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Hisashi IWAMOTO Naoya WATANABE Akira YAMAZAKI Seiji SAWADA Yasumitsu MURAI Yasuhiro KONISHI Hiroshi ITOH Masaki KUMANOYA
A multiple-registered architecture is described for 180 MHz 16 Mbit synchronous DRAM. The proposed architecture realizes a flexible control of critical timings such as I/O line busy time and achieves an operation at 180 MHz clock rate with area penalty of only 5.4% over the conventional DRAM.