US 5,969,841 A · Gigabaud link module with received power detect signal

Abstract

An improved Gigabaud Link Module (GLM) is provided for performing bi-directional data transfers between a host device and a serial transfer medium. The improved GLM, includes data signal transmission circuitry for reading data signals from the host device and transmitting the data signals as serial data over a first serial transfer link. Data signal receiving circuitry is also provided for receiving serial data signals from a second serial transfer link. The receiving circuitry then writes the signals to the host device. The first and second transfer links form the serial transfer medium, and the transmission and receiving circuitry provides the bi-directional data transfer between the host device and the serial transfer medium. The improved GLM further includes signal detection circuitry for determining when data signals are being received over the second serial transfer link.

Claims16

Dependent claims

A Gigabaud Link Module for performing bi-directional data transfers between a host device and a serial transfer medium, said Gigabaud Link Module comprising:

data signal transmission circuitry for reading data signals from said host device and transmitting said data signal as serial data signals over a first serial transfer link;
data signal receiving circuitry for receiving serial data signals from a second serial transfer link, and writing said signals to said host device;
said first and second transfer links forming said serial transfer medium, and said transmission circuitry and said receiving circuitry providing said bi-directional data transfer between said host device and said serial transfer medium;
signal detection circuitry for determining when data signals are being received over said second serial transfer link;
and
control logic for producing an L.sub.-- UNUSE signal for indicating to said host device when said Gigabaud Link Module is operable and said signal detection circuitry has detected an optical signal on said second serial transfer link.

3 more elements

A Gigabaud Link Module providing an L.sub.-- UNTUSE signal to a host device associated with said Gigabaud Link Module, said L.sub.-- UNUSE signal providing indication that the Gigabaud Link Module is under power, ready for operation, is not running a diagnostic test and is receiving a data signal over a receive data link, the Gigabaud Link Module comprising:

signal detection circuitry configured to detect the presence of a data signal on said receive data data link and generate a Signal Detected signal;
and
logic circuitry configured to produce said L.sub.-- UNUSE signal, said Signal Detected signal being an input to the L.sub.-- UNUSE logic circuitry.

Dependencies are inferred from the claim text.

Gigabaud link module with received power detect signal

Life of this patent

Gigabaud link module with received power detect signal

Life of this patent

Abstract

Claims16