The Measurement Computing PCI-DIO96 is a high-density digital I/O board for PCI Local Bus Specification Revision 2.1 systems, delivering 96 lines of digital I/O organized into four 24-bit groups. Each group comprises three 8-bit ports controlled by an 82C55 Programmable Peripheral Interface chip, with PORT C subdividing into two 4-bit nibbles for flexible configuration. All ports can be individually programmed as input or output, supporting TTL/CMOS logic levels.
Technical Specifications
Digital I/O Channels
• 96 total lines organized into four 24-bit groups
• TTL/CMOS compatible with LSTTL input compatibility
• Input buffers feature standard high impedance
• Output drivers sink 64 mA and source 15 mA
• Outputs latched; inputs unlatched
• 100 kΩ bias resistors default all lines to high at power-up
Timing and Control
• 82C53 programmable interval timer for register-level timing and interrupt generation
• Bidirectional, unidirectional, and 2-wire handshake mode support
• Programmable interrupt sources: Port C0–C3 from each 82C55 device and Counter 1/2 OUT from the timer
• Interrupt polarity (high/low level) and edge (rising/falling) selectable via PLX9052 INTCSR register
• Maximum one counter enabled as interrupt source simultaneously
Power Requirements
• +5 VDC quiescent: 150 mA max
• Operating: 400 mA at +5 VDC (±5%)
– Key Features
• Four 82C55 PPI chips enable independent port configuration and handshaking
• 100-pin high-density Robinson-Nugent male connector for I/O
• Optional C100FF-x cable splits 100 I/O lines into dual 50-pin connectors
• R1005050 cable bridges 100-pin connector to 50-pin accessories
– Typical Applications
Industrial automation control, multi-channel sensor interfacing, external device synchronization, and systems requiring high-density TTL/CMOS logic switching with programmable timing.
– Compatibility & Integration
PCI Local Bus Specification Revision 2.1 compliant. Dimensions: 5.4 × 4.2 inches.
