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DDR Analysis
User manual
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Table of contents
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Tektronix DDR Analysis User manual

DDR Analysis Memory Interface Electrical Verification and Debug Solution
Printable Application Help
*P077023110*
077-0231-10
DDR Analysis Memory Interface Electrical Verification and Debug Solution
Printable Application Help
www.tektronix.com
077-0231-10
Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14150 SW Karl Braun Drive P.O. Box 500 Beaverton, OR 97077 USA
For product information, sales, service, and technical support:
■
In North America, call 1-800-833-9200.
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Worldwide, visit www.tektronix.com to find contacts in your area.

Table of Contents

Welcome ............................................................................................................................................................. xi
Introduction to the application
Related documentation .................................................................................................................................. 1
Conventions ................................................................................................................................................... 1
Technical support ........................................................................................................................................... 2
Customer feedback ........................................................................................................................................ 2
Getting started
Product description ........................................................................................................................................ 5
DDRA prerequisites ....................................................................................................................................... 6
Requirements and restrictions ....................................................................................................................... 6
Supported probes ........................................................................................................................................... 6
Installing the application ................................................................................................................................. 7
About DDRA ................................................................................................................................................... 8
Operating basics
About basic operations ................................................................................................................................... 9
Starting the application ............................................................................................................................. 9
Menu controls ........................................................................................................................................... 9
Virtual keypad ........................................................................................................................................... 9
Tips on the DDRA user interface ............................................................................................................ 10
Basic oscilloscope functions ........................................................................................................................ 11
Application directories ............................................................................................................................ 11
File name extensions ............................................................................................................................. 11
Returning to the application .................................................................................................................... 11
Control panel .......................................................................................................................................... 11
Saving and recalling setups ......................................................................................................................... 12
Saving a setup ........................................................................................................................................ 12
Recalling a saved setup ......................................................................................................................... 12
Recalling the default setup ..................................................................................................................... 13
Search and mark .......................................................................................................................................... 13
Limits ............................................................................................................................................................ 14
Dynamic limits .............................................................................................................................................. 15
DDR Analysis Printable Application Help
i
Table of Contents
Setting up DDR for analysis ......................................................................................................................... 16
DDR standards and their measurements ............................................................................................... 16
Derating .................................................................................................................................................. 25
About DDR analysis ............................................................................................................................... 28
Step 1: Generation rate and levels ......................................................................................................... 28
Step 2: Interposer filter ........................................................................................................................... 31
Step 3: Measurements and sources ....................................................................................................... 33
Step 4: Burst detection method .............................................................................................................. 38
Step 5: Burst detection settings .............................................................................................................. 42
Step 6:Thresholds and scaling ............................................................................................................... 42
DQ-DQS phase alignment ...................................................................................................................... 44
Chip select latency + DQ-DQS phase alignment ................................................................................... 46
Logic state + burst latency ...................................................................................................................... 47
Visual search .......................................................................................................................................... 50
Measurement levels ............................................................................................................................... 53
Hints ....................................................................................................................................................... 54
Results as statistics ................................................................................................................................ 54
Plots ....................................................................................................................................................... 55
Reports ................................................................................................................................................... 55
Switching between the DDRA and DPOJET applications ...................................................................... 55
Salient features of MSO-DDRA integration ............................................................................................ 56
Tutorial
Introduction to the tutorial ............................................................................................................................. 57
Setting up the oscilloscope .......................................................................................................................... 57
Starting the application ................................................................................................................................. 57
Waveform files ............................................................................................................................................. 57
Recalling a waveform file ............................................................................................................................. 57
Taking a measurement ................................................................................................................................ 58
Parameters
About parameters ......................................................................................................................................... 61
Step 1: Generation rate and levels parameters ........................................................................................... 61
Step 2: Interposer filter parameters .............................................................................................................. 62
Step 3: Measurement and sources parameters ........................................................................................... 62
Step 4: Burst detection method parameters ................................................................................................. 63
Step 5: Burst detection settings parameters ................................................................................................ 63
Step 6: Thresholds and scaling parameters ................................................................................................. 65
ii DDR Analysis Printable Application Help
Table of Contents
Reference
DDR measurement sources ......................................................................................................................... 67
DDR2 measurement sources ....................................................................................................................... 69
DDR3 measurement sources ....................................................................................................................... 73
DDR3L measurement sources ..................................................................................................................... 77
DDR4 measurement sources ....................................................................................................................... 81
GDDR5 measurement sources .................................................................................................................... 84
LPDDR measurement sources .................................................................................................................... 86
LPDDR2 measurement sources .................................................................................................................. 88
LPDDR3 measurement sources .................................................................................................................. 92
LPDDR4 measurement sources .................................................................................................................. 96
Measurement range limits ............................................................................................................................ 99
Dynamic limits for DDR measurements ..................................................................................................... 100
Dynamic limits for DDR2 measurements ................................................................................................... 101
Dynamic limits for DDR3 measurements ................................................................................................... 101
Dynamic limits for DDR3L measurements ................................................................................................. 102
Dynamic limits for DDR4 measurements ................................................................................................... 103
Dynamic limits for LPDDR measurements ................................................................................................. 104
Dynamic limits for LPDDR2 measurements ............................................................................................... 104
Dynamic limits for LPDDR3 measurments ................................................................................................. 105
Dynamic limits for LPDDR4 measurements ............................................................................................... 106
Vih-Vil reference levels .............................................................................................................................. 107
Using digital channels ................................................................................................................................ 109
Error codes and warnings .......................................................................................................................... 116
Algorithms
About algorithms ........................................................................................................................................ 121
Write measurements .................................................................................................................................. 121
