IS45VS83200D datasheet(6/61 Pages) ISSI

Part #	IS45VS83200D

Description	Random column address every clock cycle

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Manufacturer	ISSI [Integrated Silicon Solution, Inc]

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Integrated Silicon Solution, Inc. — www.issi.com

Rev. 00A

04/21/09

IS42VS83200D, IS42VS16160D

IS45VS83200D, IS45VS16160D

PIN FUNCTIONS

Symbol

Type

Function (In Detail)

A0-A12

InputPin

AddressInputs:A0-A12aresampledduringtheACTIVEcommand(row-address

A0-A12)andREAD/WRITEcommand(columnaddressA0-A9(x8),orA0-A8(x16);

withA10definingautoprecharge)toselectonelocationoutofthememoryarrayin

therespectivebank.A10issampledduringaPRECHARGEcommandtodetermine

ifallbanksaretobeprecharged(A10HIGH)orbankselectedbyBA0,BA1(LOW).

Theaddressinputsalsoprovidetheop-codeduringaLOADMODEREGISTER

command.

BA0,BA1

InputPin

BankSelectAddress:BA0andBA1defineswhichbanktheACTIVE,READ,WRITE

orPRECHARGEcommandisbeingapplied.

CAS

InputPin

CAS

, in conjunction with the RAS and WE, forms the device command. See the

"CommandTruthTable"fordetailsondevicecommands.

CKE

InputPin

TheCKEinputdetermineswhethertheCLKinputisenabled.Thenextrisingedge

oftheCLKsignalwillbevalidwhenisCKEHIGHandinvalidwhenLOW.WhenCKE

isLOW,thedevicewillbeineitherpower-downmode,clocksuspendmode,orself

refresh mode. CKEisan asynchronous input.

CLK

InputPin

CLKisthemasterclockinputforthisdevice.ExceptforCKE,allinputstothisdevice

areacquiredinsynchronizationwiththerisingedgeofthispin.

CS

InputPin

TheCS input determines whether command input is enabled within the device.

Command input is enabled when CSisLOW,anddisabledwithCSisHIGH.The

device remains in the previous state when CSisHIGH.

DQML,

InputPin

DQMLandDQMHcontrolthelowerandupperbytesoftheI/Obuffers.Inread

DQMH

mode,DQMLandDQMHcontroltheoutputbuffer.WhenDQMLorDQMHisLOW,the

correspondingbufferbyteisenabled,andwhenHIGH,disabled.Theoutputsgoto

theHIGHimpedancestatewhenDQML/DQMHisHIGH.Thisfunctioncorrespondsto

OE

inconventionalDRAMs.Inwritemode,DQMLandDQMHcontroltheinputbuffer.

WhenDQMLorDQMHisLOW,thecorrespondingbufferbyteisenabled,anddata

canbewrittentothedevice.WhenDQMLorDQMHisHIGH,inputdataismasked

andcannotbewrittentothedevice.ForIS42VS16160Donly.

DQM

InputPin

ForIS42VS83200Donly.

DQ0-DQ7 or

Input/Output

DataontheDataBusislatchedonDQpinsduringWritecommands,andbufferedfor

DQ0-DQ15

outputafterReadcommands.

RAS

InputPin

RAS

, in conjunction with CAS and WE, forms the device command. See the "Com-

mandTruthTable"itemfordetailsondevicecommands.

WE

InputPin

WE

, in conjunction with RAS and CAS, forms the device command. See the "Com-

mandTruthTable"itemfordetailsondevicecommands.

Vddq

PowerSupplyPinVddq is the output buffer power supply.

Vdd

PowerSupplyPinVdd is the device internal power supply.

Vssq

PowerSupplyPinVssq is the output buffer ground.

Vss

PowerSupplyPinVss is the device internal ground.

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