Data transfer between clock domains
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United States of America Patent
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Dec 6, 2016
Grant Date -
May 21, 2015
app pub date -
Jun 20, 2013
filing date -
Jun 27, 2012
priority date (Note) -
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Abstract
An arrangement for transferring a data signal from a first clock domain (bus_slow) to a second clock domain (bus_fast) in a digital system. The first clock domain (bus_slow) has a first clock (ck slow) with a frequency less than a frequency of a second clock (ck fast) in the second clock domain (bus_fast). The arrangement is configured to transfer the data signal from the first clock domain (bus_slow) to the second clock domain (bus_fast), detect whether a predetermined transition occurs in the first clock (ck slow) within a predetermined period of time, using detecting means (2) clocked by the second clock (ck fast), and transfer the data signal from the first clock domain (bus_slow) to the second clock domain (bus_fast) again if the detecting means (2) detects the predetermined transition in the first clock (ck slow) within the predetermined period of time.
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