Method and system to facilitate configurable input/output (i/o) termination voltage reference

a technology of input/output and voltage reference, which is applied in the field of terminal circuits, can solve the problems that the northbridge does not allow the interoperability of the southbridge and the north bridg

Active Publication Date: 2010-12-30
TAHOE RES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004]The features and advantages of embodiments of the invention will become apparent from the following detailed description of the subject matter in which:

Problems solved by technology

As such, the fixed termination voltage reference of the Southbridge and Northbridge does not allow the interoperability of the Southbridge and North bridge.

Method used

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  • Method and system to facilitate configurable input/output (i/o) termination voltage reference
  • Method and system to facilitate configurable input/output (i/o) termination voltage reference
  • Method and system to facilitate configurable input/output (i/o) termination voltage reference

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Embodiment Construction

[0008]Embodiments of the invention described herein are illustrated by way of example and not by way of limitation in the accompanying figures. For simplicity and clarity of illustration, elements illustrated in the figures are not necessarily drawn to scale. For example, the dimensions of some elements may be exaggerated relative to other elements for clarity. Further, where considered appropriate, reference numerals have been repeated among the figures to indicate corresponding or analogous elements. Reference in the specification to “one embodiment” or “an embodiment” of the invention means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase “in one embodiment” in various places throughout the specification are not necessarily all referring to the same embodiment.

[0009]Embodiments of the invention provide a method and system to facilitate co...

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Abstract

A method and system to facilitate configurable input / output (I / O) termination voltage reference in a transmitter or receiver. In one embodiment of the invention, the transmitter and receiver, each has a termination circuit to select a suitable termination reference voltage based on the desired coupling type. In one embodiment of the invention, the transmitter has a termination circuit coupled with a transmission driver and the transmitter selects only one of a supply voltage, a ground voltage and a half supply voltage as a termination voltage reference of the transmission driver. The receiver has a termination circuit to select either a supply voltage or a ground voltage as a termination voltage reference of the receiver.

Description

FIELD OF THE INVENTION[0001]This invention relates to a termination circuit, and more specifically, but not exclusively, to a configurable input / output (I / O) termination voltage reference.BACKGROUND DESCRIPTION[0002]A typical computer system has several major components that include the processor, the memory controller hub, commonly known as the “Northbridge”, the I / O controller hub, commonly known as the “Southbridge”, memory modules, and a mass storage device.[0003]The termination voltage reference of the interface between the Southbridge and the Northbridge is usually fixed. For example, when direct current (DC) coupling between a Southbridge and a Northbridge is to be used, a power supply terminated Southbridge can only connect to a power supply terminated Northbridge. The power supply terminated Southbridge cannot be connected to a ground voltage terminated Northbridge. As such, the fixed termination voltage reference of the Southbridge and Northbridge does not allow the intero...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G11C5/14
CPCH04L25/028G06F13/4072
InventorSWARTZ, RONALD W.TSIRKIN, VLADISLAVLIVNE, RAM
OwnerTAHOE RES LTD