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NT5TU64M8EE Datasheet(PDF) 88 Page - Nanya Technology Corporation. |
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NT5TU64M8EE Datasheet(HTML) 88 Page - Nanya Technology Corporation. |
88 / 96 page ![]() DDR2 512Mb SDRAM NT5TU64M8EE / NT5TU32M16EG 88 Version 1.0 Nanya Technology Corp.© 09/2014 All Rights Reserved Specific Note 19 tRPST end point and tRPRE begin point are not referenced to a specific voltage level but specify when the device output is no longer driving (tRPST), or begins driving (tRPRE). The following figure shows a method to calculate these points when the device is no longer driving (tRPST), or begins driving (tRPRE) by measuring the signal at two different voltages. The actual voltage measurement points are not critical as long as the calculation is consistent. Specific Note 20 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, DQSsignals must be monotonic between Vil(dc)max and Vih(dc)min. Specific Note 21 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, DQSsignals must be monotonic between Vil(dc)max and Vih(dc)min. |
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