Not WormFood's AVR Baud Rate Calculator
For many years I have been using Wormfood's Baud Rate Calculator which used to be available under
http://wormfood.net/avrbaudcalc. But since a couple
of months this site has been down and there only a few hardcopies and a partly functional copy
preserved on the net.
Today, 2019-11-17, I dusted off my php-knowledge and recreated the functionality from scratch. On
this page you can either refer to common standard values for CPU frequencies for the Microchip AVR
series of microcontrollers, or enter your own frequency of choice.
As a result you will see the achievable standard bit rates (aka Baud rates) using the hardware UART
in these microcontrollers and you can see why a communication might not work - if the bit rate error
simply is too big.
AVR Bit Rate Calculator
| fosc = 1 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 207 | 300 | 0.0% | 416 | 300 | 0.0% |
| 600 | 103 | 601 | 0.2% | 207 | 601 | 0.2% |
| 1200 | 51 | 1202 | 0.2% | 103 | 1202 | 0.2% |
| 2400 | 25 | 2404 | 0.2% | 51 | 2404 | 0.2% |
| 4800 | 12 | 4808 | 0.2% | 25 | 4808 | 0.2% |
| 9600 | 6 | 8929 | -7.0% | 12 | 9615 | 0.2% |
| 14400 | 3 | 15625 | 8.5% | 8 | 13889 | -3.5% |
| 19200 | 2 | 20833 | 8.5% | 6 | 17857 | -7.0% |
| 28800 | 1 | 31250 | 8.5% | 3 | 31250 | 8.5% |
| 57600 | 0 | 62500 | 8.5% | 1 | 62500 | 8.5% |
| 76800 | 0 | 62500 | -18.6% | 1 | 62500 | -18.6% |
| 115200 | 0 | 62500 | -45.7% | 0 | 125000 | 8.5% |
| 128000 | 0 | 62500 | -51.2% | 0 | 125000 | -2.3% |
| 230400 | 0 | 62500 | -72.9% | 0 | 125000 | -45.7% |
| 256000 | 0 | 62500 | -75.6% | 0 | 125000 | -51.2% |
| Legend: |
|---|
| UBRR out of range |
| bit rate perfectly matched |
| bit rate error less than 1 % |
| bit rate error less than 2 % |
| bit rate error less than 3 % |
| bit rate error less than 4 % |
| bit rate error larger than 4 % |
Standard clock frequencies
| fosc = 32 768 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 6 | 293 | -2.3% | 13 | 293 | -2.3% |
| 600 | 2 | 683 | 13.8% | 6 | 585 | -2.5% |
| 1200 | 1 | 1024 | -14.7% | 2 | 1365 | 13.8% |
| 2400 | 0 | 2048 | -14.7% | 1 | 2048 | -14.7% |
| 4800 | 0 | 2048 | -57.3% | 0 | 4096 | -14.7% |
| 9600 | 0 | 2048 | -78.7% | 0 | 4096 | -57.3% |
| 14400 | 0 | 2048 | -85.8% | 0 | 4096 | -71.6% |
| 19200 | 0 | 2048 | -89.3% | 0 | 4096 | -78.7% |
| 28800 | 0 | 2048 | -92.9% | 0 | 4096 | -85.8% |
| 57600 | 0 | 2048 | -96.4% | 0 | 4096 | -92.9% |
| 76800 | 0 | 2048 | -97.3% | 0 | 4096 | -94.7% |
| 115200 | 0 | 2048 | -98.2% | 0 | 4096 | -96.4% |
| 128000 | 0 | 2048 | -98.4% | 0 | 4096 | -96.8% |
| 230400 | 0 | 2048 | -99.1% | 0 | 4096 | -98.2% |
| 256000 | 0 | 2048 | -99.2% | 0 | 4096 | -98.4% |
| fosc = 128 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 26 | 296 | -1.3% | 52 | 302 | 0.7% |
| 600 | 12 | 615 | 2.5% | 26 | 593 | -1.2% |
| 1200 | 6 | 1143 | -4.8% | 12 | 1231 | 2.6% |
| 2400 | 2 | 2667 | 11.1% | 6 | 2286 | -4.8% |
| 4800 | 1 | 4000 | -16.7% | 2 | 5333 | 11.1% |
| 9600 | 0 | 8000 | -16.7% | 1 | 8000 | -16.7% |
| 14400 | 0 | 8000 | -44.4% | 0 | 16000 | 11.1% |
| 19200 | 0 | 8000 | -58.3% | 0 | 16000 | -16.7% |
| 28800 | 0 | 8000 | -72.2% | 0 | 16000 | -44.4% |
| 57600 | 0 | 8000 | -86.1% | 0 | 16000 | -72.2% |
| 76800 | 0 | 8000 | -89.6% | 0 | 16000 | -79.2% |
| 115200 | 0 | 8000 | -93.1% | 0 | 16000 | -86.1% |
| 128000 | 0 | 8000 | -93.8% | 0 | 16000 | -87.5% |
| 230400 | 0 | 8000 | -96.5% | 0 | 16000 | -93.1% |
| 256000 | 0 | 8000 | -96.9% | 0 | 16000 | -93.8% |
| fosc = 1 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 207 | 300 | 0.0% | 416 | 300 | 0.0% |
| 600 | 103 | 601 | 0.2% | 207 | 601 | 0.2% |
| 1200 | 51 | 1202 | 0.2% | 103 | 1202 | 0.2% |
| 2400 | 25 | 2404 | 0.2% | 51 | 2404 | 0.2% |
| 4800 | 12 | 4808 | 0.2% | 25 | 4808 | 0.2% |
| 9600 | 6 | 8929 | -7.0% | 12 | 9615 | 0.2% |
| 14400 | 3 | 15625 | 8.5% | 8 | 13889 | -3.5% |
| 19200 | 2 | 20833 | 8.5% | 6 | 17857 | -7.0% |
