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OPERATIONS MANUAL PCM-UIO48B
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This manual is intended to provide the necessary information regarding configuration and
usage of the PCM-UIO48B board. WinSystems maintains a Technical Support Group to help
answer questions regarding usage or programming of the board. For answers to questions not
adequately addressed in this manual, contact Technical Support at (817) 274-7553, Monday
through Friday, between 8 AM and 5 PM Central Standard Time (CST).
General Information
Introduction
Features
General Description
The PCM-UIO48B is a highly versatile PC/104 input/output module providing 48 lines of
digital I/O. It is unique in its ability to monitor 24 lines for both rising and falling digital edge
transitions, latch them, and then issue an interrupt to the host processor. The application
interrupt service routine can quickly determine, through a series of interrupt identification
registers, the exact port(s) and bit(s) which have transitioned. The PCM-UIO48B utilizes
WinSystems’ WS16C48 ASIC High Density I/O (HDIO) Chip. The first 24 lines are capable of
fully latched event sensing with the sense polarity being software programmable. Two 50-pin
I/O connectors allow for easy mating with industry standard I/O racks.
Digital I/O
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48 Bidirectional lines with Input, Output or Output with Readback (WS16C48)
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12 mA Sink Current
Event Sense
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Supports 24 event sense lines
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Programmable polarity for each line
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Software-enabled interrupt for each Line
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Change-of-state latched for each line
Power
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+5V @ 12 mA required
Industrial Operating Temperature Range
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-40°C to 85°C
Form Factor
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PC/104-compliant
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3.60” x 3.80” (90 mm x 96 mm)
Additional Specifications
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Compatible with industry standard I/O racks
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Write-protection mask register for each port
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Fused +5V logic supply for I/O modules
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8-bit, 16-bit PC/104 Interface
