PIC16F627A Datasheet, PDF (75/168 Pages) Microchip Technology – FLASH-Based 8-Bit CMOS Microcontrollers

PIC16F627A/628A/648A
TABLE 12-4: BAUD RATES FOR ASYNCHRONOUS MODE (BRGH = 0)
BAUD ^{FOSC = 20 MHz}
RATE (K) _{KBAUD ERROR}
SPBRG 16 MHz
value
(decimal) ^KBAUD
ERROR
SPBRG 10 MHz
value
(decimal) ^KBAUD
0.3
1.2
2.4
9.6
19.2
76.8
96
300
500
HIGH
LOW
NA
—
—
1.221
+1.73%
255
2.404
+0.16%
129
9.469
-1.36%
32
19.53
+1.73%
15
78.13
+1.73%
3
104.2
+8.51%
2
312.5
+4.17%
0
NA
—
—
312.5
—
0
1.221
—
255
NA
—
—
1.202
+0.16%
207
2.404
+0.16%
103
9.615
+0.16%
25
19.23
+0.16%
12
83.33
+8.51%
2
NA
—
—
NA
—
—
NA
—
—
250
—
0
0.977
—
255
NA
1.202
2.404
9.766
19.53
78.13
NA
NA
NA
156.3
0.6104
ERROR
—
+0.16%
+0.16%
+1.73%
+1.73V
+1.73%
—
—
—
—
—
SPBRG
value
(decimal)
—
129
64
15
7
1
—
—
—
0
255
BAUD ^{FOSC = 7.15909 MHz}
RATE (K) _{KBAUD ERROR}
0.3
1.2
2.4
9.6
19.2
76.8
96
300
500
HIGH
LOW
NA
1.203
2.380
9.322
18.64
NA
NA
NA
NA
111.9
0.437
—
+0.23%
-0.83%
-2.90%
-2.90%
—
—
—
—
—
—
SPBRG 5.0688 MHz
value
(decimal) ^KBAUD
—
0.31
92
1.2
46
2.4
11
9.9
5
19.8
—
79.2
—
NA
—
NA
—
NA
0
79.2
255
0.3094
ERROR
+3.13%
0
0
+3.13%
+3.13%
+3.13%
—
—
—
—
—
SPBRG 4 MHz
value
(decimal) ^KBAUD
255
0.3005
65
1.202
32
2.404
7
NA
3
NA
0
NA
—
NA
—
NA
—
NA
0
62.500
255
3.906
ERROR
-0.17%
+1.67%
+1.67%
—
—
—
—
—
—
—
—
SPBRG
value
(decimal)
207
51
25
—
—
—
—
—
—
0
255
BAUD ^{FOSC = 3.579545 MHz}
RATE (K) _{KBAUD ERROR}
0.3
1.2
2.4
9.6
19.2
76.8
96
300
500
HIGH
LOW
0.301
1.190
2.432
9.322
18.64
NA
NA
NA
NA
55.93
0.2185
+0.23%
-0.83%
+1.32%
-2.90%
-2.90%
—
—
—
—
—
—
SPBRG 1 MHz
value
(decimal) ^KBAUD
185
0.300
46
1.202
22
2.232
5
NA
2
NA
—
NA
—
NA
—
NA
—
NA
0
15.63
255
0.0610
ERROR
+0.16%
+0.16%
-6.99%
—
—
—
—
—
—
—
—
SPBRG 32.768 kHz
value
(decimal) ^KBAUD
51
0.256
12
NA
6
NA
—
NA
—
NA
—
NA
—
NA
—
NA
—
NA
0
0.512
255
0.0020
ERROR
-14.67%
—
—
—
—
—
—
—
—
—
—
SPBRG
value
(decimal)
1
—
—
—
—
—
—
—
—
0
255
 2002 Microchip Technology Inc.
Preliminary
DS40044A-page 73