32-bit General Enhanced Cortex-M3 MCU


The CH32F1 is a general-purpose MCU based on 32-bit Cortex-M3 core. The CH32F1 integrates clock security system, multi-level power management, general DMA controller, etc. The CH32F1 provides abundant peripherals, such as 2-channel USB2.0 interface, multi-channel TouchKey, 12-bit DAC converter module, multi-channel 12-bit ADC, timers, CAN communication controller and I2C/USART/SPI, etc.

System Block Diagram


  • Cortex-M3 core, 72MHz system clock frequency.
  • Single-cycle multiplication and hardware division.
  • 20KB SRAM,64KB CodeFlash.
  • Supply voltage: 2.7V-5.5V. GPIO synchronous supply voltage.
  • Low-power modes: sleep/stop/standby.
  • Power-on/power-down reset (POR/PDR).
  • Programmable voltage detector (PVD).
  • 7-channel DMA controller.
  • 12-bit ADC, with conversion time of 1us.
  • 16-channel TouchKey detection.
  • 12-bit DAC.
  • 7 timers.
  • One USB2.0 FullSpeed host/device interface (full-speed and low-speed).
  • One USB2.0 FullSpeed device interface (full-speed and low-speed).
  • One CAN controller (2.0B active).
  • Two I2C interfaces (support SMBus/PMBus).
  • 3 USARTs.
  • 2 SPIs (support Master mode and Slave mode).
  • 51 I/O ports, all I/O ports can be mapped to 16 external interrupts.
  • CRC calculation unit, 96-bit unique ID.
  • Serial debug interface (SWD).
  • Packages: LQFP64M, LQFP48, QFN48.

Product Selection Guide

Technical Resources

  1. Datasheet: CH32F103DS0.PDF,CH32xRM.PDF
  2. CH32F103EVT evaluation board manual and reference routines: CH32F103EVT.ZIP