top of page


Based on a 32-bit Arm® Cortex®-M3 core, the APM32E103xE industrial-grade enhanced MCU is upgraded on the Geehy APM32F103xE series. Its operating frequency can reach 120MHz, the power supply is from 2.0V to 3.6V, and the operating temperature covers -40℃ to +105℃, helping products to operate stably in industrial-grade temperature scenarios. The new APM32E103xE is equipped with rich on-chip resources and can bring better choices for users' applications with enhanced functions and cost-effective performance.



  • Arm® Cortex®-M3 core

  • Operates at frequency of 120MHz


  • Flash 512KB

  • SRAM 128KB

Power Consumption

  • VDD supply range: 0~3.6V

  • VDDA supply range: 2.0~3.6V

  • Backup domain VBAT range: 1.8V~3.6V

  • Supports power-on reset (POR)/power-down reset (PDR)

  • Supports programmable voltage detector


  • 16-bit universal timer: 4

  • 16-bit basic timer: 2

  • 16-bit advanced timer: 2

  • Watchdog timer: 2

  • SysTick: 1

Analog Peripherals

  • 12-bit ADC: 3, external channels: 21

  • 12-bit DAC: 2

  • Internal Temperature Sensor: 1


  • 37/51/80/112 I/Os

  • All I/O are mapped to external interrupt vectors

  • Up to 87 I/Os that tolerate 5V signal inputs

Debug Mode

  • JTAG

  • SWD


  • U(S)ART: 5

  • SPI: 3

  • I2S: 2

  • I2C: 2

  • CAN: 2


  • QFN48

  • LQFP48/64/100/144

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! 
bottom of page