Counter device and counting method
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United States of America Patent
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Jun 23, 2009
Grant Date -
Jun 22, 2006
app pub date -
Nov 30, 2005
filing date -
Dec 3, 2004
priority date (Note) -
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Abstract
A counter device includes: a rewritable counter having a non-volatile memory which requires sector erasure to once turn all data in a sector into high data, prior to changing low data into high data in respective bits; and a control section updating a counter value of the rewritable count by writing in and reading out the data with respect to the rewritable counter using a complement of 1, and thereby controlling writing in and reading out the data of the rewritable counter.
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