Awesome CH32

An unofficial curated list of WCH's 32-bit MCU related code and resources.

Official Resources

Note Chinese(中文) content are always newer than English version.

• Official Website (Chinese) 南京沁恒微电子股份有限公司
  • BBS: 沁恒微电子社区 - Official Tech Support Forum, English is also acceptable.
• Official Website (English) Nanjing Qinheng Microelectronics
• Download Center, DataSheet, EVT(SDK+Demo Code), Tools, etc.
  • Chinese: 下载资料
  • English: Downloads
  • DS for "DataSheet 数据手册", RM for "Reference Manual 应用手册", EVT for "SDK+Demo Code 开发工具"
  • IC Package and Footprint: SCHPCB.ZIP PACKAGE.PDF
• Github Organization: openwch - organized by MCU series. Documents, code, demo are included.
  • Arduion Support: openwch/arduino_core_ch32
  • OpenOCD (Binary): openwch/openocd_wch
• MCU List: MCU+
• MCU Selection: MCU(CN) MCU(EN)
• MounRiver Studio(IDE): http://www.mounriver.com/
• Debugger Probe: WCH-Link WCH-Link仿真调试器模块
  • WCH-LinkUtility.ZIP
• USB ISP Programmer: WCHISPTool_Setup.exe
  • WCHISPTool_CMD.ZIP for command line under Linux, macOS and Windows.

MCU Families

For 32-bit MCU, WCH has two categories: Cortex-M and RISC-V. Cortex-M product line has not been updated for a long time. (There is a 32-bit unknown instruction set used by CH563/CH561/CH568/CH567).

Official Intro(Chinese)

RISC-V

Note WCH's RISC-V has some key differences from the mainstream RISC-V ISA:

• No mtime and mcycle CSR. No MachineTimer interrupt. Use SYSTICK core peripheral instead.
• No MachineExternal interrupt. The external interrupts are handled the same as core interrupts as mcause code.
• Core interrupts are different, refer "QingKeV*_Processor_Manual.PDF" for details.

Refer: ch32-data

• CH32V General RISC-V
  • CH32V103 RISC-V4A
  • CH32V203 RISC-V4B
  • CH32V208 RISC-V4C, BLE 5.3
  • CH32V303 RISC-V4F, CAN
  • CH32V307/CH32V305 RISC-V4F, USBHS, CAN, DVP, 1000M ETH
  • CH32V317 RISC-V4F, USBHS,1000M ETH, DVP
  • CH32V0 Low Price
    • CH32V003 RISC-V2A
    • CH32V002 RISC-V2C (unreleased) - V003 compatible with bigger SRAM, 12-bit ADC
    • CH32V004 RISC-V2C (unreleased) - V003 compatible with bigger SRAM, 12-bit ADC
    • CH32V006/CH32V005 RISC-V2C (unreleased)
    • CH32V007/CH32M007 RISC-V2C (unreleased) - M for Motor Control DS revoked?
• CH32X0 Special IO
  • CH32X035/CH32X033 RISC-V4C, USB PD(CH32X035), PIOC
• CH32L Low Power
  • CH32L103 RISC-V4C, USB PD, Low Power
• BLE MCU
  • CH573/CH571 RISC-V3A, BLE 4.2
  • CH583/CH582/CH581 RISC-V4A, BLE 5.3
  • CH585/CH584 RISC-V3C, BLE 5.4, USBHS(CH585), NFC
  • CH592/CH591 RISC-V4C, BLE 5.4
  • CH32V208 (also appears in CH32V series)
• Special Interface
  • CH569/CH565 RISC-V3A, USBSS, SerDes, HSPI, BUS8, 1000M ETH
  • CH641 RISC-V2A, USB PD, Wireless Charging
  • CH643 RISC-V4C, RGB LED Driver, USB PD, PIOC
  • CH645 RISC-V4C (unreleased), USBHS, USB Hub, USB PD, 100M ETH
  • CH564 RISC-V4J, USBHS, USB PD, 100M ETH, XBUS, SLV

In the list above CH57x, CH58x, CH59x and CH56x are legacy peripheral ones, which means they have an old style of peripherals.

Cortex-M

• Cortex-M3
  • CH32F1: CH32F103
  • CH32F2:
    • CH32F203/CH32F203C8
    • CH32F207/CH32F205
    • CH32F208 - BLE
• Cortex-M0 - BLE MCU
  • CH578/7
  • CH579