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Seeed Studio XIAO ESP32C3 pinout

Name: Seeed Studio XIAO ESP32C3 pinout with per-pin electrical limits
Creator: Xirkit

All 22 pins of the Seeed Studio XIAO ESP32C3, each mapped to the ESP32-C3FH4 pad it routes to, with its functions and — for 16 pins — the electrical limits from the chip datasheet. Every number cites its page and table.

22 pins documented16 with electrical limits15 gpio1 power out3 ground2 power in1 controlcomplete pinout

Pin table

Seeed Studio XIAO ESP32C3 pins, functions and electrical limits

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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
D0	J2 · 1	gpio	GPIO2	Analog, ADC1_CH2, GPIO2, FSPIQ, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
D1	J2 · 2	gpio	GPIO3	Analog, ADC1_CH3, GPIO3, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
D2	J2 · 3	gpio	GPIO4	Analog, ADC1_CH4, FSPIHD, MTMS, GPIO4, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
D3	J2 · 4	gpio	GPIO5	Analog, ADC2_CH0, FSPIWP, MTDI, GPIO5, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
D4	J2 · 5	gpio	GPIO6	SDA, FSPICLK, MTCK, GPIO6, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
D5	J2 · 6	gpio	GPIO7	SCL, FSPID, MTDO, GPIO7, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
D6	J2 · 7	gpio	GPIO21	TX, U0TXD, GPIO21, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
D7	J1 · 8	gpio	GPIO20	RX, U0RXD, GPIO20, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
D8	J1 · 9	gpio	GPIO8	SCK, GPIO8, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
D9	J1 · 10	gpio	GPIO9	MISO, BOOT button, GPIO9, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
D10	J1 · 11	gpio	GPIO10	MOSI, FSPICS0, GPIO10, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
3V3	J1 · 12	power out		power_out									p.2 table 2_1
GND	J1 · 13	ground		ground
5V	J1 · 14	power in		power_in									p.2 table 2_1
TP1	bottom_pads · TP1	ground		ground
TP2	bottom_pads · TP2	gpio	GPIO4	MTMS, GPIO4, FSPIHD, ADC1_CH4, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
TP3	bottom_pads · TP3	gpio	GPIO5	MTDI, GPIO5, FSPIWP, ADC2_CH0, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
TP4	bottom_pads · TP4	gpio	GPIO6	MTCK, GPIO6, FSPICLK, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
TP5	bottom_pads · TP5	gpio	GPIO7	MTDO, GPIO7, FSPID, GPIO matrix (any routable peripheral signal)	2.475–3.6 V	-0.3–0.825 V	≥ 2.64 V	≤ 0.33 V	40 mA typ	28 mA typ	no	-0.3–3.6 V	ESP32-C3 datasheet p.55 table 55_2
TP6	bottom_pads · TP6	control	CHIP_EN	en	2.475–3.6 V	-0.3–0.825 V					no		ESP32-C3 datasheet p.55 table 55_2
BAT+	bottom_pads · BAT+	power in		power_in									p.2 table 2_1
GND	bottom_pads · GND pad	ground		ground

Answers from the record

Seeed Studio XIAO ESP32C3 pinout FAQ

What microcontroller does the Seeed Studio XIAO ESP32C3 use?

The Seeed Studio XIAO ESP32C3 is built around the ESP32-C3FH4, alongside TLV75733PDBVR.

How many GPIO pins does the Seeed Studio XIAO ESP32C3 have?

11 GPIO pins are exposed. Xirkit documents 22 board pins, 16 of them with pin-level electrical limits.

Are the Seeed Studio XIAO ESP32C3 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: 2.475–3.6 V.

How much current can a Seeed Studio XIAO ESP32C3 GPIO pin source?

Documented output-high current per pin: 40 mA typ. Values are traced to the chip datasheet; see the pinout table for per-pin limits and conditions.

What voltage powers the Seeed Studio XIAO ESP32C3?

Supply range 3.7–5 V. Power inputs: 5V, BAT+.

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