Memory access system including a memory controller with memory redrive circuitry

US5479640A · kind A · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Frank P. Cartman · Poughquag, US
• Brian W. Curran · Saugerties, US
• Matthew A. Krygowski · Wappingers Falls, US
• Tin-Chee Lo · Fishkill, US
• Sandy N. Luu · Wappingers Falls, US
• Sanjay Patel · Cary, US
• William Wu Shen · 東區, TW

Key dates

• Filing date: Jun 30, 1993
• Grant date: Dec 26, 1995
• Expiry date: Jun 30, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G11C11/408
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A memory access system for improving memory access when addressing dynamic random access modules (DRAMs). The memory access system includes a main memory and a memory controller. To improve memory access, both the memory controller and the main memory hardware remember the row address of the last access. Macro operation commands for fetch and store contain the last row address. The main memory hardware redrives that row address to the DRAMs after completion of an access, so that the memory controller need not provide a row address to the memory for each command of a command sequence.