Curtiss-Wright / VMETRO VDRIVE-PB(B) Piggyback Module

The Curtiss-Wright/VMETRO VDRIVE-PB(B) is a VMEbus piggyback module that functions as a Master, Slave, and System Controller for comprehensive testing and validation of VMEbus boards and systems. Built around the VIC068 VMEbus interface chip, it generates and responds to a full range of VMEbus cycle types under user command control. The module integrates with the VBT-325 VMEbus Analyzer, enabling simultaneous bus mastering and real-time analysis. Software-controlled configuration eliminates jumpers entirely, allowing dynamic adjustment of slave base addresses, cycle parameters, address sizes, and interrupt levels—making it ideal for automated manufacturing test environments.

## Technical Specifications

**Master Functions**
• Memory inspect, patch, and fill operations
• Test and loop execution
• Normal, block, and RMW (Read-Modify-Write) cycle support
• Operation at any Bus Request (BR) level
• Selectable release modes: RWD (Release When Done), ROR (Release On Request), ROC (Release On Cycle)

**Slave Functions**
• Software-controlled base address and window sizing
• Configurable window sizes: 64 KB, 128 KB, or 256 KB
• Address support: A32, A24, A16
• Data width support: D32, D16, D8 with unaligned 2- and 3-byte transfers

**Interrupt Subsystem**
• Configurable IRQ level and vector on IACK
• User-defined IRQ operation for interrupt handling
• On-screen display of level and vector status

**DTACK* Generator**
• Dedicated address decoder: 64 KB, 128 KB, or 256 KB window
• Programmable assertion delay: 30–590 ns
• Emulation support for planned but non-existent modules

**Data Pattern Generation**
• Walking Ones & Zeros patterns
• Address as Data patterns

## Key Features

• All parameters configured via software—no jumpers required
• Direct 5V supply voltage readout
• Real-time board temperature monitoring
• Parallel operation with VBT-325 analyzer
• VMEbus compliance via VIC068 interface chip

## Typical Applications

Automated VMEbus board manufacturing test, system-level validation, bus protocol verification, and development debugging when paired with the VBT-325 analyzer.

## Compatibility & Integration

Designed to interface with the Curtiss-Wright/VMETRO VBT-325 VMEbus Analyzer for enhanced testing and analysis capabilities.