| 28800 | 1 | 31250 | 8.5% | 3 | 31250 | 8.5% |
| 57600 | 0 | 62500 | 8.5% | 1 | 62500 | 8.5% |
| 76800 | 0 | 62500 | -18.6% | 1 | 62500 | -18.6% |
| 115200 | 0 | 62500 | -45.7% | 0 | 125000 | 8.5% |
| 128000 | 0 | 62500 | -51.2% | 0 | 125000 | -2.3% |
| 230400 | 0 | 62500 | -72.9% | 0 | 125000 | -45.7% |
| 256000 | 0 | 62500 | -75.6% | 0 | 125000 | -51.2% |
| fosc = 1 843 200 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 383 | 300 | 0.0% | 767 | 300 | 0.0% |
| 600 | 191 | 600 | 0.0% | 383 | 600 | 0.0% |
| 1200 | 95 | 1200 | 0.0% | 191 | 1200 | 0.0% |
| 2400 | 47 | 2400 | 0.0% | 95 | 2400 | 0.0% |
| 4800 | 23 | 4800 | 0.0% | 47 | 4800 | 0.0% |
| 9600 | 11 | 9600 | 0.0% | 23 | 9600 | 0.0% |
| 14400 | 7 | 14400 | 0.0% | 15 | 14400 | 0.0% |
| 19200 | 5 | 19200 | 0.0% | 11 | 19200 | 0.0% |
| 28800 | 3 | 28800 | 0.0% | 7 | 28800 | 0.0% |
| 57600 | 1 | 57600 | 0.0% | 3 | 57600 | 0.0% |
| 76800 | 1 | 57600 | -25.0% | 2 | 76800 | 0.0% |
| 115200 | 0 | 115200 | 0.0% | 1 | 115200 | 0.0% |
| 128000 | 0 | 115200 | -10.0% | 1 | 115200 | -10.0% |
| 230400 | 0 | 115200 | -50.0% | 0 | 230400 | 0.0% |
| 256000 | 0 | 115200 | -55.0% | 0 | 230400 | -10.0% |
| fosc = 2 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 416 | 300 | 0.0% | 832 | 300 | 0.0% |
| 600 | 207 | 601 | 0.2% | 416 | 600 | 0.0% |
| 1200 | 103 | 1202 | 0.2% | 207 | 1202 | 0.2% |
| 2400 | 51 | 2404 | 0.2% | 103 | 2404 | 0.2% |
| 4800 | 25 | 4808 | 0.2% | 51 | 4808 | 0.2% |
| 9600 | 12 | 9615 | 0.2% | 25 | 9615 | 0.2% |
| 14400 | 8 | 13889 | -3.5% | 16 | 14706 | 2.1% |
| 19200 | 6 | 17857 | -7.0% | 12 | 19231 | 0.2% |
| 28800 | 3 | 31250 | 8.5% | 8 | 27778 | -3.5% |
| 57600 | 1 | 62500 | 8.5% | 3 | 62500 | 8.5% |
| 76800 | 1 | 62500 | -18.6% | 2 | 83333 | 8.5% |
| 115200 | 0 | 125000 | 8.5% | 1 | 125000 | 8.5% |
| 128000 | 0 | 125000 | -2.3% | 1 | 125000 | -2.3% |
| 230400 | 0 | 125000 | -45.7% | 0 | 250000 | 8.5% |
| 256000 | 0 | 125000 | -51.2% | 0 | 250000 | -2.3% |
| fosc = 2 457 600 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 511 | 300 | 0.0% | 1023 | 300 | 0.0% |
| 600 | 255 | 600 | 0.0% | 511 | 600 | 0.0% |
| 1200 | 127 | 1200 | 0.0% | 255 | 1200 | 0.0% |
| 2400 | 63 | 2400 | 0.0% | 127 | 2400 | 0.0% |
| 4800 | 31 | 4800 | 0.0% | 63 | 4800 | 0.0% |
| 9600 | 15 | 9600 | 0.0% | 31 | 9600 | 0.0% |
| 14400 | 10 | 13964 | -3.0% | 20 | 14629 | 1.6% |
| 19200 | 7 | 19200 | 0.0% | 15 | 19200 | 0.0% |
| 28800 | 4 | 30720 | 6.7% | 10 | 27927 | -3.0% |
| 57600 | 2 | 51200 | -11.1% | 4 | 61440 | 6.7% |
| 76800 | 1 | 76800 | 0.0% | 3 | 76800 | 0.0% |
| 115200 | 0 | 153600 | 33.3% | 2 | 102400 | -11.1% |
| 128000 | 0 | 153600 | 20.0% | 1 | 153600 | 20.0% |
| 230400 | 0 | 153600 | -33.3% | 0 | 307200 | 33.3% |
| 256000 | 0 | 153600 | -40.0% | 0 | 307200 | 20.0% |
| fosc = 3 072 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 639 | 300 | 0.0% | 1279 | 300 | 0.0% |
| 600 | 319 | 600 | 0.0% | 639 | 600 | 0.0% |
| 1200 | 159 | 1200 | 0.0% | 319 | 1200 | 0.0% |
| 2400 | 79 | 2400 | 0.0% | 159 | 2400 | 0.0% |
| 4800 | 39 | 4800 | 0.0% | 79 | 4800 | 0.0% |
| 9600 | 19 | 9600 | 0.0% | 39 | 9600 | 0.0% |
| 14400 | 12 | 14769 | 2.6% | 26 | 14222 | -1.2% |
| 19200 | 9 | 19200 | 0.0% | 19 | 19200 | 0.0% |
| 28800 | 6 | 27429 | -4.8% | 12 | 29538 | 2.6% |
| 57600 | 2 | 64000 | 11.1% | 6 | 54857 | -4.8% |
| 76800 | 2 | 64000 | -16.7% | 4 | 76800 | 0.0% |
| 115200 | 1 | 96000 | -16.7% | 2 | 128000 | 11.1% |
| 128000 | 1 | 96000 | -25.0% | 2 | 128000 | 0.0% |
| 230400 | 0 | 192000 | -16.7% | 1 | 192000 | -16.7% |
| 256000 | 0 | 192000 | -25.0% | 1 | 192000 | -25.0% |
| fosc = 3 276 800 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 682 | 300 | 0.0% | 1364 | 300 | 0.0% |
| 600 | 340 | 601 | 0.2% | 682 | 600 | 0.0% |
| 1200 | 170 | 1198 | -0.2% | 340 | 1201 | 0.1% |
| 2400 | 84 | 2409 | 0.4% | 170 | 2395 | -0.2% |
| 4800 | 42 | 4763 | -0.8% | 84 | 4819 | 0.4% |
