Signal disconnection monitor apparatus and signal period detection apparatus therefor
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United States of America Patent
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Oct 22, 1996
Grant Date -
N/A
app pub date -
Jul 28, 1995
filing date -
Jul 29, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A signal disconnection detection apparatus includes a first counter, a first comparator, and a detector. The first counter is reset by a pulse signal received every predetermined period of a clock signal, and counts a clock signal transmitted together with data. The first comparator compares a count value of the first counter with a set value larger than the number of clock signals included in one period of the pulse signal, and stops an operation of the first counter when the count value of the first counter exceeds the set value. The detector detects that the count value of the first counter does not continuously change within a predetermined period of time to output a signal disconnection detection signal of at least one of the clock signal and the pulse signal.
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