ATMEGA128L-8MC View Datasheet(PDF) - Atmel Corporation
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Description
MFG CO.
'ATMEGA128L-8MC' PDF : 395 Pages View PDF
Table 85. Examples of UBRR Settings for Commonly Used Oscillator Frequencies
Baud
Rate
(bps)
fosc = 16.0000 MHz
U2X = 0
U2X = 1
UBRR Error UBRR Error
fosc = 18.4320 MHz
U2X = 0
U2X = 1
UBRR Error UBRR Error
2400
416 -0.1%
832
0.0%
479
0.0%
959
0.0%
4800
207
0.2%
416
-0.1%
239
0.0%
479
0.0%
9600
103
0.2%
207
0.2%
119
0.0%
239
0.0%
14.4k
68
0.6%
138 -0.1%
79
0.0%
159
0.0%
19.2k
51
0.2%
103
0.2%
59
0.0%
119
0.0%
28.8k
34
-0.8%
68
0.6%
39
0.0%
79
0.0%
38.4k
25
0.2%
51
0.2%
29
0.0%
59
0.0%
57.6k
16
2.1%
34
-0.8%
19
0.0%
39
0.0%
76.8k
12
0.2%
25
0.2%
14
0.0%
29
0.0%
115.2k
8
-3.5%
16
2.1%
9
0.0%
19
0.0%
230.4k
3
8.5%
8
-3.5%
4
0.0%
9
0.0%
250k
3
0.0%
7
0.0%
4
-7.8%
8
2.4%
0.5M
1
0.0%
3
0.0%
–
–
4
-7.8%
1M
Max (1)
0
0.0%
1 Mbps
1
0.0%
2 Mbps
–
–
1.152 Mbps
–
–
2.304 Mbps
1.
UBRR = 0, Error = 0.0%
fosc = 20.0000 MHz
U2X = 0
U2X = 1
UBRR Error UBRR Error
520
0.0% 1041 0.0%
259
0.2%
520
0.0%
129
0.2%
259
0.2%
86
-0.2% 173 -0.2%
64
0.2%
129
0.2%
42
0.9%
86
-0.2%
32
-1.4%
64
0.2%
21
-1.4%
42
0.9%
15
1.7%
32
-1.4%
10
-1.4%
21
-1.4%
4
8.5%
10
-1.4%
4
0.0%
9
0.0%
–
–
4
0.0%
–
–
–
–
1.25 Mbps
2.5 Mbps
198 ATmega128
2467O–AVR–10/06
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