PIC18F87J90 Datasheet, PDF (279/450 Pages) Microchip Technology – 64/80-Pin, High-Performance Microcontrollers with LCD Driver and nanoWatt Technology

PIC18F87J90 FAMILY
TABLE 20-3: BAUD RATES FOR ASYNCHRONOUS MODES
BRGH = 0
FOSC = 40.000 MHz
FOSC = 20.000 MHz
FOSC = 10.000 MHz
BAUD
RATE
(K)
Actual
Rate
(K)
%
Error
SPBRG Actual
value Rate
(decimal) (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
2.4
2.441 1.73
255 2.404 0.16
129
2.404 0.16
64
9.6
9.615 0.16
64
9.766 1.73
31
9.766 1.73
15
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
FOSC = 8.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
—
—
—
1.201 -0.16
103
2.403 -0.16
51
9.615 -0.16
12
—
—
—
—
—
—
—
—
—
BAUD
RATE
(K)
0.3
1.2
2.4
9.6
19.2
57.6
115.2
FOSC = 4.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.300 0.16
207
1.202 0.16
51
2.404 0.16
25
8.929 -6.99
6
20.833 8.51
2
62.500 8.51
0
62.500 -45.75
0
BRGH = 0
FOSC = 2.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.300 -0.16
103
1.201 -0.16
25
2.403 -0.16
12
—
—
—
—
—
—
—
—
—
—
—
—
FOSC = 1.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.300 -0.16
51
1.201 -0.16
12
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
BAUD
RATE
(K)
0.3
1.2
2.4
9.6
19.2
57.6
115.2
BRGH = 1
FOSC = 40.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
FOSC = 20.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
FOSC = 10.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2.441 1.73
255
9.766 1.73
255 9.615 0.16
129
9.615 0.16
64
19.231 0.16
129 19.231 0.16
64
19.531 1.73
31
58.140 0.94
42
56.818 -1.36
21
56.818 -1.36
10
113.636 -1.36
21 113.636 -1.36
10 125.000 8.51
4
FOSC = 8.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
—
—
—
—
—
—
2.403 -0.16
207
9.615 -0.16
51
19.230 -0.16
25
55.555 3.55
8
—
—
—
BAUD
RATE
(K)
0.3
1.2
2.4
9.6
19.2
57.6
115.2
FOSC = 4.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
—
—
—
1.202 0.16
207
2.404 0.16
103
9.615 0.16
25
19.231 0.16
12
62.500 8.51
3
125.000 8.51
1
BRGH = 1
FOSC = 2.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
—
—
—
1.201 -0.16
103
2.403 -0.16
51
9.615 -0.16
12
—
—
—
—
—
—
—
—
—
FOSC = 1.000 MHz
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
0.300 -0.16
207
1.201 -0.16
51
2.403 -0.16
25
—
—
—
—
—
—
—
—
—
—
—
—
 2010 Microchip Technology Inc.
DS39933D-page 279