Method and apparatus for operating a transceiver in different data rates
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United States of America Patent
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Aug 8, 2006
Grant Date -
N/A
app pub date -
Mar 1, 2002
filing date -
Mar 1, 2002
priority date (Note) -
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Abstract
A transceiver can be used to send and receive data at a lower data rate than the data rate its SERDES is designed to operate. It contains a transmitter interface that receives a first set of data at a lower data rate and delivers a second set of data to the SERDES at a higher data rate. The transceiver also contains a receiver interface that receives a third set of data from the SERDES at the higher data rate and delivers a fourth set of data at the lower data rate. To reduce the minimum transmission serial data rate, one embodiment of the present invention derives a half-speed clock for the transmitter interface. Using the half-speed clock, the transmitter interface supplies data to be transmitted at half the normal rate with respect to a reference clock. As a result, the data rate is reduced. The opposite operation is used for the receiver interface.
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