Description
Motorola MEM162-502
Technical Specifications
- Memory Capacity: Configured for specific MVME162 memory expansion requirements.
- Memory Type: Dynamic RAM (DRAM).
- Protection: Hardware parity generation and checking.
- Interface: Direct connection to the MVME162 local memory bus.
Functional Features
- Scalability: Allows system integrators to scale MVME162 memory capacity based on application needs.
- Data Integrity: Parity protection ensures reliable operation in noisy industrial environments.
- Transparent Mapping: Memory is automatically mapped into the system address space by the VMEchip2/MCchip.
Application Scenarios
Used in aerospace test benches, medical imaging controllers, and telecommunications switching systems.
Performance Parameters
- Refresh: Relies on the MVME162’s onboard refresh circuitry to maintain data integrity.
- Access Cycles: Software must ensure a minimum of 10 initialization cycles are performed to each bank of RAM.
Material Composition
High-Tg FR4 PCB with industrial-grade DRAM components and gold-plated connector pins.
Structural Characteristics
Mezzanine-style expansion board that attaches directly to the MVME162 baseboard.
Working Principle
Upon system reset, the local bus disables the onboard DRAM. The memory map decoder must be programmed by software before the MEM162-502 can be accessed and utilized by the processor.
Installation Requirements
Ensure proper alignment of the mezzanine connectors. Secure the module firmly to prevent vibration-induced disconnection.
Usage Precautions
Never insert or remove the module while the system is powered. Always verify the memory map configuration in the programmer’s reference guide.
