Table 14-4 Examples of BRR Settings in Synchronous Mode
Bit
2
Rate
n
100
—
250
1
500
1
1K
0
2.5M
0
5K
0
10K
0
25K
0
50K
0
100K
—
250K
0
500K
1M
2.5M
Notes:
Blank: No setting is available.
—: A setting is available, but the bit rate is inaccurate.
B = OSC/[8 × 2
B :
Bit rate
BRR value (0 ≤ N ≤ 255)
N :
OSC :
Crystal oscillator frequency in MHz
n :
Internal clock source (0, 1, 2, or 3)
The meaning of n is given by the table below:
n
CKS1
0
0
1
0
2
1
3
1
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XTAL Frequency (MHz)
4
N
n
N
—
—
—
249
2
124
124
1
249
249
1
124
99
0
199
49
0
99
24
0
49
9
0
19
4
0
9
—
0
4
0
0
1
0
0
× (N + 1)]
2n
CKS0
Clock
0
ø
1
ø/4
0
ø/16
1
ø/64
8
10
n
N
n
—
—
—
2
249
—
2
124
—
1
249
—
1
99
1
0
199
0
0
99
0
0
39
0
0
19
0
0
9
—
0
3
0
0
1
—
0
0
—
258
16
N
n
N
—
—
—
—
3
124
—
2
249
—
2
124
124
1
199
249
1
99
124
0
199
49
0
79
24
0
39
—
0
19
4
0
7
—
0
3
—
0
1
20
n
N
—
—
—
—
—
—
—
—
1
249
1
124
0
249
0
99
0
49
0
24
0
9
0
4
—
—
0
0