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IS42S32800J-7BI Datasheet(PDF) 5 Page - Integrated Silicon Solution, Inc |
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IS42S32800J-7BI Datasheet(HTML) 5 Page - Integrated Silicon Solution, Inc |
5 / 60 page 5 Integrated Silicon Solution, Inc. - www.issi.com Rev. 0A 8/14/2014 IS42S32800J, IS45S32800J PIN FUNCTIONS Symbol Type Function (In Detail) A0-A11 Input Pin AddressInputs:A0-A11aresampledduringtheACTIVE command(row-addressA0-A11)andREAD/WRITEcommand(columnaddress A0-A8), with A10 defining auto precharge) to select one location out of the memory arrayintherespectivebank.A10issampledduringaPRECHARGEcommandto determineifallbanksaretobeprecharged(A10HIGH)orbankselectedby BA0,BA1(LOW).Theaddressinputsalsoprovidetheop-codeduringaLOAD MODEREGISTERcommand. 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. CKE is an 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. DQM0-DQM3 Input Pin DQM0-DQM3controlthefourbytesoftheI/Obuffers(DQ0-DQ31).Inread mode,DQMncontroltheoutputbuffer.WhenDQMnisLOW,thecorrespondingbuf- ferbyteisenabled,andwhenHIGH,disabled.TheoutputsgototheHIGHimped- ancestatewhenDQMnisHIGH.ThisfunctioncorrespondstoOE in conventional DRAMs.Inwritemode,DQMncontroltheinputbuffer.WhenDQMnisLOW,the correspondingbufferbyteisenabled,anddatacanbewrittentothedevice.When DQMnisHIGH,inputdataismaskedandcannotbewrittentothedevice. DQ0-DQ31 Input/OutputPin DataontheDataBusislatchedonthesepinsduringWritecommands,andbufferedafter Readcommands. 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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