> I am using a PIC18F452 with an external 8MHz crystal. I am trying to
> enable the HS+PLL Enabled mode, the device programs okay, and when
> read back, the configuration values are correct, however, in use, the
> device is still running at 8MHz. I am using MPLAB 6.62 with an ICDII.
> Can anyone suggest a reason why the PLL may not be working.
>
> Thanks
>
> John Lucas
In the ICD2 help file under 18Fxxxx limitations look for the note on Programmer
Limitations for programming the PLL. I think you have to remove power after
programming PLL, then re-apply for the change to take affect.
Assuming you have it set under Configure >>Configuration Bits... HS-PLL Enabled,
it should work.
--
-Bruce
http://www.rentron.com
Reply by John Lucas●October 8, 20042004-10-08
Hi
I am using a PIC18F452 with an external 8MHz crystal. I am trying to
enable the HS+PLL Enabled mode, the device programs okay, and when
read back, the configuration values are correct, however, in use, the
device is still running at 8MHz. I am using MPLAB 6.62 with an ICDII.
Can anyone suggest a reason why the PLL may not be working.
Thanks
John Lucas