Overview

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

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
13. 8 I/Os interface: for connecting accessory boards which using I/O control, such as 8 Push Buttons, Motor, etc.
14. SPI interface: for connecting SPI peripherals, such as DataFlash (AT45DBxx), SD card, MP3, etc.
15. I2C interface: for connecting I2C peripherals, such as I/O expander (PCF8574), EEPROM (AT24Cxx), etc.
16. 1-WIRE interface: for connecting 1-WIRE devices (TO-92 package), such as temperature sensor (DS18B20), electronic registration number (DS2401), etc.
17. UART interface: for connecting UART peripherals, such as RS232, RS485, USB TO UART, etc.
18. PS/2 interface: for connecting PS/2 keyboard and/or mouse
19. Graphic multi-color LCD interface: for connecting multi-color touch screen LCD (included in Package A/B), using SPI interface which requires less I/O pins
20. Character LCD interface: for connecting character LCD, such as LCD1602 (3.3V blue backlight)
21. 5V DC jack
22. Custom crystal socket
23. VCC power input/output: usually used for power supply output, and/or common ground with other application board
24. MCU pins connector: all the MCU pins are accessible on expansion connectors for further expansion
25. ICSP interface: for debugging/programming
26. LEDs jumper
27. User keys jumper
28. Joystick jumper
29. PS/2 jumper
30. 1-WIRE jumper
31. Buzzer jumper
32. IR jumper
33. VCC selection jumper
34. Crystal selection jumper
35. 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.

Photos

Open18F4520 Development Board

Open18F4520 Development Board bottom side

Connecting to touch screen LCD

Connecting to character LCD

Connecting to RS232 Board via UART

Connecting to USB UART Board via UART

Connecting to USB FIFO Board via 16 I/Os interface

Connecting to 8-SEG LED via 16 I/Os interface

8 Push Buttons on the 8 I/Os interface

AD Keypad on the 8 I/Os interface

Connecting to EEPROM Board via I2C

Connecting to RTC Board via I2C

Multi I2C peripheral Module connected to the I2C bus

Connecting to DataFlash Board via SPI

Connecting to Micro SD Board

Connecting to any accessory board you need

Note:
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

Development Resources

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

Wiki: www.waveshare.com/wiki/Open18F4520