Double data rate synchronous SRAM with 100% bus utilization

Electrical computers and digital processing systems: memory – Storage accessing and control – Access timing

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07069406

ABSTRACT:
A synchronous memory circuit is capable of double data transfer rate per clock cycle, 100% bus utilization (i.e., no idle clock cycles in bus turn arounds), and has only one clock cycle of latency in each of read and write burst operations. The memory circuit has a data bus202, at least two memory blocks (20, 30), a multiplexer (120) for receiving two read data items from respective two memory blocks in a read burst operation and allowing one of the two read data items to be provided on the data bus half a clock cycle after the read burst operation is initiated and allowing the other one of the two read data items to be provided on the data bus one clock cycle after the read burst operation is initiated, and two registers (50, 70) for storing respective two write data items provided on the data bus in a first write burst operation wherein one of the two write data items is written to one of the two memory blocks at the initiation of a next write burst operation following the first write burst operation and the other one of the two write data items is written to the other one of the two memory blocks half a clock cycle after the initiation of the next write burst operation, wherein in two consecutive clock cycles the two write data items are capable of being transferred to the memory circuit via the data bus and the two read data items are capable of being transferred from the memory circuit via the data bus.

REFERENCES:
patent: 3967247 (1976-06-01), Andersen et al.
patent: 4096402 (1978-06-01), Schroeder et al.
patent: 4208716 (1980-06-01), Porter et al.
patent: 4225922 (1980-09-01), Porter
patent: 4371929 (1983-02-01), Brann et al.
patent: 4394732 (1983-07-01), Swenson
patent: 4394733 (1983-07-01), Swenson
patent: 4404474 (1983-09-01), Dingwall
patent: 4410942 (1983-10-01), Milligan et al.
patent: 4415970 (1983-11-01), Swenson et al.
patent: 4423479 (1983-12-01), Hanson et al.
patent: 4426681 (1984-01-01), Bacot et al.
patent: 4433374 (1984-02-01), Hanson et al.
patent: 4437155 (1984-03-01), Sawyer et al.
patent: 4442488 (1984-04-01), Hall
patent: 4476526 (1984-10-01), Dodd
patent: 4490782 (1984-12-01), Dixon et al.
patent: 4523275 (1985-06-01), Swenson et al.
patent: 4530054 (1985-07-01), Hamstra et al.
patent: 4530055 (1985-07-01), Hamstra et al.
patent: 4547848 (1985-10-01), Nishida et al.
patent: 4611337 (1986-09-01), Evans
patent: 4638187 (1987-01-01), Boler et al.
patent: 4695943 (1987-09-01), Keeley et al.
patent: 4755930 (1988-07-01), Wilson, Jr. et al.
patent: 4789796 (1988-12-01), Foss
patent: 4794521 (1988-12-01), Ziegler et al.
patent: 4796231 (1989-01-01), Pinkham
patent: 4817058 (1989-03-01), Pinkham
patent: 4882709 (1989-11-01), Wyland
patent: 4884270 (1989-11-01), Chiu et al.
patent: 4912630 (1990-03-01), Cochcroft, Jr.
patent: 4916604 (1990-04-01), Yamamoto et al.
patent: 4928281 (1990-05-01), Kurosawa et al.
patent: 4942550 (1990-07-01), Murray
patent: 4958088 (1990-09-01), Farah-Bakhsh et al.
patent: 4984204 (1991-01-01), Sato et al.
patent: 5022011 (1991-06-01), Allan
patent: 5043937 (1991-08-01), Glaise
patent: 5050072 (1991-09-01), Earnshaw et al.
patent: 5111435 (1992-05-01), Miyamoto
patent: 5122690 (1992-06-01), Bianchi
patent: 5128560 (1992-07-01), Chern et al.
patent: 5128563 (1992-07-01), Hush et al.
patent: 5134311 (1992-07-01), Biber et al.
patent: 5150186 (1992-09-01), Pinney et al.
patent: 5165046 (1992-11-01), Hesson
patent: 5170074 (1992-12-01), Aoki
patent: 5179298 (1993-01-01), Hirano et al.
patent: 5194765 (1993-03-01), Dunlop et al.
patent: 5195056 (1993-03-01), Pinkham et al.
patent: 5220208 (1993-06-01), Schenck
patent: 5239206 (1993-08-01), Yanai
patent: 5251181 (1993-10-01), Toda
patent: 5254883 (1993-10-01), Horowitz et al.
patent: 5274276 (1993-12-01), Casper et al.
patent: 5276642 (1994-01-01), Lee
patent: 5278460 (1994-01-01), Casper
patent: 5281865 (1994-01-01), Yamashita et al.
patent: 5311481 (1994-05-01), Casper et al.
patent: 5319606 (1994-06-01), Bowen et al.
patent: 5321368 (1994-06-01), Hoelzle
patent: 5321651 (1994-06-01), Monk
patent: 5341341 (1994-08-01), Fukuzo
patent: 5347177 (1994-09-01), Lipp
patent: 5347179 (1994-09-01), Casper et al.
