238
Table 10.9
Typical BRR Settings and Bit Rates (Synchronous Mode)
OSC (MHz)
Bit Rate
2
4
8
10
(bits/s)
n
N
n
N
n
N
n
N
110
—
—
—
—
—
—
—
—
250
1
249
2
124
2
249
—
—
500
1
124
1
249
2
124
—
—
1K
0
249
1
124
1
249
—
—
2.5K
0
99
0
199
1
99
1
124
5K
0
49
0
99
0
199
0
249
10K
0
24
0
49
0
99
0
124
25K
0
9
0
19
0
39
0
49
50K
0
4
0
9
0
19
0
24
100K
—
—
0
4
0
9
—
—
250K
0
0
*
0
1
0
3
0
4
500K
0
0
*
0
1
—
—
1M
0
0
*
—
—
2.5M
Blank: Cannot be set
—:
Can be set, but error will result
*
:
Continuous transmit/receive operation is not possible at this setting
Note:
BRR setting values are derived by the following equation.
N =
×
10
6
– 1
OSC
8
×
2
2n
×
B
B:
Bit rate (bits/s)
N:
BRR baud rate generator setting (0
≤
N
≤
255)
OSC: Value of ø
OSC
(MHz)
n:
Baud rate generator input clock number (n = 0, 1, 2, 3)
The meaning of n is shown in table 10.10.