Datasheet

PIC18FXX2
DS39564C-page 170 © 2006 Microchip Technology Inc.
TABLE 16-4: BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 0)
BAUD
RATE
(Kbps)
F
OSC = 40 MHz
SPBRG
value
(decimal)
33 MHz
SPBRG
value
(decimal)
25 MHz
SPBRG
value
(decimal)
20 MHz
SPBRG
value
(decimal)
KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 NA - - NA - - NA - - NA - -
1.2 NA - - NA - - NA - - NA - -
2.4 NA - - 2.40 -0.07 214 2.40 -0.15 162 2.40 +0.16 129
9.6 9.62 +0.16 64 9.55 -0.54 53 9.53 -0.76 40 9.47 -1.36 32
19.2 18.94 -1.36 32 19.10 -0.54 26 19.53 +1.73 19 19.53 +1.73 15
76.8 78.13 +1.73 7 73.66 -4.09 6 78.13 +1.73 4 78.13 +1.73 3
96 89.29 -6.99 6 103.13 +7.42 4 97.66 +1.73 3 104.17 +8.51 2
300 312.50 +4.17 1 257.81 -14.06 1 NA - - 312.50 +4.17 0
500 625 +25.00 0 NA - - NA - - NA - -
HIGH 625 - 0 515.63 - 0 390.63 - 0 312.50 - 0
LOW 2.44 - 255 2.01 - 255 1.53 - 255 1.22 - 255
BAUD
RATE
(Kbps)
F
OSC = 16 MHz
SPBRG
value
(decimal)
10 MHz
SPBRG
value
(decimal)
7.15909 MHz
SPBRG
value
(decimal)
5.0688 MHz
SPBRG
value
(decimal)
KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 NA - - NA - - NA - - NA - -
1.2 1.20 +0.16 207 1.20 +0.16 129 1.20 +0.23 92 1.20 0 65
2.4 2.40 +0.16 103 2.40 +0.16 64 2.38 -0.83 46 2.40 0 32
9.6 9.62 +0.16 25 9.77 +1.73 15 9.32 -2.90 11 9.90 +3.13 7
19.2 19.23 +0.16 12 19.53 +1.73 7 18.64 -2.90 5 19.80 +3.13 3
76.8 83.33 +8.51 2 78.13 +1.73 1 111.86 +45.65 0 79.20 +3.13 0
96 83.33 -13.19 2 78.13 -18.62 1 NA - - NA - -
300 250 -16.67 0 156.25 -47.92 0 NA - - NA - -
500 NA - - NA - - NA - - NA - -
HIGH 250 - 0 156.25 - 0 111.86 - 0 79.20 - 0
LOW 0.98 - 255 0.61 - 255 0.44 - 255 0.31 - 255
BAUD
RATE
(Kbps)
F
OSC = 4 MHz
SPBRG
value
(decimal)
3.579545 MHz
SPBRG
value
(decimal)
1 MHz
SPBRG
value
(decimal)
32.768 kHz
SPBRG
value
(decimal)
KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 0.30 -0.16 207 0.30 +0.23 185 0.30 +0.16 51 0.26 -14.67 1
1.2 1.20 +1.67 51 1.19 -0.83 46 1.20 +0.16 12 NA - -
2.4 2.40 +1.67 25 2.43 +1.32 22 2.23 -6.99 6 NA - -
9.6 8.93 -6.99 6 9.32 -2.90 5 7.81 -18.62 1 NA - -
19.2 20.83 +8.51 2 18.64 -2.90 2 15.63 -18.62 0 NA - -
76.8 62.50 -18.62 0 55.93 -27.17 0 NA - - NA - -
96 NA - - NA - - NA - - NA - -
300 NA - - NA - - NA - - NA - -
500 NA - - NA - - NA - - NA - -
HIGH 62.50 - 0 55.93 - 0 15.63 - 0 0.51 - 0
LOW 0.24 - 255 0.22 - 255 0.06 - 255 0.002 - 255