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APM32F103x4x6x8xB Series MCU is based on 32-bit Arm® Cortex®-M3 core, has strong computing efficiency and excellent power efficiency. It is equipped with enhanced external memory controller eMMC to support external expansion of SDRAM. It has enhanced peripheral function to support the simultaneous use of USB and can interfaces. The built-in FPU can effectively improve the speed of single-precision floating-point operation. It has passed China IEC61508 SIL3 certification and USB-IF test, and meets the industrial high-reliability standard. It has been successfully applied in electric bicycle, BMS battery management, sweeper, printer and automobile diagnostic instrument.



  • ARM® Cortex®-M3

  • Frequency 96MHz

  • Support FPU Temperature range:-40℃~+105℃

  • Support IEC61508 SIL2

  • Support USB-IF


  • Flash: 16-128KB

  • SRAM: 6-20KB

Power Consumption

  • Supply voltage: 2.0V~3.6V

  • Built in programmable voltage monitor

  • Support sleep, stop and standby modes

  • VBat supports RTC and backup register power supply


  • 16-bit universal timer: 3

  • 16-bit advanced timer: 1

  • Watchdog timer: 2

  • SysTick: 1

Analog peripherals

  • 12-bit ADC:2,external channels: 16

  • Conversion range: 0~VDAA

  • Internal Temperature Sensor: 1


  • 26/37/51/80 I/Os

  • All I/Os can be mapped to 16 external interrupt controller

  • Almost all I/O tolerates 5V signal input


  • 96-bit non-rewriteable unique identity

  • Support CRC cells

Debug Mode

  • SWD and JTAG interface


  • USART :  3

  • I²C : 2

  • SPI : 2

  • USB: 1

  • CAN: 1

  • QSPI: 1

  • Support using both USB and CAN interfaces


  • LQFP48/64/100

  • QFN36

Documents &Development Tools

Data Sheet
User Manual
Development Board

Geehy Development Boards (including MiniBoard and EvalBoard) are equipped with everything you need to evaluate the APM32 microcontroller. Each kit comes with a variety of pins broken out to 2.54mm headers, USB type B connection, USART connection (DB9) , push buttons, accessible boot pins, and a JTAG/SWD interface for programming. 

Contact our North American team today! 
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