PIC18F2220/2320/4220/4320
TABLE 18-4: BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 1, HIGH SPEED)
FOSC = 40.000 MHz
SPBRG
FOSC = 20.000 MHz
SPBRG
FOSC = 16.000 MHz
SPBRG
FOSC = 10.000 MHz
BAUD
RATE
(K)
Actual
Rate
(K)
SPBRG
value
Actual
%
Actual
%
Actual
%
%
value
value
value
Rate (K) Error
Rate (K) Error
Rate (K) Error
Error
(decimal)
(decimal)
(decimal)
(decimal)
2.4
9.6
—
—
1.73
0.16
0.16
0.94
-1.36
0.16
-1.36
0.00
4.17
0.00
0.00
-16.67
0.00
—
255
129
64
42
32
25
21
9
4.88
9.62
103.45
0.16
0.16
-1.36
-1.36
1.73
0.16
-1.36
0.00
4.17
-16.67
0.00
—
255
129
64
32
21
15
12
10
4
3.91
9.62
62.76
0.16
0.16
0.16
2.12
0.16
4.17
-3.55
0.00
11.11
0.00
—
255
103
51
25
16
12
9
2.44
9.63
1.73
0.16
-1.36
1.73
-1.36
1.73
-6.99
8.51
255
64
32
15
10
7
9.77
19.2
19.23
38.46
58.14
75.76
96.15
113.64
250.00
312.50
500.00
625.00
833.33
19.23
37.88
56.82
78.13
96.15
113.64
250.00
312.50
416.67
625.00
—
19.23
38.46
58.82
76.92
100.00
111.11
250.00
333.33
500.00
—
18.94
39.06
56.82
78.13
89.29
125.00
38.4
57.6
76.8
96.0
6
115.2
250.0
300.0
500.0
625.0
1000.0
8
4
3
208.33 -16.67
2
7
3
2
312.50
—
4.17
—
1
4
2
1
—
0
3
1
—
0
625.00
—
0.00
—
2
—
0
1000.00
—
0.00
—
—
—
1250.0 1250.00
1
1250.00
0.00
—
—
—
FOSC = 8.000000 MHz
SPBRG
FOSC = 7.159090 MHz
SPBRG
FOSC = 5.068800 MHz
SPBRG
FOSC = 4.000 MHz
SPBRG
BAUD
RATE
(K)
Actual
%
Actual
%
Actual
%
Actual
%
value
value
value
value
Rate (K) Error
Rate (K) Error
Rate (K) Error
Rate (K) Error
(decimal)
(decimal)
(decimal)
(decimal)
0.3
1.2
—
—
—
255
207
51
25
12
8
—
—
—
255
185
46
22
11
7
—
1.24
2.40
9.60
18.64
39.60
52.80
79.20
—
—
3.13
0.00
0.00
-2.94
3.13
-8.33
3.13
—
—
255
131
32
16
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
1.95
62.76
0.16
0.16
0.16
0.16
-3.55
-6.99
4.17
8.51
0.00
—
1.75
45.65
0.23
2.4
2.40
2.41
9.6
9.62
9.52
-0.83
1.32
19.2
38.4
57.6
76.8
96.0
115.2
250.0
300.0
500.0
19.23
38.46
55.56
71.43
100.00
125.00
250.00
—
19.45
37.29
55.93
74.57
89.49
111.86
223.72
—
-2.90
-2.90
-2.90
-6.78
-2.90
-10.51
—
5
3
6
5
3
2
4
4
—
2
—
1
3
3
105.60
—
-8.33
—
125.00
250.00
—
8.51
0.00
—
1
1
—
0
0
—
0
—
0
316.80
—
5.60
—
—
—
500.00
0.00
447.44
-10.51
—
—
—
FOSC = 3.579545 MHz
SPBRG
FOSC = 2.000000 MHz
SPBRG
FOSC = 1.000000 MHz
SPBRG
FOSC = 0.032768 MHz
SPBRG
BAUD
RATE
(K)
Actual
%
Actual
%
Actual
%
Actual
%
value
value
value
value
Rate (K) Error
Rate (K) Error
Rate (K) Error
Rate (K) Error
(decimal)
(decimal)
(decimal)
(decimal)
0.3
1.2
0.87
1.20
191.30
0.23
255
185
92
22
11
5
0.49
1.20
2.40
9.62
17.86
41.67
62.50
—
62.76
0.16
0.16
0.16
-6.99
8.51
8.51
—
255
103
51
12
6
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
0.29
1.02
2.05
—
-2.48
-14.67
-14.67
—
6
1
2.4
2.41
0.23
0
9.6
9.73
1.32
—
—
—
—
—
—
—
19.2
38.4
57.6
76.8
115.2
250.0
18.64
37.29
55.93
74.57
111.86
223.72
-2.90
-2.90
-2.90
-2.90
-2.90
-10.51
2
—
—
2
1
—
—
3
1
0
—
—
2
—
0
—
—
—
—
—
1
125.00
—
8.51
—
—
—
—
—
0
—
—
—
—
—
DS39599C-page 200
2003 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
