The MVME335A is a high-reliability serial communication interface module designed for VMEbus-based embedded systems, typically manufactured by Motorola (now part of NXP Semiconductors).
Controller Core: Equipped with high-performance serial communication controllers (commonly based on industry-standard 16550-compatible UARTs or advanced SCC chips), ensuring stable data transmission.
Channel Configuration: Typically provides multiple asynchronous serial communication channels (specific quantity varies by model, usually 4 or more), supporting EIA-232-D, EIA-422, or EIA-485 communication standards (configurable via jumpers or software).
Transmission Parameters: Supports flexible adjustment of baud rates, data bits, stop bits, and parity check modes, adapting to different serial communication protocol requirements.
2. VMEbus Interface Integration
VMEbus Compliance: Fully compatible with VMEbus standards (ANSI/VITA 1-1994), supporting A16/A24/A32 address spaces and D8/D16 data widths for seamless integration into VMEbus system architectures.
Interrupt Support: Features vectored interrupt capability, enabling the module to send interrupt requests to the VMEbus main controller when serial data is received or transmitted, ensuring real-time response of the system.
3. Reliability & Industrial-Grade Design
Component Selection: Adopts industrial-grade electronic components, supporting a wide operating temperature range (typically -40°C to +85°C for extended temperature models, 0°C to +55°C for commercial temperature models), with strong resistance to electromagnetic interference (EMI) and vibration.
Protection Mechanisms: Integrated with overvoltage and electrostatic protection circuits on serial ports to prevent damage to the module caused by abnormal external signals.
4. Configuration & Management
Configuration Methods: Supports hardware configuration (via jumpers) and software configuration (via register programming), allowing users to flexibly set communication parameters and working modes according to application scenarios.
Diagnostic Functions: Equipped with basic self-diagnostic capabilities, enabling real-time monitoring of the module’s working status and communication links, facilitating system maintenance and troubleshooting.
Typical Application Scenarios
Industrial Automation: Used in industrial control systems to connect serial devices such as PLCs, human-machine interfaces (HMIs), and sensors, realizing data interaction between field devices and the central control system.
Aerospace & Defense: Applied in airborne, shipborne, and ground-based military equipment, providing reliable serial communication links for command and control, data transmission, and equipment monitoring.
Test & Measurement Equipment: As a serial communication interface unit in precision test instruments, connecting to tested devices to complete data collection and command issuance.
Transportation & Energy: Used in rail transit signal control systems, power grid monitoring devices, etc., ensuring stable transmission of serial data in harsh industrial environments.
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