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CH32V203 RISC-V Board

ET-M16

CH32V203 RISC-V Board

144 MHz RISC-V with USB, CAN and 64 KB flash

AED 19.00

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Download datasheet (PDF)

OverviewKey featuresSpecificationsPerformancePinout

Overview

144 MHz RISC-V with USB, CAN and 64 KB flash

The ET-M16 is built around the WCH CH32V203C8T6 — RISC-V (QingKe V4B) 144MHz, 64KB flash, 20KB RAM, USB FS device/host, CAN.

Two Qwiic / STEMMA QT connectors let you chain it with other boards without soldering, and the 2.54 mm header fits a breadboard.

Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.

Good for

  • Low-cost USB devices
  • CAN experiments
  • Learning RISC-V

Key features

What makes it different

MCU

WCH CH32V203C8T6: RISC-V (QingKe V4B) 144MHz, 64KB flash, 20KB RAM, USB FS device/host, CAN

USB

USB-C; ROM USB ISP bootloader (BOOT0 + RESET, WCHISPTool / wchisp)

I/O

18 GPIO on the header, 12-bit ADC, 2-wire debug (WCH-LinkE), Qwiic at 3.3V

Clock

8MHz crystal

Qwiic / STEMMA QT

Two JST-SH connectors plus a 2.54 mm header — 3.3 V and 5 V hosts.

Open documentation

Schematic, BOM and layout notes published for every board.

Specifications

Technical specifications

Device
MCUWCH CH32V203C8T6: RISC-V (QingKe V4B) 144MHz, 64KB flash, 20KB RAM, USB FS device/host, CAN
USBUSB-C; ROM USB ISP bootloader (BOOT0 + RESET, WCHISPTool / wchisp)
I/O18 GPIO on the header, 12-bit ADC, 2-wire debug (WCH-LinkE), Qwiic at 3.3V
Clock8MHz crystal
Power5V USB-C → AP2112K 3.3V
Board
Size53.3 × 25.4 mm
Mounting4 × M2.5 holes, 2.54 mm from each corner
Connectors2 × Qwiic / STEMMA QT (JST SH 4-pin) · 22-pin 2.54 mm header · USB-C 16P receptacle (USB 2.0) — USB-C (power + native USB / bridge)
Main ICCH32V203C8T6 (LCSC C3001172)
RevisionRev A
Software
LibrariesMounRiver Studio / WCH SDK, Arduino CH32 core, ch32-rs (Rust), PlatformIO

Performance

Speed

CPU clockMaximum core clock from the datasheets.

Pinout

Pin map and connections

CH32V203 RISC-V Board pinout: VBUS, 3V3, GND, NRST, PA0, PA1, PA2, PA3, PA4, PA5, PA6, PA7, PA9, PA10, PB0, PB1, PB10, PB11, PB8, PB9, SDA, SCL
PinNameTypeFunction
1VBUSPower5V from USB-C
23V3Power600mA LDO
3GNDGroundGround
4NRSTControlReset, active low
5PA0GPIOADC0
6PA1GPIOADC1
7PA2GPIOUSART2_TX
8PA3GPIOUSART2_RX
9PA4GPIOSPI1_NSS
10PA5GPIOSPI1_SCK
11PA6GPIOSPI1_MISO
12PA7GPIOSPI1_MOSI
13PA9GPIOUSART1_TX
14PA10GPIOUSART1_RX
15PB0GPIOADC8 / TIM3
16PB1GPIOADC9 / TIM3
17PB10GPIOI2C2_SCL
18PB11GPIOI2C2_SDA
19PB8GPIOCAN_RX (remap)
20PB9GPIOCAN_TX (remap)
21SDAI²CPB7 — I²C1 SDA (Qwiic)
22SCLI²CPB6 — I²C1 SCL (Qwiic)

Qwiic / STEMMA QT pins: GND, VIN, SDA, SCL (same on both connectors).

Mechanical

Dimensions and what's in the box

Board 53.3 × 25.4 mm with M2.5 holes
Top view · 53.3 × 25.4 mm

In the box

  • 1 × ET-M16 CH32V203 RISC-V Board (assembled)
  • 1 × 22-pin 2.54 mm male header, unsoldered

Getting started

  • Plug in a Qwiic / STEMMA QT cable, or solder the header and wire VIN, GND, SDA and SCL
  • Libraries: MounRiver Studio / WCH SDK, Arduino CH32 core, ch32-rs (Rust), PlatformIO

Compare

Which USB microcontroller?

CH32V203 RISC-V Board (this board)This boardET-M11 STM32F411 Dev BoardET-M12 RP2350 Dev BoardET-M15 SAMD21 Mini Board
What it does144 MHz RISC-V with USB, CAN and 64 KB flash100 MHz Cortex-M4F with 512 KB flash, USB-C DFU and QwiicDual Cortex-M33 / RISC-V 150 MHz, 2 MB flash, USB-C, Qwiic48 MHz Cortex-M0+ with native USB, DAC and Qwiic
Interface————
Best forLow-cost USB devicesDSP and fast control loopsPIO tricks and fast I/OUSB HID devices
Price19 AED19 AED49 AED23 AED

Downloads

Documents and design files

PDFET-M16 schematicRev ALCSCCH32V203C8T6 datasheet and stockC3001172
STEP3D modelComing soon

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