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IS42S86400B-6TL Datasheet(PDF) 6 Page - Integrated Silicon Solution, Inc |
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IS42S86400B-6TL Datasheet(HTML) 6 Page - Integrated Silicon Solution, Inc |
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6 / 61 page  6 Integrated Silicon Solution, Inc. — www.issi.com Rev. C 08/27/09 IS42S86400B, IS42/45S16320B PIN FUNCTIONS Symbol Type Function (In Detail) A0-A12 InputPin AddressInputs:A0-A12aresampledduringtheACTIVEcommand(row-address A0-A12)andREAD/WRITEcommand(columnaddressA0-A9(x16);A0-A9,A11 (x8);withA10definingautoprecharge)toselectonelocationoutofthememory arrayintherespectivebank.A10issampledduringaPRECHARGEcommandto determineifallbanksaretobeprecharged(A10HIGH)orbankselectedbyBA0, BA1(LOW).Theaddressinputsalsoprovidetheop-codeduringaLOADMODE REGISTERcommand. 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.ForIS42/45S16320Bonly. DQM InputPin ForIS42S86400Bonly. DQ0-DQ7 (x8)or Input/Output DataontheDataBusislatchedonDQpinsduringWritecommands,andbufferedfor DQ0-DQ15(x16) 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 PowerSupplyPin Vddq is the output buffer power supply. Vdd PowerSupplyPin Vdd is the device internal power supply. Vssq PowerSupplyPin Vssq is the output buffer ground. Vss PowerSupplyPin Vss is the device internal ground. |
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