EX-F34x-Q48 Premium, C8051F Development Board

SKU: 3870
Part Number: EX-F34x-Q48 Premium
Brand: Waveshare
UPC: 700646946884




A complete starter kit and development system for the C8051F34x series microcontrollers


connecting the two boards

A complete starter kit and development system for the C8051F34x series microcontrollers, such as C8051F340. It is designed to give designers a quick start to develop code on these devices.

This development system contains a main development board with the C8051F340 chip in TQFP48 package, and an additional expansion board with various peripheral devices.

The BUS-A & BUS-B headers located on both boards should be used to connect the two boards via 10-pin cables, which are delivered with the product. As shown in the figure right.

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
    • C8051F340 (TQFP48), 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-F34x-Q48 introduction
  1. Power input switch
    • USB or 5V DC
  2. Power indicator
  3. 10-pin JTAG/C2 port
    • standard C2 interface
  4. Reset
  5. Pin headers connected to MCU pins
    • marked clearly on the PCB
    • easy for testing and further expansion
  6. Power Input/Output
    • 5V/3.3V
    • power input (spare)
    • power output
  7. Peripherals expansion ports
    • for connecting to DVK501
    • header pinout definition is provided
    • easy to develop various peripherals
  8. External crystal configuration
    • on-board 12 M crystal on left side
    • custom crystal interface on right side
    • selected via jumper
  1. External crystal enable jumper
    • short the jumper to use external crystal
    • open the jumper to config the pins as regular I/O pins
  2. Microcontroller
    • C8051F340
    • TQFP48 package
  3. mini USB port
  4. On board regulator
    • AMS1117-3.3
  5. 5V DC jack
  6. REG0 enable/disable jumper
    • REG0 enabled
      • short PWR5V & REGIN
      • open 3.3VJMP
    • REG0 disabled
      • short REGIN & VDD
      • short 3.3VJMP


Device on boardDescriptionInterface
AT24CXX 2-Wire Serial EEPROM keeps data after power down I2C
PCF8563 Real-time clock/calendar, low backup current from battery I2C
PCF8591 8-bit A/D and D/A converter, four channels AD conversion, one channel DA conversion I2C
PCF8574 Remote 8-bit I/O expander I2C
DS18B20 Programmable Resolution 1-Wire Digital Thermometer, measures temperatures from –55°C to +125°C 1-Wire
DS2401 Silicon Serial Number, a low-cost, electronic registration number that provides an absolutely unique identity 1-Wire
AT45DBXX Serial-interface sequential access Flash memory ideally suited for higher memory density requirement SPI
74HC164 8-bit serial-in, parallel-out shift register, for reducing the IO cost SART
74HC165 8-bit parallel-in, serial out shift register, for reducing the IO cost SART
MAX3232 3.0V to 5.5V, True RS-232 Transceivers, for communicating with the PC serial
MAX485 RS-485 Transceiver, for long distance communication serial
PS/2 PS/2 interface, for connecting the keyboard or mouse 2 wires
LED 8-bit status indicator LED, also can be used for displaying simple data 8 wires
Character LCD Connector Used for connecting the character LCD module, such as LCD1602 7 wires or 11 wires
Graphic LCD Connector Used for connecting the Graphic LCD module, such as LCD12864 SPI or 12 wires


Examples that come with this development system 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-F34x-Q48 works with the DVK501 and the results of the examples.

Note: The LCD12864 is not included in the price, please browse our store to buy it separately if you need one. Click on the image to enlarge.

This development board supports 3.3V LCD ONLY.

Displaying text on LCD
Serial/parallel communication example using 74HC164/74HC165
Writing and Reading data from AT24CXX EEPROM via I2C interface
Writing and Reading data from AT45DBXX DATAFLASH via SPI interface
Measuring temperature with DS18B20+ and displaying results on LCD
Sending and receiving data over UART interface using MAX3232
Reading date and time from PCF8563 Real Time Clock
Example of PCF8574 I/O expander
A/D conversion and displaying conversion results on LCD
Sending data from PS/2 keyboard
Sending and receiving data over UART interface using MAX485
registration number identification via 1-wire bus using DS2401

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
Package Content

Weight: 0.346 kg

Quick Overview

Package Contains

EX-F34x-Q48 Package

  1. EX-F34x-Q48
  2. USB type A to Mini-B cable
  3. USB power cable
  4. 4-pin wire x 2
  5. 2-pin wire x 2
  6. User Guide CD

DVK501 Package

  1. DVK501
  2. DS18B20, DS2401
  3. USB power cable (2-pin header) x 2
  4. 10-pin Cable x 2
  5. Accessory Pack
  6. User Guide CD