DEVICE FOR CALCULATING ROUND-TRIP TIME OF MEMORY TEST USING PROGRAMMABLE LOGIC
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United States of America Patent
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Feb 5, 2015
app pub date -
Jul 30, 2014
filing date -
Jul 31, 2013
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Abstract
A device for calculating round-trip time of a memory test using a programmable logic includes a pattern generation part including two pairs of input/output (IO) pins to generate a pattern signal for testing, and receiving a feedback signal through bidirectional buses from IO lines; two pairs of bidirectional buses for relaying a signal between the pattern generation part and a programmable logic part; and a programmable logic part for transmitting the pattern signal to the IO lines through the bidirectional buses and transmitting the feedback signal to the bidirectional buses from the IO lines, and including a multiplexer for crossing a signal connection direction upon calculation of the feedback signal, wherein the pattern generation part measures an input time of the feedback signal based on an output time of the pattern signal, thus calculating the round-trip time of the signal.
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