Detection method of bus termination
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United States of America Patent
Stats
-
Aug 17, 1999
Grant Date -
N/A
app pub date -
Oct 31, 1996
filing date -
Oct 31, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system for detecting whether a bus used to connect units in an in-flight entertainment system is properly terminated. A detection circuit generates a bus termination signal when a terminating cap properly terminates the bus. Prior to installation of the terminating cap, a bus coupling contact of the detection circuit is maintained in a logic high or asserted state. A detection loop in the terminating cap grounds or deasserts the bus coupling contact when the terminating cap is properly installed. A microcontroller determines whether the bus coupling contact is grounded and signals a managing unit of the condition. The managing unit may display an appropriate error message to notify service personnel of the improper termination.
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