Single wire communication system
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United States of America Patent
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-
Jan 26, 1999
Issued Date -
N/A
app pub date -
May 28, 1996
filing date -
May 15, 1989
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A communication circuit is provided in which reads from a device are controlled by sensing a transition by a host communicating with a device. The device then accepts a one which holds the line high for a predetermined time period or accepts a zero when the line is held high for a different time period. The sending of data is accomplished in a symmetrical relationship by having the device after the host pulls the line high by either by allowing the line to remain high or forcing the line to ground within the requisite time periods. This allows the 'slave' device to consume almost no power in either the read or the write modes.
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