Data eye height .................................................................................................................................... 121
Data eye width ...................................................................................................................................... 122
DDRARXMask ...................................................................................................................................... 122
tDQSS .................................................................................................................................................. 123
tDQS2DQ ............................................................................................................................................. 123
VIHL_AC .............................................................................................................................................. 124
SRIN_dIVW_Rise ................................................................................................................................. 124
SRIN_dIVW_Fall .................................................................................................................................. 124
TdIPW-High .......................................................................................................................................... 124
DDR Analysis Printable Application Help iii
Table of Contents
TdIPW-Low ........................................................................................................................................... 124
Differential DQS measurements ................................................................................................................ 124
Input Slew-Diff-Rise(DQS) ................................................................................................................... 124
Input Slew-Diff-Fall(DQS) ..................................................................................................................... 125
tDH-Diff(base) ...................................................................................................................................... 125
tDH-Diff(derated) .................................................................................................................................. 126
tDH-Diff(Vref-based) ............................................................................................................................. 126
tDS-Diff(base) ....................................................................................................................................... 126
tDS-Diff(derated) .................................................................................................................................. 127
tDS-Diff(Vref-based) ............................................................................................................................. 127
tDQSH .................................................................................................................................................. 127
tDQSL ................................................................................................................................................... 128
tDSS-Diff .............................................................................................................................................. 128
tDSH-Diff .............................................................................................................................................. 128
tDQSS-Diff ............................................................................................................................................ 128
Single ended DQS ..................................................................................................................................... 128
Slew Rate-Hold-SE-Fall(DQS) ............................................................................................................. 128
Slew Rate-Hold-SE-Rise(DQS) ............................................................................................................ 129
Slew Rate-Setup-SE-Fall(DQS) ........................................................................................................... 129
Slew Rate-Setup-SE-Rise(DQS) .......................................................................................................... 129
tDS-SE(base) ....................................................................................................................................... 129
tDIPW-SE ............................................................................................................................................. 129
tDSS-SE ............................................................................................................................................... 129
tDSH-SE ............................................................................................................................................... 129
tDQSS-SE ............................................................................................................................................ 130
tDH-SE(base) ....................................................................................................................................... 130
tDVAC(CK) ................................................................................................................................................. 130
tWPRE ....................................................................................................................................................... 130
tWPST ........................................................................................................................................................ 131
tWRPDE ..................................................................................................................................................... 132
tWRSRE ..................................................................................................................................................... 132
Differential DQS read measurements ........................................................................................................ 132
tDQSCK-Diff ......................................................................................................................................... 132
tDQSQ-DBI ........................................................................................................................................... 133
tDQSQ-Diff ........................................................................................................................................... 133
tAC-Diff ................................................................................................................................................. 133
tQH ....................................................................................................................................................... 133
SRQdiff-Rise(DQS) .............................................................................................................................. 134
SRQdiff-Fall(DQS) ................................................................................................................................ 134
iv DDR Analysis Printable Application Help
Table of Contents
Single-ended DQS read measurements .................................................................................................... 135
tDQSQ-SE ............................................................................................................................................ 135
tDQSCK-SE .......................................................................................................................................... 135
DDR2-tDQSCK ..................................................................................................................................... 135
Slew rate DQ .............................................................................................................................................. 136
SRQse-Fall(DQ) ................................................................................................................................... 136
SRQse-Rise(DQ) .................................................................................................................................. 136
tRDPDE ...................................................................................................................................................... 137
tRDSRE ...................................................................................................................................................... 137
tRPRE ........................................................................................................................................................ 137
tRPST ......................................................................................................................................................... 138
DQ measurements ..................................................................................................................................... 139
Slew Rate-Hold-Fall(DQ) ...................................................................................................................... 139
Slew Rate-Hold-Rise(DQ) .................................................................................................................... 139
Slew Rate-Setup-Fall(DQ) .................................................................................................................... 139
Slew Rate-Setup-Rise(DQ) .................................................................................................................. 139
Clock(Diff) measurements .......................................................................................................................... 139
SSC Downspread(CK) ......................................................................................................................... 139
SSC mod Freq(CK) .............................................................................................................................. 140
SSC Profile(CK) ................................................................................................................................... 140
tCH ....................................................................................................................................................... 140
tCK ....................................................................................................................................................... 140
tCL ........................................................................................................................................................ 140
tCH(abs) ............................................................................................................................................... 140
tCH(avg) ............................................................................................................................................... 141
tCK(abs) ............................................................................................................................................... 141
tCK(avg) ............................................................................................................................................... 141
tCL(abs) ................................................................................................................................................ 141
tCL(avg) ................................................................................................................................................ 142
tHP ....................................................................................................................................................... 142
tERR ..................................................................................................................................................... 142
tJIT(cc) ................................................................................................................................................. 143
tJIT(duty) .............................................................................................................................................. 143
tJIT(per) ................................................................................................................................................ 144
VID(ac) ................................................................................................................................................. 144
Input Slew-Diff-Rise(CK) ...................................................................................................................... 144
Input Slew-Diff-Fall(CK) ........................................................................................................................ 144
Clock (Single ended) .................................................................................................................................. 145
AC-Overshoot(CK#) ............................................................................................................................. 145
DDR Analysis Printable Application Help v
Table of Contents
AC-Overshoot(CK) ............................................................................................................................... 145
AC-OvershootArea(CK#) ...................................................................................................................... 145
AC-OvershootArea(CK) ........................................................................................................................ 146
AC-Undershoot(CK#) ........................................................................................................................... 146
AC-Undershoot(CK) ............................................................................................................................. 146
