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Special Measurements

DDR2 Measurement Bundle

Revision 1.0, December, 2009
By: ASA
Free

Description

This Measurement Bundle contains a total of 53 Measurement Apps, enabling measurement of all special parameters required by the DDR2 Compliance App. Some of the included Apps are combination Apps which measure multiple statistics directly for the Compliance App. Other included Apps provide Compliance Breakout capability for the combination Apps.

If you are looking for the full DDR2 Compliance App (which includes this Bundle), ASA recommends that you specifically download that through the Compliance App link below.

Specifications/Details

Spec Level:      DDR2 - JESD79-2E

App Update Level/Date:      1.0, December 2009

Minimum M1 version required:      v6.03

Measurements Made:

  • Multiple; see list below

Statistics Produced:

  • Multiple; see list below

Assumptions:

  • Unless otherwise specified by the specific Measurement App, all require Strobe as 1st signal, Clock as 2nd signal, and Data as 3rd signal

Compliance Breakout™ sub-Apps included with this App:     

  • Combined tDQSH/tDQSL/tDQSS
  • Combined tDQSCK/tDSS/tDSH
  • Combined tDS/tDH
  • Combined tIS/tIH
  • Combined tDQSQ/tQH/tDIPW
  • Combined tDS1/tDH1
  • Combined tIS/tIH
  • Combined tRPRE/tWPRE/tRPST/tWPST
  • Overshoot area for Cmd/Addr/DQ
  • Undershoot area for Cmd/Addr/DQ
  • Overshoot area for CK/DQS
  • Undershoot area for CK/DQS
  • tSRQse min/max only
  • tAC - DQ output access time from CK/CK#
  • tDH - DQ and DM input hold time (differential strobe)
  • tDH1 - DQ and DM input hold time (single-ended strobe)
  • tDIPW - DQ and DM input pulse width for each input
  • tDQSCK - DQS output access time from CK
  • tDQSH - DQS input HIGH pulse width
  • tDQSL - DQS input LOW pulse width
  • tDQSQ - DQS-DQ skew for DQS and associated DQ signals
  • tDQSS - DQS latching rising transitions to associated clock edges
  • tDS - DQ and DM input setup time (differential strobe)
  • tDS1 - DQ and DM input setup time (single-ended strobe)
  • tDSH - DQS falling edge hold time from CK
  • tDSS - DQS falling edge to CK setup time
  • tHZ(DQ) - Data-out high-impedance time from CK/CK#
  • tIH - Address and control input hold time
  • tIS - Address and control input setup time
  • tLZ/tHZ for DQ
  • tLZ/tHZ for DQS
  • tLZ(DQ) - DQ low-impedance time from CK/CK#
  • tLZ(DQS) - DQS/DQS# low-impedance time from CK/CK#
  • tQH - DQ/DQS output hold time from DQS
  • tRPRE - Read preamble
  • tRPST - Read postamble
  • tSRQse - Single-ended output slew rate
  • tWPRE - Write preamble
  • tWPST - Write postamble
  • combined tIS/tIH
  • tERR(n) for n=7-8-9-10
  • tERR(n) for n=11-12-13-14
  • tERR(n) for n=15-16-17-18
  • tERR(n) for n=19-20-21-22
  • tERR(n) for n=23-24-25-26
  • tERR(n) for n=27-28-29-30
  • tERR(n) for n=31-32-33-34
  • tERR(n) for n=35-36-37-38
  • tERR(n) for n=39-40-41-42
  • tERR(n) for n=43-44-45-46
  • tERR(n) for n=47-48-49-50

This Special Measurement bundle is used by:     DDR2 Compliance App

Features

  • Not Applicable for this App

Comments

Some of the Measurement Apps included in this bundle combine multiple parameters together, and have separate Apps that measure each of those parameters individually as well. The primary purpose of a combined Measurement App is for use in a Compliance App, where it allows the test to proceed as quickly as possible by minimizing the recalculation that would be required for measuring similar parameters in different Apps. The individual Measurement Apps, on the other hand, are primarily intended for use in a Debug scenario, where having all of the statistics and data for a particular parameter is required.

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