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10. Serial Communication Interface
Table 10.9 shows typical BRR settings in synchronous mode. Values in table 10.9 are for active
(high-speed) mode.
Table 10.9 Typical BRR Settings and Bit Rates (Synchronous Mode)
Bit Rate
(bits/s)
n
⎯
110
250
1
500
1
1 K
0
2.5 K
0
5 K
0
10 K
0
25 K
0
50 K
0
⎯
100 K
250 K
0
500 K
1 M
2.5 M
Legend:
Blank: Cannot be set
⎯:
Can be set, but error will result
Continuous transfer not possible at this setting
*:
BRR setting values are derived by the following equation.
OSC
N =
8 × 2
2n
Legend:
B:
Bit rate (bits/s)
BRR baud rate generator setting (0 ≤ N ≤ 255)
N:
OSC: Value of φOSC (MHz)
n:
Baud rate generator input clock number (n = 0, 1, 2, 3)
Rev.3.00 Jul. 19, 2007 page 278 of 532
REJ09B0397-0300
2
N
n
⎯
⎯
249
2
124
1
249
1
99
0
49
0
24
0
9
0
4
0
⎯
0
0*
0
0
× 10
6
– 1
× B
OSC (MHz)
4
N
n
⎯
⎯
124
2
249
2
124
1
199
1
99
0
49
0
19
0
9
0
4
0
1
0
0*
0
0
8
10
N
n
⎯
⎯
⎯
249
⎯
124
⎯
249
99
1
199
0
99
0
39
0
19
0
⎯
9
3
0
⎯
1
⎯
0*
N
⎯
⎯
⎯
⎯
124
249
124
49
24
⎯
4
⎯
⎯
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