The Keysight MVXI1458 (E1458A) is a C-size, single-slot VXI digital I/O module designed for register-based control of digital input and output operations. With 96 channels organized into twelve 8-bit bi-directional ports, this module delivers flexible signal routing and data acquisition capabilities for digital subassembly testing, data acquisition, and control applications.
Technical Specifications
Architecture & Data Handling
• 96 total channels across twelve 8-bit bi-directional data ports
• Three banks of four ports each; ports within a bank combine for 8-bit, 16-bit, or 32-bit data transmission
• 325 Kb/s block transfer rate with 32-bit block transfer support
• TTL-compatible logic levels, 5 V maximum
• Register-based programming architecture
Handshake & Control Protocol
• Six standard GPIO handshake protocols: None, Leading Edge, Trailing Edge, Pulse, Partial, and Strobe
• Six handshake/control lines per port (FLAG, CTL, I/O)
• Three additional control lines per port (PIR, /RES, STS) for interrupt and peripheral reset functions
• Software triggers and hardware handshaking for test synchronization
Output Performance
• Iout (High): –5.2 mA @ Vout = 2.5 V (with pull-up enabled)
Port Configuration
Each 8-bit port configures independently for positive or negative true logic, read/write or tri-state operation. Data transmission routes from single or multiple ports up to all twelve simultaneously.
– Key Features
• Individually configurable 8-bit port logic polarity and direction
• Flexible data grouping across banks for multi-width transmission
• Per-port handshaking reduces external logic complexity
• Custom interrupt and reset signaling via PIR, /RES, and STS control lines
• SCPI command set compatibility with enhanced readback and monitoring queries
– Typical Applications
• Digital subassembly functional testing
• Multi-channel data acquisition systems
• Control interface for peripheral device synchronization
• Hardware-in-the-loop test environments requiring flexible I/O routing
– Compatibility & Integration
The E1458A maintains functional equivalence with the E1330B. SCPI application programs developed for the E1330B execute directly on the E1458A, with extended command support for port data readback and output monitoring capabilities.
