Jan-Erik Soderholm wrote:
> No, the datasheet(s) does.
> 
> See the parameter F11/Fsys (On-Chip VCO System Frequency):
> 
> 18F1230: Min/Max : 16/40 MHz.
> 18F4550: Typ: 96 MHz (*no* min/max specified)

I see :)
you're "deducing" this fact from another one :))
I don't know, of course there may be PLLs which do work @ one fixed 
frequency, and others which can multiply whatever.

I'll try to make a test with a 6MHz XTal.

-- 
Ciao, Dario
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