FUJITSU MB91460 SERIES FR60 User Manual
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Chapter 32 USART (LIN / FIFO)
6.USART Baud Rates
■
Suggested Division Ratios for different machine speeds and baud rates
The following settings are suggested for different MCU clock speeds and baud rates:
■
Counting Example
Assume the reload value is 832. The figure
demonstrates the behavior of the both Reload Counters:
Table 6-1 Suggested Baud Rates and reload values at different machine speeds.
Baud
rate
8 MHz
10 MHz
16 MHz
20 MHz
24 MHz
32 MHz
value
%
dev.
value
%
dev.
value
%
dev.
value
%
dev.
value
%
dev.
value
%
dev.
2M
3
0
4
0
7
0
9
0
11
0
15
0
1M
7
0
9
0
15
0
19
0
23
0
31
0
500000
15
0
19
0
31
0
39
0
47
0
63
0
460800
-
-
-
-
-
-
-
-
51
-0.16
-
-
250000
31
0
39
0
63
0
79
0
95
0
127
0
230400
-
-
-
-
-
-
86
0.22
103
-0.16
138
-0.08
153600
51
-0.16
64
-0.16
103
-0.16
129
-0.16
155
-0.16
207
0.16
125000
63
0
79
0
127
0
159
0
191
0
255
0
115200
-
-
86
0.22
138
0.08
173
0.22
207
-0.16
278
-0.08
76800
103
-0.16
129
-0.16
207
-0.16
259
-0.16
311
-0.16
416
0.08
57600
138
0.08
173
0.22
277
0.08
346
-0.06
416
0.08
555
0.08
38400
207
-0.16
259
-0.16
416
0.08
520
0.03
624
0
832
-0.04
28800
277
0.08
346
<0.01
554
-0.01
693
-0.06
832
-0.03
1110
-0.01
19200
416
0.08
520
0.03
832
-0.03
1041
0.03
1249
0
1666
0.02
10417
767
<0.01
959
<0.01
1535
<0.01
1919
<0.01
2303
<0.01
3071
<0.01
9600
832
0.04
1041
0.03
1666
0.02
2083
0.03
2499
0
3332
0.01
7200
1110
<0.01
1388
<0.01
2221
<0.01
2777
<0.01
3332
<0.01
4443
-0.01
4800
1666
0.02
2082
-0.02
3332
<0.01
4166
<0.01
4999
0
6666
<0.01
2400
3332
<0.01
4166
<0.01
6666
<0.01
8332
<0.01
9999
0
13332
<0.01
1200
6666
<0.01
8334
0.02
13332
<0.01
16666
<0.01
19999
0
26666
<0.01
600
13332
<0.01
16666
<0.01
26666
<0.01
-
-
-
-
300
26666
<0.01
-
-
-
-
-
-
-
-