ESP32-C3-DevKitM-1

The ESP32-C3-DevKitM-1 development board is one of Espressif’s official boards. This board is based on the ESP32-C3-MINI-1 module, with the ESP32-C3 as the core.

Specifications

  • Small sized 2.4 GHz Wi-Fi (802.11b/g/n) and Bluetooth® 5 module

  • Built around ESP32-C3 series of SoCs, RISC-V single-core microprocessor

  • 4 MB flash in chip package

  • 15 available GPIOs (module)

  • Peripherals

    • 22 × programmable GPIOs

    • Digital interfaces:

    • 3 × SPI

    • 2 × UART

    • 1 × I2C

    • 1 × I2S

    • Remote control peripheral, with 2 transmit channels and 2 receive channels

    • LED PWM controller, with up to 6 channels

    • Full-speed USB Serial/JTAG controller

    • General DMA controller (GDMA), with 3 transmit channels and 3 receive channels

    • 1 × TWAI® controller (compatible with ISO 11898-1)

    • Analog interfaces:

      • 2 × 12-bit SAR ADCs, up to 6 channels

      • 1 × temperature sensor

    • Timers:

      • 2 × 54-bit general-purpose timers

      • 3 × watchdog timers

      • 1 × 52-bit system timer

  • PCB antenna or external antenna connector

Header Block

Note

Not all of the chip pins are exposed to the pin headers.

J1

No.

Name

Type 1

Function

1

GND

G

Ground

2

3V3

P

3.3 V power supply

3

3V3

P

3.3 V power supply

4

IO2

I/O/T

GPIO2 2, ADC1_CH2, FSPIQ

5

IO3

I/O/T

GPIO3, ADC1_CH3

6

GND

G

Ground

7

RST

I

CHIP_PU

8

GND

G

Ground

9

IO0

I/O/T

GPIO0, ADC1_CH0, XTAL_32K_P

10

IO1

I/O/T

GPIO1, ADC1_CH1, XTAL_32K_N

11

IO10

I/O/T

GPIO10, FSPICS0

12

GND

G

Ground

13

5V

P

5 V power supply

14

5V

P

5 V power supply

15

GND

G

Ground

J3

No.

Name

Type 1

Function

1

GND

G

Ground

2

TX

I/O/T

GPIO21, U0TXD

3

RX

I/O/T

GPIO20, U0RXD

4

GND

G

Ground

5

IO9

I/O/T

GPIO9 2

6

IO8

I/O/T

GPIO8 2, RGB LED

7

GND

G

Ground

8

IO7

I/O/T

GPIO7, FSPID, MTDO

9

IO6

I/O/T

GPIO6, FSPICLK, MTCK

10

IO5

I/O/T

GPIO5, ADC2_CH0, FSPIWP, MTDI

11

IO4

I/O/T

GPIO4, ADC1_CH4, FSPIHD, MTMS

12

GND

G

Ground

13

IO18

I/O/T

GPIO18, USB_D-

14

IO19

I/O/T

GPIO19, USB_D+

15

GND

G

Ground
1(1,2)

P: Power supply; I: Input; O: Output; T: High impedance.

2(1,2,3)

GPIO2, GPIO8, and GPIO9 are strapping pins of the ESP32-C3FN4 chip. During the chip’s system reset, the latches of the strapping pins sample the voltage level as strapping bits, and hold these bits until the chip is powered down or shut down.

Pin Layout

ESP32-C3-DevKitM-1 (click to enlarge)

Strapping Pins

Some of the GPIO’s have important features during the booting process. Here is the list of the strapping pins on the ESP32-C3.

GPIO

Default

Function

Pull-up

Pull-down

IO2

N/A

Booting Mode

See ESP32-C3

See ESP32-C3

IO9

Pull-up

Booting Mode

SPI Boot

Download Boot

IO8

N/A

Booting Mode

Don’t Care

Download Boot

IO8

Pull-up

Enabling/Disabling Log Print

See ESP32-C3

See ESP32-C3

For more detailed information, see the ESP32-C3 datasheet.

Resources