Question on clocks and PLLs

Discussion in 'Embedded Systems and Microcontrollers' started by wannaBinventor, Jan 14, 2011.

  1. wannaBinventor

    Thread Starter Member

    Apr 8, 2010
    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?


    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.
    Last edited: Jan 14, 2011