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PLL Filter Calculator update

Posted: Fri Aug 25, 2006 1:59 pm
by stephan_cadene
Hi evrybody,

A new release of the AT91 PLL calculator tool is available:

- introduction of new products
- improve the help of the tools
- display errors corrected ... R_AT91.xls

- Best Regards -

PLL Tool not correct for EVB Example

Posted: Fri Sep 08, 2006 10:06 pm
by einstern

if you put in the figures of the components of the Atmel SAM7 EVB then the tool will be complaining.

ONE of them MUST BE WRONG !!!

What do say?


Posted: Mon Oct 23, 2006 2:48 pm
by ftechmax
Well... it works :D

C1 = C26 = 10nF
C2 = C25 = 1nF
R1 = R5 = 1K5

XTAL = 18.432MHz

Core running on a whopping 96MHz...

Posted: Tue Apr 10, 2007 10:01 am
by nickd
Why can't I select from the full range of MUL and DIV values?

It looks like it's trying to be too clever and limit what I can choose to limit the output frequency, but it seems to be too restrictive.

I'm using the 'SAM7S and 'SAM7X with an 18.432 MHz crystal, and generating a 48MHz clock with MUL = 124 and DIV = 24, which as far as I know is legal (and it works), but this tool won't let me select these values...



Posted: Tue Apr 10, 2007 10:49 am
by bdenis
It is not allowed because you are below the minimum input frequency of the PLL (refer to the datasheet).


Posted: Wed Apr 11, 2007 1:19 am
by nickd
Thanks, this was something that I'd overlooked.

As a suggestion.. perhaps as a means to highlight this, the tool should allow it, but pop up a warning, as it does when you select a MUL that exceeds the maximum system clock.



Posted: Tue Jan 22, 2008 1:25 pm
by fireball
Hi experts!
Sorry to say but this link is not working well.
The file may get damaged.
The file can be downloaded compeletly w/o any interruption but whenever prompted to open it does not get opened , only blank xls page is there.
So kindly have look on it!
Thanks &n Regards!

Posted: Thu Jan 24, 2008 7:12 am
by fireball
Ok folks!
I still can't open this excel page.
Can anyone who have downloaded succesfully this XLS file , forwarded to me at my mailID?

Posted: Thu Jan 24, 2008 8:59 am
by gerhardf
try this link: ...


Posted: Thu Jan 24, 2008 11:09 am
by fireball
Not succeded yet!
other pll calculator files(for other cores) on this link can be opened properly but not this one.
If anyone has at91's pll calculator , pls forward it.