Fujitsu MB90390 Series Hardware Manual page 404

CHAPTER 20 UART2, UART3
■ Suggested Division Ratios for Different Machine Speeds and Baud Rates
The following settings are suggested for different MCU clock speeds and baud rates:
Table 20.6-1 Suggested Baud Rates and Reload Values at Different Machine Speeds
Baud 8 MHz
rate
(bps) value
4M -
2M -
1M 7
500000 15
460800 -
250000 31
230400 -
153600 51
125000 63
115200 68
76800 103
57600 138
38400 207
28800 277
19200 416
10417 767
9600 832
7200 1110
4800 1666
2400 3332
1200 6666
600 13332
300 26666
Notes:
• Deviations (dev.) are given in %.
• Maximum Synchronous Baud Rate: MCU-Clock div. by 5.
376
10 MHz
dev. value dev.
- - -
- 4 0
0 9 0
0 19 0
- - -
0 39 0
- - -
-0.16 64 -0.16
0 79 0
-0.64 86 0.22
-0.16 129 -0.16
0.08 173 0.22
-0.16 259 -0.16
0.08 346 <0.01
0.08 520 0.03
<0.01 959 <0.01
0.04 1041 0.03
<0.01 1388 <0.01
0.02 2082 -0.02
<0.01 4166 <0.01
<0.01 8334 0.02
<0.01 16666 <0.01
<0.01 - -
16 MHz
value dev. value
- - 4
7 0 9
15 0 19
31 0 39
- - -
63 0 79
- - -
103 -0.16 129
127 0 159
138 0.08 173
207 -0.16 259
277 0.08 346
416 0.08 520
554 -0.01 693
832 -0.03 1041
1535 <0.01 1919
1666 0.02 2083
2221 <0.01 2777
3332 <0.01 4166
6666 <0.01 8332
13332 <0.01 16666
26666 <0.01 -
- - -
20 MHz 24 MHz
dev. value
0 5
0 11
0 23
0 47
- 51
0 95
- 103
-0.16 155
0 191
0.22 207
-0.16 311
-0.06 416
0.03 624
-0.06 832
0.03 1249
<0.01 2303
0.03 2499
<0.01 3332
<0.01 4999
<0.01 9999
<0.01 19999
- -
- -
dev.
0
0
0
0
-0.16
0
-0.16
-0.16
0
-0.16
-0.16
0.08
0
-0.03
0
<0.01
0
<0.01
0
0
0
-
-