PIC16F946 Datasheet, PDF (138/274 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

PIC16F946
TABLE 11-3: BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 0)
BAUD
RATE
(K)
FOSC = 20 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
FOSC = 16 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
FOSC = 10 MHz
%
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)
0.3
1.2
2.4
9.6
19.2
28.8
33.6
57.6
HIGH
LOW
FOSC = 4 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
0.300
0
207
1.202
0.17
51
2.404
0.17
25
8.929
6.99
6
20.833
8.51
2
31.250
8.51
1
—
—
—
62.500
8.51
0
0.244
—
255
62.500
—
0
FOSC = 3.6864 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
0.3
0
191
1.2
0
47
2.4
0
23
9.6
0
5
19.2
0
2
28.8
0
1
—
—
—
57.6
0
0
0.225
—
255
57.6
—
0
TABLE 11-4: BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 1)
BAUD
RATE
(K)
FOSC = 20 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
FOSC = 16 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
FOSC = 10 MHz
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)
0.3
1.2
2.4
9.6
19.2
28.8
33.6
57.6
HIGH
LOW
FOSC = 4 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
—
—
—
1.202
0.17
207
2.404
0.17
103
9.615
0.16
25
19.231
0.16
12
27.798
3.55
8
35.714
6.29
6
62.500
8.51
3
0.977
—
255
250.000
—
0
FOSC = 3.6864 MHz
KBAUD
%
ERROR
SPBRG
value
(decimal)
—
—
—
1.2
0
191
2.4
0
95
9.6
0
23
19.2
0
11
28.8
0
7
32.9
2.04
6
57.6
0
3
0.9
—
255
230.4
—
0
DS41265A-page 136
Preliminary
© 2005 Microchip Technology Inc.