Terminating transmission lines using on-chip terminator circuitry
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United States of America Patent
Stats
-
May 15, 2001
Grant Date -
N/A
app pub date -
May 21, 1999
filing date -
Jun 25, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An information handling system is disclosed herein. The system includes at least one system transmission line having a characteristic impedance and a plurality of clusters, each cluster being coupled to each other cluster through at least one of the system transmission lines. Each cluster comprises at least one cluster transmission line each having a characteristic impedance equal to the characteristic impedance of the system transmission lines, and is coupled to a the system transmission line and a circuit chosen from the following: a driver, an on-chip terminator, an off-chip terminator; each driver having a pull-up circuit having an output resistance matching the characteristic impedance of the cluster transmission lines. A method for operating the system provided herein includes designating one of the drivers as an active driver, designating each driver other than the active driver as a terminating driver, causing each terminating driver to be configured in a nonactive pull-up terminating configuration; and causing the active driver to drive a signal onto the transmission line to which the active driver is connected.
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