
PIC18F2450/4450
DS39760A-page 158
Advance Information
2006 Microchip Technology Inc.
TABLE 15-3:
BAUD RATES FOR ASYNCHRONOUS MODES
BAUD
RATE
(K)
SYNC = 0, BRGH = 0, BRG16 = 0
FOSC = 40.000 MHz
FOSC = 20.000 MHz
FOSC = 10.000 MHz
FOSC = 8.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3
—
——
—
——
—
1.2
—
1.221
1.73
255
1.202
0.16
129
1201
-0.16
103
2.4
2.441
1.73
255
2.404
0.16
129
2.404
0.16
64
2403
-0.16
51
9.6
9.615
0.16
64
9.766
1.73
31
9.766
1.73
15
9615
-0.16
12
19.2
19.531
1.73
31
19.531
1.73
15
19.531
1.73
7
—
57.6
56.818
-1.36
10
62.500
8.51
4
52.083
-9.58
2
—
115.2
125.000
8.51
4
104.167
-9.58
2
78.125
-32.18
1
—
BAUD
RATE
(K)
SYNC = 0, BRGH = 0, BRG16 = 0
FOSC = 4.000 MHz
FOSC = 2.000 MHz
FOSC = 1.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3
0.300
0.16
207
300
-0.16
103
300
-0.16
51
1.2
1.202
0.16
51
1201
-0.16
25
1201
-0.16
12
2.4
2.404
0.16
25
2403
-0.16
12
—
9.6
8.929
-6.99
6
—
19.2
20.833
8.51
2
—
57.6
62.500
8.51
0
—
115.2
62.500
-45.75
0
—
BAUD
RATE
(K)
SYNC = 0, BRGH = 1, BRG16 = 0
FOSC = 40.000 MHz
FOSC = 20.000 MHz
FOSC = 10.000 MHz
FOSC = 8.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3
—
——
—
——
—
1.2
—
——
—
——
—
2.4
—
2.441
1.73
255
2403
-0.16
207
9.6
9.766
1.73
255
9.615
0.16
129
9.615
0.16
64
9615
-0.16
51
19.2
19.231
0.16
129
19.231
0.16
64
19.531
1.73
31
19230
-0.16
25
57.6
58.140
0.94
42
56.818
-1.36
21
56.818
-1.36
10
55555
3.55
8
115.2
113.636
-1.36
21
113.636
-1.36
10
125.000
8.51
4
—
BAUD
RATE
(K)
SYNC = 0, BRGH = 1, BRG16 = 0
FOSC = 4.000 MHz
FOSC = 2.000 MHz
FOSC = 1.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.3
—
300
-0.16
207
1.2
1.202
0.16
207
1201
-0.16
103
1201
-0.16
51
2.4
2.404
0.16
103
2403
-0.16
51
2403
-0.16
25
9.6
9.615
0.16
25
9615
-0.16
12
—
19.2
19.231
0.16
12
—
57.6
62.500
8.51
3
—
115.2
125.000
8.51
1
—