Importance

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Abstract

An interface functional block includes first and second data I/O circuits arranged sequentially along a first axis, a strobe signal I/O circuit disposed at a left side of the first axis from the first data I/O circuit, a clock generator circuit disposed at a right side of the first axis from the second data I/O circuit, first and second type routing cells arranged sequentially along a second axis perpendicular to the first axis at a first axis coordinate of the strobe signal I/O circuit, third and fourth type cells arranged sequentially along the second axis at a first axis coordinate of the first and second data I/O circuits, and further third and fourth type routing cells sequentially arranged. A clock generated by the clock generator circuit is transferred in a left direction of the first axis toward the first and second data I/O circuits and the strobe signal I/O circuit.

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First Claim