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ESP32-C3-DevKitM-1.rst

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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