PLL Filter Calculator update

Discussion about SAM7 Series and ARM7TDMI based products.

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stephan_cadene
Contact:
Location: Atmel Corp.
Posts: 163
Joined: Thu Feb 12, 2004 7:48 pm

PLL Filter Calculator update

Fri Aug 25, 2006 1:59 pm

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

http://www.atmel.com/dyn/resources/prod ... R_AT91.xls

- Best Regards -
einstern
Posts: 16
Joined: Thu Jun 08, 2006 11:12 am

PLL Tool not correct for EVB Example

Fri Sep 08, 2006 10:06 pm

DO YOU KNOW,

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?

Regards
Thomas
ftechmax
Posts: 24
Joined: Thu May 18, 2006 2:28 pm

Mon Oct 23, 2006 2:48 pm

Well... it works :D

AT91SAM7XC256-EK
C1 = C26 = 10nF
C2 = C25 = 1nF
R1 = R5 = 1K5

XTAL = 18.432MHz

Core running on a whopping 96MHz...
Image
nickd
Posts: 7
Joined: Wed Oct 04, 2006 6:56 am

Tue Apr 10, 2007 10:01 am

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...

Why?

Nick
bdenis
Contact:
Posts: 48
Joined: Tue Feb 08, 2005 1:56 pm

Tue Apr 10, 2007 10:49 am

It is not allowed because you are below the minimum input frequency of the PLL (refer to the datasheet).

Regards,
Bertrand
nickd
Posts: 7
Joined: Wed Oct 04, 2006 6:56 am

Wed Apr 11, 2007 1:19 am

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.

Cheers,

Nick
fireball
Posts: 43
Joined: Sat Dec 29, 2007 2:04 pm

Tue Jan 22, 2008 1:25 pm

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!
fireball
Posts: 43
Joined: Sat Dec 29, 2007 2:04 pm

Thu Jan 24, 2008 7:12 am

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?

krunal_299@yahoo.co.in
gerhardf
Posts: 552
Joined: Thu Dec 02, 2004 2:28 pm

Thu Jan 24, 2008 8:59 am

hello,
try this link:
http://www.atmel.com/dyn/resources/prod ... R_AT91.zip

regards
gerhard
fireball
Posts: 43
Joined: Sat Dec 29, 2007 2:04 pm

Thu Jan 24, 2008 11:09 am

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.
Regrds!

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