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lumstar Newbie
Joined: 11 Nov 2009 Posts: 1
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Posted: Wed Nov 11, 2009 9:49 am Post subject: Can't program PIC18F452 |
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Hello everyone,
I am unable to program a PIC18f452 with a jdm programmer (http://www.obddiag.net/prog2455.html).
I have succesfully programmed a pic16f84a using this programmer and PicPgm spftware, but cannot program an 18f452 chip with it.
The circuit I have connected the icsp to is as follows:
ICSP --> Pic18f452
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MCLR --> MCLR
VDD --> VDD1 and VDD2
GND --> VSS1 and VSS2
PGD --> RB7
PDC --> RB6
PGM --> Floating
I also connected RB5(pgm) and VSS on the pic to ground in series with a 10K resistor.
With this setup, PicPgm cannot identify the pic or program it. Using IC-Prog, verify fails at 0000h meaning nothing was programmed.
Any ideas? What am I doing wrong here? MCLR seems to be above 12V and I have tried and external supply for the VDD (+5V) voltage. Does the PIC18F452 have stricter MCLR voltage requirements than something like the PIC16F84a?
Thanks for your time!
Stephen |
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Alan Site Admin

Joined: 29 Jan 2006 Posts: 1399 Location: Winnipeg, MB
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