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Oscillator Calibratiom problem

 
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deepakomanna



Joined: 06 Mar 2007
Posts: 92
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Oscillator Calibratiom problem
PostPosted: Wed Mar 14, 2007 9:39 pm     Reply with quote

Dear sir,
here i am using 16f684 with MPLAB 7.5 V & CCS PCM C Compiler, Version 3.249, 34534.


So, My problem is how to assign OSCILLATOR CALIBRATION Freq. to 16f684.
In 12f629 i assign like this,
#byte osccal = 0x90
......
.....

#asm
call 0x03ff
movwf osccal
#endasm
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Mar 14, 2007 10:05 pm     Reply with quote

The 16F684 doesn't have an OSCCAL register, so there is no factory
calibration value at the end of program memory.

It does have an OSCTUNE register, but you don't need to use it.
The internal oscillator is tuned at the Microchip factory. I assume
it's done by laser trimming.
deepakomanna



Joined: 06 Mar 2007
Posts: 92
Location: Pune,India

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thanks
PostPosted: Wed Mar 14, 2007 11:28 pm     Reply with quote

Dear sir,
Thank you very for ur help,now i will go to write my remaining source code.

Thank You,
With Best Regards,
Deepak.
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