AC-UndershootArea(CK#) .................................................................................................................... 147
AC-UndershootArea(CK) ...................................................................................................................... 147
CKslew-Fall(CK) ................................................................................................................................... 148
CKslew-Fall(CK#) ................................................................................................................................. 148
CKslew-Rise(CK) ................................................................................................................................. 148
CKslew-Rise(CK#) ............................................................................................................................... 148
VIN(CK) ................................................................................................................................................ 148
VIN(CK#) .............................................................................................................................................. 148
Vix(ac)CK ............................................................................................................................................. 148
Vox(ac)CK ............................................................................................................................................ 149
VSWING(MAX)CK# .............................................................................................................................. 149
VSWING(MAX)CK ................................................................................................................................ 149
VSEH(AC)CK ....................................................................................................................................... 149
VSEH(AC)CK# ..................................................................................................................................... 150
VSEH(CK#) .......................................................................................................................................... 150
VSEH(CK) ............................................................................................................................................ 150
VSEL(AC)CK# ...................................................................................................................................... 151
VSEL(AC)CK ........................................................................................................................................ 151
VSEL(CK#) ........................................................................................................................................... 151
VSEL(CK) ............................................................................................................................................. 151
DQS(Single ended) measurements ........................................................................................................... 151
Vix(ac)DQS .......................................................................................................................................... 151
Vox(ac)DQS ......................................................................................................................................... 151
AC-Overshoot(DQS) ............................................................................................................................ 152
AC-Overshoot(DQS#) .......................................................................................................................... 152
AC-OvershootArea(DQS#) ................................................................................................................... 152
AC-OvershootArea(DQS) ..................................................................................................................... 153
AC-Undershoot(DQS) .......................................................................................................................... 153
AC-Undershoot(DQS#) ........................................................................................................................ 153
AC-UndershootArea(DQS#) ................................................................................................................. 154
AC-UndershootArea(DQS) ................................................................................................................... 154
WCK (Diff) .................................................................................................................................................. 155
SSC Downspread(WCK) ...................................................................................................................... 155
SSC mod Freq(WCK) ........................................................................................................................... 155
vi DDR Analysis Printable Application Help
Table of Contents
SSC Profile(WCK) ................................................................................................................................ 155
tDVAC(WCK) ........................................................................................................................................ 155
tWCK .................................................................................................................................................... 155
tWCK-DJ .............................................................................................................................................. 155
tWCKH ................................................................................................................................................. 156
tWCKHP ............................................................................................................................................... 156
tWCKL .................................................................................................................................................. 156
tWCK-Rise-Slew ................................................................................................................................... 156
tWCK-Fall-Slew .................................................................................................................................... 156
tWCK-RJ .............................................................................................................................................. 156
tWCK-TJ ............................................................................................................................................... 156
VWCK-Swing ........................................................................................................................................ 157
WCK (Single ended) .................................................................................................................................. 157
VIN(WCK) ............................................................................................................................................. 157
VIN(WCK#) ........................................................................................................................................... 157
Vix(ac)WCK .......................................................................................................................................... 157
VOL(WCK) ........................................................................................................................................... 157
VOH(WCK) ........................................................................................................................................... 157
VOL(WCK#) ......................................................................................................................................... 158
VOH(WCK#) ......................................................................................................................................... 158
WCKslew-Fall(WCK) ............................................................................................................................ 158
WCKslew-Fall(WCK#) .......................................................................................................................... 158
WCKslew-Rise(WCK) ........................................................................................................................... 158
WCKslew-Rise(WCK#) ......................................................................................................................... 158
Address-Command measurements ........................................................................................................... 159
AC-Overshoot ....................................................................................................................................... 159
AC-OvershootArea ............................................................................................................................... 159
AC-Undershoot ..................................................................................................................................... 160
AC-UndershootArea ............................................................................................................................. 160
Slew Rate-Hold-Fall(Addr-Cmd) ........................................................................................................... 161
Slew Rate-Hold-Rise(Addr-Cmd) ......................................................................................................... 161
Slew Rate-Setup-Fall(Addr-Cmd) ......................................................................................................... 161
Slew Rate-Setup-Rise(Addr-Cmd) ....................................................................................................... 161
tAH ....................................................................................................................................................... 161
tAPW .................................................................................................................................................... 161
tAS ........................................................................................................................................................ 162
tCIPW-High .......................................................................................................................................... 162
tCIPW-Low ........................................................................................................................................... 162
tCMDH .................................................................................................................................................. 162
DDR Analysis Printable Application Help vii
Table of Contents
tCMDPW .............................................................................................................................................. 162
tCMDS .................................................................................................................................................. 162
tIS(base) ............................................................................................................................................... 162
tIH(base) ............................................................................................................................................... 162
tIS(derated) .......................................................................................................................................... 163
tIH(derated) .......................................................................................................................................... 163
tIPW-High ............................................................................................................................................. 163
tIPW-Low .............................................................................................................................................. 163
Refresh ....................................................................................................................................................... 163
tCKSRE ................................................................................................................................................ 163
tCKSRX ................................................................................................................................................ 163
tRFC ..................................................................................................................................................... 164
tREFTR(Read) ..................................................................................................................................... 164
tREFTR(Write) ...................................................................................................................................... 164
tXSNRW ............................................................................................................................................... 164
Power down ............................................................................................................................................... 164
tPD ....................................................................................................................................................... 164
Active ......................................................................................................................................................... 164
tRAS ..................................................................................................................................................... 164
tRC ....................................................................................................................................................... 165
