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M16C/5L Group, M16C/56 Group
23.3.3
Bit rate
The bit rate depends on the CAN clock (fCAN), the division value of the baud rate prescaler, and the
number of Tq of 1-bit time.
[
]
Bit rate bps
=
Note:
1. Division value of the baud rate prescaler = P + 1 (P = 0 to 1023)
P: Setting value of the BRP bit in the C0BCR register
Table 23.10 lists bit rate examples.
Table 23.10
Bit Rate Examples
fCAN
32 MHz
Bit Rate
No. of Tq
8 Tq
1 Mbps
16 Tq
8 Tq
500 kbps
16 Tq
8 Tq
250 kbps
16 Tq
8 Tq
16 Tq
83.3 kbps
8 Tq
10 Tq
33.3 kbps
16 Tq
20 Tq
R01UH0127EJ0110 Rev.1.10
Sep 01, 2011
------------------------------------------------------------------------------------------------------------------------------------------------------------------ -
Baud rate prescaler division value 1 ( ) number of Tq of 1 bit time
24 MHz
P+1
No. of Tq
P+1
4
8 Tq
2
8
8 Tq
4
16 Tq
16
8 Tq
8
16 Tq
48
8 Tq
24
16 Tq
120
8 Tq
96
10 Tq
60
16 Tq
48
20 Tq
fCAN
×
20 MHz
No. of Tq
P+1
3
10 Tq
2
20 Tq
1
6
10 Tq
4
3
20 Tq
2
12
10 Tq
8
6
20 Tq
4
36
8 Tq
30
18
10 Tq
24
16 Tq
15
20 Tq
12
90
8 Tq
75
72
10 Tq
60
45
20 Tq
30
36
23. CAN Module
fCANCLK
=
------------------------------------------------------------------ -
Number of Tq of 1-bit time
16 MHz
No. of Tq
P+1
No. of Tq
8 Tq
2
8 Tq
16 Tq
1
8 Tq
4
8 Tq
16 Tq
2
16 Tq
8 Tq
8
8 Tq
16 Tq
4
16 Tq
8 Tq
24
8 Tq
16 Tq
12
16 Tq
8 Tq
60
8 Tq
10 Tq
48
10 Tq
16 Tq
30
16 Tq
20 Tq
24
20 Tq
Page 605 of 803
8 MHz
P+1
1
2
1
4
2
12
6
30
24
15
12
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