PIC burner wont identify PIC18F452 - solved: shielding of "clk" wire shielding

Testing/Troubleshooting
1

hi there,

i just finished a pic burner and checked the circuit several times.

Though, P18 won’t identify my PIC 18F452-I/P no matter what “interface timing” I use:

this PIC-ID 0xFFE0 is not in database

NO PIC-detected

CP-Blocksize : 4000

Panelgröße : 0000

while checking, both the red and the yellow LEDs are lit for a about half a second. The red one seems to turn off earlier.

i could imagine 3 possible problems

  • there is an error in the circuit –> I can’t find it :slight_smile:
  • my PIC won’t work –> how can I find out?
  • p18 version 1.8 is buggy –> has anyone got an older version?

is the recoginzed PIC-ID correct? 0xFFE0?

if not, where shoul I find the problem?

edit:

  • I used a new cable

  • Voltage corrected down to 12,5V –> same error

  • tried out 3 parallel modes: ECP, EPP, Bi-Directional. Same error, but bidirectional behaves very strange concerning the LEDs

2

problem solved:

according to this text the clock-wire should be protected from interference.

3

Funny, someone had a burner issue last night in the chat, and the first hardware thing I blamed: the cable. It’s often a failing point.

Glad it’s sorted :smiley: