Measurement Computing CIO-DIO48 - Manual (Page 6)

Chapter 1
Introducing the CIO-DIO48
Overview: CIO-DIO48 features
The CIO-DIO48 has 48 digital I/O connections, and two 82C55 parallel-interface chips.
Each 82C55 chip controls 24 CMOS/TTL-compatible digital I/O pins. You can program each 82C55 as three
8-bit ports, or 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. Locations are available for installing
pull-up or pull-down resistors.
All signals pass through a 50-pin connector.
Software features
For information on the features of InstaCal and the other software included with your CIO-DIO48, refer to the
Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf .
Check www.mccdaq.com/download.htm for the latest software version.
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