Measurement Computing PCI-DIO48H, Руководство пользователя

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Chapter 1
Introducing the PCI-DIO48H
Overview: PCI-DIO48H features
This manual explains how to install and use the PCI-DIO48H board. The PCI-DIO48H is a high-density,
logic-level digital I/O board designed for the PCI-bus.
The PCI-DIO48H provides 48-bits of digital I/O. The I/O is organized into two 24-bit groups based on an
82C55 mode 0 emulation. Each 24-bit group is divided into three eight-bit ports labeled PORTA, PORTB
and PORTC. PORTC can be split into two four-bit nibbles
— Port C-HI and Port C-LO. Each of these
ports may be individually programmed as 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.
On power up and reset, all I/O bits are set to input mode. If you are using the board to control items that
must be OFF on reset, install pull-down resistors. Each board is equipped with open locations where you
can install SIP resistor networks for either pull-up or pull-down.
The PCI-DIO48H board is completely plug-and-play, with no jumpers or switches to set. All board
addresses are set by the board's plug-and-play software. Board configuration is controlled by your
system's BIOS.
Software features
The following software ships with the PCI-DIO48H free of charge.
ƒ Insta Cal installation, calibration, and test utility
ƒ TracerDAQ™ suite of virtual instruments
ƒ SoftWIRE® for Visual Studio® .NET graphical programming
ƒ MCC DAQ Components for VS .NET (installed with SoftWIRE for VS .NET)
For information on the features of InstaCal , TracerDAQ, and SoftWIRE, refer to the DAQ Software
Quick Start booklet that shipped with the PCI-DIO48H.
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