
BAUD RATE SELECTION
The 16450 or 16550 UART determines the baud rate of the serial output
using a combination of the clock input frequency and the value written to the
divisor latches. Standard personal computer serial interfaces use an input clock of
1.8432 MHz. A table of baud rates available is given in Figure 22.
2.86
2
56000
-
3
38400
-
6
19200
-
12
9600
-
16
7200
-
24
4800
-
32
3600
-
48
2400
0.69
58
2000
-
64
1800
-
96
1200
-
192
600
-
384
300
-
768
150
0.026
1047
110
-
1536
75
-
2304
50
ERROR BETWEEN DESIRED AND ACTUAL
VALUES (%)
DIVISOR LATCH
VALUE
DESIRED BAUD
RATE
Figure 22 --- Divisor Latch settings for common baud rates
using 1.8432 MHz input clock
Quatech ES-100D User's Manual
23