Modifying a (Low Speed) PicDem USB Board to Work With (Full Speed) 18F4550 Chips
================================================================================

Steps:

1) Remove the 6 MHz resonator Y4

2) We suggest that you install a DIP oscillator in socket Y3.
20 MHz works with most demo code.

3) Remove pullup resistor R1 (close to USB connector)

4) Either install a 1.5 K-ohm full speed pullup resistor at 
R2, or leave it out and just use the internal pullup resistors 
inside the 18F4550 chip.

5) Microchip did not use a pinout for the ICD connector (J6) pads 
on this board that are compatible with the ICD2, so you will need 
to make some modifications to the back of the PC board.


Original J6 Pinout (VIEWED FROM BOTTOM OF BOARD):

-------------------------------------------------
	RB6		GND		/MCLR	|
	()		()		()	|
	  Pin 5		  Pin 3		  Pin 1	|
						|
						|
RB7		RB3		+5V		|
()		()		()		|
  Pin 6		  Pin 4		  Pin 2		|



MODIFIED J6 Pinout to work with ICD2 (VIEWED FROM BOTTOM OF BOARD):

-------------------------------------------------
	RB6		GND		/MCLR	|
	()		()		()	|
	  Pin 5		  Pin 3		  Pin 1	|
						|
						|
N/C		RB7		+5V		|
()		()		()		|
  Pin 6		  Pin 4		  Pin 2		|

 ^		 ^
 |		 |
 \______________/
	|
   CHANGE THESE 2 PINS (4 & 6) !!!


6) Install an RJ45 modular connector at J6 to fit ICD2 modular cable.