Simple X-tal question
Hi!
Sorry if that sounds dumb. I simply don't understand the data-sheet.
My question is: Can I use a 20MHz x-tal?
Or more general: What's the frequency-range of x-tals that work on the propeller?
Of course, the maximum PLL factor will be 4 with the 20MHz x-tal.
Thanks,
Nick
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Never use force, just go for a bigger hammer!
The DIY Digital-Readout for mills, lathes etc.:
YADRO
Sorry if that sounds dumb. I simply don't understand the data-sheet.
My question is: Can I use a 20MHz x-tal?
Or more general: What's the frequency-range of x-tals that work on the propeller?
Of course, the maximum PLL factor will be 4 with the 20MHz x-tal.
Thanks,
Nick
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Never use force, just go for a bigger hammer!
The DIY Digital-Readout for mills, lathes etc.:
YADRO
Comments
You can use 8Mhz, maybe 10Mhz at tops.
As I recall, the PLL is always 16X and then divided down.
So 20Mhz would overclock at 320Mhz!
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"If you want more fiber, eat the package.· Not enough?· Eat the manual."········
you can use a crystal up to 80MHz, but then you can not use the PLL. If you want to use the PLL then you must use a crystal in the range of 4 - 8MHz. Please refer also the Propeller manual at page 29 to set the right configuration depending from your crystal frequence your are using.
Now I understand the data sheet.
The question arose, not because I can't invest in an 5MHz crystal, but to reduce inventory with a bag of 20MHz x-tals sitting around for an other project.
Thanks,
Nick
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Never use force, just go for a bigger hammer!
The DIY Digital-Readout for mills, lathes etc.:
YADRO