| 9600 | 20 | 9752 | 1.6% | 42 | 9526 | -0.8% |
| 14400 | 13 | 14629 | 1.6% | 27 | 14629 | 1.6% |
| 19200 | 10 | 18618 | -3.0% | 20 | 19505 | 1.6% |
| 28800 | 6 | 29257 | 1.6% | 13 | 29257 | 1.6% |
| 57600 | 3 | 51200 | -11.1% | 6 | 58514 | 1.6% |
| 76800 | 2 | 68267 | -11.1% | 4 | 81920 | 6.7% |
| 115200 | 1 | 102400 | -11.1% | 3 | 102400 | -11.1% |
| 128000 | 1 | 102400 | -20.0% | 2 | 136533 | 6.7% |
| 230400 | 0 | 204800 | -11.1% | 1 | 204800 | -11.1% |
| 256000 | 0 | 204800 | -20.0% | 1 | 204800 | -20.0% |
| fosc = 3 579 545 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 745 | 300 | 0.0% | 1490 | 300 | 0.0% |
| 600 | 372 | 600 | 0.0% | 745 | 600 | 0.0% |
| 1200 | 185 | 1203 | 0.2% | 372 | 1200 | 0.0% |
| 2400 | 92 | 2406 | 0.2% | 185 | 2406 | 0.2% |
| 4800 | 46 | 4760 | -0.8% | 92 | 4811 | 0.2% |
| 9600 | 22 | 9727 | 1.3% | 46 | 9520 | -0.8% |
| 14400 | 15 | 13983 | -2.9% | 30 | 14434 | 0.2% |
| 19200 | 11 | 18643 | -2.9% | 22 | 19454 | 1.3% |
| 28800 | 7 | 27965 | -2.9% | 15 | 27965 | -2.9% |
| 57600 | 3 | 55930 | -2.9% | 7 | 55930 | -2.9% |
| 76800 | 2 | 74574 | -2.9% | 5 | 74574 | -2.9% |
| 115200 | 1 | 111861 | -2.9% | 3 | 111861 | -2.9% |
| 128000 | 1 | 111861 | -12.6% | 2 | 149148 | 16.5% |
| 230400 | 0 | 223722 | -2.9% | 1 | 223722 | -2.9% |
| 256000 | 0 | 223722 | -12.6% | 1 | 223722 | -12.6% |
| fosc = 3 686 400 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 767 | 300 | 0.0% | 1535 | 300 | 0.0% |
| 600 | 383 | 600 | 0.0% | 767 | 600 | 0.0% |
| 1200 | 191 | 1200 | 0.0% | 383 | 1200 | 0.0% |
| 2400 | 95 | 2400 | 0.0% | 191 | 2400 | 0.0% |
| 4800 | 47 | 4800 | 0.0% | 95 | 4800 | 0.0% |
| 9600 | 23 | 9600 | 0.0% | 47 | 9600 | 0.0% |
| 14400 | 15 | 14400 | 0.0% | 31 | 14400 | 0.0% |
| 19200 | 11 | 19200 | 0.0% | 23 | 19200 | 0.0% |
| 28800 | 7 | 28800 | 0.0% | 15 | 28800 | 0.0% |
| 57600 | 3 | 57600 | 0.0% | 7 | 57600 | 0.0% |
| 76800 | 2 | 76800 | 0.0% | 5 | 76800 | 0.0% |
| 115200 | 1 | 115200 | 0.0% | 3 | 115200 | 0.0% |
| 128000 | 1 | 115200 | -10.0% | 3 | 115200 | -10.0% |
| 230400 | 0 | 230400 | 0.0% | 1 | 230400 | 0.0% |
| 256000 | 0 | 230400 | -10.0% | 1 | 230400 | -10.0% |
| fosc = 3 932 160 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 818 | 300 | 0.0% | 1637 | 300 | 0.0% |
| 600 | 409 | 599 | -0.2% | 818 | 600 | 0.0% |
| 1200 | 204 | 1199 | -0.1% | 409 | 1199 | -0.1% |
| 2400 | 101 | 2409 | 0.4% | 204 | 2398 | -0.1% |
| 4800 | 50 | 4819 | 0.4% | 101 | 4819 | 0.4% |
| 9600 | 25 | 9452 | -1.5% | 50 | 9638 | 0.4% |
| 14400 | 16 | 14456 | 0.4% | 33 | 14456 | 0.4% |
| 19200 | 12 | 18905 | -1.5% | 25 | 18905 | -1.5% |
| 28800 | 8 | 27307 | -5.2% | 16 | 28913 | 0.4% |
| 57600 | 3 | 61440 | 6.7% | 8 | 54613 | -5.2% |
| 76800 | 2 | 81920 | 6.7% | 5 | 81920 | 6.7% |
| 115200 | 1 | 122880 | 6.7% | 3 | 122880 | 6.7% |
| 128000 | 1 | 122880 | -4.0% | 3 | 122880 | -4.0% |
| 230400 | 0 | 245760 | 6.7% | 1 | 245760 | 6.7% |
| 256000 | 0 | 245760 | -4.0% | 1 | 245760 | -4.0% |
| fosc = 4 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 832 | 300 | 0.0% | 1666 | 300 | 0.0% |
| 600 | 416 | 600 | 0.0% | 832 | 600 | 0.0% |
| 1200 | 207 | 1202 | 0.2% | 416 | 1199 | -0.1% |
| 2400 | 103 | 2404 | 0.2% | 207 | 2404 | 0.2% |
| 4800 | 51 | 4808 | 0.2% | 103 | 4808 | 0.2% |
| 9600 | 25 | 9615 | 0.2% | 51 | 9615 | 0.2% |
| 14400 | 16 | 14706 | 2.1% | 34 | 14286 | -0.8% |
| 19200 | 12 | 19231 | 0.2% | 25 | 19231 | 0.2% |
| 28800 | 8 | 27778 | -3.5% | 16 | 29412 | 2.1% |
| 57600 | 3 | 62500 | 8.5% | 8 | 55556 | -3.5% |
| 76800 | 2 | 83333 | 8.5% | 6 | 71429 | -7.0% |
| 115200 | 1 | 125000 | 8.5% | 3 | 125000 | 8.5% |
| 128000 | 1 | 125000 | -2.3% | 3 | 125000 | -2.3% |
| 230400 | 0 | 250000 | 8.5% | 1 | 250000 | 8.5% |
| 256000 | 0 | 250000 | -2.3% | 1 | 250000 | -2.3% |
| fosc = 4 194 304 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 873 | 300 | 0.0% | 1747 | 300 | 0.0% |
| 600 | 436 | 600 | 0.0% | 873 | 600 | 0.0% |
