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IS46R32400E Datasheet(PDF) 9 Page - Integrated Silicon Solution, Inc |
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IS46R32400E Datasheet(HTML) 9 Page - Integrated Silicon Solution, Inc |
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9 / 31 page  Integrated Silicon Solution, Inc. 9 Rev. C 1/16/14 IS43/46R16800E, IS43/46R32400E ADDRESSING TRUTH TABLE - CKE CKE n-1 CKE n Current State COMMAND n ACTION n NOTES L L PowerDown X MaintainPowerDown L L SelfRefresh X MaintainSelfRefresh L H PowerDown NOPorDESELECT ExitPowerDown 6 L H SelfRefresh NOPorDESELECT ExitSelfRefresh 6,7 H L AllBanksIdle NOPorDESELECT PrechargePowerDownEntry 6 H L Bank(s)Active NOPorDESELECT ActivePowerDownEntry 6 H L AllBanksIdle AUTOREFRESH SelfRefreshentry H H SeeTruthTables-Commands Notes: 1. CKEnisthelogicstateofCKEatclockedgen;CKEn-1wasthestateofCKEatthepreviousclockedge. 2. CurrentstateisthestateofDDRimmediatelypriortoclockedgen. 3. COMMANDnisthecommandregisteredatclockedgen,andACTIONnistheresultofCOMMANDn. 4. All states and sequences not shown are illegal or reserved. 5. CKEmustnotgoLOWduringaReadorWrite,andmuststayHIGHuntilaftertrpst or twr, respectively. 6. DESELECTandNOParefunctionallyinterchangeable. 7.NOPsorDeselectsmustbeissuedforatleasttsnrafterSelf-Refreshexitbeforeanyothercommand.AfterDLLReset,at least txsrdmustelapsebeforeanyReadcommandsoccur. Basic Timing Parameters for Commands NOTE: Input = A0 - An, BA0, BA1, CKE, CS, RAS, CAS, WE; An = Address bus MSB = Don't Care t CL t CH t IS t IH t CK CK CK Input Valid Valid Valid |
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