Microcomputer control system in which programs can be modified and newer versions of the modified programs being detected and executed
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United States of America Patent
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Feb 6, 2007
Grant Date -
Feb 13, 2003
app pub date -
Oct 11, 2002
filing date -
Nov 29, 1996
priority date (Note) -
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Abstract
Programs or data in a mask ROM incorporated in a one-chip microcomputer can be modified from the outside. With version information appended to each of a mask ROM 2 incorporated in a one-chip microcomputer 6 and an external EPROM 5, by comparing the version numbers, programs (tasks and subroutines) of a new version can always be executed and update data of a new version can be used. The programs can be customized for each user.
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