| 1200 | 217 | 1202 | 0.2% | 436 | 1200 | 0.0% |
| 2400 | 108 | 2405 | 0.2% | 217 | 2405 | 0.2% |
| 4800 | 54 | 4766 | -0.7% | 108 | 4810 | 0.2% |
| 9600 | 26 | 9709 | 1.1% | 54 | 9533 | -0.7% |
| 14400 | 17 | 14564 | 1.1% | 35 | 14564 | 1.1% |
| 19200 | 13 | 18725 | -2.5% | 26 | 19418 | 1.1% |
| 28800 | 8 | 29127 | 1.1% | 17 | 29127 | 1.1% |
| 57600 | 4 | 52429 | -9.0% | 8 | 58254 | 1.1% |
| 76800 | 2 | 87381 | 13.8% | 6 | 74898 | -2.5% |
| 115200 | 1 | 131072 | 13.8% | 4 | 104858 | -9.0% |
| 128000 | 1 | 131072 | 2.4% | 3 | 131072 | 2.4% |
| 230400 | 0 | 262144 | 13.8% | 1 | 262144 | 13.8% |
| 256000 | 0 | 262144 | 2.4% | 1 | 262144 | 2.4% |
| fosc = 4 433 619 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 923 | 300 | 0.0% | 1846 | 300 | 0.0% |
| 600 | 461 | 600 | 0.0% | 923 | 600 | 0.0% |
| 1200 | 230 | 1200 | 0.0% | 461 | 1200 | 0.0% |
| 2400 | 114 | 2410 | 0.4% | 230 | 2399 | -0.0% |
| 4800 | 57 | 4778 | -0.5% | 114 | 4819 | 0.4% |
| 9600 | 28 | 9555 | -0.5% | 57 | 9555 | -0.5% |
| 14400 | 18 | 14584 | 1.3% | 37 | 14584 | 1.3% |
| 19200 | 13 | 19793 | 3.1% | 28 | 19110 | -0.5% |
| 28800 | 9 | 27710 | -3.8% | 18 | 29169 | 1.3% |
| 57600 | 4 | 55420 | -3.8% | 9 | 55420 | -3.8% |
| 76800 | 3 | 69275 | -9.8% | 6 | 79172 | 3.1% |
| 115200 | 1 | 138551 | 20.3% | 4 | 110840 | -3.8% |
| 128000 | 1 | 138551 | 8.2% | 3 | 138551 | 8.2% |
| 230400 | 0 | 277101 | 20.3% | 1 | 277101 | 20.3% |
| 256000 | 0 | 277101 | 8.2% | 1 | 277101 | 8.2% |
| fosc = 4 608 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 959 | 300 | 0.0% | 1919 | 300 | 0.0% |
| 600 | 479 | 600 | 0.0% | 959 | 600 | 0.0% |
| 1200 | 239 | 1200 | 0.0% | 479 | 1200 | 0.0% |
| 2400 | 119 | 2400 | 0.0% | 239 | 2400 | 0.0% |
| 4800 | 59 | 4800 | 0.0% | 119 | 4800 | 0.0% |
| 9600 | 29 | 9600 | 0.0% | 59 | 9600 | 0.0% |
| 14400 | 19 | 14400 | 0.0% | 39 | 14400 | 0.0% |
| 19200 | 14 | 19200 | 0.0% | 29 | 19200 | 0.0% |
| 28800 | 9 | 28800 | 0.0% | 19 | 28800 | 0.0% |
| 57600 | 4 | 57600 | 0.0% | 9 | 57600 | 0.0% |
| 76800 | 3 | 72000 | -6.2% | 7 | 72000 | -6.2% |
| 115200 | 2 | 96000 | -16.7% | 4 | 115200 | 0.0% |
| 128000 | 1 | 144000 | 12.5% | 4 | 115200 | -10.0% |
| 230400 | 0 | 288000 | 25.0% | 2 | 192000 | -16.7% |
| 256000 | 0 | 288000 | 12.5% | 1 | 288000 | 12.5% |
| fosc = 4 915 200 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 1023 | 300 | 0.0% | 2047 | 300 | 0.0% |
| 600 | 511 | 600 | 0.0% | 1023 | 600 | 0.0% |
| 1200 | 255 | 1200 | 0.0% | 511 | 1200 | 0.0% |
| 2400 | 127 | 2400 | 0.0% | 255 | 2400 | 0.0% |
| 4800 | 63 | 4800 | 0.0% | 127 | 4800 | 0.0% |
| 9600 | 31 | 9600 | 0.0% | 63 | 9600 | 0.0% |
| 14400 | 20 | 14629 | 1.6% | 42 | 14288 | -0.8% |
| 19200 | 15 | 19200 | 0.0% | 31 | 19200 | 0.0% |
| 28800 | 10 | 27927 | -3.0% | 20 | 29257 | 1.6% |
| 57600 | 4 | 61440 | 6.7% | 10 | 55855 | -3.0% |
| 76800 | 3 | 76800 | 0.0% | 7 | 76800 | 0.0% |
| 115200 | 2 | 102400 | -11.1% | 4 | 122880 | 6.7% |
| 128000 | 1 | 153600 | 20.0% | 4 | 122880 | -4.0% |
| 230400 | 0 | 307200 | 33.3% | 2 | 204800 | -11.1% |
| 256000 | 0 | 307200 | 20.0% | 1 | 307200 | 20.0% |
| fosc = 5 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 1041 | 300 | 0.0% | 2082 | 300 | 0.0% |
| 600 | 520 | 600 | 0.0% | 1041 | 600 | 0.0% |
| 1200 | 259 | 1202 | 0.2% | 520 | 1200 | 0.0% |
| 2400 | 129 | 2404 | 0.2% | 259 | 2404 | 0.2% |
| 4800 | 64 | 4808 | 0.2% | 129 | 4808 | 0.2% |
| 9600 | 32 | 9470 | -1.4% | 64 | 9615 | 0.2% |
| 14400 | 21 | 14205 | -1.4% | 42 | 14535 | 0.9% |
| 19200 | 15 | 19531 | 1.7% | 32 | 18939 | -1.4% |
| 28800 | 10 | 28409 | -1.4% | 21 | 28409 | -1.4% |
| 57600 | 4 | 62500 | 8.5% | 10 | 56818 | -1.4% |
| 76800 | 3 | 78125 | 1.7% | 7 | 78125 | 1.7% |
| 115200 | 2 | 104167 | -9.6% | 4 | 125000 | 8.5% |
| 128000 | 1 | 156250 | 22.1% | 4 | 125000 | -2.3% |
| 230400 | 0 | 312500 | 35.6% | 2 | 208333 | -9.6% |
| 256000 | 0 | 312500 | 22.1% | 1 | 312500 | 22.1% |
