---
title: CH32V003 DB
description: "## Basic Overview CH32V003 series is an industrial-grade general-purpose microcontroller designed based on QingKe RISC-V2Acore, which supports 48MHz system main frequency in the product function. The series features wide voltage, single line debug, low-power consumption and ultra-small package. It provides…"
url: "https://eicut.com/wiki/development-boards/introduction-to-ch32v003-db/"
updated: "2026-02-15"
category: Development Boards
---

# CH32V003 DB

## Basic Overview

CH32V003 series is an industrial-grade general-purpose microcontroller designed based on QingKe RISC-V2Acore, which supports 48MHz system main frequency in the product function. The series features wide voltage, single line debug, low-power consumption and ultra-small package. It provides commonly used peripheralfunctions, built-in 1 group of DMA controller, 1 group of 10-bit analog-to-digital conversion ADC, 1 group ofop-amp comparator, multiple timers, standard communication interfaces such as USART, I2C, SPI, etc. The rated operating voltage of the product is 3.3V or 5V, and the operating temperature range is -40℃～85℃ industrial-grade.

## Feature List

| Feature | Value | Unit/Note |
| --- | --- | --- |
| **Core** |  |  |
| **CPU** | QingKe 32-bit RISC-V (RV32EC) | Instruction set |
| **Interrupts** | Fast PIC + hardware interrupt stack | — |
| **Nesting** | 2-level | Interrupt nesting |
| **System clock** | 48 | MHz main frequency |
| **Memory** |  |  |
| **SRAM** | 2 | KB volatile data storage |
| **CodeFlash** | 16 | KB program memory |
| **BootLoader** | 1920 | B |
| **System config NVM** | 64 | B non-volatile |
| **User NVM** | 64 | B user-defined |
| **Power management & low-power** |  |  |
| **VDD** | 3.3 / 5 | V supply |
| **Low-power modes** | Sleep, Standby | — |
| **Clock & Reset** |  |  |
| **RC oscillator (HSI)** | 24 | MHz, factory-trimmed |
| **RC oscillator (LSI)** | 128 | KHz |
| **External oscillator** | 4–25 | MHz high-speed crystal |
| **Reset/voltage** | POR/PDR + PVD | Power on/down reset, programmable voltage detector |
| **DMA & Analog** |  |  |
| **DMA** | 1 group, 7 channels | Ring buffer; TIMx/ADC/USART/I2C/SPI |
| **OPA & comparator** | 1 group | Connected to ADC & TIM2 |
| **ADC** | 10-bit | 0–VDD; 8 external + 2 internal; external delayed trigger |
| **Timers** |  |  |
| **Advanced timer** | 1 × 16-bit | Dead-zone, emergency brake, complementary PWM |
| **General-purpose timer** | 1 × 16-bit | IC/OC/PWM/pulse counting/incremental encoder |
| **Watchdogs** | 2 | Independent + window watchdog |
| **SysTick** | 32-bit | Counter |
| **Communication interfaces** |  |  |
| **USART** | 1 | — |
| **I2C** | 1 | — |
| **SPI** | 1 | — |
| **GPIO** |  |  |
| **Ports** | 3 groups / 18 I/O | — |
| **EXTI** | 1 | Mapped external interrupt |
| **Security / Debug / Package** |  |  |
| **Unique ID** | 64-bit | — |
| **Debug** | 1-wire SDI | Serial debug interface |
| **Package** | SOP / TSSOP / QFN | — |

## Board Resources

### Function Description

The detailed assignment of the peripheral interfaces on the Development board is as follows:

 

![CH32V003 DB pin headers](https://eicut.com/wp-content/uploads/2025/10/image1-1-1-1024x807.webp)
**EICUT CH32V003 DB top view**

 

| NO. | Name | Silkscreen | Comment |
| --- | --- | --- | --- |
| **1** | Programing pin | – | You can program the development board with the one-wire protocol. |
| **2** | 11 pin | – | Ch32v Output pin |
| **3** | 3 pin | – | select voltage power supply 3.3V,5V |

**The Development board has 2 functional indication LEDs, as follows:**

-  Connect to PC0(10) pin wch.
-  Power indication LED.

### Development Board Interfaces

The main pin placement of the Development board is shown in the following figure:

![EICUT CH32V003 DB pinout](https://eicut.com/wp-content/uploads/2025/10/image3-1-1-1024x577.webp)
**Pin functions labeled**

 

