IS46R32800F datasheet(11/32 Pages) ISSI

Part #	IS46R32800F

Description	Auto Precharge

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Manufacturer	ISSI [Integrated Silicon Solution, Inc]

Direct Link	http://www.issi.com

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11 / 32 page

Integrated Silicon Solution, Inc.

11

Rev. 0A

03/24/2014

IS43R83200F

IS43/46R16160F, IS43/46R32800F

ADDRESSING

TRUTH TABLE - CKE

CKE n-1 CKE n Current State

COMMAND n

ACTION n

NOTES

L

PowerDown

X

MaintainPowerDown

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

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

Input

Valid

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