| fosc = 5 068 800 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 1055 | 300 | 0.0% | 2111 | 300 | 0.0% |
| 600 | 527 | 600 | 0.0% | 1055 | 600 | 0.0% |
| 1200 | 263 | 1200 | 0.0% | 527 | 1200 | 0.0% |
| 2400 | 131 | 2400 | 0.0% | 263 | 2400 | 0.0% |
| 4800 | 65 | 4800 | 0.0% | 131 | 4800 | 0.0% |
| 9600 | 32 | 9600 | 0.0% | 65 | 9600 | 0.0% |
| 14400 | 21 | 14400 | 0.0% | 43 | 14400 | 0.0% |
| 19200 | 16 | 18635 | -2.9% | 32 | 19200 | 0.0% |
| 28800 | 10 | 28800 | 0.0% | 21 | 28800 | 0.0% |
| 57600 | 5 | 52800 | -8.3% | 10 | 57600 | 0.0% |
| 76800 | 3 | 79200 | 3.1% | 7 | 79200 | 3.1% |
| 115200 | 2 | 105600 | -8.3% | 5 | 105600 | -8.3% |
| 128000 | 1 | 158400 | 23.8% | 4 | 126720 | -1.0% |
| 230400 | 0 | 316800 | 37.5% | 2 | 211200 | -8.3% |
| 256000 | 0 | 316800 | 23.8% | 1 | 316800 | 23.8% |
| fosc = 6 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 1249 | 300 | 0.0% | 2499 | 300 | 0.0% |
| 600 | 624 | 600 | 0.0% | 1249 | 600 | 0.0% |
| 1200 | 312 | 1198 | -0.2% | 624 | 1200 | 0.0% |
| 2400 | 155 | 2404 | 0.2% | 312 | 2396 | -0.2% |
| 4800 | 77 | 4808 | 0.2% | 155 | 4808 | 0.2% |
| 9600 | 38 | 9615 | 0.2% | 77 | 9615 | 0.2% |
| 14400 | 25 | 14423 | 0.2% | 51 | 14423 | 0.2% |
| 19200 | 19 | 18750 | -2.3% | 38 | 19231 | 0.2% |
| 28800 | 12 | 28846 | 0.2% | 25 | 28846 | 0.2% |
| 57600 | 6 | 53571 | -7.0% | 12 | 57692 | 0.2% |
| 76800 | 4 | 75000 | -2.3% | 9 | 75000 | -2.3% |
| 115200 | 2 | 125000 | 8.5% | 6 | 107143 | -7.0% |
| 128000 | 2 | 125000 | -2.3% | 5 | 125000 | -2.3% |
| 230400 | 1 | 187500 | -18.6% | 2 | 250000 | 8.5% |
| 256000 | 0 | 375000 | 46.5% | 2 | 250000 | -2.3% |
| fosc = 6 144 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 1279 | 300 | 0.0% | 2559 | 300 | 0.0% |
| 600 | 639 | 600 | 0.0% | 1279 | 600 | 0.0% |
| 1200 | 319 | 1200 | 0.0% | 639 | 1200 | 0.0% |
| 2400 | 159 | 2400 | 0.0% | 319 | 2400 | 0.0% |
| 4800 | 79 | 4800 | 0.0% | 159 | 4800 | 0.0% |
| 9600 | 39 | 9600 | 0.0% | 79 | 9600 | 0.0% |
| 14400 | 26 | 14222 | -1.2% | 52 | 14491 | 0.6% |
| 19200 | 19 | 19200 | 0.0% | 39 | 19200 | 0.0% |
| 28800 | 12 | 29538 | 2.6% | 26 | 28444 | -1.2% |
| 57600 | 6 | 54857 | -4.8% | 12 | 59077 | 2.6% |
| 76800 | 4 | 76800 | 0.0% | 9 | 76800 | 0.0% |
| 115200 | 2 | 128000 | 11.1% | 6 | 109714 | -4.8% |
| 128000 | 2 | 128000 | 0.0% | 5 | 128000 | 0.0% |
| 230400 | 1 | 192000 | -16.7% | 2 | 256000 | 11.1% |
| 256000 | 1 | 192000 | -25.0% | 2 | 256000 | 0.0% |
| fosc = 6 400 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 1332 | 300 | 0.0% | 2666 | 300 | 0.0% |
| 600 | 666 | 600 | 0.0% | 1332 | 600 | 0.0% |
| 1200 | 332 | 1201 | 0.1% | 666 | 1199 | -0.1% |
| 2400 | 166 | 2395 | -0.2% | 332 | 2402 | 0.1% |
| 4800 | 82 | 4819 | 0.4% | 166 | 4790 | -0.2% |
| 9600 | 41 | 9524 | -0.8% | 82 | 9639 | 0.4% |
| 14400 | 27 | 14286 | -0.8% | 55 | 14286 | -0.8% |
| 19200 | 20 | 19048 | -0.8% | 41 | 19048 | -0.8% |
| 28800 | 13 | 28571 | -0.8% | 27 | 28571 | -0.8% |
| 57600 | 6 | 57143 | -0.8% | 13 | 57143 | -0.8% |
| 76800 | 4 | 80000 | 4.2% | 9 | 80000 | 4.2% |
| 115200 | 2 | 133333 | 15.7% | 6 | 114286 | -0.8% |
| 128000 | 2 | 133333 | 4.2% | 5 | 133333 | 4.2% |
| 230400 | 1 | 200000 | -13.2% | 2 | 266667 | 15.7% |
| 256000 | 1 | 200000 | -21.9% | 2 | 266667 | 4.2% |
| fosc = 7 372 800 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 1535 | 300 | 0.0% | 3071 | 300 | 0.0% |
| 600 | 767 | 600 | 0.0% | 1535 | 600 | 0.0% |
| 1200 | 383 | 1200 | 0.0% | 767 | 1200 | 0.0% |
| 2400 | 191 | 2400 | 0.0% | 383 | 2400 | 0.0% |
| 4800 | 95 | 4800 | 0.0% | 191 | 4800 | 0.0% |
| 9600 | 47 | 9600 | 0.0% | 95 | 9600 | 0.0% |
| 14400 | 31 | 14400 | 0.0% | 63 | 14400 | 0.0% |
| 19200 | 23 | 19200 | 0.0% | 47 | 19200 | 0.0% |
| 28800 | 15 | 28800 | 0.0% | 31 | 28800 | 0.0% |
| 57600 | 7 | 57600 | 0.0% | 15 | 57600 | 0.0% |
| 76800 | 5 | 76800 | 0.0% | 11 | 76800 | 0.0% |
| 115200 | 3 | 115200 | 0.0% | 7 | 115200 | 0.0% |