tRCDRD ............................................................................................................................................... 165
tRCDWR ............................................................................................................................................... 165
Precharge ................................................................................................................................................... 166
tPPD ..................................................................................................................................................... 166
tRP(ACT) .............................................................................................................................................. 166
tRP(MRS) ............................................................................................................................................. 166
tRP(REF) .............................................................................................................................................. 167
tRP(SRE) .............................................................................................................................................. 167
tRTPL ................................................................................................................................................... 167
GPIB commands
About the GPIB program ............................................................................................................................ 169
GPIB reference materials ........................................................................................................................... 169
Argument types .......................................................................................................................................... 169
Commands ................................................................................................................................................. 170
DDRA:APPLYBurstconfig ..................................................................................................................... 170
DDRA:ADDALLTerr .............................................................................................................................. 170
DDRA:ADDALLSLewdq ....................................................................................................................... 171
DDRA:ADDALLDiffdqs ......................................................................................................................... 171
viii DDR Analysis Printable Application Help
Table of Contents
DDRA:ADDCMDFLTFile ...................................................................................................................... 172
DDRA: ADVBURSTLevelmode ............................................................................................................ 172
DDRA:ADDALLSEdqs .......................................................................................................................... 173
DDRA:ADDMeas .................................................................................................................................. 173
DDRA:ALTernatethresholds ................................................................................................................. 175
DDRA:AMPBasedmargin ..................................................................................................................... 175
DDRA:BURSTIDMethod ...................................................................................................................... 176
DDRA:BURSTDETectmethod .............................................................................................................. 176
DDRA:BURSTLEngth ........................................................................................................................... 177
DDRA:BURSTLAtency ......................................................................................................................... 177
DDRA:BURSTLevelmode .................................................................................................................... 178
DDRA:BURSTTOlerance ..................................................................................................................... 178
DDRA:BUS ........................................................................................................................................... 179
DDRA:CLKFLTFile ............................................................................................................................... 179
DDRA:CSACTive ................................................................................................................................. 180
DDRA:CLEARALLMeas ....................................................................................................................... 180
DDRA:CSSOUrce ................................................................................................................................ 180
DDRA:CLKBARFLTFile ........................................................................................................................ 181
DDRA:CASMAX ................................................................................................................................... 181
DDRA:CASMIN .................................................................................................................................... 182
DDRA:CSLEvel .................................................................................................................................... 182
DDRA:CSMOde ................................................................................................................................... 182
DDRA:CUSTOMRate ........................................................................................................................... 183
DDRA:DATAHIGH ................................................................................................................................ 183
DDRA:DATALOW ................................................................................................................................ 184
DDRA:DQSBARFLTFile ....................................................................................................................... 184
DDRA:DQSFLTFile .............................................................................................................................. 185
DDRA:DQFLTFile ................................................................................................................................. 185
DDRA:DATAMID .................................................................................................................................. 186
DDRA:DATARate ................................................................................................................................. 186
DDRA:DQDQSLEVELSTAtus? ............................................................................................................ 187
DDRA:FLTtype ..................................................................................................................................... 187
DDRA:GENeration ............................................................................................................................... 187
DDRA:HYSTEREsis ............................................................................................................................. 188
DDRA:HORIzontalscaling .................................................................................................................... 188
DDRA:ISOLBurstlen ............................................................................................................................. 189
DDRA:LASTError? ............................................................................................................................... 189
DDRA:LOGICTrigger ............................................................................................................................ 189
DDRA:MEASType ................................................................................................................................ 190
DDR Analysis Printable Application Help ix
Table of Contents
DDRA:MARGIN .................................................................................................................................... 190
DDRA:POSTamble ............................................................................................................................... 190
DDRA:PREAmbletype .......................................................................................................................... 191
DDRA:PTPeak ..................................................................................................................................... 191
DDRA:RXMASKFile ............................................................................................................................. 191
DDRA:SOURCE:CLOCK ..................................................................................................................... 192
DDRA:SOURCE:STROBE ................................................................................................................... 192
DDRA:SOURCE:DATa ......................................................................................................................... 193
DDRA:SOURCE? ................................................................................................................................. 193
DDRA:SOURCE:CLOCKBar ................................................................................................................ 194
DDRA:SOURCE:STRObebar ............................................................................................................... 194
DDRA:STROBEHIGH .......................................................................................................................... 195
DDRA:STROBEMID ............................................................................................................................. 195
DDRA:STROBELOW ........................................................................................................................... 195
DDRA:SOURCE:WCKBar .................................................................................................................... 196
DDRA:SOURCE:WCK ......................................................................................................................... 196
DDRA:SYMBOLFile ............................................................................................................................. 197
DDRA:THREShold ............................................................................................................................... 197
DDRA:TDQS2DQMode ........................................................................................................................ 198
DDRA:TDQS2DQ ................................................................................................................................. 198
DDRA:TCKAVG ................................................................................................................................... 198
DDRA:TIMGMode ................................................................................................................................ 199
DDRA:TCKAVGMIN ............................................................................................................................. 199
DDRA:VCENTCA ................................................................................................................................. 199
DDRA:VCENTDQ ................................................................................................................................. 200
DDRA:VDD ........................................................................................................................................... 200
DDRA:VDDMode .................................................................................................................................. 201
DDRA:VERTicalscaling ........................................................................................................................ 201
DDRA:VERsion? .................................................................................................................................. 202
DDRA:VIHACMin? ............................................................................................................................... 202
DDRA:VIHDCMin? ............................................................................................................................... 202
DDRA:VILACMax? ............................................................................................................................... 203
DDRA:VILDCMax? ............................................................................................................................... 203
DDRA:VREF ......................................................................................................................................... 203
DDRA:VREFDC? ................................................................................................................................. 204
DDRA:VREFMode ................................................................................................................................ 204
DDRA:WRITEAmpgtread ..................................................................................................................... 204
DDRA:WCKBARFLTFile ...................................................................................................................... 205
DDRA:WCKFLTFile .............................................................................................................................. 205
x DDR Analysis Printable Application Help

