CHIP_PU
VDD3P3_RTC
10
VDET_1
VDD3P3_RTC
ADC1_CH6
RTC_GPIO4
GPIO34
I
GPIO34
I
oe=0, ie=0
oe=0, ie=0
11
VDET_2
VDD3P3_RTC
ADC1_CH7
RTC_GPIO5
GPIO35
I
GPIO35
I
oe=0, ie=0
oe=0, ie=0
12
32K_XP
VDD3P3_RTC
XTAL_32K_P
ADC1_CH4
TOUCH9
RTC_GPIO9
GPIO32
I/O/T
GPIO32
I/O/T
2'd2
oe=0, ie=0
oe=0, ie=0
13
32K_XN
VDD3P3_RTC
XTAL_32K_N
ADC1_CH5
TOUCH8
RTC_GPIO8
GPIO33
I/O/T
GPIO33
I/O/T
2'd2
oe=0, ie=0
oe=0, ie=0
14
GPIO25
VDD3P3_RTC
DAC_1
ADC2_CH8
RTC_GPIO6
GPIO25
I/O/T
GPIO25
I/O/T
EMAC_RXD0
I
2'd2
oe=0, ie=0
oe=0, ie=0
15
GPIO26
VDD3P3_RTC
DAC_2
ADC2_CH9
RTC_GPIO7
GPIO26
I/O/T
GPIO26
I/O/T
EMAC_RXD1
I
2'd2
oe=0, ie=0
oe=0, ie=0
16
GPIO27
VDD3P3_RTC
ADC2_CH7
TOUCH7
RTC_GPIO17
GPIO27
I/O/T
GPIO27
I/O/T
EMAC_RX_DV
I
2'd2
oe=0, ie=0
oe=0, ie=0
17
MTMS
VDD3P3_RTC
ADC2_CH6
TOUCH6
RTC_GPIO16
MTMS
I0
HSPICLK
I/O/T
GPIO14
I/O/T
HS2_CLK
O
SD_CLK
I0
EMAC_TXD2
O
2'd2
oe=0, ie=0
oe=0, ie=1, wpu
18
MTDI
VDD3P3_RTC
ADC2_CH5
TOUCH5
RTC_GPIO15
MTDI
I1
HSPIQ
I/O/T
GPIO12
I/O/T
HS2_DATA2
I1/O/T
SD_DATA2
I1/O/T
EMAC_TXD3
O
2'd2
oe=0, ie=1, wpd
oe=0, ie=1, wpd
19
VDD3P3_RTC
VDD3P3_RTC supply in
20
MTCK
VDD3P3_RTC
ADC2_CH4
TOUCH4
RTC_GPIO14
MTCK
I1
HSPID
I/O/T
GPIO13
I/O/T
HS2_DATA3
I1/O/T
SD_DATA3
I1/O/T
EMAC_RX_ER
I
2'd2
oe=0, ie=0
oe=0, ie=1, wpd
21
MTDO
VDD3P3_RTC
ADC2_CH3
TOUCH3
RTC_GPIO13
I2C_SDA
MTDO
O/T
HSPICS0
I/O/T
GPIO15
I/O/T
HS2_CMD
I1/O/T
SD_CMD
I1/O/T
EMAC_RXD3
I
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
22
GPIO2
VDD3P3_RTC
ADC2_CH2
TOUCH2
RTC_GPIO12
I2C_SCL
GPIO2
I/O/T
HSPIWP
I/O/T
GPIO2
I/O/T
HS2_DATA0
I1/O/T
SD_DATA0
I1/O/T
2'd2
oe=0, ie=1, wpd
oe=0, ie=1, wpd
23
GPIO0
VDD3P3_RTC
ADC2_CH1
TOUCH1
RTC_GPIO11
I2C_SDA
GPIO0
I/O/T
CLK_OUT1
O
GPIO0
I/O/T
EMAC_TX_CLK
I
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
24
GPIO4
VDD3P3_RTC
ADC2_CH0
TOUCH0
RTC_GPIO10
I2C_SCL
GPIO4
I/O/T
HSPIHD
I/O/T
GPIO4
I/O/T
HS2_DATA1
I1/O/T
SD_DATA1
I1/O/T
EMAC_TX_ER
O
2'd2
oe=0, ie=1, wpd
oe=0, ie=1, wpd
25
GPIO16
VDD_SDIO
GPIO16
I/O/T
GPIO16
I/O/T
HS1_DATA4
I1/O/T
U2RXD
I1
EMAC_CLK_OUT
O
2'd2
oe=0, ie=0
oe=0, ie=1
26
VDD_SDIO
VDD_SDIO supply out/in
27
GPIO17
VDD_SDIO
GPIO17
I/O/T
GPIO17
I/O/T
HS1_DATA5
I1/O/T
U2TXD
O
EMAC_CLK_OUT_180
