System and method for keeping time
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United States of America Patent
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Jun 19, 2001
Grant Date -
N/A
app pub date -
Jan 28, 1997
filing date -
Jun 17, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A low power timekeeping system utilizes a state machine to first read seconds stored in a RAM and update seconds and then determine if the minutes requires updating. If the minutes do not require updating then the sequencer stops operation until the next update cycle. Similarly, the minutes, hours, days of the week, date of the month, month, and year are updated only as needed in each update cycle thereby lowering the power requirement needed by the timekeeping system.
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