AVR baud rate calculator (and fuse calculator)

Computers & Mobile

Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.

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June 19th, 2008

Baud	UBRR	% of error
20 Mhz
300	4166	0.0
600	2082	0.0
1200	1041	0.0
2400	520	0.0
4800	259	0.2
9600	129	0.2
14400	86	0.2
19200	64	0.2
28800	42	0.9
38400	32	1.4
57600	21	1.4
76800	15	1.7
115200	10	1.4

Lady Ada Rants:

Yes, you could always use the datasheet and a calculator. But this sucks so much less.

http://www.wormfood.net/avrbaudcalc.php

Pair it with a AVR fuse calculator and you’ve solved 99% of your problems!