The Emerson/Motorola VME162PA-252SE is a double-high VMEbus embedded controller built around the MC68LC040 or MC68040 32-bit microprocessor running at 25 MHz. The MC68040 variant includes an integrated floating-point coprocessor and 8KB cache; both feature an MMU. This module delivers real-time processing for industrial control, data acquisition, and VMEbus-based automation systems through configurable memory, multiple serial interfaces, and optional expansion via IndustryPack, Ethernet, and SCSI.
## Technical Specifications
**Processor:** MC68LC040 or MC68040 at 25 MHz; 8KB cache and MMU standard; MC68040 includes FPU.
**Memory:**
• DRAM: 1MB, 4MB, 8MB parity-protected, or 16MB/32MB SDRAM with optional ECC (expandable to 64MB)
• SRAM: 512KB or 128KB with battery backup
• NVRAM: 8K × 8 with battery backup
• Flash: 1MB; two 32-pin JEDEC DIP sockets for EPROM/Flash
**VMEbus Interface:**
• VMEchip2 ASIC controller with D64 burst support
• Address: A16/A24/A32; Data: D8/D16/D32 widths
• System controller role; four-level requester, seven-level interrupter, seven-level interrupt handler
**I/O & Expansion:**
• Serial: Two ports (EIA-232-D/EIA-530) or four EIA-232-D at 38.4 kbps max (async/sync)
• IndustryPack: Two 16-bit or one 32-bit with individual DMA channels
• Optional Ethernet transceiver interface with DMA
• Optional SCSI bus interface with 32-bit local bus burst DMA
• Six 32-bit timers (four without VMEbus) plus watchdog timer
• Time-of-day clock with battery backup
• Remote reset, abort, and status control functions
## Key Features
• Double-high VME form factor: 233.4 mm H × 160.0 mm D × 19.8 mm W
• On-board debugger and diagnostic firmware
• Parity or ECC memory protection
• Expandable to 64MB DRAM
• Battery-backed SRAM, NVRAM, and clock
## Typical Applications
Real-time embedded control systems; industrial automation and data logging; VMEbus system controller implementations; distributed I/O and timing-critical instrumentation.
## Compatibility & Integration
Supports MC68LC040 and MC68040 processor families. VMEbus-compliant architecture integrates with standard VME enclosures and peripheral modules. IndustryPack-compatible for plug-in mezzanine expansion.