| SOP16 | TSSOP20 | QFN20 | SOP8 | Pin name | Pin type (1) | I/O structure | Main function (after reset) | Default alternate function |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| – | – | 0 | – | VSS | P | VSS | – | – |
| 8 | 1 | 18 | 8 | PD4 | I/O | PD4 | UCK/T2CH1ETR/A7/OPO | TICH4ETR_(1) |
| 9 | 2 | 19 | 8 | PD5 | I/O | PD5 | UTX/A5 | T2CH4_/URX_ |
| 10 | 3 | 20 | 1 | PD6 | I/O | PD6 | URX/A6 | T2CH3_/UTX_ |
| 11 | 4 | 1 | – | PD7 | I/O | PD7 | NRST/T2CH4/OPP1 | UCK_ |
| 12 | 5 | 2 | 1 | PA1 | I/O | PA1 | T1CH2/A1/OPN0 | OSCI |
| 13 | 6 | 3 | 3 | PA2 | I/O | PA2 | TICH2N/A0/OPP0 | OSCO/AETR2_ |
| 14 | 7 | 4 | 2 | VSS | P | VSS | – | – |
| – | 8 | 5 | – | PD0 | I/O | PD0 | TICH1N/OPN1 | SDA_/UTX_ |
| 15 | 9 | 6 | 4 | VDD | P | VDD | – | – |
| 16 | 10 | 7 | – | PC0 | I/O | PC0 | T2CH3 | NSS_/UTX_/T1CH3_ |
| 1 | 11 | 8 | 5 | PC1 | I/O/FT | PC1 | SDA/NSS | T1BKIN_/T2CH4_/T2CH1ETR_/URX_ |
| 2 | 12 | 9 | 6 | PC2 | I/O/FT | PC2 | SCL/URTS/T1BKIN | AETR_/T2CH2_/T1ETR_ |
| 3 | 13 | 10 | – | PC3 | I/O | PC3 | T1CH3 | T1CH1N_/UCTS_ |
| 4 | 14 | 11 | 7 | PC4 | I/O | PC4 | T1CH4/MCO/A2 | T1CH1CH2N_(2) |
| – | 15 | 12 | – | PC5 | I/O/FT | PC5 | SCK/T1ETR | T2CH1ETR_/SCL_/UCK_/T1CH3_ |
| 5 | 16 | 13 | – | PC6 | I/O/FT | PC6 | MOSI | T1CH1CH3N_(3)/UCTS_/SDA_ |
| 6 | 17 | 14 | – | PC7 | I/O | PC7 | MISO | T1CH2_/URTS_/T2CH2_ |
| 7 | 18 | 15 | 8 | PD1 | I/O | PD1 | SWIO/T1CH3N/AETR2 | SCL_/URX_ |
| – | 19 | 16 | – | PD2 | I/O | PD2 | T1CH1/A3 | T2CH3_/T1CH2N_ |
| – | 20 | 17 | – | PD3 | I/O | PD3 | A4/T2CH2/AETR/UCTS | T1CH4_ |

## Development Board Dimensions

![Dimension EICUT CH32V003 DB ](https://eicut.com/wp-content/uploads/2025/10/image2-1-1.webp)
**Dimensioned top view in millimeters: 36×20 mm**

## Getting Started Preparation

To program this series of RISC_V microcontrollers, we use the MounRiver Studio software, abbreviated as MRS.

To download this IDE, you can visit the MounRiver Studio website below

  🔗MounRiver Studio software

[**Download MounRiver Studio software**](http://www.mounriver.com/download)

This IDE has the ability to program WCH chips internally; but if you want to use external software for programming, you can use the WCH-LinkUtility software, which can be downloaded from the WCH company website.

  🔗WCH-LinkUtility software

**[Download WCH-LinkUtility](https://www.wch.cn/downloads/WCH-LinkUtility_ZIP.html)**

To connect the programmer to the micro, the GND -> GND and SWDIO -> SWDIO and +5 -> VDD pins must be connected together. If the circuit connected to the micro draws a small current, you can supply the IC power from the programmer itself.

## Resource Download

- [CH32V003 (Board library for Altium Designer)](https://eicut.com/wp-content/uploads/2025/10/CH32V003.zip)
- [DB Shematic (PDF)](https://eicut.com/wp-content/uploads/2025/10/shematicPDF.pdf)
- [WCH CH32V003F4P6 Datasheet (PDF)](https://eicut.com/wp-content/uploads/2025/10/WCH-CH32V003F4P6.pdf)

## FAQ

    What is the CH32V003 Mini Development Board?

A tiny, ultra-low-cost development board based on the **WCH CH32V003** — the world’s cheapest 32-bit RISC-V microcontroller with **48 MHz**, **2 KB SRAM**, **16 KB Flash**, and full set of peripherals.

    What core and clock speed does it use?

**QingKe V2A 32-bit RISC-V (RV32EC)** core running at up to **48 MHz**.

    What power supply voltage is supported?

The board has a jumper to select **3.3 V** or **5 V** operation. The CH32V003 itself accepts **2.7–5.5 V** directly.

    How do I program the CH32V003?

Using the **single-wire debug (SWIO)** interface:
 • Connect a **WCH-LinkE / WCH-Link** or any compatible programmer to **GND + SWIO** pins
 • Use **MounRiver Studio** (recommended) or **WCH-LinkUtility**

    Is USB-C used for programming?

No — the USB-C port is only for **power supply**. Programming is done via the **1-wire SWIO** header.

    Which peripherals are available?

• **1× USART**, **1× I²C**, **1× SPI**
 • **10-bit ADC** (8 ext + 2 int channels)
 • **1× Op-amp + comparator**
 • **1× Advanced timer** (16-bit with complementary PWM)
 • **1× General-purpose timer**, **DMA**, **Watchdogs**

    How many GPIO pins are accessible?

**Up to 18 GPIO** pins are brought out on the two 11-pin 2.54 mm headers (depending on package variant used).

    What are the board dimensions?

Extremely small: **36 × 20 mm** — perfect for breadboard or direct soldering into final products.

    What development environment should I use?

Recommended: **MounRiver Studio** (free, official IDE from WCH).
 Alternative: Arduino-style programming via **ch32v003duino** or PlatformIO is also possible.

    Does it have a built-in LED?

Yes — one user LED connected to **PC0** and one power LED.

[![CH32V003 Mini Development Board](https://eicut.com/wp-content/uploads/2025/10/Frame-32_11zon-273x300.webp)](https://eicut.com/product/ch32v003-mini-development-board/)