The Emerson/Motorola MVME162-220 is a single-height 6U VME embedded controller built on a 25 MHz Motorola MC68040 32-bit processor with integrated 8KB cache, MMU, and FPU. Standard configurations ship with 4MB parity-protected DRAM, expandable to 16MB, plus 512KB battery-backed SRAM and 1MB Flash memory. The board integrates VMEchip2 ASIC for A32/D64 VMEbus master/slave control, a PCC2 parallel interface controller, and an 85230 serial I/O controller supporting four EIA-232-D ports at 38.4 kbps maximum. Optional Intel 82596CA Ethernet and NCR53C710 SCSI controllers enable network and storage connectivity. Six 32-bit programmable timers (1 μs resolution) and four IndustryPack interfaces support real-time I/O expansion. The board measures 233.4 mm (H) × 160.0 mm (D) and accepts both MC68040 and MC68LC040 processor variants. MK48T08 NVRAM with integrated time-of-day clock and battery backup provide nonvolatile storage and timekeeping across power cycles. Worst-case SRAM battery backup duration reaches 200 days.
## Technical Specifications
**Processor**
• CPU: Motorola MC68040 or MC68LC040 (25 MHz, 32-bit)
• Cache: 8KB (instruction and data)
• Integrated MMU and FPU (MC68040); FPU omitted on MC68LC040
**Memory**
• DRAM: 4MB standard, parity-protected; expandable to 16MB
• SRAM: 512KB battery-backed (200-day backup duration)
• Flash: 1MB (Intel 28F008SA or quad Intel 28F020s)
• NVRAM/TOD: MK48T08 8KB with battery backup
**Chipset & Controllers**
• VMEbus: VMEchip2 ASIC (A32/D64, master/slave, system controller)
• Parallel: PCC2 8-bit bidirectional controller
• Serial: 85230 (four EIA-232-D DTE ports, 38.4 kbps max)
• Optional: Intel 82596CA Ethernet, NCR53C710 narrow SE SCSI
**Interfaces & I/O**
• VMEbus (P1), I/O (P2), four IndustryPack single/double-wide slots
• SCSI: 68-pin (optional), Ethernet: DB-15 (optional)
• Timers: Six 32-bit programmable (1 μs resolution), integrated watchdog
**Physical**
• Form: Single-height 6U VME, 233.4 mm (H) × 160.0 mm (D) × 19.8 mm (W)
## Key Features
• Dual processor options support floating-point or cache-only configurations
• Battery-backed nonvolatile memory with 200-day retention
• Four independent serial channels for multi-device control
• Modular expansion via four IndustryPack interfaces
• Optional high-speed Ethernet and SCSI connectivity
## Typical Applications
• Real-time process control and industrial automation
• Data acquisition systems with instrument integration
• Networked VME backplane controllers
• Embedded systems requiring serial device management
## Compatibility & Integration
The MVME162-220 operates as a VMEbus master/slave within 6U Eurocard systems. Support for MC68LC040 variants accommodates applications not requiring floating-point computation. Flash and NVRAM configurations suit both monitor/debugger and user-firmware deployments.