| 128000 | 3 | 115200 | -10.0% | 6 | 131657 | 2.9% |
| 230400 | 1 | 230400 | 0.0% | 3 | 230400 | 0.0% |
| 256000 | 1 | 230400 | -10.0% | 3 | 230400 | -10.0% |
| fosc = 8 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 1666 | 300 | 0.0% | 3332 | 300 | 0.0% |
| 600 | 832 | 600 | 0.0% | 1666 | 600 | 0.0% |
| 1200 | 416 | 1199 | -0.1% | 832 | 1200 | 0.0% |
| 2400 | 207 | 2404 | 0.2% | 416 | 2398 | -0.1% |
| 4800 | 103 | 4808 | 0.2% | 207 | 4808 | 0.2% |
| 9600 | 51 | 9615 | 0.2% | 103 | 9615 | 0.2% |
| 14400 | 34 | 14286 | -0.8% | 68 | 14493 | 0.6% |
| 19200 | 25 | 19231 | 0.2% | 51 | 19231 | 0.2% |
| 28800 | 16 | 29412 | 2.1% | 34 | 28571 | -0.8% |
| 57600 | 8 | 55556 | -3.5% | 16 | 58824 | 2.1% |
| 76800 | 6 | 71429 | -7.0% | 12 | 76923 | 0.2% |
| 115200 | 3 | 125000 | 8.5% | 8 | 111111 | -3.5% |
| 128000 | 3 | 125000 | -2.3% | 7 | 125000 | -2.3% |
| 230400 | 1 | 250000 | 8.5% | 3 | 250000 | 8.5% |
| 256000 | 1 | 250000 | -2.3% | 3 | 250000 | -2.3% |
| fosc = 9 216 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 1919 | 300 | 0.0% | 3839 | 300 | 0.0% |
| 600 | 959 | 600 | 0.0% | 1919 | 600 | 0.0% |
| 1200 | 479 | 1200 | 0.0% | 959 | 1200 | 0.0% |
| 2400 | 239 | 2400 | 0.0% | 479 | 2400 | 0.0% |
| 4800 | 119 | 4800 | 0.0% | 239 | 4800 | 0.0% |
| 9600 | 59 | 9600 | 0.0% | 119 | 9600 | 0.0% |
| 14400 | 39 | 14400 | 0.0% | 79 | 14400 | 0.0% |
| 19200 | 29 | 19200 | 0.0% | 59 | 19200 | 0.0% |
| 28800 | 19 | 28800 | 0.0% | 39 | 28800 | 0.0% |
| 57600 | 9 | 57600 | 0.0% | 19 | 57600 | 0.0% |
| 76800 | 7 | 72000 | -6.2% | 14 | 76800 | 0.0% |
| 115200 | 4 | 115200 | 0.0% | 9 | 115200 | 0.0% |
| 128000 | 4 | 115200 | -10.0% | 8 | 128000 | 0.0% |
| 230400 | 2 | 192000 | -16.7% | 4 | 230400 | 0.0% |
| 256000 | 1 | 288000 | 12.5% | 4 | 230400 | -10.0% |
| fosc = 10 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 2082 | 300 | 0.0% | 4166 | 300 | 0.0% |
| 600 | 1041 | 600 | 0.0% | 2082 | 600 | 0.0% |
| 1200 | 520 | 1200 | 0.0% | 1041 | 1200 | 0.0% |
| 2400 | 259 | 2404 | 0.2% | 520 | 2399 | -0.0% |
| 4800 | 129 | 4808 | 0.2% | 259 | 4808 | 0.2% |
| 9600 | 64 | 9615 | 0.2% | 129 | 9615 | 0.2% |
| 14400 | 42 | 14535 | 0.9% | 86 | 14368 | -0.2% |
| 19200 | 32 | 18939 | -1.4% | 64 | 19231 | 0.2% |
| 28800 | 21 | 28409 | -1.4% | 42 | 29070 | 0.9% |
| 57600 | 10 | 56818 | -1.4% | 21 | 56818 | -1.4% |
| 76800 | 7 | 78125 | 1.7% | 15 | 78125 | 1.7% |
| 115200 | 4 | 125000 | 8.5% | 10 | 113636 | -1.4% |
| 128000 | 4 | 125000 | -2.3% | 9 | 125000 | -2.3% |
| 230400 | 2 | 208333 | -9.6% | 4 | 250000 | 8.5% |
| 256000 | 1 | 312500 | 22.1% | 4 | 250000 | -2.3% |
| fosc = 10 240 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 2132 | 300 | 0.0% | 4266 | 300 | 0.0% |
| 600 | 1066 | 600 | 0.0% | 2132 | 600 | 0.0% |
| 1200 | 532 | 1201 | 0.1% | 1066 | 1200 | 0.0% |
| 2400 | 266 | 2397 | -0.1% | 532 | 2402 | 0.1% |
| 4800 | 132 | 4812 | 0.2% | 266 | 4794 | -0.1% |
| 9600 | 66 | 9552 | -0.5% | 132 | 9624 | 0.2% |
| 14400 | 43 | 14545 | 1.0% | 88 | 14382 | -0.1% |
| 19200 | 32 | 19394 | 1.0% | 66 | 19104 | -0.5% |
| 28800 | 21 | 29091 | 1.0% | 43 | 29091 | 1.0% |
| 57600 | 10 | 58182 | 1.0% | 21 | 58182 | 1.0% |
| 76800 | 7 | 80000 | 4.2% | 16 | 75294 | -2.0% |
| 115200 | 5 | 106667 | -7.4% | 10 | 116364 | 1.0% |
| 128000 | 4 | 128000 | 0.0% | 9 | 128000 | 0.0% |
| 230400 | 2 | 213333 | -7.4% | 5 | 213333 | -7.4% |
| 256000 | 2 | 213333 | -16.7% | 4 | 256000 | 0.0% |
| fosc = 11 059 200 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 2303 | 300 | 0.0% | 4607 | 300 | 0.0% |
| 600 | 1151 | 600 | 0.0% | 2303 | 600 | 0.0% |
| 1200 | 575 | 1200 | 0.0% | 1151 | 1200 | 0.0% |
| 2400 | 287 | 2400 | 0.0% | 575 | 2400 | 0.0% |
| 4800 | 143 | 4800 | 0.0% | 287 | 4800 | 0.0% |
| 9600 | 71 | 9600 | 0.0% | 143 | 9600 | 0.0% |
| 14400 | 47 | 14400 | 0.0% | 95 | 14400 | 0.0% |
| 19200 | 35 | 19200 | 0.0% | 71 | 19200 | 0.0% |
| 28800 | 23 | 28800 | 0.0% | 47 | 28800 | 0.0% |
