MEGA128CAN Datasheet, PDF (198/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

Table 87. Examples of UBRRn Settings for Commonly Frequencies (Continued)
Baud
Rate
(bps)
fclk_io = 12.0000 MHz
U2Xn = 0
U2Xn = 1
UBRRn Error UBRRn Error
fclk_io = 14.7456 MHz
U2Xn = 0
U2Xn = 1
UBRRn Error UBRRn Error
fclk_io = 16.0000 MHz
U2Xn = 0
U2Xn = 1
UBRRn Error UBRRn Error
2400
312 -0.2%
624
0.0%
383
0.0%
767
0.0%
416
-0.1% 832
0.0%
4800
155
0.2%
312
-0.2% 191
0.0%
383
0.0%
207
0.2%
416 -0.1%
9600
77
0.2%
155
0.2%
95
0.0%
191
0.0%
103
0.2%
207
0.2%
14.4k
51
0.2%
103
0.2%
63
0.0%
127
0.0%
68
0.6%
138 -0.1%
19.2k
38
0.2%
77
0.2%
47
0.0%
95
0.0%
51
0.2%
103
0.2%
28.8k
25
0.2%
51
0.2%
31
0.0%
63
0.0%
34
-0.8%
68
0.6%
38.4k
19
-2.5%
38
0.2%
23
0.0%
47
0.0%
25
0.2%
51
0.2%
57.6k
12
0.2%
25
0.2%
15
0.0%
31
0.0%
16
2.1%
34
-0.8%
76.8k
9
-2.7%
19
-2.5%
11
0.0%
23
0.0%
12
0.2%
25
0.2%
115.2k
6
-8.9%
12
0.2%
7
0.0%
15
0.0%
8
-3.5%
16
2.1%
230.4k
2
11.3%
6
-8.9%
3
0.0%
7
0.0%
3
8.5%
8
-3.5%
250k
2
0.0%
5
0.0%
3
-7.8%
6
5.3%
3
0.0%
7
0.0%
500k
–
–
2
0.0%
1
-7.8%
3
-7.8%
1
0.0%
3
0.0%
1M
Max. ⁽¹⁾
–
–
750 kbps
–
–
1.5 Mbps
0
-7.8%
921.6 kbps
1
-7.8%
1.8432 Mbps
0
0.0%
1 Mbps
1
0.0%
2 Mbps
1.
UBRRn = 0, Error = 0.0%
198 AT90CAN128
4250E–CAN–12/04