按照測(cè)量文案

Hi3536-IntegrityHi3536-IntegrityReleasedDate:System2015-07-按照DDR31866MhzAC135標(biāo)System2015-07-按照DDR31866MhzAC135標(biāo)準(zhǔn)測(cè)BoardHi3536DMEBDRAM DRAM-4Gbit-933MHz-16bit-1.5V-DSA72004CDRAMOperatingVDD/Vref-CA/Vref-BoardHi3536DMEBDRAM DRAM-4Gbit-933MHz-16bit-1.5V-DSA72004CDRAMOperatingVDD/Vref-CA/Vref-RunningSignalIntegritySummary&Judgment&MeasurementSequenceSignalIntegritySummary&Judgment&MeasurementSequence-FAILPower-FAILSignalIntegrity-FAILPowerUpInitializationSequenceCheck?StableVDDto/PowerUpInitializationSequenceCheck?StableVDDto/Reset?StableVDDto/Reset/RESETneedstobemaintainedforminimum200uswithstablepower.(JEDECspec.)PowerUpInitializationSequenceCheck?/ResetUpToCKE?PowerUpInitializationSequenceCheck?/ResetUpToCKE?CKEUpAfter/RESETisde-asserted.Waitforanother500usuntilCKEbecomesactive.(JEDECspec.)Clocks(CK,CK#)needtobestartedandstabilizedforatleast10nsor5tCK(whichislarger)beforeCKEgoesactive.(JEDECPowerUpInitializationSequenceCheck?CKEFallingEdgeToResetRisingPowerUpInitializationSequenceCheck?CKEFallingEdgeToResetRising?VDDRisingVDDRisingThepowervoltageramptimebetween300mvtoVDDminmustbenogreaterthan200ms.(JEDECCKEFallingEdgetoResetRisingEdgeCKEispulled“Low”anytimebeforeRESET#beingde-asserted(min.time10ns).ResetInitializationSequenceCheck??ResetLowLevelResetInitializationSequenceCheck??ResetLowLevelResetLowLevelResetLowLevelVoltagemustbewithin300mV.ResetInitializationSequenceCheck?CKEFallingEdgeToResetInitializationSequenceCheck?CKEFallingEdgeToResetRisingResetRisingEdgeCKEispulled“Low”anytimebeforeRESET#beingde-asserted(min.time10ns).AveragePeriodicRefreshIntervalCheck?AveragePeriodicRefreshAveragePeriodicRefreshIntervalCheck?AveragePeriodicRefresh?PowerCheck?PowerNoiseCheck?VDDSupply-AC-DQPowerCheck?PowerNoiseCheck?VDDSupply-AC-DQSignalIntegrityTestResult?ClockSignalIntegrityTest-----SignalIntegrityTestResult?ClockSignalIntegrityTest----------SignalIntegrityTestResultSignalIntegrityTestResultSignalIntegrityTestResultSignalIntegrityTestResultAbout1T&2TsignalForAbout1T&2TsignalFor1Tsignalinclude:CS,ODT,CKE;otheraddressandcmdsignalare2TFor1Tsignal，youcantestthesignalusingtestanalysismodule,butfor2Tsignalyoucan’ttestusingthetestAbout1T&2TsignalWhenAbout1T&2TsignalWhenyoutest2Tsignal，giveyouawhenyoutestyoucanusepersistenceandfastsamplingSignalIntegrityTestResult?1TCommandSignalIntegrityTestSignalIntegrityTestResult?1TCommandSignalIntegrityTest----SignalIntegrityTestResultSignalIntegrityTestResult?2T_CMD_ADDRDDR0-?2T_CMD_ADDRDDR0-SignalIntegrityTestResultSignalIntegrityTestResult?2T_CMD_ADDRDDR1-?2T_CMD_ADDRDDR0-SignalIntegrityTestSignalIntegrityTestResult?SignalIntegrityTestResult?DataSignalIntegrityTestedgeSkew(tDQSQ)InputSlewRate(Setup---sssssSignalIntegrityTestResult?DataSignalIntegrityTestedgeSkew(tDQSQ)InputSlewRate(Setup---sssssDQS-OutedgetoClockedgeClocktoFirstRisingedgeofSignalIntegrityTestResultSignalIntegrityTestResult?DDR0-?DDR0-SignalIntegrityTestResultSignalIntegrityTestResult?DDR0-?DDR0-SignalIntegrityTestResultSignalIntegrityTestResult?DDR1-?DDR1-SignalIntegrityTestResultSignalIntegrityTestResult?DDR1-?DDR1-DDRtrainingDDRtraining?DDR0-writeDDRtrainingDDRtraining?DDR0-readDDRtrainingDDRtraining?DDR1-writeDDRtrainingDDRtraining?DDR1-read關(guān)于DQS臺(tái)階的關(guān)于DQS臺(tái)階的解關(guān)于DQ眼圖中關(guān)于DQ眼圖中心偏移問(wèn)題的解關(guān)于DQ眼圖中關(guān)于DQ眼圖中心偏移問(wèn)題的解從仿真結(jié)果可得到以1、在測(cè)試點(diǎn)上的波形與實(shí)測(cè)波形是吻合的，均是Setup的上升沿/下降沿比較、仿真Di內(nèi)的波形將t的空間打開(kāi)，因此tu的時(shí)間增大p左右。這一點(diǎn)與iing結(jié)果也是吻合，測(cè)試結(jié)果會(huì)認(rèn)為t不足，但認(rèn)為是中心位置，可見(jiàn)inig就是以i內(nèi)窗口為基準(zhǔn)找