Semiconductor integrated circuit having a plurality of circuit blocks respectively supplied with power from different power sources
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United States of America Patent
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-
Sep 4, 1990
Grant Date -
N/A
app pub date -
Jul 1, 1988
filing date -
Jul 2, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A semiconductor integrated circuit has a logic circuit block, a RAM memory block having an input stage of logical gates and energized independently from the logic circuit block, and a detection circuit for detecting a deenergization of the logic circuit block. The logical gates in the input stage are controlled to produce fixed output signals having a logical high or low level.
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