patent: 5349566 (1994-09-01), Merritt et al.
patent: 5361002 (1994-11-01), Casper
patent: 5377338 (1994-12-01), Olson et al.
patent: 5383157 (1995-01-01), Phelan
patent: 5384737 (1995-01-01), Childs et al.
patent: 5384745 (1995-01-01), Konishi et al.
patent: 5387809 (1995-02-01), Yamagishi et al.
patent: 5390308 (1995-02-01), Ware et al.
patent: 5394555 (1995-02-01), Hunter et al.
patent: 5400283 (1995-03-01), Raad
patent: 5438545 (1995-08-01), Sim
patent: 5440260 (1995-08-01), Hayashi et al.
patent: 5457407 (1995-10-01), Shu et al.
patent: 5467473 (1995-11-01), Kahle et al.
patent: 5471591 (1995-11-01), Edmondson et al.
patent: 5473575 (1995-12-01), Farmwald et al.
patent: 5475642 (1995-12-01), Taylor
patent: 5483497 (1996-01-01), Mochizuki et al.
patent: 5487035 (1996-01-01), Nishimura et al.
patent: 5488712 (1996-01-01), Kiuchi
patent: 5497127 (1996-03-01), Sauer
patent: 5498990 (1996-03-01), Leung et al.
patent: 5502676 (1996-03-01), Pelley, III et al.
patent: 5506814 (1996-04-01), Hush et al.
patent: 5508638 (1996-04-01), Cowles et al.
patent: 5513327 (1996-04-01), Farmwald et al.
patent: 5515325 (1996-05-01), Wada
patent: 5526320 (1996-06-01), Zagar et al.
patent: 5546344 (1996-08-01), Fawcett
patent: 5561781 (1996-10-01), Braceras et al.
patent: 5568077 (1996-10-01), Sato et al.
patent: 5568430 (1996-10-01), Ting
patent: 5572467 (1996-11-01), Ghassemi et al.
patent: 5574698 (1996-11-01), Raad
patent: 5576645 (1996-11-01), Farwell
patent: 5577236 (1996-11-01), Johnson et al.
patent: 5578941 (1996-11-01), Sher et al.
patent: 5581197 (1996-12-01), Motley et al.
patent: 5581718 (1996-12-01), Grochowski
patent: 5581734 (1996-12-01), DiBrino et al.
patent: 5587961 (1996-12-01), Wright et al.
patent: 5590073 (1996-12-01), Arakawa et al.
patent: 5594700 (1997-01-01), Ward et al.
patent: 5617362 (1997-04-01), Mori et al.
patent: 5619453 (1997-04-01), Roohparvar et al.
patent: 5619473 (1997-04-01), Hotta
patent: 5621690 (1997-04-01), Jungroth et al.
patent: 5627780 (1997-05-01), Malhi
patent: 5627791 (1997-05-01), Wright et al.
patent: 5631872 (1997-05-01), Naritake et al.
patent: 5636163 (1997-06-01), Furutani et al.
patent: 5636173 (1997-06-01), Schaefer
patent: 5636174 (1997-06-01), Rao
patent: 5638335 (1997-06-01), Akiyama et al.
patent: 5644729 (1997-07-01), Amini et al.
patent: 5650971 (1997-07-01), Longway et al.
patent: 5652724 (1997-07-01), Manning
patent: 5655105 (1997-08-01), McLaury
patent: 5659696 (1997-08-01), Amini et al.
patent: 5663901 (1997-09-01), Wallace et al.
patent: 5668763 (1997-09-01), Fujioka et al.
patent: 5675549 (1997-10-01), Ong et al.
patent: 5694065 (1997-12-01), Hamasaki et al.
patent: 5699317 (1997-12-01), Sartore et al.
patent: 5717904 (1998-02-01), Ehlers et al.
patent: 5737276 (1998-04-01), Shin et al.
patent: 5748558 (1998-05-01), Suzuki
patent: 5749086 (1998-05-01), Ryan
patent: 5754815 (1998-05-01), Ernst et al.
patent: 5757704 (1998-05-01), Hachiya
patent: 5761147 (1998-06-01), Lindner et al.
patent: 5761150 (1998-06-01), Yukutake et al.
patent: 5777942 (1998-07-01), Dosaka et al.
patent: 5781480 (1998-07-01), Nogle et al.
patent: 5781481 (1998-07-01), Iwakiri
patent: 5790838 (1998-08-01), Irish et al.
patent: 5793688 (1998-08-01), McLaury
patent: RE35934 (1998-10-01), Takai
patent: 5819060 (1998-10-01), Cesana
patent: 5825711 (1998-10-01), Manning
patent: 5828606 (1998-10-01), Mick
patent: 5831929 (1998-11-01), Manning
patent: 5838631 (1998-11-01), Mick
patent: 5841732 (1998-11-01), Mick
patent: 5847577 (1998-12-01), Trimberger
patent: 5854911 (1998-12-01), Watkins
patent: 5870347 (1999-02-01), Keeth et al.
patent: 5875151 (1999-02-01), Mick
patent: 5875152 (1999-02-01), Liu et al.
patent: 5890195 (1999-03-01), Rao
patent: 5915105 (1999-06-01), Farmwald et al.
patent: 5917772 (1999-06-01), Pawlowski
patent: 5933385 (1999-08-01), Jiang et al.
patent: 5978311 (1999-11-01), Wilford et al.
patent: 5987570 (1999-11-01), Hayes et al.
patent: 6044429 (

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Double data rate synchronous SRAM with 100% bus utilization does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Double data rate synchronous SRAM with 100% bus utilization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double data rate synchronous SRAM with 100% bus utilization will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3656549

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.