User manual

3 Chapter 1
Interrupt Functions Ensure Faster System Response
Two lines of each port C (i.e., ports C0, C1, C2 and C3) are connected to
an interrupt circuit. The “Interrupt Control Register” of the PCI-1753/
PCI-1753E controls how these signals generate an interrupt. More than
one interrupt request signals can be generated at the same time, and then
the software can process these request signals by ISR. The multiple inter-
rupt sources provide the card with more capability and flexibility.
The PCI-1753/1753E also provides “Pattern Match” interrupt function
for port A0. The card monitors the states of port A0 and compares them
with a pre-set pattern. When the received state matches the pre-set
pattern, the PCI-1753/1753E generates an interrupt signal to the system.
“Change of State” interrupt function is provided at port B0. When any
signal line of port B0 changes its state, the card generates an interrupt to
the system to handle this event.
These interrupt functions release the CPU from the burden of pulling all
I/O points, enabling a PC to handle more I/O points with higher
performance.
Cost Savings for Increasing the Number of Input/Output Lines
Industrial users are needing more and more digital I/O lines to transmit
data or to monitor/control outside devices. To meet this trend and to sat-
isfy user’s budget considerations, Advantech has developed an extension
board for the PCI-1753 called the PCI-1753E. The PCI-1753E has
almost the same structure as the PCI-1753, without the interface control-
ler. It shares PCI-1753’s interface controller through a 10-cm flat cable
connecting, so users can spend less money while doubling the number of
input/output lines.
Accessories for PCI-1753/1753E
The PCI-1753/1753E uses a 100-pin SCSI female connector. For easy
signal wiring, a PCI-1753 can be connected to two ADAM-3968s by a
100-pin to 2x68-pin SCSI cable (part number PCL-10268). The
ADAM-3968 allows easy access for wiring the individual pins of a
68-pin SCSI connector. An ADAM-3968/50 adapter board converts the
68-pin connector to two opto-22 compatible 50-pin box headers for
connecting the PCI-1753/1753E to daughterboards, such as PCLD-782B
and PCLD-785B.