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IS42S16400E-6TLI Datasheet(PDF) 3 Page - Integrated Silicon Solution, Inc |
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IS42S16400E-6TLI Datasheet(HTML) 3 Page - Integrated Silicon Solution, Inc |
3 / 55 page Integrated Silicon Solution, Inc. — www.issi.com3 Rev. C 08/07/09 IS42S16400E PIN FUNCTIONS Symbol TSOP Pin No. Type Function (In Detail) A0-A11 23to26 InputPin AddressInputs:A0-A11aresampledduringtheACTIVE 29to34 command(row-addressA0-A11)andREAD/WRITEcommand(A0-A7 22,35 withA10definingautoprecharge)toselectonelocationoutofthememoryarray intherespectivebank.A10issampledduringaPRECHARGEcommandtodeter- mineifallbanksaretobeprecharged(A10HIGH)orbankselectedby BA0,BA1(LOW).Theaddressinputsalsoprovidetheop-codeduringaLOAD MODEREGISTERcommand. BA0,BA1 20,21 InputPin BankSelectAddress:BA0andBA1defineswhichbanktheACTIVE,READ,WRITE orPRECHARGEcommandisbeingapplied. CAS 17 InputPin CAS , in conjunction with the RAS and WE, forms the device command. See the "CommandTruthTable"fordetailsondevicecommands. CKE 37 InputPin TheCKEinputdetermineswhethertheCLKinputisenabled.Thenextrisingedge oftheCLKsignalwillbevalidwhenisCKEHIGHandinvalidwhenLOW.WhenCKE isLOW,thedevicewillbeineitherpower-downmode,clocksuspendmode,orself refresh mode. CKEisan asynchronous input. CLK 38 InputPin CLKisthemasterclockinputforthisdevice.ExceptforCKE,allinputstothisdevice areacquiredinsynchronizationwiththerisingedgeofthispin. CS 19 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. DQ0to 2,4,5,7,8,10, DQPin DQ0toDQ15areI/Opins.I/Othroughthesepinscanbecontrolledinbyteunits DQ15 11,13,42,44,45, usingtheLDQMandUDQMpins. 47,48,50,51,53 LDQM, 15,39 InputPin LDQMandUDQMcontrolthelowerandupperbytesoftheI/Obuffers.Inread UDQM mode,LDQMandUDQMcontroltheoutputbuffer.WhenLDQMorUDQMisLOW, thecorrespondingbufferbyteisenabled,andwhenHIGH,disabled.Theoutputs gototheHIGHimpedancestatewhenLDQM/UDQMisHIGH.Thisfunctioncor- responds to OEinconventionalDRAMs.Inwritemode,LDQMandUDQMcontrol theinputbuffer.WhenLDQMorUDQMisLOW,thecorrespondingbufferbyteisen- abled,anddatacanbewrittentothedevice.WhenLDQMorUDQMisHIGH,input data is masked and cannot be written to the device. RAS 18 InputPin RAS , in conjunction with CAS and WE, forms the device command. See the "Com- mandTruthTable"itemfordetailsondevicecommands. WE 16 InputPin WE , in conjunction with RAS and CAS, forms the device command. See the "Com- mandTruthTable"itemfordetailsondevicecommands. VDDq 3,9,43,49 PowerSupplyPinVDDq is the output buffer power supply. VDD 1,14,27 PowerSupplyPinVDD is the device internal power supply. GNDq 6,12,46,52 PowerSupplyPin GNDq is the output buffer ground. GND 28,41,54 PowerSupplyPin GND is the device internal ground. |
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