Welcome

DDR (Dual Data Rate) is a dominant and fast-growing memory technology. It offers the high data transfer rates needed for virtually all computing applications, from consumer products to the most powerful servers. The high speeds of these signals require high performance measurement tools.
The DDRA application includes compliance measurements as part of our DDR Analysis solution. The DDR Analysis solution enables you to achieve new levels of productivity, efficiency, and measurement reliability. It requires the Jitter and Eye Diagram Analysis tool (Opt. DJA) and the Advanced Search and Mark capability (Opt. ASM).
Some of the DDRA features are:
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Provides debug, analysis, and compliance in one solution for multiple DDR standards such as DDR, DDR2, DDR3, DDR3L, DDR4. LPDDR, LPDDR2, LPDDR3,LPDDR4, GDDR3, and GDDR5.
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Enables analysis of compliance measurements either through the DDRA or DPOJET application for all bursts in an acquisition.
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Differentiates data reads from writes, or analyzes signal integrity on the clock or on a data (DQ) line during Read or Write cycles, or measures Data to Strobe setup and hold during Write cycles.
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Includes limit files to test measurement pass/fail status per standard, speed grades and speed bins. Supports non-standard speed grades.
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Provides both single-ended and differential measurements on Data, Strobe, Clock, Address and Command signals.
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Includes comprehensive measurement statistics.
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Includes sophisticated graphical analysis tools such as Histograms, Time Trends, Spectrums, Bathtub Plots, and Real-Time Eye® diagrams with superimposition of the strobe eye with the data eye.
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Produces consolidated reports automatically with pass/fail information, statistical measurement results, setup information, limits information, waveform path location, plots and user comments, if any.
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Automatically applies signal slew rate derating of measurement limits for Address/Command and data signals.
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Dynamically normalizes limits for clock measurements such as tERR based on the measured tCK(avg).
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Logic state configuration using the DDRA user interface.
DDR
DDR is the DRAM (Dynamic Random Access Memory) technology responsible for increasing data transfer rates to meet high­speed requirements and data capacity of computer systems.
DDR2
DDR2 is the Double Data Rate 2 SDRAM and is widely available in products with data rates up to 1066MT/s.
DDR3
DDR3 DRAM memory is widely available in products and extends data rates to 1600 MT/s and faster rates to come.
DDR3L
DDR3L (low voltage) DRAM memory is widely available in products and extends data rates to 1600 MT/s and faster rates to come.
DDR4
DDR4 DRAM memory is widely available in products and extends data rates to 3200 MT/s and faster rates to come.
DDR Analysis Printable Application Help xi
Welcome
Low Power DDR
LPDDR (Low Power DDR) is a technology for mobile phones and portable computing devices, driven by the need for faster operation with long battery life.
Low Power DDR2
LPDDR2 (Low Power DDR2) is a technology for mobile phones and portable computing devices as it supports advanced power management. Includes a reduced interface voltage of 1.2 V from the 1.8 V specification as compared to LPDDR memory technology. This results in a power consumption reduced by over 50%.
Low Power DDR3
LPDDR3 (Low Power DDR3) is a technology for mobile phones and portable computing devices as it supports advanced power management. Includes a reduced interface voltage of 1.2 V from the 1.8 V specification as compared to LPDDR memory technology. This results in a power consumption reduced by over 50%.
LPDDR4
LPDDR4 (Low Power DDR4) is an emerging technology for mobile phones and portable computing devices as it supports advanced power management. Includes a reduced interface voltage of 1.1 V from the 1.8 V specification as compared to LPDDR memory technology.
Graphic DDR3
GDDR3 (Graphic DDR) offers faster access and is used in graphics-intensive applications such as video cards and gaming systems.
GDDR5
GDDR5 (Graphic DDR) is a type of high performance dynamic random-access graphics card memory designed for applications requiring high bandwidth.
xii DDR Analysis Printable Application Help

Introduction to the application

Related documentation

Tektronix manuals are available at: www.tektronix.com/manuals and www.tektronix.com/software. Use the following table to determine the document that you need:
Table 1: List of reference documents
For information on Refer to
■
Operating the Oscilloscope
■
Software warranty
■
List of available applications
■
Compatible oscilloscopes
■
Relevant software and firmware version numbers
■
Applying a new option key label
■
Installing an application
■
Enabling an application
Oscilloscope user manual. Oscilloscope user online help.
Optional Applications Software on Windows-Based Oscilloscopes Installation Manual, which is provided on the
Optional Applications Software on Windows-Based Oscilloscopes DVD, in the Documents directory.
■
Downloading updates from the Tektronix Web site

