Introducing the cio-dio24, Overview: cio-dio24 features, Software features – Measurement Computing CIO-DIO24 User Manual
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Chapter 1
Introducing the CIO-DIO24
Overview: CIO-DIO24 features
The CIO-DIO24 has 24 digital I/O connections, and one 82C55 parallel-interface chip.
Each 82C55 chip controls 24 CMOS/TTL-compatible digital I/O pins. The 82C55 is configured as two 8-bit
ports and two 4-bit ports. Each port is programmable for input or output.
All I/O bits are set to input mode (high impedance) on power up and reset. If you are using the board to control
items that must be OFF on reset, install pull-down resistors. The board is equipped with open locations where
you can install SIP resistor networks for either pull-up or pull-down.
All signals pass through a 37-pin connector.
Software features
For information on the features of InstaCal and the other software included with your CIO-DIO24, refer to the
Quick Start Guide
that shipped with your device. The Quick Start Guide is also available in PDF at
.
for the latest software version.
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