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IS45R16320F Datasheet(PDF) 8 Page - Integrated Silicon Solution, Inc |
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IS45R16320F Datasheet(HTML) 8 Page - Integrated Silicon Solution, Inc |
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8 / 68 page  8 Integrated Silicon Solution, Inc. — www.issi.com Rev. 00A 11/5/2013 IS42/45R86400F/16320F/32160F, IS42/45S86400F/16320F/32160F PIN FUNCTIONS Symbol Type Function (In Detail) A0-A12 Input Pin AddressInputs:A0-A12aresampledduringtheACTIVEcommand(row-address A0-A12)andREAD/WRITEcommand(columnaddressA0-A9,A11(x8);A0-A9 (x16); A0-A8 (x32); with A10 defining auto precharge) to select one location out of thememoryarrayintherespectivebank.A10issampledduringaPRECHARGE commandtodetermineifallbanksaretobeprecharged(A10HIGH)orbank selectedbyBA0,BA1(LOW).Theaddressinputsalsoprovidetheop-codeduringa LOADMODEREGISTERcommand. BA0,BA1 Input Pin BankSelectAddress:BA0andBA1defineswhichbanktheACTIVE,READ,WRITE orPRECHARGEcommandisbeingapplied. CAS Input Pin CAS , in conjunction with the RAS and WE, forms the device command. See the "CommandTruthTable"fordetailsondevicecommands. CKE Input Pin TheCKEinputdetermineswhethertheCLKinputisenabled.Thenextrisingedge oftheCLKsignalwillbevalidwhenisCKEHIGHandinvalidwhenLOW.WhenCKE isLOW,thedevicewillbeineitherpower-downmode,clocksuspendmode,orself refresh mode. CKEisan asynchronous input. CLK Input Pin CLKisthemasterclockinputforthisdevice.ExceptforCKE,allinputstothisdevice are acquired in synchronization with the rising edge of this pin. CS Input Pin 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. DQM: x8 Input Pin DQxpinscontrolthebytesoftheI/Obuffers.Forexamplewithx16,inreadmode, DQML,DQMH:x16 DQMLandDQMHcontroltheoutputbuffer.WhenDQMLorDQMHisLOW,the DQM0-DQM3:x32 correspondingbufferbyteisenabled,andwhenHIGH,disabled.Theoutputsgoto theHIGHimpedancestatewhenDQML/DQMHisHIGH.Thisfunctioncorresponds to OEinconventionalDRAMs.Inwritemode,DQMLandDQMHcontroltheinput buffer.WhenDQMLorDQMHisLOW,thecorrespondingbufferbyteisenabled, anddatacanbewrittentothedevice.WhenDQMLorDQMHisHIGH,inputdatais masked and cannot be written to the device. DQ0-DQ7:x8 Input/Output DataontheDataBusislatchedonDQpinsduringWritecommands,andbufferedfor DQ0-DQ15: x16 output after Read commands. DQ0-DQ31: x32 RAS Input Pin RAS , in conjunction with CAS and WE, forms the device command. See the "Com- mandTruthTable"itemfordetailsondevicecommands. WE Input Pin WE , in conjunction with RAS and CAS, forms the device command. See the "Com- mandTruthTable"itemfordetailsondevicecommands. Vddq Power Supply PinVddq is the output buffer power supply. Vdd Power Supply PinVdd is the device internal power supply. Vssq Power Supply PinVssq is the output buffer ground. Vss Power Supply PinVss is the device internal ground. |
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