Introducing the pci-dio24h, Software features – Measurement Computing PCI-DIO24H User Manual
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Chapter 1
Introducing the PCI-DIO24H
This manual explains how to install and use the PCI-DIO24H board. The PCI-DIO24H is a high output drive,
logic-level digital I/O board designed for the PCI-bus.
The PCI-DIO24H provides 24-bits of digital I/O in three eight-bit ports (Port A, Port B, and Port C) based on
an 82C55 mode 0 emulation. Port C can be further divided into two four-bit ports (Port C-HI and Port C-LO).
You can configure each port independently for either input or output.
All digital inputs are LSTTL. The output signals are buffered high output drive TTL. The digital output drivers
are 74S244 chips that can sink 64 mA and source 15 mA. The input buffers are 74LS373 chips and have
standard high input impedance of the 74LS series devices.
All 24 I/O lines are accessible through the board's 37-pin connector.
82C55 Mode 0 programming supported
The PCI-DIO24H supports 82C55 Mode 0 programming only.
Software features
For information on the features of InstaCal and the other software included with your PCI-DIO24H, refer to the
Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at
Check
for the latest software version or versions of the software supported
under less commonly used operating systems.