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IS42S16400 Datasheet(PDF) 10 Page - Integrated Silicon Solution, Inc |
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IS42S16400 Datasheet(HTML) 10 Page - Integrated Silicon Solution, Inc |
10 / 55 page 10 Integrated Silicon Solution, Inc. — www.issi.com Rev. D 01/30/08 IS42S16400 8.CONCURRENTAUTOPRECHARGE:BanknwillinitiatetheAUTOPRECHARGEcommandwhenitsbursthasbeeninter- ruptedbybankm’sburst. 9.Burstinbankncontinuesasinitiated. 10.ForaREADwithoutautoprechargeinterruptedbyaREAD(withorwithoutautoprecharge),theREADtobankmwillinterrupt theREADonbankn,CASlatencylater(ConsecutiveREADBursts). 11.ForaREADwithoutautoprechargeinterruptedbyaWRITE(withorwithoutautoprecharge),theWRITEtobankmwillinter- rupttheREADonbanknwhenregistered(READtoWRITE).DQMshouldbeusedoneclockpriortotheWRITEcommandto prevent bus contention. 12.ForaWRITEwithoutautoprechargeinterruptedbyaREAD(withorwithoutautoprecharge),theREADtobankmwillinterrupt theWRITEonbanknwhenregistered(WRITEtoREAD),withthedata-outappearingCASlatencylater.ThelastvalidWRITE tobanknwillbedata-inregisteredoneclockpriortotheREADtobankm. 13.ForaWRITEwithoutautoprechargeinterruptedbyaWRITE(withorwithoutautoprecharge),theWRITEtobankmwillinter- rupttheWRITEonbanknwhenregistered(WRITEtoWRITE).ThelastvalidWRITEtobanknwillbedata-inregisteredone clockpriortotheREADtobankm. 14.ForaREADwithautoprechargeinterruptedbyaREAD(withorwithoutautoprecharge),theREADtobankmwillinterruptthe READonbankn,CASlatencylater.ThePRECHARGEtobanknwillbeginwhentheREADtobankmisregistered(FigCAP 1). 15.ForaREADwithautoprechargeinterruptedbyaWRITE(withorwithoutautoprecharge),theWRITEtobankmwillinterrupt theREADonbanknwhenregistered.DQMshouldbeusedtwoclockspriortotheWRITEcommandtopreventbuscontention. ThePRECHARGEtobanknwillbeginwhentheWRITEtobankmisregistered(FigCAP2). 16.ForaWRITEwithautoprechargeinterruptedbyaREAD(withorwithoutautoprecharge),theREADtobankmwillinterrupt theWRITEonbanknwhenregistered,withthedata-outappearingCASlatencylater.ThePRECHARGEtobanknwillbegin after tWR is met, where twrbeginswhentheREADtobankmisregistered.ThelastvalidWRITEtobanknwillbedata-inregis- teredoneclockpriortotheREADtobankm(FigCAP3). 17.ForaWRITEwithautoprechargeinterruptedbyaWRITE(withorwithoutautoprecharge),theWRITEtobankmwillinterrupt theWRITEonbanknwhenregistered.ThePRECHARGEtobanknwillbeginaftertwrismet,wheretWRbeginswhenthe WRITEtobankmisregistered.ThelastvalidWRITEtobanknwillbedataregisteredoneclockpriortotheWRITEtobankm (FigCAP4). |
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