Description
Motorola MVME257C
Technical Specifications
- Microprocessor: PowerPC 603e.
- Clock Speed: 200 MHz or 233 MHz.
- Memory: 64 MB DRAM with ECC error checking.
- Storage: 4 MB Flash memory.
Functional Features
- Enhanced Memory Protection: ECC memory support prevents data corruption from single-bit errors.
- Flexible Expansion: Includes a 64-bit PMC (PCI Mezzanine Card) slot for custom I/O or communication modules.
- Multi-Protocol Support: Supports TCP/IP, UDP, and various industrial serial protocols.
- Robust I/O Integration: Combines Ethernet, serial, and SCSI on a single footprint.
Application Scenarios
Ideal for distributed control systems (DCS), flight simulation, radar/sonar signal processing, and semiconductor manufacturing equipment.
Performance Parameters
- VME Transfer: Supports A24/A32 addressing and D8/D16/D32/D64 block transfer modes.
- Interrupt Handling: Software-managed interrupts via PCI-to-VME bridge controllers.
- Network: 10Base-T/100Base-TX Ethernet with DMA acceleration.
Material Composition
High-quality FR4 industrial PCB substrate equipped with solid capacitors, high-frequency decoupling, and gold-plated VME connector pins for superior signal integrity.
Structural Characteristics
Standard Eurocard VME dimensions. The front panel features six status LEDs (CHS, BFL, CPU, FUS, SYS, PCI) and a seven-segment debug display register.
Working Principle
The processor accesses local ECC memory via a high-speed internal bus. PCI local bus DMA facilitates rapid data transfers between local memory and the VME bus. The onboard firmware monitor provides powerful evaluation and debugging tools.
Installation Requirements
Ensure the VME chassis is properly grounded to prevent static buildup and EMI. Use dedicated transition modules for external serial or SCSI connections.
Usage Precautions
Monitor the FUS LED; if it flashes or turns off, check the onboard polyswitch. Do not modify hardware jumpers without consulting the technical manual. Avoid unshielded operation in high-EMI zones.