O
2'd2
oe=0, ie=0
oe=0, ie=1
28
SD_DATA_2
VDD_SDIO
SD_DATA2
I1/O/T
SPIHD
I/O/T
GPIO9
I/O/T
HS1_DATA2
I1/O/T
U1RXD
I1
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
29
SD_DATA_3
VDD_SDIO
SD_DATA3
I0/O/T
SPIWP
I/O/T
GPIO10
I/O/T
HS1_DATA3
I1/O/T
U1TXD
O
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
30
SD_CMD
VDD_SDIO
SD_CMD
I1/O/T
SPICS0
I/O/T
GPIO11
I/O/T
HS1_CMD
I1/O/T
U1RTS
O
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
31
SD_CLK
VDD_SDIO
SD_CLK
I0
SPICLK
I/O/T
GPIO6
I/O/T
HS1_CLK
O
U1CTS
I1
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
32
SD_DATA_0
VDD_SDIO
SD_DATA0
I1/O/T
SPIQ
I/O/T
GPIO7
I/O/T
HS1_DATA0
I1/O/T
U2RTS
O
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
33
SD_DATA_1
VDD_SDIO
SD_DATA1
I1/O/T
SPID
I/O/T
GPIO8
I/O/T
HS1_DATA1
I1/O/T
U2CTS
I1
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
34
GPIO5
VDD3P3_CPU
GPIO5
I/O/T
VSPICS0
I/O/T
GPIO5
I/O/T
HS1_DATA6
I1/O/T
EMAC_RX_CLK
I
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
35
GPIO18
VDD3P3_CPU
GPIO18
I/O/T
VSPICLK
I/O/T
GPIO18
I/O/T
HS1_DATA7
I1/O/T
2'd2
oe=0, ie=0
oe=0, ie=1
36
GPIO23
VDD3P3_CPU
GPIO23
I/O/T
VSPID
I/O/T
GPIO23
I/O/T
HS1_STROBE
I0
2'd2
oe=0, ie=0
oe=0, ie=1
37
VDD3P3_CPU
VDD3P3_CPU supply in
38
GPIO19
VDD3P3_CPU
GPIO19
I/O/T
VSPIQ
I/O/T
GPIO19
I/O/T
U0CTS
I1
EMAC_TXD0
O
2'd2
oe=0, ie=0
oe=0, ie=1
39
GPIO22
VDD3P3_CPU
GPIO22
I/O/T
VSPIWP
I/O/T
GPIO22
I/O/T
U0RTS
O
EMAC_TXD1
O
2'd2
oe=0, ie=0
oe=0, ie=1
40
U0RXD
VDD3P3_CPU
U0RXD
I1
CLK_OUT2
O
GPIO3
I/O/T
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
41
U0TXD
VDD3P3_CPU
U0TXD
O
CLK_OUT3
O
GPIO1
I/O/T
EMAC_RXD2
I
2'd2
oe=0, ie=1, wpu
oe=0, ie=1, wpu
42
GPIO21
VDD3P3_CPU
GPIO21
I/O/T
VSPIHD
I/O/T
GPIO21
I/O/T
EMAC_TX_EN
O
2'd2
oe=0, ie=0
oe=0, ie=1
43
VDDA
VDDA supply in
44
XTAL_N
VDDA
45
XTAL_P
VDDA
46
VDDA
VDDA supply in
47
CAP2
VDDA
48
CAP1
VDDA
Total
Number
8
14
26
Notes:
• wpu: weak pull-up;"
• wpd: weak pull-down;"
• ie: input enable;"
• oe: output enable;"
•
Please see Table: Notes on ESP32 Pin Lists for more information.（请参考表：管脚清单说明。）
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ESP32 Series Datasheet v3.5