Description
Motorola MVME177-004
Technical Specifications
- Processor: MC68060 with advanced floating-point and cache capabilities.
- Memory: Up to 256 MB of ECC-protected DRAM for massive data buffering.
- Non-Volatile Storage: 8KB battery-backed SRAM preserves critical system configurations and time-of-day data.
Functional Features
- Versatile Boot Modes: Supports an all-Flash mode via the FLASHJP (J8) jumper, or mixed EPROM/Flash modes controlled by VMEchip2 GPIO2.
- High-Speed DMA: Dedicated DMA engines for the SCSI bus and VMEbus significantly reduce CPU intervention during data transfers.
- Real-Time Clock: Battery-backed RTC ensures accurate timekeeping across power cycles.
Application Scenarios
Power grid monitoring, railway signaling control, large-scale Distributed Control Systems (DCS), and aerospace simulation platforms.
Performance Parameters
- Storage Environment: Rated for -40°C to +85°C storage temperature and 5% to 90% relative humidity (noncondensing).
- Power Requirements: +5Vdc (±5%) at 1.75A typical/2.0A max; +12Vdc (±5%) at 1A max; -12Vdc (±5%) at 100mA typical.
- Memory Access: 32-bit wide Flash supports 8-bit, 16-bit, and 32-bit access modes.
Material Composition
Industrial-grade components with a conformal coating option to protect against moisture, salt spray, and dust ingress.
Structural Characteristics
Double-high VME dimensions. The front panel provides a secure mechanical connection to the chassis rails, forming a complete EMI shield and ground path.
Working Principle
Following a local bus reset, the hardware maps the boot device to address $00000000. The MC68060 initializes the system, configures the VMEchip2, and transitions control to the operating system.
Installation Requirements
Must be housed in an FCC Class A compliant shielded chassis. All external I/O cable shields must be grounded through the metal connector shells.
Usage Precautions
Never operate the system without proper chassis grounding to prevent RF emission violations. Periodically verify the voltage of the SRAM backup battery to prevent data loss.
