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IS45VS16400L Datasheet(PDF) 10 Page - Integrated Silicon Solution, Inc |
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IS45VS16400L Datasheet(HTML) 10 Page - Integrated Silicon Solution, Inc |
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10 / 56 page  10 Integrated Silicon Solution, Inc. — www.issi.com Rev. 00A 04/10/2012 IS42VS16400L IS45VS16400L TRUTH TABLE – CURRENT STATE BANK n, COMMAND TO BANK m (1-6) CURRENTSTATE COMMAND(ACTION) CS RAS CAS WE Any COMMANDINHIBIT(NOP/Continuepreviousoperation) H X X X NOOPERATION(NOP/Continuepreviousoperation) L H H H Idle AnyCommandOtherwiseAllowedtoBankm X X X X Row ACTIVE(Selectandactivaterow) L L H H Activating, READ(SelectcolumnandstartREADburst)(7) L H L H Active,or WRITE(SelectcolumnandstartWRITEburst)(7) L H L L Precharging PRECHARGE L L H L Read ACTIVE(Selectandactivaterow) L L H H (Auto READ(SelectcolumnandstartnewREADburst)(7,10) L H L H Precharge WRITE(SelectcolumnandstartWRITEburst)(7,11) L H L L Disabled) PRECHARGE(9) L L H L Write ACTIVE(Selectandactivaterow) L L H H (Auto READ(SelectcolumnandstartREADburst)(7,12) L H L H Precharge WRITE(SelectcolumnandstartnewWRITEburst)(7,13) L H L L Disabled) PRECHARGE(9) L L H L Read ACTIVE(Selectandactivaterow) L L H H (WithAuto READ(SelectcolumnandstartnewREADburst)(7,8,14) L H L H Precharge) WRITE(SelectcolumnandstartWRITEburst)(7,8,15) L H L L PRECHARGE(9) L L H L Write ACTIVE(Selectandactivaterow) L L H H (WithAuto READ(SelectcolumnandstartREADburst)(7,8,16) L H L H Precharge) WRITE(SelectcolumnandstartnewWRITEburst)(7,8,17) L H L L PRECHARGE(9) L L H L NOTE: 1.ThistableapplieswhenCKEn-1wasHIGHandCKEnisHIGH(TruthTable-CKE)andaftertxsrhasbeenmet(iftheprevi- ousstatewasselfrefresh). 2.Thistabledescribesalternatebankoperation,exceptwherenoted;i.e.,thecurrentstateisforbankn andthecommands shownarethoseallowedtobeissuedtobankm (assumingthatbankm isinsuchastatethatthegivencommandisallowable).Excep- tionsarecoveredinthenotesbelow. 3.Currentstatedefinitions: Idle:Thebankhasbeenprecharged,andtrphasbeenmet. RowActive:Arowinthebankhasbeenactivated,andtrcdhasbeenmet.Nodatabursts/accessesandnoregister accessesareinprogress. Read:AREADbursthasbeeninitiated,withautoprechargedisabled,andhasnotyetterminatedorbeentermi- nated. Write:AWRITEbursthasbeeninitiated,withautoprechargedisabled,andhasnotyetterminatedorbeentermi- nated. Readw/Auto PrechargeEnabled:StartswithregistrationofaREADcommandwithautoprechargeenabled,andendswhentrphasbeen met.Oncetrpismet,thebankwillbeintheidlestate. Writew/Auto PrechargeEnabled:StartswithregistrationofaWRITEcommandwithautoprechargeenabled,andendswhentrphasbeen met.Oncetrpismet,thebankwillbeintheidlestate. 4.AUTOREFRESH,SELFREFRESHandLOADMODEREGISTERcommandsmayonlybeissuedwhenallbanksareidle. 5.ABURSTTERMINATEcommandcannotbeissuedtoanotherbank;itappliestothebankrepresentedbythecurrentstate only. 6.Allstatesandsequencesnotshownareillegalorreserved. 7.READsorWRITEstobankmlistedintheCommand(Action)columnincludeREADsorWRITEswithautoprechargeenabled andREADsorWRITEswithautoprechargedisabled. |
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