Method and apparatus for interfacing with ram
Abstract
An apparatus for connecting a bus to a RAM comprising : a single address generator providing complete addresses that is clocked at a first clock rate;a RAM interface, comprising : a plurality of swing buffers connected to a bus for receiving therefrom a plurality of data words from a source at a second clock rate ;a control coupled to said swing buffersa two-wire link connecting said control with said address generator wherein a request/acknowledge protocol is implemented therebetween via said link, wherein said two-wire link comprises a sender, a receiver, and a clock connected to said sender and said receiver, wherein data is transferred from said sender to said receiver upon a transition of said clock only when said sender is ready and said receiver is ready; wherein the interface is clocked at a third clock rate that is asynchronous with said first clock rate and said second clock rate, and data is transferred between a selected swing buffer and a RAM in response to a first signal that is generated by said control when said control receives an address from the address generator and said control receives a second signal from said selected swing buffer via said communication link

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Projected expiry passed 28 February 2015, 11.6 years ago.
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1 sheet
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Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| EP0321628A1 | Cites | European Patent Office (EPO) | A | Search report | 1,2 |
| EP0468480A2 | Cites | European Patent Office (EPO) | A | Search report | 1,2 |
| EP0576749A1 | Cites | European Patent Office (EPO) | A | Search report | 1,4,5 |
| US4564915A | Cites | United States of America | A | Search report | 1,3 |
296 members in 12 offices
Priority claims23
| Document | Office | Kind | Date |
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| 9405914 | United Kingdom | A | |
| 9405914 | United Kingdom | A | |
| 9405914 | United Kingdom | – | |
| 9415365 | United Kingdom | A | |
| 9415365 | United Kingdom | A | |
| 9415365 | United Kingdom | – | |
| 9415387 | United Kingdom | A | |
| 9415387 | United Kingdom | A | |
| 9415387 | United Kingdom | – | |
| 9415391 | United Kingdom | A | |
| 9415391 | United Kingdom | A | |
| 9415391 | United Kingdom | – | |
| 9415413 | United Kingdom | A | |
| 9415413 | United Kingdom | A | |
| 9415413 | United Kingdom | – | |
| 95301272 | European Patent Office (EPO) | A | |
| 95301272 | European Patent Office (EPO) | A | |
| EP19950301272 | – | – | – |
| GB19940005914 | – | – | – |
| GB19940015365 | – | – | – |
| GB19940015387 | – | – | – |
| GB19940015391 | – | – | – |
| GB19940015413 | – | – | – |
Members296
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| EP0576749A1 | European Patent Office (EPO) | A1 | |
| GB9405914D0 | United Kingdom | D0 | |
| GB9415365D0 | United Kingdom | D0 | |
| GB9415387D0 | United Kingdom | D0 | |
| GB9415391D0 | United Kingdom | D0 | |
| GB9415413D0 | United Kingdom | D0 | |
| GB9416153D0 | United Kingdom | D0 | |
| EP0621691A2 | European Patent Office (EPO) | A2 | |
| JPH06326592A | Japan | A | |
| JPH06348492A | Japan | A | |
| EP0621691A3 | European Patent Office (EPO) | A3 | |
| GB9503964D0 | United Kingdom | D0 | |
| GB9504019D0 | United Kingdom | D0 | |
| GB9504046D0 | United Kingdom | D0 | |
| GB9504047D0 | United Kingdom | D0 | |
| GB9505942D0 | United Kingdom | D0 | |
| GB9511569D0 | United Kingdom | D0 | |
| CA2145156A1 | Canada | A1 | |
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| CA2145158A1 | Canada | A1 | |
| CA2145159A1 | Canada | A1 | |
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| CA2145423A1 | Canada | A1 | |
| CA2145424A1 | Canada | A1 | |
| CA2145425A1 | Canada | A1 | |
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| CA2145427A1 | Canada | A1 | |
| CA2145549A1 | Canada | A1 | |
| CA2244810A1 | Canada | A1 | |
| EP0674266A2 | European Patent Office (EPO) | A2 | |
| EP0674442A2 | European Patent Office (EPO) | A2 | |
| EP0674443A2 | European Patent Office (EPO) | A2 | |
| EP0674446A2 | European Patent Office (EPO) | A2 | |
| GB2287808A | United Kingdom | A | |
| GB2287850A | United Kingdom | A | |
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| KR950033894A | Republic of Korea | A | |
| KR950033895A | Republic of Korea | A | |
| KR950033896A | Republic of Korea | A | |
| CN1114489A | China | A | |
| CA2154962A1 | Canada | A1 | |
| EP0695095A2 | European Patent Office (EPO) | A2 | |
| AU2501995A | Australia | A | |
| KR960006647A | Republic of Korea | A | |
| JPH0855060A | Japan | A | |
| JPH0870452A | Japan | A | |
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| GB2293076A | United Kingdom | A | |
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| GB2288521A8 | United Kingdom | A8 | |
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| EP0674442A3 | European Patent Office (EPO) | A3 | |
| EP0674446A3 | European Patent Office (EPO) | A3 | |
| JPH08228343A | Japan | A | |
| JPH08228344A | Japan | A | |
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| CN1137212A | China | A | |
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| US5603012A | United States of America | A | |
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| US5625571A | United States of America | A | |
| US5689313A | United States of America | A | |
| EP0674266A3 | European Patent Office (EPO) | A3 | |
| US5699544A | United States of America | A | |
| EP0621691B1 | European Patent Office (EPO) | B1 | |
| US5703793A | United States of America | A | |
| DE69407471D1 | Germany | D1 |
11 legal events, as the office reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | |
|---|---|---|
| Application refused18R | 18R | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: THE APPLICATION HAS BEEN REFUSEDSTAA | STAA | |
| Title (correction)METHOD AND APPARATUS FOR INTERFACING WITH RAMRTI1 | RTI1 | |
| Despatch of communication of intention to grantORIGINAL CODE: EPIDOS AGRAGRAG | GRAG | |
| First examination report despatched17Q | 17Q | |
| Designated contracting statesAK | AK | |
| Request for examination filed17P | 17P | |
| Divisional application: reference to earlier applicationAC | AC | |
| Designated contracting statesAK | AK | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI |
Numbers
- Publication
- 0895166
- Publication, DOCDB
- 0895166
- Publication, EPODOC
- EP0895166
- Application
- 98202091
- Application, DOCDB
- 98202091
- Application, EPODOC
- EP19980202091
Titles3
- German
- Verfahren und Vorrichtung zur Schnittstellenbildung mit RAM-Speicher
- English
- Method and apparatus for interfacing with ram
- French
- Procédé et dispositif d'interface de mémoire à accès aléatoire
Classification
- CPC, 11
- G06F13/1689
- G06F12/0207
- G06F12/04
- G06F12/0607
- G06F13/1673
- G06F13/28
- H04N19/13
- H04N19/61
- H04N19/91
- H04N19/42
- H04N19/423
- IPC, 9
- G06F12 02
- G06F12 04
- G06F12 06
- G06F13 16
- G06F13 28
- G06T9 00
- H04N7 26
- H04N7 50
- H04N7 62
Designated states10
- Contracting states, 10
- Austria
- Belgium
- Switzerland
- Germany
- France
- United Kingdom
- Ireland
- Italy
- Liechtenstein
- Netherlands (Kingdom of the)