| 20 Mhz | ||
| Baud | UBRR | % of error |
|---|---|---|
| 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 |
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!
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