Browse Prior Art Database

Configurable Burst Length DRAM Controller

IP.com Disclosure Number: IPCOM000009389D
Publication Date: 2002-Aug-20
Document File: 2 page(s) / 70K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that supports DDR memory with different burst lengths, and allows systems that require different burst length settings to use the same MCH. Benefits include flexible settings and optimized performance.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Configurable Burst Length DRAM Controller

Disclosed is a method that supports DDR memory with different burst lengths, and allows systems that require different burst length settings to use the same MCH. Benefits include flexible settings and optimized performance.

Background

Currently, MCHs are set to only support a fixed burst length; however, an application can be optimized by varying the number and duration of memory accesses to DRAM. For example, some applications (such as graphic programs) require accesses with long durations, while other applications require accesses with short durations. DRAMs can be programmed to have varying burst lengths.

General Description

The disclosed method  increases flexibility by programming the DRAMs to burst lengths of

4 or 8. In addition, the GMCH can be programmed to different burst lengths via a configuration register. The internal state machines take into account the programmed burst length, and generate the appropriate command spacing safe indicators so that no DRAM specification is violated

(see Figure 1).

Advantages

Some implementations of the disclosed structure and method provide one or more of the following advantages:

The disclosed method enables programmable burst lengths, giving additional flexibility and optimized performance to a variety of applications running on the system.

Fig. 1

Disclosed anonymously