EX-F320 Standard, C8051F Development Board


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Development Board designed for the C8051F320 microcontroller


A development board for the C8051F320 microcontroller. It is designed to give designers a quick start to develop code on the device.

This development board comes with the C8051F320 chip in LQFP32 package.

What's On Board

  • Power
    • Powered from mini USB port or 5V DC jack, configured via on board switch
    • Power input/output pin headers
      • spare power input
      • convenient for providing power supply to other board/device if necessary
  • Onboard Chips
    • C8051F320 (LQFP32), the C8051F Microcontroller
    • AMS1117-3.3, on board regulator
  • Interfaces
    • JTAG/C2 interface for programming/debuging
    • mini USB interface
    • BUS-A & BUS-B, for connecting to the expansion board DVK501, ease to study/develop various peripheral devices
  • Human to Machine Interface
    • Reset button, used to reset the system
    • Power indicator LED
  • Other Features
    • External crystal configurable
      • there is a jumper for selecting on board 12M crystal or custom crystal mounted via the socket
      • a jumper for configuring MCU pins as oscillator inputs or regular I/O pins
    • All the MCU I/O pins are accessible on expansion connectors for further expansion
    • All the pins are clearly marked on the PCB. These marks provide the basic information on the pins
EX-F320 introduction
  1. Microcontroller
    • C8051F320
    • LQFP32 package
  2. On board regulator
    • AMS1117-3.3
  3. External crystal configuration
    • on-board 12 M crystal on left side
    • custom crystal socket on right side
    • selected via jumper
  4. Power input switch
    • USB or 5V DC
  5. Reset
  6. Power indicator
  7. mini USB interface
  8. 5V DC jack
  9. Peripherals expansion ports
    • for connecting to DVK501
    • header pinout definition is provided
    • easy to develop various peripherals
  1. 10-pin JTAG/C2 interface
    • standard C2 interface
  2. External crystal enable jumper
    • short the jumper to use external crystal
    • open the jumper to config the pins as regular I/O pins
  3. Jumper 3.3VJMP
    • open the jumper when REG0 enabled
    • short the jumper when REG0 disabled
  4. Jumper REGJMP
    • short PWR5V & REGIN when REG0 enabled
    • short REGIN & VDD when REG0 disabled
  5. Pin headers connected to MCU I/O pins
    • marked clearly on the PCB
    • easy for testing and further expansion
  6. Power Input/Output
    • 5V/3.3V
    • power input (spare)
    • power output


Examples that come with this development board will show you how to connect the C8051F microcontroller to other peripheral components or devices and how to develope your prototype device easily. The pictures below show how the EX-F320 works with an expansion board DVK501 and the results of the examples.

Note: The DVK501 and LCD12864 are not included in the price, please browse our store to buy them separately if you need. Click on the image to enlarge.

Displaying text on LCD
Serial/parallel communication example using 74HC164/74HC165
Writing and Reading data from AT24CXX EEPROM via I2C interface

Development Resources

  • User Guide CD
    • CD with software, drivers and examples
  • Schematic Circuit Diagram
    • PDF
  • Examples in C
    • Based on Silabs IDE and Keil
  • Related Software
    • Silabs IDE
    • Keil
  • Datasheets of the chips


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EX-F320 Standard, C8051F Development Board

EX-F320 Standard, C8051F Development Board

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