Curtiss-Wright / VMETRO / Micro Memory MM-6490 Series High Speed, Dual-Port VME / VME64 / RACEway Buffer Memory
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Curtiss-Wright / VMETRO / Micro Memory MM-6490 Series High Speed, Dual-Port VME / VME64 / RACEway Buffer Memory

Features

  • 128MB, 256MB, 512MB, 1GB and 2GB Capacity
  • 32-bits for VMEbus and RACEway
  • 8, 16, 32, 64 bits (UAT) for VMEbus
  • 32-bit Multiplexed for RACEway

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This Curtiss-Wright / VMETRO / Micro Memory MM-6490R High Speed, Dual-Port 256MB VME / VME64 / RACEway Buffer Memory is used and in excellent condition.

Configuration:
• RAM: 256 MB





This Curtiss-Wright / VMETRO / Micro Memory MM-6490R High Speed, Dual-Port 512MB VME / VME64 / RACEway Buffer Memory is used and in excellent condition.

Configuration:
• RAM: 512 MB





This Curtiss-Wright / VMETRO / Micro Memory MM-6490DR High Speed, Dual-Port 2GB VME / VME64 / RACEway Buffer Memory is used and in excellent condition.

Configuration:
• RAM: 2 GB





This Curtiss-Wright / VMETRO / Micro Memory MM-6490DR High Speed, Dual-Port 2GB VME / VME64 / RACEway Buffer Memory is new from surplus stock. This unit ships in the manufacturer's box.

Configuration:
• RAM: 2 GB





This Curtiss-Wright / VMETRO / Micro Memory MM-6490D High Speed, Dual-Port 1GB VME / VME64 / RACEway Buffer Memory is used and in excellent condition.

Configuration:
• RAM: 1 GB




  • Description
  • Tech Specs
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Description

The MM-6490 series high-speed, dual-port memory module that provides up to 2GB for VME/VME64/RACEway systems. It is intended for high performance applications employing Burst Mode on RACEway at data rates greater than 160 Mbytes/sec. Block Transfers on the VMEbus with data rates at 80 Mbytes/sec are also supported.

The Control Status Register (CSR), located in the short I/O address space, stores and reads bytewide parity errors detected on the VME/RACEway buses. The other bits enable Write-Wrong parity for diagnostics.

Parity generation and checking are provided for each byte; parity status is stored and transmitted via BERR.

Reliability is ensured by burn-in and running memory diagnostics that check operation for 48 hours while temperature cycling boards from 0-60° Celsius.

Product Family: MM-6490, 6490, MM-6490D, 6490D, MM-6490R, 6490R, MM-6490DR, 6490DR, MM-6490ADR, 6490ADR
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Specifications

Capacity128MB, 256MB, 512MB, 1GB and 2GB
Cycle/Access Time Block Transfer (BLT) - Write:, 100/30, Read: 100/30
Address32-bits for VMEbus and RACEway
Data In/Data Out8, 16, 32, 64 bits (UAT) for VMEbus, 32-bit multiplexed for RACEway
Sequential AccessBlock Transfer (BLT) of 256/2KB, MBLT 2KB, and RACEway 2KB
CSRRead/Write, 8 bits wide, jumper-selectable in VME short I/O space (A16) with VMEbus low limit address tracking
InterfaceVME Rev. D and RACEway REV 1.4
Modes of OperationRead, Write, read-modify-write, and refresh
Memory SelectionTwo independent memory ports, switch-selectable on 1MB boundaries for VME, Card Select for RACEway