[SOLVED] I need help when I Using the internal crystal on pic16f722

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hindawi-sy

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Hello all
I'm trying to write a program to pic16f722
Using the internal crystal frequency 4 Mhz
this program works on Proteus correctly
But when I test it on board it is not work
board
i need any Simple program at this microcontroller for test my microcontroller
Greetings to all of you
 

Just make sure you have these settings:

In the OSCCON register the IRCF bits should be set to 01.
In CONFIG1 register, PPLEN (bit 12) should be 1 and FOSC (bits 2, 1, 0) should be set to either 100 or 101.

Use 100 if you want RA6 and RA7 to be normal I/O pins.
Use 101 if you want RA6 to be a clock output pin and RA7 to be an I/O pin.

Brian.
 
are can you give me small example
it's used internal cristal
example 1 pin on off
for i just where problem
hardwear or my prog
 

What language and compiler/assember are you using?

The attached file should toggle all the PORTB pins about once per second. I do not have any 16F722 here or even a working lab at the moment but the code simulates OK for me.

Brian.
 

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  • testcode.zip
    536 bytes · Views: 100

what programer you are using ? cheak ur config setting b/c some programer do not retrieve config bits
 

The configuration bits are included in the file I posted in #4 but as Aqildad suggests, check your programmer actually uses them. Inferior programmers ignore the configuration and make you set it yourself.

Brian.
 

I use programmed ( top 2049)
I have tried all the possibilities were not successful
I'll try other programmed like (all 100)
and tell you

I use mikroC PRO 4.15

Greetings to you
 
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