Conventions

Online Help uses the following conventions:
■
When steps require a sequence of selections using the application interface, the “>” delimiter marks each transition between a menu and an option. For example, Analyze> DDR Analysis.
■
The terms “DDR application” and “application” refer to DDRA.
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The term “DPOJET application” or “DPOJET” refers to Jitter and Eye Diagram Analysis Tool.
■
The term “oscilloscope” refers to any product on which this application runs.
■
The term “DUT” is an abbreviation for Device Under Test.
■
The term “select” is a generic term that applies to the methods of choosing an option: with a mouse or with the touch screen.
■
User interface screen graphics are taken from a DPO7000 series oscilloscope.
You can find a PDF (portable document format) file for this document in the Documents directory on the Optional Applications Software on Windows-Based Oscilloscopes DVD. The DVD booklet contains information on installing the application from the DVD and on how to apply a new label.
DDR Analysis Printable Application Help
1
Introduction to the application
Table 2: Icon descriptions
Icon Meaning
This icon identifies important information.
This icon identifies conditions or practices that could result in loss of data.
This icon identifies additional information that will help you use the application more efficiently.

Technical support

Tektronix welcomes your comments about products and services. Contact Tektronix through mail, telephone, or the Web site. Click Contacting Tektronix for more information. Tektronix also welcomes your feedback. Click Customer feedback for suggestions for providing feedback to Tektronix.

Customer feedback

Tektronix values your feedback on our products. To help us serve you better, please send us your suggestions, ideas, or other comments you may have regarding the application or oscilloscope.
Direct your feedback via e-mail to
techsupport@tektronix.com
Or FAX at (503) 627-5695, and include the following information:
General Information
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Oscilloscope series (for example: DPO7000C or DSA/DPO/MSO70000C/D/DX series) and hardware options, if any.
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Software version number.
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Probes used.
Application-specific Information
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Description of the problem such that technical support can duplicate the problem.
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If possible, save the oscilloscope and application setup files as .set and associated .xml files.
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If possible, save the waveform on which you are performing the measurement as a .wfm file.
Once you have gathered this information, you can contact technical support by phone or through e-mail. In the subject field, please indicate “DDRA Problem” and attach the .set, .xml and .wfm files to your e-mail. If there is any query related to the actual measurement results, then you can generate a .mht report and send it. If you need to send very large files, technical support can assist you to transfer the files via ftp (file transfer protocol).
The following items are important, but optional:
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Your name
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Your company
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Your mailing address
2 DDR Analysis Printable Application Help
Introduction to the application
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Your phone number
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Your FAX number
Enter your suggestion. Please be as specific as possible.
Please indicate if you would like to be contacted by Tektronix regarding your suggestion or comments.
DDR Analysis Printable Application Help 3
Introduction to the application
4 DDR Analysis Printable Application Help

Getting started

Product description

DDR Analysis is a standard specific solution tool for Tektronix Performance Digital Oscilloscopes (DPO7000C or DSA/DPO/ MSO70000C/D/DX series). DDR Analysis requires Jitter and Eye Diagram Analysis Tool (Opt.DJA) and the advanced Search and Mark capability (Opt. ASM).
The features of DDRA are:
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Provides debug, analysis, and compliance in one solution for multiple DDR standards such as DDR, DDR2, DDR3, DDR3L, DDR4. LPDDR, LPDDR2, LPDDR3, LPDDR4,GDDR3, and GDDR5.
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Identifies Read and/or Write operations automatically.
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Custom data rates and input levels to tailor DDRA Read and/or Write burst identification.
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Provides both single-ended and differential measurements on Data, Strobe, Clock, Address and Command signals.
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Analyze compliance measurements either through DDRA or Jitter and Eye Diagram Analysis Tool.
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Limit files to test measurement pass/fail status.
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Automatically applies signal slew rate derating of measurement limits for Address/Command and data signals.
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Preferences shortcut available for all DDRA steps. For more details, refer to the DPOJET online help.
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Logic state configuration using the DDRA user interface.
DDR
DDR is the DRAM (Dynamic Random Access Memory) technology responsible for increasing data transfer rates to meet high­speed requirements and data capacity of computer systems.
DDR2
DDR2 is the Double Data Rate 2 SDRAM and is widely available in products with data rates up to 1066MT/s.
DDR3
DDR3 DRAM memory is widely available in products and extends data rates to 1600 MT/s and faster rates to come.
DDR3L
DDR3L (low voltage) DRAM memory is widely available in products and extends data rates to 1600 MT/s and faster rates to come.
DDR4
DDR4 DRAM memory is widely available in products and extends data rates to 3200 MT/s and faster rates to come.
Low Power DDR
LPDDR (Low Power DDR) is an emerging technology for mobile phones and portable computing devices, driven by the need for faster operation with long battery life.
Low Power DDR2
LPDDR (Low Power DDR) is an emerging technology for mobile phones and portable computing devices, driven by the need for faster operation with long battery life.
DDR Analysis Printable Application Help 5
Getting started
Low Power DDR3
LPDDR3 (Low Power DDR3) is a technology for mobile phones and portable computing devices as it supports advanced power management. Includes a reduced interface voltage of 1.2 V from the 1.8 V specification as compared to LPDDR memory technology. This results in a power consumption reduced by over 50%.
Low Power DDR4
LPDDR4 (Low Power DDR4) is an emerging technology for mobile phones and portable computing devices as it supports advanced power management. Includes a reduced interface voltage of 1.1 V from 1.8 V specification as compared to LPDDR memory technology.
Graphic DDR3
GDDR3 (Graphic DDR) offers faster access and is used in graphics-intensive applications such as video cards and gaming systems.
GDDR5
GDDR5 (Graphic DDR) is a type of high performance dynamic random-access graphics card memory designed fro applications requiring high bandwidth.

