PIC16F870/871
TABLE 9-3:
BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 0)
FOSC = 20 MHz
FOSC = 16 MHz
FOSC = 10 MHz
BAUD
RATE
(K)
SPBRG
SPBRG
SPBRG
%
%
%
value
value
value
KBAUD ERROR
KBAUD ERROR
KBAUD ERROR
(decimal)
(decimal)
(decimal)
0.3
1.2
-
-
-
255
129
31
15
9
-
-
-
207
103
25
12
8
-
-
-
129
64
15
7
1.221
2.404
9.766
19.531
31.250
34.722
62.500
1.221
1.75
0.17
1.73
1.72
8.51
3.34
8.51
-
1.202
0.17
0.17
0.16
0.16
3.55
6.29
8.51
-
1.202
0.17
0.17
1.73
1.72
8.51
6.99
9.58
-
2.4
2.404
2.404
9.6
9.615
9.766
19.2
28.8
33.6
57.6
HIGH
19.231
27.778
35.714
62.500
0.977
19.531
31.250
31.250
52.083
0.610
4
8
6
4
4
3
2
255
0
255
0
255
0
LOW 312.500
-
250.000
-
156.250
-
FOSC = 4 MHz
FOSC = 3.6864 MHz
BAUD
RATE
(K)
SPBRG
value
SPBRG
value
%
%
ERROR
ERROR
KBAUD
(decimal) KBAUD
(decimal)
0.3
1.2
0.300
1.202
2.404
8.929
20.833
31.250
-
0
207
51
25
6
0.301
1.216
2.432
9.322
18.643
-
0.33
1.33
1.33
2.90
2.90
-
185
46
22
5
0.17
0.17
6.99
8.51
8.51
-
2.4
9.6
19.2
28.8
33.6
57.6
HIGH
LOW
2
2
1
-
-
-
-
-
62.500
0.244
62.500
8.51
-
0
55.930
0.218
55.930
2.90
-
0
255
0
255
0
-
-
-
TABLE 9-4:
BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 1)
FOSC = 20 MHz
FOSC = 16 MHz
FOSC = 10 MHz
BAUD
RATE
(K)
SPBRG
value
SPBRG
value
SPBRG
value
%
%
%
KBAUD
ERROR
KBAUD
ERROR
KBAUD
ERROR
(decimal)
(decimal)
(decimal)
0.3
1.2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2.4
-
-
-
-
-
-
2.441
9.615
19.531
28.409
32.895
56.818
2.441
625.000
1.71
0.16
1.72
1.36
2.10
1.36
-
255
64
31
21
18
10
255
0
9.6
9.615
19.231
29.070
33.784
59.524
4.883
0.16
0.16
0.94
0.55
3.34
-
129
64
42
36
20
255
0
9.615
19.231
29.412
33.333
58.824
3.906
1000.000
0.16
0.16
2.13
0.79
2.13
-
103
51
33
29
16
255
0
19.2
28.8
33.6
57.6
HIGH
LOW 1250.000
-
-
FOSC = 4 MHz
FOSC = 3.6864 MHz
BAUD
RATE
(K)
SPBRG
value
SPBRG
value
%
%
ERROR
ERROR
KBAUD
(decimal) KBAUD
(decimal)
0.3
1.2
-
-
-
207
103
25
12
8
-
-
-
185
92
22
11
7
1.202
0.17
0.17
0.16
0.16
3.55
6.29
8.51
-
1.203
0.25
0.25
1.32
2.90
2.90
4.88
2.90
-
2.4
2.404
2.406
9.6
9.615
9.727
19.2
28.8
33.6
57.6
HIGH
LOW
19.231
27.798
35.714
62.500
0.977
18.643
27.965
31.960
55.930
0.874
6
6
3
3
255
0
255
0
250.000
-
273.722
-
DS30569A-page 66
Preliminary
1999 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
