Page 1-1
Manual 00650-526-1
Chapter 1: Introduction
Features
•
48 Bits of Digital Input/Output.
•
Interrupt Generation on Input Change of State.
•
Change-of-state Interrupt Software Enabled in Six 8-Input Ports.
•
All 48 I/O Lines Buffered on the Board.
•
I/O Buffers Can Be Enabled/Disabled under Program Control.
•
Four and Eight Bit Ports Independently Selectable for I/O.
•
Pull-Ups on I/O Lines.
•
+5V Supply Available to the User.
•
Compatible with Industry Standard I/O Racks like Gordos, Opto-22, Potter & Brumfield,
etc.
Applications
•
Automatic Test Systems.
•
Laboratory Automation.
•
Robotics.
•
Machine Control.
•
Security Systems, Energy Management.
•
Relay Monitoring and Control.
•
Parallel Data Transfer to PC.
•
Sensing Switch Closures or TTL, DTL, CMOS Logic.
•
Driving Indicator Lights or Recorders.
Description
The state of all inputs can be monitored and, if any one or more bits change state, a latched
interrupt request can be generated. Thus, it is not necessary to use software to continuously poll
the inputs to detect a change of state. The change-of-state interrupt is enabled by a software write
to an interrupt-enable register. Six bits in that register each control an eight-input port at one of
two type 8255-5 Programmable Peripheral Interface chips. The change-of-state interrupt latch can
be cleared by a software write.
Summary of Contents for DIO48S/AT-P Series
Page 1: ...DIO48S AT P Series Product Manual MANUAL NUMBER 00650 526 1B...
Page 3: ...Page iv This page intentionally left blank...
Page 7: ...Page viii This page intentionally left blank...
Page 13: ...DIO48S AT P Manual Page 1 4 Manual 00650 526 1 Figure 1 1 DIO48S AT P Block Diagram...
Page 20: ...DIO48S AT P Manual Page 3 2 Manual 00650 526 1 Figure 3 1 DIO48S AT P Option Selection Map...