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H5PS1G63JFRS6C Datasheet(PDF) 57 Page - Hynix Semiconductor |
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H5PS1G63JFRS6C Datasheet(HTML) 57 Page - Hynix Semiconductor |
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57 / 62 page  Rev. 1.7 / Nov 2011 57 Release H5PS1G63JFR Series 17. Input waveform timing tDS with differential data strobe enabled MR[bit10]=0, is referenced from the input signal crossing at the VIH(ac) level to the differential data strobe crosspoint for a rising signal, and from the input signal crossing at the VIL(ac) level to the differential data strobe crosspoint for a falling signal applied to the device under test. DQS, DQS signals must be monotonic between Vil(dc)max and Vih(dc)min. 18. Input waveform timing tDH with differential data strobe enabled MR[bit10]=0, is referenced from the differential data strobe crosspoint to the input signal crossing at the VIH(dc) level for a falling signal and from the differential data strobe crosspoint to the input signal crossing at the VIL(dc) level for a rising signal applied to the device under test. DQS, DQS signals must be monotonic between Vil(dc)max and Vih(dc)min. 19. Input waveform timing is referenced from the input signal crossing at the VIH(ac) level for a rising signal and VIL(ac) for a falling signal applied to the device under test. 20. Input waveform timing is referenced from the input signal crossing at the VIL(dc) level for a rising signal and VIH(dc) for a falling signal applied to the device under test. 21. tWTR is at lease two clocks (2 x nCK) independent of operation frequency. 22. tCKEmin of 3 clocks means CKE must be registered on three consecutive positive clock edges. CKE must remain at the valid input level the entire time it takes to achieve the 3 clocks of registration. Thus, after any CKE transition, CKE may not transition from its valid level during the time period of tIS + 2* tCK + tIH. 23. If tDS or tDH is violated, data corruption may occur and the data must be re-written with valid data before a valid READ can be executed. DQS VDDQ VIH(ac)min VIH(dc)min tDH tDS DQS VREF(dc) VSS VIL(dc)max VIL(ac)max tDH tDS Differential Input waveform timing |
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