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PICDEM™ PIC18 Explorer Demonstration Board User’s Guide

DS51721B-page 6

1.3

PICDEM™ PIC18 EXPLORER DEMONSTRATION BOARD

The PICDEM PIC18 Explorer Demonstration Board has the following hardware

features with each feature’s number corresponding to the number in Figure 1-1 that

shows the feature’s location on the board:

PIC18F8722 microcontroller – The sample, primary microcontroller mounted on

the board.

Male header pins for connecting Plug-In Modules (PIMs). A PIM enables an

alternate PIC18 device to be connected to the board, as the primary

microcontroller.

In-Circuit Debugger (ICD) connector.

Six-pin, PICkit™ 2 connector.

10 k

Ω potentiometer for analog inputs.

Push button switch – For external Reset.

USB connector – For RS-232 communication.

PIC18LF2450 microcontroller – For converting RS-232 communication to USB

protocol for attachment of a host PC.

12 MHz crystal – For the PIC18LF2450 microcontroller.

10. RS-232 DB9 socket and associated hardware – For direct connection to an

RS-232 interface.

11. Jumper J13 for routing RS-232 communication through either the USB port or

the RS-232 socket.

12. Jumper J4 – For selecting between programming the main PIC® device or the

PIC18LF2450, used for USB to RS-232 communication.

13. Switch S4 – For designating the main microcontroller as either the

board-mounted PIC18F8722 or a PIM-mounted microcontroller.

14. LED – For power-on indication.

15. JP1 – For disconnecting the eight display LEDs.

16. Eight LEDs.

17. 32.768 kHz crystal – For Timer1 clock operation.

18. Two push button switches – For external stimulus.

19. Analog temperature sensor, MPC9701A.

20. 25LC256 SPI EEPROM.

21. JP2 – To enable/disable EEPROM.

22. JP3 – To enable/disable LCD.

23. 10 MHz crystal – For the main microcontroller.

24. PICtail™ daughter board connector socket.

25. SPI I/O expander – For LCD display, MCP23S17.

26. Prototype area – For user hardware.

27. LCD display.

28. J2 three-pin, male header – For selecting between a voltage of 3.3V or 5V.

29. J14 four-pin, male header – For use with a PIM, if required, to connect 3.3V or

5V, VIN and ICE MCLR.

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