XIAO ESP32C6

Development Board

Code name: XIAO_ESP32C6

XIAO ESP32C6 is a development board based on the ESP32C6 microcontroller using RISCV32 architecture.

This board features a maximum CPU frequency of 160 MHz and 8MB flash memory.

About XIAO ESP32C6

The XIAO ESP32C6 is a powerful RISC-V-based development board featuring the ESP32-C6 chip. With support for WiFi 6, Bluetooth 5 (LE), and Zigbee, it’s perfect for modern IoT applications. 📡

Designed for compact projects, it includes a USB-C port for seamless programming and power, plus an onboard reset button and bootloader mode button for easy debugging. ⚡

The XIAO ESP32C6 supports multiple interfaces like UART, I2C, and SPI, making it an excellent choice for smart home automation, sensor networks, and low-power applications.

Where to Buy XIAO ESP32C6

Starting from

10$ per unit

Amazon.com Ships worldwide

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📋 Technical Specifications

Complete technical specification details for XIAO ESP32C6

🔌 USB

Type USB-C

Serial Chip Internal

🛰️ Connectivity

WiFi 802.11 ax b/g/n (2.4 GHz)

Bluetooth 5.3

BLE 5.3

Zigbee Yes

🧠 Microcontroller

Model esp32c6

Clock Speed 160 MHz

Flash Size 8MB

SRAM 512KB

Architecture riscv32

✨ Features & Pins

Digital IO 11

Analog Input 7

PWM 11

Interrupts 11

• Supports WiFi 6, Bluetooth 5, and Zigbee
• Ultra-small size (21x17.5 mm)
• Low power consumption with deep sleep support

Download Full Datasheet

XIAO ESP32C6 Pinout Diagram

Complete pin reference for XIAO ESP32C6

The XIAO ESP32C6 pinout is designed to provide a well-balanced selection of I/O pins in a compact form factor. It includes essential power pins like 5V, 3.3V, and GND.

For communication, it supports UART (RX and TX), I2C (SDA and SCL), and SPI (SCK, MISO, MOSI, and SS), allowing integration with a wide range of peripherals.

Analog input pins labeled A0 to A3 make sensor integration easy, while additional GPIOs provide further flexibility.

✅ Safe Pins to Use

These pins are safe for general GPIO usage without boot or system conflicts

IO2

IO3

IO10

IO20

IO21

💡 Why Are These Pins Safe?

✓ No boot sequence involvement

✓ No flash/PSRAM connections

✓ No USB or JTAG conflicts

✓ Freely assignable without issues

⚠️ Pins to Avoid or Use with Caution

Reserved for critical functions. Misuse may cause boot failures, programming issues, or system conflicts.

🔄 Strapping Pins

Boot behavior & flash voltage

🐛 JTAG Debugging

Low-level debugging interface

🔌 USB Pins

USB Serial/JTAG communication

💾 Flash/SPI Pins

Memory & PSRAM connections

📡 UART Serial

Debugging & firmware uploads

PIN	Label	Why Avoid	Type
IO4	MTMS	Used during boot; required for JTAG debugging; flash data in internal-flash models.	🛠️ Strapping
IO5	MTDI	Used during boot; required for JTAG debugging; flash data in internal-flash models.	🛠️ Strapping
IO6	MTCK	Required for JTAG debugging; connected to flash clock in internal-flash models.	🔗 JTAG
IO7	MTDO	Required for JTAG debugging; connected to flash data in internal-flash models.	🔗 JTAG
IO8	GPIO8	Determines boot mode; pulling low at reset can prevent normal boot.	🛠️ Strapping
IO9	GPIO9	Pulling low on reset forces the ESP32-C6 into download mode instead of normal boot.	🛠️ Strapping

XIAO ESP32C6 Additional Information

More details about XIAO ESP32C6

Useful Links

Datasheets and resources for XIAO ESP32C6

Board Datasheet

Technical specifications

ESP32C6 Datasheet

Microcontroller reference

XIAO ESP32C6 Custom Pin Mapping

Pin configuration and GPIO mapping for XIAO ESP32C6

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Function	ESP Pin	I/O Type	Description
1	5V	5V	POWER INPUT	5V power input
2	GND	GND	GROUND	Ground connection
3	3V3	3.3V	POWER OUTPUT	3.3V power output
4	IO2	A0	BIDIRECTIONAL	GPIO, ADC
5	IO3	A1	BIDIRECTIONAL	GPIO, ADC
6	IO4	A2	BIDIRECTIONAL	GPIO, ADC
7	IO5	A3	BIDIRECTIONAL	GPIO, ADC
8	IO6	SDA	BIDIRECTIONAL	GPIO, I2C Data
9	IO7	SCL	BIDIRECTIONAL	GPIO, I2C Clock
10	IO8	SCK	BIDIRECTIONAL	GPIO, SPI Clock
11	IO9	MISO	BIDIRECTIONAL	GPIO, SPI Data
12	IO10	MOSI	BIDIRECTIONAL	GPIO, SPI Data
13	IO20	RX	BIDIRECTIONAL	GPIO, UART Receive
14	IO21	TX	BIDIRECTIONAL	GPIO, UART Transmit

Legend

Function Pin role

GPIO ESP32 pin

I/O Direction

# Pin number

Pin Mappings

Complete pinout and GPIO mapping for XIAO ESP32C6

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Other
2	A0
3	A1
4	A2
5	A3
6		SDA
7		SCL
8		SCK
9		MISO
10		MOSI
20		RX SS
21		TX

Legend

A0 Analog input

T0 Touch sensor

PWM PWM capable

RX/TX Serial pins

LED Built-in LED

# Pin number

Default Tools & Configuration

Build and upload settings for XIAO ESP32C6

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x0`
Flash mode	qio
Boot mode	qio
Maximum upload size	1920 KB (1966080 bytes)
Maximum data size	640 KB (655360 bytes)