*VXI Register Interface mates with user's PCB to form a B or C-size module.* 48 Digital IO Lines - Three 16-bit registers set as latched outputs or gated inputs.* 16 line bi-directional expansion bus for driving external logic.* Digital IO and VXIbus lines are 3.3V logic levels and are 5 V tolerant for compatibility with 3.3V logic and 5V VXIbus signals.* User selectable 3.3 and 5 Vdc puliup voltage on the digital IO lines for sensing switches etc.* The VXI-5524A board is a complete VXI-1 Rev 1.4 and VXI-2 compliant register-based interface.* User configurable model number, manufacturer ID, version and serial numbers.* Two companion component boards available for prototyping IC or RF assemblies.* Companion hardware kits available for building 1, 2 or 3-slot wide modules.