Raspberry Pi Ltd · structured pinout

Raspberry Pi Pico pinout

Name: Raspberry Pi Pico pinout with per-pin electrical limits
Creator: Xirkit

All 49 pins of the Raspberry Pi Pico, each mapped to the RP2040 pad it routes to, with its functions and — for 32 pins — the electrical limits from the chip datasheet. Every number cites its page and table.

49 pins documented32 with electrical limits26 gpio10 ground3 control1 analog1 power out2 power in2 debug2 usb2 reservedcomplete pinout

Pin table

Raspberry Pi Pico 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
GP0	J_main_40pin · 1	gpio	GPIO0	GPIO0, UART0_TX, I2C0_SDA, SPI0_RX, 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
GP1	J_main_40pin · 2	gpio	GPIO1	GPIO1, UART0_RX, I2C0_SCL, SPI0_CSn, 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
GND	J_main_40pin · 3	ground		ground
GP2	J_main_40pin · 4	gpio	GPIO2	GPIO2, I2C1_SDA, SPI0_SCK, UART0_CTS, 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
GP3	J_main_40pin · 5	gpio	GPIO3	GPIO3, I2C1_SCL, SPI0_TX, UART0_RTS, 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
GP4	J_main_40pin · 6	gpio	GPIO4	GPIO4, UART1_TX, I2C0_SDA, SPI0_RX, PWM2_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
GP5	J_main_40pin · 7	gpio	GPIO5	GPIO5, UART1_RX, I2C0_SCL, SPI0_CSn, PWM2_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
GND	J_main_40pin · 8	ground		ground
GP6	J_main_40pin · 9	gpio	GPIO6	GPIO6, I2C1_SDA, SPI0_SCK, UART1_CTS, 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
GP7	J_main_40pin · 10	gpio	GPIO7	GPIO7, I2C1_SCL, SPI0_TX, UART1_RTS, 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
GP8	J_main_40pin · 11	gpio	GPIO8	GPIO8, UART1_TX, I2C0_SDA, SPI1_RX, 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
GP9	J_main_40pin · 12	gpio	GPIO9	GPIO9, UART1_RX, I2C0_SCL, SPI1_CSn, 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
GND	J_main_40pin · 13	ground		ground
GP10	J_main_40pin · 14	gpio	GPIO10	GPIO10, I2C1_SDA, SPI1_SCK, UART1_CTS, 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
GP11	J_main_40pin · 15	gpio	GPIO11	GPIO11, I2C1_SCL, SPI1_TX, UART1_RTS, 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
GP12	J_main_40pin · 16	gpio	GPIO12	GPIO12, UART0_TX, I2C0_SDA, SPI1_RX, 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
GP13	J_main_40pin · 17	gpio	GPIO13	GPIO13, UART0_RX, I2C0_SCL, SPI1_CSn, 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
GND	J_main_40pin · 18	ground		ground
GP14	J_main_40pin · 19	gpio	GPIO14	GPIO14, I2C1_SDA, SPI1_SCK, UART0_CTS, PWM7_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
GP15	J_main_40pin · 20	gpio	GPIO15	GPIO15, I2C1_SCL, SPI1_TX, UART0_RTS, PWM7_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
GP16	J_main_40pin · 21	gpio	GPIO16	GPIO16, SPI0_RX, I2C0_SDA, UART0_TX, PWM0_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
GP17	J_main_40pin · 22	gpio	GPIO17	GPIO17, SPI0_CSn, I2C0_SCL, UART0_RX, PWM0_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
GND	J_main_40pin · 23	ground		ground
GP18	J_main_40pin · 24	gpio	GPIO18	GPIO18, SPI0_SCK, I2C1_SDA, UART0_CTS, 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
GP19	J_main_40pin · 25	gpio	GPIO19	GPIO19, SPI0_TX, I2C1_SCL, UART0_RTS, 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
GP20	J_main_40pin · 26	gpio	GPIO20	GPIO20, I2C0_SDA, SPI0_RX, UART1_TX, 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
GP21	J_main_40pin · 27	gpio	GPIO21	GPIO21, I2C0_SCL, SPI0_CSn, UART1_RX, PWM2_B, SIO, PIO0, PIO1, CLOCK_GPOUT0, 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
GND	J_main_40pin · 28	ground		ground
GP22	J_main_40pin · 29	gpio	GPIO22	GPIO22, SPI0_SCK, UART1_CTS, I2C1_SDA, PWM3_A, SIO, PIO0, PIO1, CLOCK_GPIN1, 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
RUN	J_main_40pin · 30	control	RUN	run	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
GP26	J_main_40pin · 31	gpio	GPIO26	GPIO26, ADC0, I2C1_SDA, SPI1_SCK, UART1_CTS, PWM5_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
GP27	J_main_40pin · 32	gpio	GPIO27	GPIO27, ADC1, I2C1_SCL, SPI1_TX, UART1_RTS, PWM5_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
AGND	J_main_40pin · 33	ground		ground
GP28	J_main_40pin · 34	gpio	GPIO28	GPIO28, ADC2, SPI1_RX, UART0_TX, I2C0_SDA, PWM6_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
ADC_VREF	J_main_40pin · 35	analog	ADC_AVDD	adc_vref									p.20
3V3(OUT)	J_main_40pin · 36	power out		power_out									p.9
3V3_EN	J_main_40pin · 37	control		3v3_en									p.9
GND	J_main_40pin · 38	ground		ground
VSYS	J_main_40pin · 39	power in		power_in									p.9
VBUS	J_main_40pin · 40	power in		power_in									p.11
SWCLK	J_debug_SWD · 1	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
GND	J_debug_SWD · 2	ground		ground
SWDIO	J_debug_SWD · 3	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
TP1	test_points_underside · TP1	ground		ground
TP2	test_points_underside · TP2	usb	USB_DM	tp2	≥ 2 V	≤ 0.8 V	2.8–3.3 V	0–0.3 V	per USB 1.1 full-speed specification	per USB 1.1 full-speed specification	no	≤ 3.63 V	RP2040 datasheet p.613 table 613_1
TP3	test_points_underside · TP3	usb	USB_DP	tp3	≥ 2 V	≤ 0.8 V	2.8–3.3 V	0–0.3 V	per USB 1.1 full-speed specification	per USB 1.1 full-speed specification	no	≤ 3.63 V	RP2040 datasheet p.613 table 613_1
TP4	test_points_underside · TP4	reserved	GPIO23	SPI0_TX, UART1_RTS, I2C1_SCL, PWM3_B, SIO, PIO0, PIO1, CLOCK_GPOUT1, 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
TP5	test_points_underside · TP5	reserved	GPIO25	tp5
TP6	test_points_underside · TP6	control		tp6

Answers from the record

Raspberry Pi Pico pinout FAQ

What microcontroller does the Raspberry Pi Pico use?

The Raspberry Pi Pico is built around the RP2040, alongside W25Q16JV, ABM8-272-T3, RT6150.

How many GPIO pins does the Raspberry Pi Pico have?

26 GPIO pins are exposed. Xirkit documents 49 board pins, 32 of them with pin-level electrical limits.

Are the Raspberry Pi Pico 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 Raspberry Pi Pico 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 Raspberry Pi Pico?

Supply range 1.8–5.5 V. Power inputs: VSYS (1.8–5.5 V), VBUS.

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