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IS42VS16400E-75BL Datasheet(PDF) 8 Page - Integrated Silicon Solution, Inc |
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IS42VS16400E-75BL Datasheet(HTML) 8 Page - Integrated Silicon Solution, Inc |
8 / 58 page IS42VS16400E 8 Integrated Silicon Solution, Inc. — www.issi.com Rev. A 05/15/09 TRUTH TABLE – CKE (1-4) CURRENT STATE COMMANDn ACTIONn CKEn-1 CKEn Power-Down X MaintainPower-Down L L SelfRefresh X MaintainSelfRefresh L L ClockSuspend X MaintainClockSuspend L L DeepPower-Down(8) X MaintainDeepPower-Down L L Power-Down(5) COMMANDINHIBITorNOP ExitPower-Down L H DeepPower-Down(8) X ExitDeepPower-Down L H SelfRefresh(6) COMMANDINHIBITorNOP ExitSelfRefresh L H Clock Suspend(7) X ExitClockSuspend L H AllBanksIdle COMMANDINHIBITorNOP Power-DownEntry H L AllBanksIdle(8) BURSTTERMINATE DeepPower-DownEntry H L AllBanksIdle AUTOREFRESH SelfRefreshEntry H L ReadingorWriting VALID ClockSuspendEntry H L See TRUTH TABLE – CURRENT STATE BANK n, COMMAND TO BANK H H NOTES: 1. CKEnisthelogicstateofCKEatclockedgen;CKEn-1 wasthestateofCKEatthepreviousclockedge. 2. CurrentstateisthestateoftheSDRAMimmediatelypriortoclockedgen. 3. COMMANDnisthecommandregisteredatclockedgen,andACTONnisaresultofCOMMANDn. 4. Allstatesandsequencesnotshownareillegalorreserved. 5. Exitingpower-downatclockedgen will put the device in the all banks idle state in time for clock edge n+1 (provided that tcks is met). 6. Exitingselfrefreshatclockedgen will put the device in all banks idle state once txsrismet.COMMANDINHIBITorNOP commands should be issued on clock edges occurring during the txsrperiod.AminimumoftwoNOPcommandsmustbesent during txsr period. 7. Afterexitingclocksuspendatclockedgen,thedevicewillresumeoperationandrecognizethenextcommandatclockedge n+1. 8.DeepPower-DownisapowersavingfeatureofthismobileSDRAMdevice.ThiscommandisBURSTTERMINATEwhenCKEis HIGHandDEEPPOWER-DOWNwhenCKEisLOW. |
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