The National Instruments VXI-1394 is an IEEE 1394 (FireWire) interface module that bridges PCI-based computers with external VXI systems. It functions as a Slot 0 VXI controller, enabling high-speed bidirectional data transfer, DMA operations, and direct trigger/interrupt control between the host computer and VXI mainframe. The module leverages custom MITE and MANTIS ASICs to deliver sustained throughput of 11 Mbytes/s across a flexible cabling topology supporting up to 16 daisy-chained IEEE 1394 devices.
– Technical Specifications
• Interface: IEEE 1394 (FireWire) to VXIbus bridge
• Data Transfer Rate: 400 Mbits/s maximum
• Sustained Throughput: 11 Mbytes/s
• VXI Slot 0 Functionality: Full slot identification, bus management, and CLK10 backplane signal generation
• Configuration Space: 64 B
• Cable Maximum Length: 4.5 m per segment; 72 m total (16 devices maximum)
• Form Factor: Single-slot C-size VXI module
• Host Connection: PCI-1394 adapter board
– Key Features
• Custom MITE and MANTIS ASICs for high-speed data transfer and control
• Bidirectional VXI transfers with direct RAM sharing capability
• Hot plug-in support under Windows without system restart
• Tree topology support with up to 16 IEEE 1394 device daisy-chaining
• Thin, flexible 6-wire shielded IEEE 1394 cable included
• Optional VXI-1394/G variant adds IEEE 488 (GPIB) front-panel connector for hybrid GPIB/VXI system control
– Typical Applications
Automated test systems, real-time signal processing, data acquisition, and VXI instrument control from external computers without embedded controller infrastructure.
– Compatibility & Integration
Fully VXIplug&play compliant. Includes NI-VXI and NI-VISA driver software. Compatible with LabVIEW, LabWindows/CVI, and Measurement Studio. Supports industry-standard OHCI host adapters; native OHCI IEEE 1394 ports on the host PC may substitute for the PCI-1394 board. Originally designed for Windows 2000/NT/Me/98; Windows NT 4 may require dedicated National Instruments drivers.
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