Datasheet

PIC17C4X
DS30412C-page 88  1996 Microchip Technology Inc.
TABLE 13-4: BAUD RATES FOR ASYNCHRONOUS MODE
BAUD
RATE
(K)
F
OSC
= 33 MHz
SPBRG
value
(decimal)
F
OSC
= 25 MHz
SPBRG
value
(decimal)
F
OSC
= 20 MHz
SPBRG
value
(decimal)
F
OSC
= 16 MHz
SPBRG
value
(decimal)KBAUD %ERROR KBAUD %ERROR KBAUD %ERROR KBAUD %ERROR
0.3 NA — — NA — — NA — — NA — —
1.2 NA — — NA — — 1.221 +1.73 255 1.202 +0.16 207
2.4 2.398 -0.07 214 2.396 0.14 162 2.404 +0.16 129 2.404 +0.16 103
9.6 9.548 -0.54 53 9.53 -0.76 40 9.469 -1.36 32 9.615 +0.16 25
19.2 19.09 -0.54 26 19.53 +1.73 19 19.53 +1.73 15 19.23 +0.16 12
76.8 73.66 -4.09 6 78.13 +1.73 4 78.13 +1.73 3 83.33 +8.51 2
96 103.12 +7.42 4 97.65 +1.73 3 104.2 +8.51 2 NA — —
300 257.81 -14.06 1 390.63 +30.21 0 312.5 +4.17 0 NA — —
500 515.62 +3.13 0 NA — — NA — — NA — —
HIGH 515.62 — 0 — — 0 312.5 — 0 250 — 0
LOW 2.014 — 255 1.53 — 255 1.221 — 255 0.977 — 255
BAUD
RATE
(K)
F
OSC
= 10 MHz
SPBRG
value
(decimal)
F
OSC
= 7.159 MHz
SPBRG
value
(decimal)
F
OSC
= 5.068 MHz
SPBRG
value
(decimal)KBAUD %ERROR KBAUD %ERROR KBAUD %ERROR
0.3 NA — — NA — — 0.31 +3.13 255
1.2 1.202 +0.16 129 1.203 _0.23 92 1.2 0 65
2.4 2.404 +0.16 64 2.380 -0.83 46 2.4 0 32
9.6 9.766 +1.73 15 9.322 -2.90 11 9.9 -3.13 7
19.2 19.53 +1.73 7 18.64 -2.90 5 19.8 +3.13 3
76.8 78.13 +1.73 1 NA — — 79.2 +3.13 0
96 NA — — NA — — NA — —
300 NA — — NA — — NA — —
500 NA — — NA — — NA — —
HIGH 156.3 — 0 111.9 — 0 79.2 — 0
LOW 0.610 — 255 0.437 — 255 0.309 — 2 55
BAUD
RATE
(K)
F
OSC
= 3.579 MHz
SPBRG
value
(decimal)
F
OSC
= 1 MHz
SPBRG
value
(decimal)
F
OSC
= 32.768 kHz
SPBRG
value
(decimal)KBAUD %ERROR KBAUD %ERROR KBAUD %ERROR
0.3 0.301 +0.23 185 0.300 +0.16 51 0.256 -14.67 1
1.2 1.190 -0.83 46 1.202 +0.16 12 NA — —
2.4 2.432 +1.32 22 2.232 -6.99 6 NA — —
9.6 9.322 -2.90 5 NA — — NA — —
19.2 18.64 -2.90 2 NA — — NA — —
76.8 NA — — NA — — NA — —
96 NA — — NA — — NA — —
300 NA — — NA — — NA — —
500 NA — — NA — — NA — —
HIGH 55.93 — 0 15.63 — 0 0.512 — 0
LOW 0.218 — 255 0.061 — 255 0.002 — 255