DDRA prerequisites

To use the DDRA application on instruments using 64-bit operating systems, you need DPOJET Advanced (Opt. DJA) enabled.

Requirements and restrictions

DPOJET (DJA) is required to operate DDRA on your oscilloscope. Also refer to subsequent requirements for DPOJET.

Supported probes

The application supports the following probes:
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TAP2500
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TAP1500
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TCP0030
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P6158
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P6101B
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P6246
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P6247 (DPO7254 only)
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P6248 (DPO7254 only)
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P6249
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P6150
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P6158
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P7240
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P7260
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P7330
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P7340A
6 DDR Analysis Printable Application Help
Getting started
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P7350
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P7360A
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P7380A
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P7313A
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P7513
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P7520A
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P7520
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P7500 Series TriMode

Installing the application

Refer to the Optional Applications Software on Windows-Based Oscilloscopes Installation Manual for the following information:
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Software warranty.
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List of available applications, compatible oscilloscopes, and relevant software and firmware version numbers.
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Applying a new option installation key label.
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Installing an application.
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Enabling an application.
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Downloading updates from the Tektronix Web site.
You can find a PDF (portable document format) file for this document in the Documents directory on the Optional Applications Software on Windows-Based Oscilloscopes DVD. The DVD booklet contains information on how to install the application from the DVD and on how to apply a new option installation key label.
DDR Analysis Printable Application Help 7
Getting started

About DDRA

Click Help > About DPOJET to view DDRA application details such as the software released version number, application name and copyright.
NOTE. The version displayed above is indicative only, the version number displayed will vary depending upon the exact version of the application installed.
8 DDR Analysis Printable Application Help

Operating basics

About basic operations

Starting the application

On the oscilloscope menu bar, click Analyze > DDR Analysis to open the application.

Menu controls

Table 3: Application Menu Controls descriptions
Item Description
Tab Shortcut to a menu in the menu bar or a category of menu options; most tabs are short cuts.
Area Visual frame with a set of related options.
Option button Button that defines a particular command or task.
Field Box that you can use to type in text, or to enter a value with the Keypad or a Multipurpose knob.
Check Boxes Use to select configuration options or clear preferences.
Browse Displays a window where you can look through a list of directories and files.
Command button
Virtual Keypad icon
MP knob references (a or b)
Button that initiates an immediate action such as Run command button in the control panel.
Click to use on-screen keypad to enter alphanumeric values.
Identifiers that show which Multi Purpose Knob (MPK) may be used as an alternate means to control a parameter; turn the knob on the oscilloscope front panel to adjust the corresponding parameter. Also, the value can be entered directly on the MPK display component.

Virtual keypad

Select the
icon and use the virtual keypad to enter alphanumeric values, such as reference voltage levels.
DDR Analysis Printable Application Help 9
Operating basics

Tips on the DDRA user interface

Here are some tips to help you with the application user interface:
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Use the Single button to obtain a set of measurements from a single new waveform acquisition. Pushing the button again before process is completed will interrupt the processing cycle.
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Use the Run button
to continuously acquire and accumulate measurements. If prior measurements have been acquired and have not been cleared, the new measurement are added to the existing set. Push the button again to interrupt the current acquisition.
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Use the Recalc button to perform measurements on the waveform currently displayed on the oscilloscope without performing a new acquisition. This is useful if you wish to modify a configuration parameter and re-run the measurements on the current waveform.
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Use the Clear button to clear all existing measurement results. Note that adding or deleting a measurement, or changing a configuration parameter of an existing measurement, will also cause measurements to be cleared. This is to prevent the accumulation of measurement statistics or sets of statistics that are not coherent.
10 DDR Analysis Printable Application Help
Operating basics

Basic oscilloscope functions

Application directories

The installation directory for DDRA executable files is C:\TekApplications\DDRA for oscilloscope running with Windows and C:\Users\Public\Tektronix\TekApplications\DDRA for oscilloscopes running with Windows7 operating system. During installation, the application sets up a limits folder in the user directory. This folder contains limit files for various DDR standards and speed grades.
For 64-bit systems, the DDRA installer copies the symbol files into the following location: C:\Users\Public\Tektronix
\TekScope\BusDecodeTables\DDR. This is different from the default TekScope location at C:\Users\[Username] \Tektronix\Tekscope\BusDecodeTables.

File name extensions

Table 4: File name extensions
File Extension Description
.csv An ascii file containing Comma Separated Values. This file format may be read by any ascii text
editor (such as Notepad) or may be imported into spreadsheets such as Excel.
.xml An ascii file containing measurement setup information, limits or other data in Extensible
Markup Language.
.set A binary file containing oscilloscope setup information in a proprietary format.
.mht An HTML archive file, compatible with common Windows applications; contains the full report,
including text and graphics.
.wfm A binary file containing an oscilloscope waveform record in a recallable, proprietary format.
.tsf A symbol file containing various symbols for various logic trigger patterns.
.chm, .pdf Help manuals.

