PLL internal oscillator

[redips_id]

Hi all, from the title it is just a simple question, can internal oscillator be boost up? For example I used PIC18F452 and used internal oscillator 8MHz, can I boost up the oscillator using PLL so that the crystal frequency become 32MHz?

[ober]

Hi all, from the title it is just a simple question, can internal oscillator be boost up? For example I used PIC18F452 and used internal oscillator 8MHz, can I boost up the oscillator using PLL so that the crystal frequency become 32MHz?

Yes and No.

Yes, you can use PLL to boost internal oscillator to get higher system clock.

No, because PIC452 does not have internal oscillator. If you are using PIC4520, that is possible.

[redips_id]

Thanks ober, so it same as dsPIC right? For example dsPIC30F4011 have internal oscillator 7.37MHz, so it can be boost up to 16x and be 117.92MHz, right?

[ober]

Yes, that is possible. Under oscillator operation modes, FRC w/PLL 16x will offer you that.