ATmega8(L)
Table 62. Examples of UBRR Settings for Commonly Used Oscillator Frequencies (Continued)
fosc = 8.0000MHz fosc = 11.0592MHz
U2X = 0 U2X = 1 U2X = 0 U2X = 1
UBRR UBRR UBRR UBRR
fosc = 14.7456MHz
Baud
Rate
(bps)
U2X = 0
U2X = 1
UBRR
Error
0.2%
0.2%
0.2%
-0.8ꢀ
0.2%
2.1ꢀ
0.2%
-3.5ꢀ
-7.0ꢀ
8.5ꢀ
8.5ꢀ
0.0%
0.0%
–
Error
-0.1%
0.2%
0.2%
0.6ꢀ
0.2%
-0.8ꢀ
0.2%
2.1ꢀ
0.2%
-3.5ꢀ
8.5ꢀ
0.0%
0.0%
0.0%
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
-7.8ꢀ
–
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
-7.8ꢀ
-7.8ꢀ
–
UBRR
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
-7.8ꢀ
-7.8ꢀ
-7.8ꢀ
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
5.3ꢀ
-7.8ꢀ
-7.8ꢀ
2400
4800
9600
14.4k
19.2k
28.8k
38.4k
57.6k
76.8k
115.2k
230.4k
250k
207
416
207
103
68
51
34
25
16
12
8
287
575
287
143
95
71
47
35
23
17
11
5
383
767
383
191
127
95
63
47
31
23
15
7
103
143
191
51
71
95
34
47
63
25
35
47
16
23
31
12
17
23
8
11
15
6
8
11
3
5
7
1
3
2
3
1
3
2
5
3
6
0.5M
0
–
1
–
2
1
3
1M
0
–
–
–
0
1
Max (1)
0.5Mbps
1Mbps
691.2kbps
1.3824Mbps
921.6kbps
1.8432Mbps
1.
UBRR = 0, Error = 0.0ꢀ
155
2486AA–AVR–02/2013
ATMEL [ ATMEL ]
