The PCI-1737U is a 24-bit DI/O card with PCI bus, and provides 24 bits
of parallel digital input/output. It also emulates mode 0 of the 8255
PPI chip, but the buffered circuits offer a higher driving capability
than the 8255. The I/O bits are divided into three 8-bit I/O ports: A0,
B0, and C0. You can configure each port as either input or output via
software. The interrupt handling capability provides users the
flexibility to generate interrupts to a PC. The 1-pin in the connector
can output a digital signal simultaneously with the card's generating
an interrupt. Other features give the PCI-1737U practical advantages in
an industrial setting; when the system is hot reset or powered on, the
I/O port settings and output values of PCI-1737U will be determined via
switch.
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