The Emerson/Motorola MVME162PA-252SE is a double-high VME embedded controller engineered for demanding industrial real-time control, data acquisition, and communication tasks. Built on a robust VMEbus architecture, it delivers master/slave functionality with flexible address and data bus configurations. The board accommodates either an MC68LC040 microprocessor or an MC68040 with integrated floating-point coprocessor, both operating at 25 MHz. Configurable memory options range from 1 MB to 32 MB of DRAM with parity or ECC protection, supplemented by 512 KB of battery-backed SRAM and 8K x 8 NVRAM. The controller integrates two serial ports (user-configurable for EIA-232-D, EIA-530, or EIA-422 protocols), two to four IndustryPack® expansion ports with DMA support, and optional SCSI and Ethernet interfaces.
## Technical Specifications
• **Microprocessor:** MC68LC040 or MC68040 (with FPU) at 25 MHz
• **DRAM:** 1 MB, 4 MB, 8 MB, 16 MB, or 32 MB (configurable, parity or ECC protected)
• **SRAM:** 512 KB with battery backup
• **Flash Memory:** 1 MB (on-board firmware/monitor)
• **NVRAM:** 8K x 8 with battery backup
• **Time-of-Day Clock:** Battery-backed
• **Timers:** Six tick timers, one watchdog timer, four 16-bit timers
• **VMEbus Interface:** A16/A24/A32 addressing; D8/D16/D32 data widths; A32/D64 burst DMA capability
• **Serial Ports:** Two EIA-232-D DTE ports with user-configurable second port (EIA-530 or EIA-422 optional)
• **IndustryPack® Ports:** Two 16-bit or one 32-bit (alternately, four 16- or 32-bit) with dedicated DMA
• **Optional Interfaces:** SCSI bus with DMA; Ethernet LAN transceiver with DMA
• **EPROM Sockets:** Two 32-pin JEDEC DIP or one 32-pin PLCC
• **Form Factor:** Double-high VME module; 233.4 mm H × 160.0 mm D × 19.8 mm W
## Key Features
• Master/slave VMEbus system controller function
• Battery-backed real-time clock and SRAM for mission-critical retention
• High-performance DMA for VMEbus and local memory burst cycles
• Onboard debugger and diagnostic firmware
• Remote reset, abort, and status control
• Memory configuration switches for application-specific sizing
## Typical Applications
Real-time industrial control systems, embedded data acquisition platforms, VMEbus system management, communication gateways, and harsh-environment process monitoring.
## Compatibility & Integration
Full VMEbus compliance (A16/A24/A32, D8/D16/D32). IndustryPack® module support. Optional SCSI and Ethernet expansion for networked or storage-intensive deployments.
