Adafruit ESP32-S2 Feather - 4MB Flash + 2MB PSRAM

Logical pinout · physical placement not verified

2 grouped source records are expanded into separate logical pads where unambiguous; physical placement is not implied.

USB-C
USB-C port used for powering and programming; charges the LiPoly battery when USB is plugged in.
Type · PowerVoltage · USB 5V input
LiPoly JST 2-PH
Battery connector for a 250 mAh or larger 3.7/4.2 V LiPoly battery; can power the Feather and charge from USB.
Type · PowerVoltage · 3.7/4.2V LiPoly
GND
Common ground for all power and logic.
Type · GroundVoltage · 0V
BAT
Positive voltage to/from the 2-pin JST jack for the optional LiPoly battery.
Type · PowerVoltage · Battery voltage
USB
Positive voltage to/from the USB-C jack when USB is connected.
Type · USBVoltage · USB voltage
EN
3.3 V regulator enable; pulled up, connect to ground to disable the regulator.
Type · ControlVoltage · 3.3V logic
3.3V
Output from the 3.3 V regulator; Adafruit states it can supply 500 mA peak.
Type · PowerVoltage · 3.3V output, 500mA peak
SCK
SPI clock pin on the ESP32-S2 high-speed peripheral.
Type · SPIVoltage · 3.3V logic
MOSI
SPI microcontroller-out / sensor-in data pin.
Type · SPIVoltage · 3.3V logic
MISO
SPI microcontroller-in / sensor-out data pin.
Type · SPIVoltage · 3.3V logic
RX
UART receive pin; connect to the transmit pin on a sensor or breakout.
Type · UARTVoltage · 3.3V logic
TX
UART transmit pin; connect to the receive pin on a sensor or breakout.
Type · UARTVoltage · 3.3V logic
SCL
I2C clock pin shared with the STEMMA QT connector; Adafruit states there is a 5 kΩ pull-up on this pin.
Type · I2CVoltage · 3.3V logic
SDA
I2C data pin shared with the STEMMA QT connector; Adafruit states there is a 5 kΩ pull-up on this pin.
Type · I2CVoltage · 3.3V logic
I2C_POWER
Power-control pin that must be pulled high for the STEMMA QT connector and onboard BME280, if present, to work; handled automatically by CircuitPython/Arduino.
Type · ControlVoltage · 3.3V logic
A0
Analogue input and one of the two DAC output pins on ADC2.
Type · AnalogVoltage · 3.3V logic/analogue
A1
Analogue input and one of the two DAC output pins on ADC2.
Type · AnalogVoltage · 3.3V logic/analogue
A2-A4
Analogue input pins on ADC2.
Type · AnalogVoltage · 3.3V logic/analogue
A5
Analogue input pin on ADC1.
Type · AnalogVoltage · 3.3V logic/analogue
D5-D6, D9-D13
Digital GPIO pins; Adafruit notes D5, D6, D9 and D10 are on ADC1, while D11-D13 are on ADC2.
Type · GPIOVoltage · 3.3V logic
RST
Reset pin; tie to ground manually to reset the board.
Type · ControlVoltage · 3.3V logic
GPIO0BOOT
Boot/DFU button input available as board.BUTTON in CircuitPython and pin 0 in Arduino; used with reset for ROM bootloader mode.
Type · GPIO, ControlVoltage · 3.3V logic
Debug TXDB
Hardware UART debug transmit pin for low-level ESP32-IDF debug output, not the default Serial/CircuitPython print output.
Type · UARTVoltage · 3.3V logic

