Hi All,
I'm having some trouble programming an 18f452 with the jdm programmer design found here: **broken link removed**.
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
------------------------
MCLR --> MCLR
VDD --> VDD1 and VDD2
GND --> VSS1 and VSS2
PGD --> RB7
PDC --> RB6
PGM --> Floating
I also put a 10k ohm resistor between RB5(pgm) and VSS on the pic.
Using 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?
Thanks for your time!
Stephen