I'm slightly confused on what my xtal limit is.
I'm looking at a dsPIC30F5016 and it says that it can go up to 30MIPS and with an oscillator input between 4Mhz-10Mhz with PLL active (4x,8x and 16x)
But looking at Section 7: Oscillator of the Ref Man 1 (pg 7-11), it shows that I can go up to 25Mhz in HS mode.
Can I use a 15Mhz xtal ( with a HS/2 and w/PLL 16x) to give me 120Mhz or am I limited to 7.37Mhz w/ PLL 16x to give me 118Mhz?
If I can use the 15Mhz, is there an advantage or disadvantage to using the freq divder or /2 or /3 ?