| 57600 | 11 | 57600 | 0.0% | 23 | 57600 | 0.0% |
| 76800 | 8 | 76800 | 0.0% | 17 | 76800 | 0.0% |
| 115200 | 5 | 115200 | 0.0% | 11 | 115200 | 0.0% |
| 128000 | 4 | 138240 | 8.0% | 10 | 125673 | -1.8% |
| 230400 | 2 | 230400 | 0.0% | 5 | 230400 | 0.0% |
| 256000 | 2 | 230400 | -10.0% | 4 | 276480 | 8.0% |
| fosc = 12 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 2499 | 300 | 0.0% | 4999 | 300 | 0.0% |
| 600 | 1249 | 600 | 0.0% | 2499 | 600 | 0.0% |
| 1200 | 624 | 1200 | 0.0% | 1249 | 1200 | 0.0% |
| 2400 | 312 | 2396 | -0.2% | 624 | 2400 | 0.0% |
| 4800 | 155 | 4808 | 0.2% | 312 | 4792 | -0.2% |
| 9600 | 77 | 9615 | 0.2% | 155 | 9615 | 0.2% |
| 14400 | 51 | 14423 | 0.2% | 103 | 14423 | 0.2% |
| 19200 | 38 | 19231 | 0.2% | 77 | 19231 | 0.2% |
| 28800 | 25 | 28846 | 0.2% | 51 | 28846 | 0.2% |
| 57600 | 12 | 57692 | 0.2% | 25 | 57692 | 0.2% |
| 76800 | 9 | 75000 | -2.3% | 19 | 75000 | -2.3% |
| 115200 | 6 | 107143 | -7.0% | 12 | 115385 | 0.2% |
| 128000 | 5 | 125000 | -2.3% | 11 | 125000 | -2.3% |
| 230400 | 2 | 250000 | 8.5% | 6 | 214286 | -7.0% |
| 256000 | 2 | 250000 | -2.3% | 5 | 250000 | -2.3% |
| fosc = 12 288 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 2559 | 300 | 0.0% | 5119 | 300 | 0.0% |
| 600 | 1279 | 600 | 0.0% | 2559 | 600 | 0.0% |
| 1200 | 639 | 1200 | 0.0% | 1279 | 1200 | 0.0% |
| 2400 | 319 | 2400 | 0.0% | 639 | 2400 | 0.0% |
| 4800 | 159 | 4800 | 0.0% | 319 | 4800 | 0.0% |
| 9600 | 79 | 9600 | 0.0% | 159 | 9600 | 0.0% |
| 14400 | 52 | 14491 | 0.6% | 106 | 14355 | -0.3% |
| 19200 | 39 | 19200 | 0.0% | 79 | 19200 | 0.0% |
| 28800 | 26 | 28444 | -1.2% | 52 | 28981 | 0.6% |
| 57600 | 12 | 59077 | 2.6% | 26 | 56889 | -1.2% |
| 76800 | 9 | 76800 | 0.0% | 19 | 76800 | 0.0% |
| 115200 | 6 | 109714 | -4.8% | 12 | 118154 | 2.6% |
| 128000 | 5 | 128000 | 0.0% | 11 | 128000 | 0.0% |
| 230400 | 2 | 256000 | 11.1% | 6 | 219429 | -4.8% |
| 256000 | 2 | 256000 | 0.0% | 5 | 256000 | 0.0% |
| fosc = 12 800 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 2666 | 300 | 0.0% | 5332 | 300 | 0.0% |
| 600 | 1332 | 600 | 0.0% | 2666 | 600 | 0.0% |
| 1200 | 666 | 1199 | -0.1% | 1332 | 1200 | 0.0% |
| 2400 | 332 | 2402 | 0.1% | 666 | 2399 | -0.0% |
| 4800 | 166 | 4790 | -0.2% | 332 | 4805 | 0.1% |
| 9600 | 82 | 9639 | 0.4% | 166 | 9581 | -0.2% |
| 14400 | 55 | 14286 | -0.8% | 110 | 14414 | 0.1% |
| 19200 | 41 | 19048 | -0.8% | 82 | 19277 | 0.4% |
| 28800 | 27 | 28571 | -0.8% | 55 | 28571 | -0.8% |
| 57600 | 13 | 57143 | -0.8% | 27 | 57143 | -0.8% |
| 76800 | 9 | 80000 | 4.2% | 20 | 76190 | -0.8% |
| 115200 | 6 | 114286 | -0.8% | 13 | 114286 | -0.8% |
| 128000 | 5 | 133333 | 4.2% | 12 | 123077 | -3.8% |
| 230400 | 2 | 266667 | 15.7% | 6 | 228571 | -0.8% |
| 256000 | 2 | 266667 | 4.2% | 5 | 266667 | 4.2% |
| fosc = 14 318 182 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 2982 | 300 | 0.0% | 5965 | 300 | 0.0% |
| 600 | 1490 | 600 | 0.0% | 2982 | 600 | 0.0% |
| 1200 | 745 | 1200 | 0.0% | 1490 | 1200 | 0.0% |
| 2400 | 372 | 2399 | -0.0% | 745 | 2399 | -0.0% |
| 4800 | 185 | 4811 | 0.2% | 372 | 4798 | -0.0% |
| 9600 | 92 | 9622 | 0.2% | 185 | 9622 | 0.2% |
| 14400 | 61 | 14434 | 0.2% | 123 | 14434 | 0.2% |
| 19200 | 46 | 19040 | -0.8% | 92 | 19245 | 0.2% |
| 28800 | 30 | 28867 | 0.2% | 61 | 28867 | 0.2% |
| 57600 | 15 | 55930 | -2.9% | 30 | 57735 | 0.2% |
| 76800 | 11 | 74574 | -2.9% | 22 | 77816 | 1.3% |
| 115200 | 7 | 111861 | -2.9% | 15 | 111861 | -2.9% |
| 128000 | 6 | 127841 | -0.1% | 13 | 127841 | -0.1% |
| 230400 | 3 | 223722 | -2.9% | 7 | 223722 | -2.9% |
| 256000 | 2 | 298295 | 16.5% | 6 | 255682 | -0.1% |
| fosc = 14 745 600 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 3071 | 300 | 0.0% | 6143 | 300 | 0.0% |
| 600 | 1535 | 600 | 0.0% | 3071 | 600 | 0.0% |
| 1200 | 767 | 1200 | 0.0% | 1535 | 1200 | 0.0% |
| 2400 | 383 | 2400 | 0.0% | 767 | 2400 | 0.0% |
| 4800 | 191 | 4800 | 0.0% | 383 | 4800 | 0.0% |
