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Adafruit Feather RP2040 pinout

Name: Adafruit Feather RP2040 pinout with per-pin electrical limits
Creator: Xirkit

All 30 pins of the Adafruit Feather RP2040, each mapped to the RP2040 pad it routes to, with its functions and — for 24 pins — the electrical limits from the chip datasheet. Every number cites its page and table.

30 pins documented24 with electrical limits2 control2 power out1 ground21 gpio2 power in2 debugcomplete pinout

Pin table

Adafruit Feather RP2040 pins, functions and electrical limits

Markdown · JSON

VIH/VIL: input thresholds · VOH/VOL: output levels · IOH/IOL: output current. Values apply to the chip pad each pin routes to, under the conditions cited in the source.
Pin	Position	Kind	Chip pad	Functions	VIH	VIL	VOH	VOL	IOH	IOL	5 V tolerant	Abs max	Source
Rst	JP1 (16-pin) · 1	control	RUN	rst	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
3.3V	JP1 (16-pin) · 2	power out		power_out									p.16
3.3V	JP1 (16-pin) · 3	power out		power_out									p.16
GND	JP1 (16-pin) · 4	ground		ground
A0	JP1 (16-pin) · 5	gpio	GPIO26	SPI1_SCK, UART1_CTS, I2C1_SDA, PWM5_A, SIO, PIO0, PIO1, USB_VBUS_EN, ADC0	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
A1	JP1 (16-pin) · 6	gpio	GPIO27	SPI1_TX, UART1_RTS, I2C1_SCL, PWM5_B, SIO, PIO0, PIO1, USB_OVCUR_DET, ADC1	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
A2	JP1 (16-pin) · 7	gpio	GPIO28	SPI1_RX, UART0_TX, I2C0_SDA, PWM6_A, SIO, PIO0, PIO1, USB_VBUS_DET, ADC2	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
A3	JP1 (16-pin) · 8	gpio	GPIO29	SPI1_CSn, UART0_RX, I2C0_SCL, PWM6_B, SIO, PIO0, PIO1, USB_VBUS_EN, ADC3	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
D24	JP1 (16-pin) · 9	gpio	GPIO24	Arduino Wire1 SDA, SPI1_RX, UART1_TX, I2C0_SDA, PWM4_A, SIO, PIO0, PIO1, CLOCK_GPOUT2, USB_OVCUR_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
D25	JP1 (16-pin) · 10	gpio	GPIO25	Arduino Wire1 SCL, SPI1_CSn, UART1_RX, I2C0_SCL, PWM4_B, SIO, PIO0, PIO1, CLOCK_GPOUT3, USB_VBUS_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
SCK	JP1 (16-pin) · 11	gpio	GPIO18	SPI0_SCK, UART0_CTS, I2C1_SDA, PWM1_A, SIO, PIO0, PIO1, USB_OVCUR_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
MO	JP1 (16-pin) · 12	gpio	GPIO19	SPI0_TX, UART0_RTS, I2C1_SCL, PWM1_B, SIO, PIO0, PIO1, USB_VBUS_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
MI	JP1 (16-pin) · 13	gpio	GPIO20	SPI0_RX, UART1_TX, I2C0_SDA, PWM2_A, SIO, PIO0, PIO1, CLOCK_GPIN0, USB_VBUS_EN	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
RX	JP1 (16-pin) · 14	gpio	GPIO1	SPI0_CSn, UART0_RX, I2C0_SCL, PWM0_B, SIO, PIO0, PIO1, USB_VBUS_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
TX	JP1 (16-pin) · 15	gpio	GPIO0	SPI0_RX, UART0_TX, I2C0_SDA, PWM0_A, SIO, PIO0, PIO1, USB_OVCUR_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
D4	JP1 (16-pin) · 16	gpio	GPIO6	SPI0_SCK, UART1_CTS, I2C1_SDA, PWM3_A, SIO, PIO0, PIO1, USB_OVCUR_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
BAT	JP3 (12-pin) · 1	power in		power_in									p.35
EN	JP3 (12-pin) · 2	control		en
USB	JP3 (12-pin) · 3	power in		power_in									p.36
D13	JP3 (12-pin) · 4	gpio	GPIO13	red LED (board.LED), SPI1_CSn, UART0_RX, I2C0_SCL, PWM6_B, SIO, PIO0, PIO1, USB_VBUS_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
D12	JP3 (12-pin) · 5	gpio	GPIO12	SPI1_RX, UART0_TX, I2C0_SDA, PWM6_A, SIO, PIO0, PIO1, USB_OVCUR_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
D11	JP3 (12-pin) · 6	gpio	GPIO11	SPI1_TX, UART1_RTS, I2C1_SCL, PWM5_B, SIO, PIO0, PIO1, USB_VBUS_EN	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
D10	JP3 (12-pin) · 7	gpio	GPIO10	SPI1_SCK, UART1_CTS, I2C1_SDA, PWM5_A, SIO, PIO0, PIO1, USB_VBUS_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
D9	JP3 (12-pin) · 8	gpio	GPIO9	SPI1_CSn, UART1_RX, I2C0_SCL, PWM4_B, SIO, PIO0, PIO1, USB_OVCUR_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
D6	JP3 (12-pin) · 9	gpio	GPIO8	SPI1_RX, UART1_TX, I2C0_SDA, PWM4_A, SIO, PIO0, PIO1, USB_VBUS_EN	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
D5	JP3 (12-pin) · 10	gpio	GPIO7	SPI0_TX, UART1_RTS, I2C1_SCL, PWM3_B, SIO, PIO0, PIO1, USB_VBUS_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
SCL	JP3 (12-pin) · 11	gpio	GPIO3	STEMMA QT SCL (I2C1), SPI0_TX, UART0_RTS, I2C1_SCL, PWM1_B, SIO, PIO0, PIO1, USB_OVCUR_DET	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
SDA	JP3 (12-pin) · 12	gpio	GPIO2	STEMMA QT SDA (I2C1), SPI0_SCK, UART0_CTS, I2C1_SDA, PWM1_A, SIO, PIO0, PIO1, USB_VBUS_EN	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
SWCLK	SWD pads · back pad	debug	SWCLK	swclk	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1
SWDIO	SWD pads · back pad	debug	SWD	swdio	2–3.6 V	-0.3–0.8 V	2.62–3.3 V	0–0.5 V	≤ 12 mA	≤ 12 mA	no	-0.5–3.8 V	RP2040 datasheet p.617 table 617_1

Answers from the record

Adafruit Feather RP2040 pinout FAQ

What microcontroller does the Adafruit Feather RP2040 use?

The Adafruit Feather RP2040 is built around the RP2040, alongside W25Q64JVSSIQ, MCP73831, WS2812B.

How many GPIO pins does the Adafruit Feather RP2040 have?

21 GPIO pins are exposed. Xirkit documents 30 board pins, 24 of them with pin-level electrical limits.

Are the Adafruit Feather RP2040 I/O pins 5 V tolerant?

No. The I/O pins are not 5 V tolerant — they run at 3.3 V logic; use a level shifter for 5 V signals. Input-high threshold: 2–3.6 V.

How much current can a Adafruit Feather RP2040 GPIO pin source?

Documented output-high current per pin: ≤ 12 mA. Values are traced to the chip datasheet; see the pinout table for per-pin limits and conditions.

What voltage powers the Adafruit Feather RP2040?

Supply range 3.7–5 V. Power inputs: BAT (?–4.2 V), USB.

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