Pin	Type	Function	Voltage
USB-C	Power	USB-C port used for powering and programming; charges the LiPoly battery when USB is plugged in.	USB 5V input
LiPoly JST 2-PH	Power	Battery connector for a 250 mAh or larger 3.7/4.2 V LiPoly battery; can power the Feather and charge from USB.	3.7/4.2V LiPoly
GND	Ground	Common ground for all power and logic.	0V
BAT	Power	Positive voltage to/from the 2-pin JST jack for the optional LiPoly battery.	Battery voltage
USB	USB	Positive voltage to/from the USB-C jack when USB is connected.	USB voltage
EN	Control	3.3 V regulator enable; pulled up, connect to ground to disable the regulator.	3.3V logic
3.3V	Power	Output from the 3.3 V regulator; Adafruit states it can supply 500 mA peak.	3.3V output, 500mA peak
SCK	SPI	SPI clock pin on the ESP32-S2 high-speed peripheral.	3.3V logic
MOSI	SPI	SPI microcontroller-out / sensor-in data pin.	3.3V logic
MISO	SPI	SPI microcontroller-in / sensor-out data pin.	3.3V logic
RX	UART	UART receive pin; connect to the transmit pin on a sensor or breakout.	3.3V logic
TX	UART	UART transmit pin; connect to the receive pin on a sensor or breakout.	3.3V logic
SCL	I2C	I2C clock pin shared with the STEMMA QT connector; Adafruit states there is a 5 kΩ pull-up on this pin.	3.3V logic
SDA	I2C	I2C data pin shared with the STEMMA QT connector; Adafruit states there is a 5 kΩ pull-up on this pin.	3.3V logic
I2C_POWER	Control	Power-control pin that must be pulled high for the STEMMA QT connector and onboard BME280, if present, to work; handled automatically by CircuitPython/Arduino.	3.3V logic
A0	Analog	Analogue input and one of the two DAC output pins on ADC2.	3.3V logic/analogue
A1	Analog	Analogue input and one of the two DAC output pins on ADC2.	3.3V logic/analogue
A2-A4	Analog	Analogue input pins on ADC2.	3.3V logic/analogue
A5	Analog	Analogue input pin on ADC1.	3.3V logic/analogue
D5-D6, D9-D13	GPIO	Digital GPIO pins; Adafruit notes D5, D6, D9 and D10 are on ADC1, while D11-D13 are on ADC2.	3.3V logic
RST	Control	Reset pin; tie to ground manually to reset the board.	3.3V logic
GPIO0BOOT	GPIO, Control	Boot/DFU button input available as board.BUTTON in CircuitPython and pin 0 in Arduino; used with reset for ROM bootloader mode.	3.3V logic
Debug TXDB	UART	Hardware UART debug transmit pin for low-level ESP32-IDF debug output, not the default Serial/CircuitPython print output.	3.3V logic

Logical pinout · physical placement not verified

2 grouped source records are expanded into separate logical pads where unambiguous; physical placement is not implied.

Pin details

23 connections

USB-C
USB-C port used for powering and programming; charges the LiPoly battery when USB is plugged in.
PowerVoltage · USB 5V input
LiPoly JST 2-PH
Battery connector for a 250 mAh or larger 3.7/4.2 V LiPoly battery; can power the Feather and charge from USB.
PowerVoltage · 3.7/4.2V LiPoly
GND
Common ground for all power and logic.
GroundVoltage · 0V
BAT
Positive voltage to/from the 2-pin JST jack for the optional LiPoly battery.
PowerVoltage · Battery voltage
USB
Positive voltage to/from the USB-C jack when USB is connected.
USBVoltage · USB voltage
EN
3.3 V regulator enable; pulled up, connect to ground to disable the regulator.
ControlVoltage · 3.3V logic
3.3V
Output from the 3.3 V regulator; Adafruit states it can supply 500 mA peak.
PowerVoltage · 3.3V output, 500mA peak
SCK
SPI clock pin on the ESP32-S2 high-speed peripheral.
SPIVoltage · 3.3V logic
MOSI
SPI microcontroller-out / sensor-in data pin.
SPIVoltage · 3.3V logic
MISO
SPI microcontroller-in / sensor-out data pin.
SPIVoltage · 3.3V logic
RX
UART receive pin; connect to the transmit pin on a sensor or breakout.
UARTVoltage · 3.3V logic
TX
UART transmit pin; connect to the receive pin on a sensor or breakout.
UARTVoltage · 3.3V logic
SCL
I2C clock pin shared with the STEMMA QT connector; Adafruit states there is a 5 kΩ pull-up on this pin.
I2CVoltage · 3.3V logic
SDA
I2C data pin shared with the STEMMA QT connector; Adafruit states there is a 5 kΩ pull-up on this pin.
I2CVoltage · 3.3V logic
I2C_POWER
Power-control pin that must be pulled high for the STEMMA QT connector and onboard BME280, if present, to work; handled automatically by CircuitPython/Arduino.
ControlVoltage · 3.3V logic
A0
Analogue input and one of the two DAC output pins on ADC2.
AnalogVoltage · 3.3V logic/analogue
A1
Analogue input and one of the two DAC output pins on ADC2.
AnalogVoltage · 3.3V logic/analogue
A2-A4
Analogue input pins on ADC2.
AnalogVoltage · 3.3V logic/analogue
A5
Analogue input pin on ADC1.
AnalogVoltage · 3.3V logic/analogue
D5-D6, D9-D13
Digital GPIO pins; Adafruit notes D5, D6, D9 and D10 are on ADC1, while D11-D13 are on ADC2.
GPIOVoltage · 3.3V logic
RST
Reset pin; tie to ground manually to reset the board.
ControlVoltage · 3.3V logic
GPIO0BOOT
Boot/DFU button input available as board.BUTTON in CircuitPython and pin 0 in Arduino; used with reset for ROM bootloader mode.
GPIO, ControlVoltage · 3.3V logic
Debug TXDB
Hardware UART debug transmit pin for low-level ESP32-IDF debug output, not the default Serial/CircuitPython print output.
UARTVoltage · 3.3V logic

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