
PIC16F87X
DS30292C-page 98
2001 Microchip Technology Inc.
TABLE 10-3:
BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 0)
BAUD
RATE
(K)
FOSC = 20 MHz
FOSC = 16 MHz
FOSC = 10 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
KBAUD
%
ERROR
SPBRG
value
(decimal)
KBAUD
%
ERROR
SPBRG
value
(decimal)
0.3
-
--
-
--
1.2
1.221
1.75
255
1.202
0.17
207
1.202
0.17
129
2.4
2.404
0.17
129
2.404
0.17
103
2.404
0.17
64
9.6
9.766
1.73
31
9.615
0.16
25
9.766
1.73
15
19.2
19.531
1.72
15
19.231
0.16
12
19.531
1.72
7
28.8
31.250
8.51
9
27.778
3.55
8
31.250
8.51
4
33.6
34.722
3.34
8
35.714
6.29
6
31.250
6.99
4
57.6
62.500
8.51
4
62.500
8.51
3
52.083
9.58
2
HIGH
1.221
-
255
0.977
-
255
0.610
-
255
LOW
312.500
-
0
250.000
-
0
156.250
-
0
BAUD
RATE
(K)
FOSC = 4 MHz
FOSC = 3.6864 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
KBAUD
%
ERROR
SPBRG
value
(decimal)
0.3
0.300
0
207
0.3
0
191
1.2
1.202
0.17
51
1.2
0
47
2.4
2.404
0.17
25
2.4
0
23
9.6
8.929
6.99
6
9.6
0
5
19.2
20.833
8.51
2
19.2
0
2
28.8
31.250
8.51
1
28.8
0
1
33.6
-
57.6
62.500
8.51
0
57.6
0
HIGH
0.244
-
255
0.225
-
255
LOW
62.500
-
0
57.6
-
0
TABLE 10-4:
BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 1)
BAUD
RATE
(K)
FOSC = 20 MHz
FOSC = 16 MHz
FOSC = 10 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
KBAUD
%
ERROR
SPBRG
value
(decimal)
KBAUD
%
ERROR
SPBRG
value
(decimal)
0.3
-
--
-
--
-
1.2
-
--
-
--
-
2.4
-
2.441
1.71
255
9.6
9.615
0.16
129
9.615
0.16
103
9.615
0.16
64
19.2
19.231
0.16
64
19.231
0.16
51
19.531
1.72
31
28.8
29.070
0.94
42
29.412
2.13
33
28.409
1.36
21
33.6
33.784
0.55
36
33.333
0.79
29
32.895
2.10
18
57.6
59.524
3.34
20
58.824
2.13
16
56.818
1.36
10
HIGH
4.883
-
255
3.906
-
255
2.441
-
255
LOW
1250.000
-
0
1000.000
0
625.000
-
0
BAUD
RATE
(K)
FOSC = 4 MHz
FOSC = 3.6864 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
KBAUD
%
ERROR
SPBRG
value
(decimal)
0.3
-
---
-
1.2
1.202
0.17
207
1.2
0
191
2.4
2.404
0.17
103
2.4
0
95
9.6
9.615
0.16
25
9.6
0
23
19.2
19.231
0.16
12
19.2
0
11
28.8
27.798
3.55
8
28.8
0
7
33.6
35.714
6.29
6
32.9
2.04
6
57.6
62.500
8.51
3
57.6
0
3
HIGH
0.977
-
255
0.9
-
255
LOW
250.000
-
0
230.4
-
0