rsmatias
Junior Member level 3
Hi! I've been trying to put a 18F252 to work without success.
Using a crystal of 4MHz the PIC oscillator (OSC2) only starts if I use oscillator mode HS. Is doesn't start with XT mode.
Even using HS mode the PIC only works if I touch with my fingers in the Positive connection (Vdd) near Vdd connection of the PIC. Even so, this "solution" -)) doesn't work perfectly, because it is very unstable.
In the breadboard I have two capacitors, between Vdd and Vss, to filter any possible noise from the power supply.
Anyone else has this problem? It is already my second PIC18F252.
Test program was a flashing LED.
Conditions:
PORT A - All in output mode with A/D disabled.
Brown-out RESET disabled.
Power-up timer disabled
V = 5.06V
Compiled with MPLab v6.10
Programmed with IC-Prog 1.05A
Best Regards,
Rodrigo Matias
Using a crystal of 4MHz the PIC oscillator (OSC2) only starts if I use oscillator mode HS. Is doesn't start with XT mode.
Even using HS mode the PIC only works if I touch with my fingers in the Positive connection (Vdd) near Vdd connection of the PIC. Even so, this "solution" -)) doesn't work perfectly, because it is very unstable.
In the breadboard I have two capacitors, between Vdd and Vss, to filter any possible noise from the power supply.
Anyone else has this problem? It is already my second PIC18F252.
Test program was a flashing LED.
Conditions:
PORT A - All in output mode with A/D disabled.
Brown-out RESET disabled.
Power-up timer disabled
V = 5.06V
Compiled with MPLab v6.10
Programmed with IC-Prog 1.05A
Best Regards,
Rodrigo Matias