AVR Freaks

Thanks.
Bummer; looks like it's the LPC175x, which is a larger package, and more $$, than we otherwise need.

Does anyone know if any of the newer AVR32's have better PLLs ?

Using the LPC175x PLL calculator, we can hit our 6 possible target frequencies, within 10ppm. (we should need only 3 in the final project)

Here, that's a VCO of 275-550MHz (post Div2), and then a XtalDiv of 5 bits (even tho the data suggests more) and a Freq Multiplier of 9 bits.

The RefFreq needed is from ~780KHZ to ~2-3MHz

So, only a slight improve from the very limited AVR32 design of 4 bits is needed : On the Xtal Div: 5 or 6 bits, and on the VCO Divider : ~9 bits. - and the PLL needs to cope with Ref Frequencies of >= 750KHz.

The LPC family can work down to below 32KHz Fref, and has some modes for 32.768 locking; nice features, but not needed on this design.

They also have a nice CLKOUT divider, that is separate from the CPU Divider, so we can get our targets on a pin, without imposing too many caveats on the core.

If you read carefully, you will see I gave an example of what I need.

The LPC is simply an example, and again, if you read carefully, this is what an _AVR32_ needs, in order to meet what we need :

["So, only a slight improve from the very limited _AVR32_ design of 4 bits is needed : On the Xtal Div: 5 or 6 bits, and on the VCO Divider : ~9 bits. - and the PLL needs to cope with Ref Frequencies of >= 750KHz."]

There, I have given actual bit-counts on the Xtal Div, the VCO div, and the RefFreq, which is as complete info as most need, to design a PLL.

What I asked above, still unanswered, was if any of the upcoming AVRs improved the shortcomings on the PLL ?