Open18F4520 Standard, PIC Development Board


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PIC development board designed for PIC18F series, features the PIC18F4520 MCU, and integrates various standard interfaces, pretty easy for peripheral expansions.
Open18F4520 development board


Open18F4520 is a PIC development board that features a PIC18F4520 device as the microcontroller. It supports further expansion with various optional accessory boards for specific application. The modular and open design makes it the ideal for starting application development with PIC microcontroller.

What's On Board

Open18F4520 development board on board resource
  1. PIC18F4520-I/P:the high performance PIC MCU which features:
    • Core: PIC 8-bit RISC
    • Operating Frequency: 40MHz Max
    • Operating Voltage: 2-5.5V
    • Package: DIP40
    • I/Os: 36
    • Memories: 32kB Flash, 1536B RAM, 256B EEPROM
    • Communication Interfaces: 1 x MSSP(SPI/I2C), 1 x A/E/UART, 2 x PWM, 8 x ADC
    • Debugging/Programming: ICSP interfaces
  2. AMS1117-3.3: 3.3V voltage regulator
  3. Power switch
  4. Power indicator
  5. LEDs: convenient for indicating I/O status and/or program running state
  6. User keys: for I/O input test and/or program control
  7. Joystick: five positions
  8. Reset button
  9. Buzzer
  10. Infrared receiver
  11. 4M crystal oscillator
  12. 16 I/Os interface | 8-bit AD interface
  • for connecting accessory boards which using I/O control, such as FT245 USB FIFO, 8 SEG LED, etc.
  • there's also 8-bit AD interface can be used for AD testing
8 I/Os interface: for connecting accessory boards which using I/O control, such as 8 Push Buttons, Motor, etc. SPI interface: for connecting SPI peripherals, such as DataFlash (AT45DBxx), SD card, MP3, etc. I2C interface: for connecting I2C peripherals, such as I/O expander (PCF8574), EEPROM (AT24Cxx), etc. 1-WIRE interface: for connecting 1-WIRE devices (TO-92 package), such as temperature sensor (DS18B20), electronic registration number (DS2401), etc. UART interface: for connecting UART peripherals, such as RS232, RS485, USB TO UART, etc. PS/2 interface: for connecting PS/2 keyboard and/or mouse Graphic multi-color LCD interface: for connecting 2.2 inch multi-color touch screen LCD which using SPI control Character LCD interface: for connecting character LCD, such as LCD1602 (3.3V blue backlight) 5V DC jack Custom crystal socket VCC power input/output: usually used for power supply output, and/or common ground with other application board MCU pins connector: all the MCU pins are accessible on expansion connectors for further expansion ICSP interface: for debugging/programming LEDs jumper User keys jumper Joystick jumper PS/2 jumper 1-WIRE jumper Buzzer jumper IR jumper VCC selection jumper Crystal selection jumper RA4 pull-up jumper

For jumper 26-32:

  • short the jumper to connect to I/Os used in example code;
  • open the jumper to connect to other custom pins via jumper wires.



PIC Development Board
Open18F4520 Development Board
PIC Development Board
Connecting to touch screen LCD
PIC Development Board
Connecting to character LCD
PIC Development Board
Connecting to PICkit3
PIC Development Board
Connecting to various peripherals
2.2inch 320x240 Touch LCD
Connecting to touch screen LCD
RS232 Board
Connecting to RS232 Board via UART
PL2303 USB UART Board mini
Connecting to USB UART Board via UART
FT245 USB FIFO Board
Connecting to USB FIFO Board via 16 I/Os interface
8 SEG LED Board
Connecting to 8-SEG LED via 16 I/Os interface
8 Push Buttons
8 Push Buttons on the 8 I/Os interface
AD Keypad
AD Keypad on the 8 I/Os interface
Connecting to EEPROM Board via I2C
PCF8563 RTC Board
Connecting to RTC Board via I2C
I2C cascading x3
Multi I2C peripheral Module connected to the I2C bus
AT45DBXX DataFlash Board
Connecting to DataFlash Board via SPI
Micro SD Board
Connecting to Micro SD Board
Connecting to any accessory board
Connecting to any accessory board you need

The Open18F4520 does NOT integrate any debugging function, a debugger is required.
Accessory boards in the photo are NOT included in the Open18F4520 Standard Package.

ICSP Interface

The figure below shows the header pinouts of ICSP interface

ICSP interface header pinouts

Development Resources

  • Related Software (MPLAB, etc.)
  • Demo Code (examples in C)
  • Schematic (PDF)
  • PIC Development Documentations (Datasheets etc.)


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