Measurement-computing PCI-COM232 Bedienungsanleitung PDF herunterladen (Seite 17)

4.2.3 PORT 2 CLOCK SELECT / INTERRUPT STATUS

BADR3 + 07 hex

READ

76543210

--PORT2

CKSEL1

PORT2

CKSEL0

INT4 INT3 INT2 INT1

WRITE

76543210

--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

76543210

--PORT3

CKSEL1

PORT3

CKSEL0

INT4 INT3 INT2 INT1

WRITE

76543210

--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

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 23 24

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