The National Instruments VXI-MXI REV D9 is a register-based VXI interface module that bridges VXI systems with external devices through bidirectional VXIbus and MXIbus cycle interconversion. This 32-bit MXIbus interface enables seamless integration of VXI instruments, mainframes, and external PCs into unified test architectures. The module supports dynamic device configuration and high-speed data transfers using integrated block mode, achieving 33 MB/s burst rate and 23 MB/s sustained throughput across the MXIbus.
The VXI-MXI operates in both C-size and D-size VXI chassis via Slot 0 capability, extending VXIbus functionality to multiple external devices or interconnecting multiple mainframes as a single VXIbus system. Eight TTL backplane triggers and CLK10 can be extended between chassis using a daisy-chain topology supporting up to six devices across 19 m of total cable length. Front panel connectors provide convenient trigger and clock extension interfaces based on TIA/EIA-899 M-LVDS signaling standards.
Technical Specifications
• Module Type: Register-based VXIbus module
• VXIbus Interface: 32-bit MXIbus interface
• Slot Capability: Slot 0 operation in C-size and D-size VXI chassis
• Data Transfer Rate: 33 MB/s burst rate; 23 MB/s sustained throughput
• Trigger Extension: 8 TTL backplane triggers plus CLK10
• Trigger Topology: Daisy-chain, up to six devices, maximum 19 m cable length
• Trigger Interface Standard: TIA/EIA-899 M-LVDS
• ASIC Integration: MITE custom ASIC
– Key Features
• Full VXIbus and MXIbus specification compliance
• Automatic Slot 0 detection eliminating jumper or switch configuration
• MXIbus multimaster system bus on cable
• External PC connectivity via MXIbus
• High-speed integrated block mode operation
– Compatibility & Integration
• Required Drivers: NI-VISA and NI-VXI
• Framework: VXIplug&play compliant; WINNT/GWINNT compatible
• Development Environments: NI LabVIEW, LabWindows/CVI, Microsoft Visual Studio
