Table 84. Examples of UBRRn Settings for Commonly Used Oscillator Frequencies (Continued)
fosc = 16.0000 MHz fosc = 18.4320 MHz fosc = 20.0000 MHz
U2Xn = 0 U2Xn = 1 U2Xn = 0 U2Xn = 1 U2Xn = 0 U2Xn = 1
Baud
Rate
(bps)
Error
-0.1ꢀ
0.2ꢀ
0.2ꢀ
0.6ꢀ
0.2ꢀ
-0.8ꢀ
0.2ꢀ
2.1ꢀ
0.2ꢀ
-3.5ꢀ
8.5ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
Error
0.0ꢀ
-0.1ꢀ
0.2ꢀ
-0.1ꢀ
0.2ꢀ
0.6ꢀ
0.2ꢀ
-0.8ꢀ
0.2ꢀ
2.1ꢀ
-3.5ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
Error
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
-7.8ꢀ
–
Error
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
0.0ꢀ
2.4ꢀ
-7.8ꢀ
–
Error
0.0ꢀ
0.2ꢀ
0.2ꢀ
-0.2ꢀ
0.2ꢀ
0.9ꢀ
-1.4ꢀ
-1.4ꢀ
1.7ꢀ
-1.4ꢀ
8.5ꢀ
0.0ꢀ
–
Error
0.0ꢀ
0.0ꢀ
0.2ꢀ
-0.2ꢀ
0.2ꢀ
-0.2ꢀ
0.2ꢀ
0.9ꢀ
-1.4ꢀ
-1.4ꢀ
-1.4ꢀ
0.0ꢀ
0.0ꢀ
–
UBRRn
416
207
103
68
51
34
25
16
12
8
UBRRn
832
416
207
138
103
68
UBRRn
479
239
119
79
59
39
29
19
14
9
UBRRn
959
479
239
159
119
79
UBRRn
520
259
129
86
64
42
32
21
15
10
4
UBRRn
1041
520
259
173
129
86
2400
4800
9600
14.4k
19.2k
28.8k
38.4k
57.6k
76.8k
115.2k
230.4k
250k
51
59
64
34
39
42
25
29
32
16
19
21
3
8
4
9
10
3
7
4
8
4
9
0.5M
1M
1
3
–
4
–
4
0
1
–
–
–
–
–
–
Max. (1)
1 Mbps
UBRRn = 0, Error = 0.0ꢀ
2 Mbps
1.152 Mbps
2.304 Mbps
1.25 Mbps
2.5 Mbps
1.
188
ATmega48/88/168
2545D–AVR–07/04
ATMEL [ ATMEL ]
