Question on clocks and PLLs

Thread Starter

wannaBinventor

Joined Apr 8, 2010
180
Say you are using a PIC with the PLL to multiply the oscillator frequency.

Say it can use a 4x PLL to multiply the 8Mhz INT OSC to 32Mhz. What is now considered "FOSC?" Is it 32Mhz or 8Mhz?

When a clock speed setting is described as "FOSC/16, is it the 8Mhz / 16 or the 32 Mhz / 16?

Thanks.

EDIT: Two posts in one. I'm trying to learn to 18F. What's the real difference between a LAT and PORT register? I've read some stuff but I don't quite understand it.
 
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