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Chapter 9 Asynchronous Serial Interface
9
Table 9-4 Example of Setting the Baud Rate When 8-Bit Timer/Counter 3 Is Used (Asynchronous Serial Interface)
fCLK/16
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
0.16
0.03
0.16
0.16
0.16
2.34
2.34
2.34
Oscillation frequency
fosc (MHz) 12 MHz
Internal system clock
(fCLK) MHz
Baud rate [bps] Baud rate
error (%)
Count
clock
6 MHz
75
110
150
300
600
1200
2400
4800
9600
19200
m
155
212
155
77
38
19
9
4
fCLK/16
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
0.00
0.00
0.00
0.00
0.00
0.00
0.00
11.0592 MHz
Baud rate
error (%)
Count
clock
5.5296 MHz
m
143
195
143
71
35
17
8
fCLK/16
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
0.16
0.25
0.16
0.16
1.36
1.73
1.73
1.73
1.73
1.73
10.0 MHz
Baud rate
error (%)
Count
clock
5.0 MHz
m
129
177
129
64
32
15
7
3
1
0
fCLK/16
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
0.00
0.26
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
9.8304 MHz
Baud rate
error (%)
Count
clock
4.9152 MHz
m
127
174
127
63
31
15
7
3
1
0
fCLK/16
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
fCLK/8
0.00
0.07
0.00
0.00
0.00
0.00
0.00
0.00
7.3728 MHz
Baud rate
error (%)
Count
clock
3.6864 MHz
m
191
130
95
47
23
11
5
2