I have a test board with two PIC18F452s.
Each has the plug for the ICD2.
At first only one of the 452's would correctly ID.
I found a shorted PC trace on the other, and it ID's and programs correctly.
Now the 452 which did ID doesn't...
I suspected a similar trace failure... nothing, and it measures fine.

I have no capacitors on the MCLR, or PGM data, or PGM clock lines.
(I did have a .1uFd on the MCLR but the ICD2 recommends no cap.)

The 452s are getting a 10 MHz clock.
They are both powered by the same source. (5 volts)

What else could I look for?

  *
  |  __O    Thomas C. Sefranek   WA1RHP@ARRL.NET
  |_-\<,_   Amateur Radio Operator: WA1RHP
  (*)/ (*)  Bicycle mobile on 145.41, PL 74.4

http://hamradio.cmcorp.com/inventory/Inventory.html
http://www.harvardrepeater.org

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