Measurement Computing PCI-COM232 User Manual
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4.2.3
PORT 2 CLOCK SELECT / INTERRUPT STATUS
BADR3 + 07 hex
READ
7
6
5
4
3
2
1
0
-
-
PORT2
CKSEL1
PORT2
CKSEL0
INT4
INT3
INT2
INT1
WRITE
7
6
5
4
3
2
1
0
-
-
PORT2
CKSEL1
PORT2
CKSEL0
-
-
-
-
INTx
Interrupt status for each port. The same signals are connected to this read register for all four
ports.
CKSEL1:0 UART clock select. This allows transmission rates up to 460.8 Kbaud and different data rates
on each port. These settings are per port:
CKSEL1
CKSEL0
UART CLOCK
Max Data Rate
0
0
1.8432 MHz
115.2 kbaud
0
1
3.6864 MHz
230.4 kbaud
1
0
7.3728 MHz
460.8 kbaud
4.2.4
PORT 3 CLOCK SELECT / INTERRUPT STATUS
BADR4 + 07 hex
READ
7
6
5
4
3
2
1
0
-
-
PORT3
CKSEL1
PORT3
CKSEL0
INT4
INT3
INT2
INT1
WRITE
7
6
5
4
3
2
1
0
-
-
PORT3
CKSEL1
PORT3
CKSEL0
-
-
-
-
INTx
Interrupt status for each port. The same signals are connected to this read register for all four
ports.
CKSEL1:0
UART clock select. This allows for data rates to 460.8 Kbaud and different data rates on
each port. These settings are per port:
CKSEL1
CKSEL0
UART CLOCK
Max Data Rate
0
0
1.8432 MHz
115.2 kbaud
0
1
3.6864 MHz
230.4 kbaud
1
0
7.3728 MHz
460.8 kbaud