I'm moving an application from the 18F252 to the 18F2610. I'm trying to
use the internal oscillator at 8 MHz with the PLL. It appears (from
looking at my PWM frequency) that the PLL is not enabled. I'm coding most
of this in C and note that the p18f2610.h file does not have PLLEN in bit
6 of OSCTUNE. I added it to the header file, can see it is set using the
watch window, but stuff still does not look right. Running my 18F252 with
a 10 MHz resonator, I'm getting a PWM frequency of about 157 kHz. The
18F2610 is giving me 31 kHz. If I take the 157 kHz I got with the 252 and
multiply by 0.8 (since the 2610 has an 8 MHz oscillator), and then
multiply by 0.25 (assuming the PLL is not running), I get 31.4 kHz, about
what I'm seeing out of the chip.


Thanks!

Harold
-- 
FCC Rules Online at http://www.hallikainen.com
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