Method and apparatus for communication for a data-storing token
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United States of America Patent
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-
May 22, 1990
Grant Date -
N/A
app pub date -
Aug 19, 1988
filing date -
Oct 20, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A data-storing token includes a microprocessor which responds to a signal generated by a token interrogator for altering its clock frequency so as to achieve synchronization between the token and interrogator operations. Additional synchronization is achieved by adjusting the length of delay loops in routines used for communication between the token and the interrogator.
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