| 9600 | 95 | 9600 | 0.0% | 191 | 9600 | 0.0% |
| 14400 | 63 | 14400 | 0.0% | 127 | 14400 | 0.0% |
| 19200 | 47 | 19200 | 0.0% | 95 | 19200 | 0.0% |
| 28800 | 31 | 28800 | 0.0% | 63 | 28800 | 0.0% |
| 57600 | 15 | 57600 | 0.0% | 31 | 57600 | 0.0% |
| 76800 | 11 | 76800 | 0.0% | 23 | 76800 | 0.0% |
| 115200 | 7 | 115200 | 0.0% | 15 | 115200 | 0.0% |
| 128000 | 6 | 131657 | 2.9% | 13 | 131657 | 2.9% |
| 230400 | 3 | 230400 | 0.0% | 7 | 230400 | 0.0% |
| 256000 | 3 | 230400 | -10.0% | 6 | 263314 | 2.9% |
| fosc = 16 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 3332 | 300 | 0.0% | 6666 | 300 | 0.0% |
| 600 | 1666 | 600 | 0.0% | 3332 | 600 | 0.0% |
| 1200 | 832 | 1200 | 0.0% | 1666 | 1200 | 0.0% |
| 2400 | 416 | 2398 | -0.1% | 832 | 2401 | 0.0% |
| 4800 | 207 | 4808 | 0.2% | 416 | 4796 | -0.1% |
| 9600 | 103 | 9615 | 0.2% | 207 | 9615 | 0.2% |
| 14400 | 68 | 14493 | 0.6% | 138 | 14388 | -0.1% |
| 19200 | 51 | 19231 | 0.2% | 103 | 19231 | 0.2% |
| 28800 | 34 | 28571 | -0.8% | 68 | 28986 | 0.6% |
| 57600 | 16 | 58824 | 2.1% | 34 | 57143 | -0.8% |
| 76800 | 12 | 76923 | 0.2% | 25 | 76923 | 0.2% |
| 115200 | 8 | 111111 | -3.5% | 16 | 117647 | 2.1% |
| 128000 | 7 | 125000 | -2.3% | 15 | 125000 | -2.3% |
| 230400 | 3 | 250000 | 8.5% | 8 | 222222 | -3.5% |
| 256000 | 3 | 250000 | -2.3% | 7 | 250000 | -2.3% |
| fosc = 16 800 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 3499 | 300 | 0.0% | 6999 | 300 | 0.0% |
| 600 | 1749 | 600 | 0.0% | 3499 | 600 | 0.0% |
| 1200 | 874 | 1200 | 0.0% | 1749 | 1200 | 0.0% |
| 2400 | 437 | 2397 | -0.1% | 874 | 2400 | 0.0% |
| 4800 | 218 | 4795 | -0.1% | 437 | 4795 | -0.1% |
| 9600 | 108 | 9633 | 0.3% | 218 | 9589 | -0.1% |
| 14400 | 72 | 14384 | -0.1% | 145 | 14384 | -0.1% |
| 19200 | 54 | 19091 | -0.6% | 108 | 19266 | 0.3% |
| 28800 | 35 | 29167 | 1.3% | 72 | 28767 | -0.1% |
| 57600 | 17 | 58333 | 1.3% | 35 | 58333 | 1.3% |
| 76800 | 13 | 75000 | -2.3% | 26 | 77778 | 1.3% |
| 115200 | 8 | 116667 | 1.3% | 17 | 116667 | 1.3% |
| 128000 | 7 | 131250 | 2.5% | 15 | 131250 | 2.5% |
| 230400 | 4 | 210000 | -8.9% | 8 | 233333 | 1.3% |
| 256000 | 3 | 262500 | 2.5% | 7 | 262500 | 2.5% |
| fosc = 18 432 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 3839 | 300 | 0.0% | 7679 | 300 | 0.0% |
| 600 | 1919 | 600 | 0.0% | 3839 | 600 | 0.0% |
| 1200 | 959 | 1200 | 0.0% | 1919 | 1200 | 0.0% |
| 2400 | 479 | 2400 | 0.0% | 959 | 2400 | 0.0% |
| 4800 | 239 | 4800 | 0.0% | 479 | 4800 | 0.0% |
| 9600 | 119 | 9600 | 0.0% | 239 | 9600 | 0.0% |
| 14400 | 79 | 14400 | 0.0% | 159 | 14400 | 0.0% |
| 19200 | 59 | 19200 | 0.0% | 119 | 19200 | 0.0% |
| 28800 | 39 | 28800 | 0.0% | 79 | 28800 | 0.0% |
| 57600 | 19 | 57600 | 0.0% | 39 | 57600 | 0.0% |
| 76800 | 14 | 76800 | 0.0% | 29 | 76800 | 0.0% |
| 115200 | 9 | 115200 | 0.0% | 19 | 115200 | 0.0% |
| 128000 | 8 | 128000 | 0.0% | 17 | 128000 | 0.0% |
| 230400 | 4 | 230400 | 0.0% | 9 | 230400 | 0.0% |
| 256000 | 4 | 230400 | -10.0% | 8 | 256000 | 0.0% |
| fosc = 20 000 000 Hz |
|---|
| nominal Bit rate | U2Xn=0 | U2Xn=1 |
|---|
| UBRR | actual Bit rate | error | UBRR | actual Bit rate | error |
|---|
| 300 | 4166 | 300 | 0.0% | 8332 | 300 | 0.0% |
| 600 | 2082 | 600 | 0.0% | 4166 | 600 | 0.0% |
| 1200 | 1041 | 1200 | 0.0% | 2082 | 1200 | 0.0% |
| 2400 | 520 | 2399 | -0.0% | 1041 | 2399 | -0.0% |
| 4800 | 259 | 4808 | 0.2% | 520 | 4798 | -0.0% |
| 9600 | 129 | 9615 | 0.2% | 259 | 9615 | 0.2% |
| 14400 | 86 | 14368 | -0.2% | 173 | 14368 | -0.2% |
| 19200 | 64 | 19231 | 0.2% | 129 | 19231 | 0.2% |
| 28800 | 42 | 29070 | 0.9% | 86 | 28736 | -0.2% |
| 57600 | 21 | 56818 | -1.4% | 42 | 58140 | 0.9% |
| 76800 | 15 | 78125 | 1.7% | 32 | 75758 | -1.4% |
| 115200 | 10 | 113636 | -1.4% | 21 | 113636 | -1.4% |
| 128000 | 9 | 125000 | -2.3% | 19 | 125000 | -2.3% |
| 230400 | 4 | 250000 | 8.5% | 10 | 227273 | -1.4% |
| 256000 | 4 | 250000 | -2.3% | 9 | 250000 | -2.3% |
Source code