CH32V407/467: 200MHz RISC-V with Dual USB HS, Ethernet PHY, and RVV

WCH's highest-performance connectivity MCU pairs dual 480Mbps USB 2.0 PHY, 100M Ethernet, LTDC display, and RISC-V vector extensions — up to 8MB PSRAM.

CH32V407CH32V467QingKe V3VRVVUSB HSEthernet

Overview

The CH32V407 and CH32V467 are WCH's flagship industrial interconnect microcontrollers, built on the self-designed QingKe V3V RISC-V core running at up to 200MHz with zero-wait-state flash. They are the first WCH MCUs to combine dual USB 2.0 High-Speed PHYs (480Mbps), built-in 10/100M Ethernet PHY, a vector (RVV) extension, and an LCD-TFT display controller on a single RISC-V chip.

Key Specifications

Core	QingKe V3V (RV32IMACV, vector extension)
Max Frequency	200 MHz (zero wait state)
CoreMark/MHz	4.11
Flash	512 KB
SRAM	200 KB
Extended PSRAM	Up to 8 MB (CH32V467 only)
USB 2.0 HS	2x 480 Mbps with built-in PHY (Host + Device)
Ethernet	10/100M MAC + built-in PHY
UART	10x USART/UART
CAN	1x CAN 2.0B Active
ADC	2 units, 12-bit
DAC	2 channels, 12-bit
Display	LTDC + ARGB + DVP camera interface
Storage Interfaces	SDIO, FSMC, QSPI
I/O	Up to 77 GPIOs
Package	LQFP64, QFN68, LQFP100
Operating Voltage	2.9V - 3.6V

Why RVV Matters on an MCU

The CH32V407/467 are among the first mainstream RISC-V MCUs to ship with the RISC-V Vector (RVV) extension. Vector instructions let the same code scale across different vector widths and dramatically accelerate signal processing, graphics, and AI inference on the edge. For developers, this means:

Faster DSP and filtering without hand-optimized assembly
Portable code that works across RVV-enabled RISC-V cores
Future-proof designs as RVV becomes the standard for edge AI

Dual USB 2.0 High-Speed

Most MCUs top out at USB 2.0 Full-Speed (12Mbps) or require an external ULPI PHY for High-Speed. The CH32V407 integrates two 480Mbps USB HS PHYs directly on-chip. This enables designs that previously needed multiple chips:

USB-to-Ethernet dongle with one chip
Dual-role USB hub/controller
High-speed USB audio or video bridge
USB mass storage + USB CDC virtual serial simultaneously

Ethernet + Display + Camera

With built-in Ethernet PHY, LTDC display controller, and DVP camera interface, the CH32V467 can drive Human-Machine Interfaces (HMIs) and network-connected cameras without external Ethernet PHY or display bridge chips. The optional 8MB PSRAM provides enough frame buffer for WVGA or higher-resolution displays.

Application: Networked HMI Terminal

A practical CH32V467 application could be a compact industrial HMI panel:

7" TFT driven by LTDC from PSRAM frame buffer
100M Ethernet for Modbus TCP / MQTT to PLC/SCADA
USB HS for firmware updates and USB devices
SDIO for SD card data logging
10 UARTs for RS-485/Modbus RTU expansion modules

Development Environment

WCH provides the standard toolchain for the CH32V family:

IDE: MounRiver Studio (Eclipse-based, free)
Debugger: WCH-LinkE (single-wire or 2-wire debug)
SDK: Standard Peripheral Library + HAL
Toolchain: GCC RISC-V with vector extension support

Hello GPIO Example

#include "ch32v40x.h"

int main(void) {
    GPIO_InitTypeDef GPIO_InitStructure = {0};

    SystemCoreClockUpdate();
    Delay_Init();

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    while(1) {
        GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_SET);
        Delay_Ms(500);
        GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_RESET);
        Delay_Ms(500);
    }
}

Comparison with CH32V307/317

Feature	CH32V307	CH32V317	CH32V407	CH32V467
Core	QingKe V4F	QingKe V4F	QingKe V3V	QingKe V3V
Frequency	144 MHz	144 MHz	200 MHz	200 MHz
RVV	No	No	Yes	Yes
USB HS PHY	No	1x	2x	2x
Ethernet PHY	External MAC only	10/100M built-in	10/100M built-in	10/100M built-in
Flash / SRAM	256KB / 64KB	256KB / 64KB	512KB / 200KB	512KB / 200KB
PSRAM	No	No	No	Up to 8MB
LTDC	No	No	Yes	Yes