Datasheet

PIC18F2220/2320/4220/4320
DS39599G-page 200 © 2007 Microchip Technology Inc.
TABLE 18-4: BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 1, HIGH SPEED)
BAUD
RATE
(K)
F
OSC = 40.000 MHz FOSC = 20.000 MHz FOSC = 16.000 MHz FOSC = 10.000 MHz
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
Actual
Rate
(K)
%
Error
SPBRG
value
(decimal)
2.4 — — — 4.88 103.45 255 3.91 62.76 255 2.44 1.73 255
9.6 9.77 1.73 255 9.62 0.16 129 9.62 0.16 103 9.63 0.16 64
19.2 19.23 0.16 129 19.23 0.16 64 19.23 0.16 51 18.94 -1.36 32
38.4 38.46 0.16 64 37.88 -1.36 32 38.46 0.16 25 39.06 1.73 15
57.6 58.14 0.94 42 56.82 -1.36 21 58.82 2.12 16 56.82 -1.36 10
76.8 75.76 -1.36 32 78.13 1.73 15 76.92 0.16 12 78.13 1.73 7
96.0 96.15 0.16 25 96.15 0.16 12 100.00 4.17 9 89.29 -6.99 6
115.2 113.64 -1.36 21 113.64 -1.36 10 111.11 -3.55 8 125.00 8.51 4
250.0 250.00 0.00 9 250.00 0.00 4 250.00 0.00 3 208.33 -16.67 2
300.0 312.50 4.17 7 312.50 4.17 3 333.33 11.11 2 312.50 4.17 1
500.0 500.00 0.00 4 416.67 -16.67 2 500.00 0.00 1 — — —
625.0 625.00 0.00 3 625.00 0.00 1 — — — 625.00 0.00 0
1000.0 833.33 -16.67 2 — — — 1000.00 0.00 0 — — —
1250.0 1250.00 0.00 1 1250.00 0.00 0 — — — — — —
BAUD
RATE
(K)
F
OSC = 8.000000 MHz FOSC = 7.159090 MHz FOSC = 5.068800 MHz FOSC = 4.000 MHz
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
0.3 — — — — — — — — — 0.98 225.52 255
1.2 1.95 62.76 255 1.75 45.65 255 1.24 3.13 255 1.20 0.16 207
2.4 2.40 0.16 207 2.41 0.23 185 2.40 0.00 131 2.40 0.16 103
9.6 9.62 0.16 51 9.52 -0.83 46 9.60 0.00 32 9.62 0.16 25
19.2 19.23 0.16 25 19.45 1.32 22 18.64 -2.94 16 19.23 0.16 12
38.4 38.46 0.16 12 37.29 -2.90 11 39.60 3.13 7 35.71 -6.99 6
57.6 55.56 -3.55 8 55.93 -2.90 7 52.80 -8.33 5 62.50 8.51 3
76.8 71.43 -6.99 6 74.57 -2.90 5 79.20 3.13 3 83.33 8.51 2
96.0 100.00 4.17 4 89.49 -6.78 4 — — — — — —
115.2 125.00 8.51 3 111.86 -2.90 3 105.60 -8.33 2 125.00 8.51 1
250.0 250.00 0.00 1 223.72 -10.51 1 — — — 250.00 0.00 0
300.0 — — — — — — 316.80 5.60 0 — — —
500.0 500.00 0.00 0 447.44 -10.51 0 — — — — — —
BAUD
RATE
(K)
F
OSC = 3.579545 MHz FOSC = 2.000000 MHz FOSC = 1.000000 MHz FOSC = 0.032768 MHz
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
Actual
Rate (K)
%
Error
SPBRG
value
(decimal)
0.3 0.87 191.30 255 0.49 62.76 255 0.30 0.16 207 0.29 -2.48 6
1.2 1.20 0.23 185 1.20 0.16 103 1.20 0.16 51 1.02 -14.67 1
2.4 2.41 0.23 92 2.40 0.16 51 2.40 0.16 25 2.05 -14.67 0
9.6 9.73 1.32 22 9.62 0.16 12 8.93 -6.99 6 — — —
19.2 18.64 -2.90 11 17.86 -6.99 6 20.83 8.51 2 — — —
38.4 37.29 -2.90 5 41.67 8.51 2 31.25 -18.62 1 — — —
57.6 55.93 -2.90 3 62.50 8.51 1 62.50 8.51 0 — — —
76.8 74.57 -2.90 2 — — — — — — — — —
115.2 111.86 -2.90 1 125.00 8.51 0 — — — — — —
250.0 223.72 -10.51 0 — — — — — — — — —