Motorola MVME5100, Single Board Computer Overview, Features, Table D-1. RAM500 Feature Summary

DRAM500 Memory Expansion Module

D

Overview

The RAM500 memory expansion module can be used on the MVME5100 as an option for additional memory capability. Each expansion module is a single bank of SDRAM with up to 256MB of available ECC memory.

Currently, two expansion modules can be used in tandum to produce an additional expanded memory capability of 512MB. There are two configurations of the board to accommodate tandum usage. The bottom expansion module has both a bottom and top connector: one to plug into the base board, and one to mate with the second RAM500 module. The top expansion module is designed with just a bottom connector to plug into the lower RAM500 module. The RAM500 incorporates a Serial ROM for system memory Serial Presence Detect (SPD) data.

A maximum of two expansion modules are allowed: one bottom and one top. If only one module is used, the RAM500 module with the top configuration is recommended.

Features

The following table lists the features of the RAM500 memory expansion module:

	Table D-1. RAM500 Feature Summary
Form Factor	Dual sided mezzanine, with screw/post attachment to host board
SROM	Single 256x8 I2C SROM for Serial Presence Detect Data
SDRAM	Double-Bit-Error detect, Single-Bit-Error correct across 72 bits
	64MB or 256MB mezzanine memory @ 100MHz as a goal
Memory Expansion	Any RAM500 memory size can be attached to the host board followed
Flexibility	by any secondary RAM500 memory size for maximum memory
	expansion flexibility.

D-1