PIC18F2220/2320/4220/4320
TABLE 18-3: BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 0, LOW SPEED)
FOSC = 40.000 MHz
FOSC = 20.000 MHz
FOSC = 16.000 MHz
FOSC = 10.000 MHz
BAUD
RATE Actual
Actual
Rate
(K)
Actual
Rate
(K)
Actual
Rate
(K)
SPBRG
value
(decimal)
SPBRG
value
(decimal)
SPBRG
value
(decimal)
SPBRG
value
(decimal)
%
Error
%
Error
%
Error
%
Error
(K)
Rate
(K)
0.3
1.2
—
—
—
—
—
—
255
64
32
15
10
7
—
1.22
2.40
9.47
19.53
39.06
62.50
78.13
104.17
—
—
1.73
0.16
-1.36
1.73
1.73
8.51
1.73
8.51
—
—
255
129
32
15
7
0.98
1.20
2.40
9.62
19.23
35.71
62.50
83.33
—
225.52
0.16
0.16
0.16
0.16
-6.99
8.51
8.51
—
255
207
103
25
12
6
0.61
1.20
2.40
9.77
19.53
39.06
52.08
78.13
—
103.45
0.16
0.16
1.73
1.73
1.73
-9.58
1.73
—
255
129
64
15
7
2.4
2.44
1.73
0.16
-1.36
1.73
-1.36
1.73
-6.99
8.51
-16.67
4.17
0.00
9.6
9.62
19.2
38.4
57.6
76.8
96.0
115.2
18.94
39.06
56.82
78.13
89.29
125.00
3
4
3
2
3
2
1
6
2
—
1
—
1
4
—
125.00
250.00
—
8.51
0.00
—
78.13
—
-32.18
—
250.0 208.33
300.0 312.50
625.0 625.00
2
—
—
0
—
—
—
1
312.50
—
4.17
—
0
—
—
—
—
0
—
—
—
—
—
FOSC = 8.000000 MHz
FOSC = 7.159090 MHz
FOSC = 5.068800 MHz
FOSC = 4.000000 MHz
BAUD
RATE Actual
Actual
Rate
(K)
Actual
Rate
(K)
Actual
Rate
(K)
SPBRG
value
(decimal)
SPBRG
value
(decimal)
SPBRG
value
(decimal)
SPBRG
value
(decimal)
%
Error
%
Error
%
Error
%
Error
(K)
Rate
(K)
0.3
1.2
0.49
1.20
62.76
0.16
0.16
0.16
-6.99
8.51
8.51
—
255
103
51
12
6
0.44
1.20
45.65
0.23
-0.83
-2.90
-2.90
-2.90
-2.90
—
255
92
46
11
5
0.31
1.20
2.40
9.90
19.80
39.60
—
3.13
0.00
0.00
3.13
3.13
3.13
—
255
65
32
7
0.30
1.20
2.40
8.93
20.83
31.25
62.50
—
0.16
0.16
0.16
-6.99
8.51
-18.62
8.51
—
207
51
25
6
2.4
2.40
2.38
9.6
9.62
9.32
19.2
38.4
57.6
—
17.86
41.67
62.50
—
18.64
37.29
55.93
—
3
2
2
2
1
1
1
1
—
0
0
—
0
—
0
79.20
—
3.13
—
—
—
115.2
125.00
8.51
111.86
-2.90
—
—
—
FOSC = 3.579545 MHz
FOSC = 2.000000 MHz
FOSC = 1.000000 MHz
FOSC = 0.032768 MHz
BAUD
RATE
(K)
Actual
Rate
(K)
Actual
Rate
(K)
Actual
Rate
(K)
Actual
Rate
(K)
SPBRG
value
SPBRG
value
SPBRG
value
SPBRG
value
%
%
%
%
Error
Error
Error
Error
(decimal)
(decimal)
(decimal)
(decimal)
0.3
1.2
0.30
1.19
2.43
9.32
18.64
—
0.23
-0.83
1.32
-2.90
-2.90
—
185
46
22
5
0.30
1.20
2.40
10.42
15.63
31.25
—
0.16
0.16
0.16
8.51
-18.62
-18.62
—
103
25
12
2
0.30
1.20
2.23
7.81
15.63
—
0.16
0.16
-6.99
-18.62
-18.62
—
51
12
6
0.26
—
-14.67
—
1
—
—
—
—
—
—
2.4
—
—
9.6
1
—
—
19.2
38.4
57.6
2
1
0
—
—
—
0
0
—
—
—
—
55.93
-2.90
—
—
—
—
—
2003 Microchip Technology Inc.
DS39599C-page 199
MICROCHIP [ MICROCHIP ]
