The Hytec Electronics VSD2992 is a 6U VME Serial Highway Driver that interfaces VMEbus systems with CAMAC serial highway networks. Operating as a VME Slave Module with A16/D16 and D08(E0) addressing capability, it functions as a ROAK D08 Interrupter and manages bidirectional serial communication in industrial control environments. The module initiates and receives serial messages through command and data registers, supporting both bit serial and byte serial transmission modes with integrated parity validation.
## Technical Specifications
**VMEbus Interface**
• VME Slave Module: A16/D16 and D08(E0) addressing modes
• ROAK D08 Interrupter operation
• Selectable interrupt levels 1–7 via jumper
• Writable and readable interrupt vectors
• 12-bit Maskable LAM Register with selective clear and set functions
• Overall “allow interrupt” control bit
• All mask and control registers clear on power-up or VMEbus reset
**Serial Highway & Data Transmission**
• CAMAC serial highway communication
• Bit serial and byte serial transmission modes
• Separate data and clock ports for each mode
• 64-word FIFO demand buffer
• Reply message buffering with separate Reply Buffer
• Repeat Read Mode and Q-Scan Mode support
• Reply Timeout and Echo Mode support
**Clocking & Frequency**
• Internal crystal-controlled clock source
• Variable frequency oscillator option
• External clock input to 5 MHz maximum
• Internal oscillator division providing transmission rates from approximately 1 kHz to 5 MHz
**Error Detection & Diagnostics**
• Transverse and longitudinal parity checking
• Lost Sync Indicator
• 64-byte Test Message Generator with error injection capability
• Dump Store for message analysis
## Key Features
• Multi-master operation via module booking mechanism
• Comprehensive LAM interrupt architecture with fine-grained masking
• Flexible clock source selection for varying serial highway speeds
• Built-in diagnostics and test message generation
• Hytec U-Port Adaptor compatibility
## Typical Applications
VMEbus-based data acquisition systems, CAMAC detector control networks, and multi-crate experimental apparatus requiring serial inter-module communication and synchronized interrupt handling.
## Compatibility & Integration
Designed for 6U VME form factor systems. Operates as both addressable slave device and interrupt generator within VMEbus architecture.
