Current-based contention detection and handling system
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United States of America Patent
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Aug 24, 1999
Issued Date -
N/A
app pub date -
Apr 10, 1997
filing date -
Nov 26, 1996
priority date (Note) -
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Abstract
A current-based contention detection and handling system, upon detection of excessive current being applied to a communicating subsystem, avoids potential system damage by preventing continued excessive current. In a preferred embodiment, a current sensor and a subsystem control unit are provided in each communicating subsystem. The subsystem control unit preferably includes a latch and control logic. A system coordinator is further preferably provided for directing recovery. Upon current sensor detection of excessive current to a subsystem bus driver, the subsystem control unit disables the bus driver and asserts an interrupt and fault line to alert the system coordinator. The system coordinator confirms the alert and, upon confirmation, a preferably resets both the subsystem and the subsystem control unit. The subsystem control unit preferably includes a latch and control logic.
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