AVR-Chat

I'm not sure what you're trying to say here.

My point was that 15 is the correct value for UBRR for a 2.4567 MHz clock as
you pointed out from the data sheet.

 

The value that Brian is using for UBRR is 16 which results in a 3.1% error.

 

Ray

 

 

________________________________

From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
Of John Samperi
Sent: Wednesday, April 09, 2008 2:12 PM
To: AVR-Chat@yahoogroups.com
Subject: RE: [AVR-Chat] Re: comms problem

 

At 02:45 AM 10/04/2008, you wrote:
>For a 2.4567 MHz xtal:
>
> UBRR = (2456700/(16 * 9600)) - 1 = 15

The data sheet shows a xtal frequency of 2.4576 MHz
which I'm ASS-U-MEing is what is being used.

At 9600 baud and a UBRR of 15 it gives 0% error....
unless Atmel's calculators are broken too. :-)

Regards

John Samperi

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