Returning to the application

When you access oscilloscope functions, the DDRA control windows may be replaced by the oscilloscope control windows or by the oscilloscope graticule. You can access oscilloscope functions in the following ways:
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From the menu bar on the oscilloscope, choose Analyze > DDR Analysis.
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Alternatively, you can switch between recently used control panels using the forward or backward arrows corner of the control panel.
on the right

Control panel

The Control Panel appears on the right of the application window. Using this panel, you can start or stop the sequence of processes for the application and the oscilloscope to acquire information from the waveform. The controls are Clear, Recalc, Single, and Run. The following table describes each of these controls:
Item Description
Clear Clears the current result display and resets any statistical results and autoset ref levels. For any
input sources that have reference level autoset enabled, clears the current ref levels so that they will be recalculated during the next acquisition.
Recalc Runs the selected measurements on the currently displayed waveform(s), without first
performing a new acquisition.
DDR Analysis Printable Application Help 11
Operating basics
Item Description
Single Initiates a single new acquisition and runs the selected measurements.
Run Initiates new acquisitions and runs the selected measurements repeatedly until Stop is clicked.
For any non-live sources (Reference waveforms or Math waveforms not dependent on a live
channel), only a single processing cycle will occur.
Show Plots Displays the plot summary window when clicked. This button appears in the control panel only
when one or more plots have been defined.
Advanced Setup DPOJET
Transitions to the Jitter and Eye Diagram Analysis application when clicked, importing all
currently defined DDRA measurements. This button appears in the control panel when you
open the DDR analysis application. This is useful if you wish to add additional measurements
not defined in DDRA, or wish to change measurement configurations to intentionally deviate
from those recommended by DDRA.

Saving and recalling setups

Saving a setup

The DDRA application state is automatically saved along with the oscilloscope state. To save the oscilloscope settings and the application state, follow these steps:
1. Click File > Save As > Setup.
2. In the file browser, select the directory to save the setup file.
3. Select or enter a file name. The application appends *_DDRA.xml and *_DPOJET.xml to store the DDR setup, and
*.set to store the oscilloscope settings.
4. Click Save.
NOTE. After the oscilloscope application is started, DDRA needs to be launched at least once before any saved DDRA configuration can be recalled.

Recalling a saved setup

To recall a previously saved set of application and oscilloscope settings, do the following steps:
NOTE. While recalling setup files with both DDRA and DPOJET saved settings, DDRA setup values get a higher precedence over DPOJET setup values. For example: Select a DPOJET measurement and a DDRA measurement, change the ref levels of DPOJET measurement and save the setup file. On recalling the setup file, you will see that the DPOJET ref level settings are overwritten by the DDRA measurement ref levels.
1. Click File > Recall.
2. Click Setup in the left column if it is not already selected.
3. Select the directory in the file browser from which you wish to recall the setup file.
4. Select a .set file and click Recall.
NOTE. Only .set files can be selected for recall; any corresponding *_DDRA.xml and *_DPOJET.xml file in the same directory will be recalled as well, if DDRA has been launched at least once since the oscilloscope application was started. If DDRA has not been launched at least once, the oscilloscope settings will be recalled but the DDRA configuration will be ignored.
12 DDR Analysis Printable Application Help
Operating basics

Recalling the default setup

To recall the default application and oscilloscope settings, click File > Recall Default Setup.
NOTE. Recalling default setup sets the DDRA application to DDR3 generation and data rate, None.

Search and mark

The data rate, generation, and measurement type selected in DDRA are also set in Advanced Search and Mark (ASM). Marks are available only for Read and Write bursts measurement type. You can configure Search using Advance > Search > Configure. The identified bursts are shown as small inverted marks ( ) in the oscilloscope display area. Each pair of marks specifies the start and stop of a burst. You can traverse from one mark to the other using the Mark Control window.
NOTE. LPDDR4 burst cannot be configured from ASM window.
DDR Analysis Printable Application Help 13
Operating basics

Limits

A limits file allows you to configure the limits used to determine Pass or Fail status for tests. Each limits file includes a list of one or more measurements, and the ranges of acceptable values for any or all statistics for each measurement that include combinations of all measurements and statistical characteristics, and an appropriate range of values for each combination.
The application provides preconfigured limits files for many combinations of standards and speed grades. You can create one by specifying limits for any of the result parameters such as Mean, Std Dev, Max, Min, peak-to-peak, population, MaxPosDelta and MinPosDelta. For each of these result parameters, you can specify the Upper Limit Equality (ULE), Lower Limit Equality (LLE), or Both. The measurement names in the limits file must be entered as mentioned in About DDR Analysis.
To include Pass/Fail status in the result statistics, you can create a custom limits file in the following format using an XML editor or any other editor. If the file is created in any other editor such as Notepad, it should be saved in Unicode format.
The following is a sample of the limit file for DDR2 generation, the data rate being 667 MHz
<?xml version="1.0" encoding="utf-16" ?>
<Main>
<Measurement>
<NAME>DDR Hold–Diff</NAME>
<STATS>
<STATS_NAME>Min</STATS_NAME>
<LIMIT>BOTH</LIMIT>
<ULE>175e-12</ULE>
<LLE>0</LLE>
</STATS>
<Measurement>
<NAME>tDH-Diff(base)</NAME>
<STATS>
<STATS_NAME>Min</STATS_NAME>
<LIMIT>BOTH</LIMIT>
<ULE>175e-12</ULE>
<LLE>0</LLE>
</STATS>
</Measurement>
</Main>
You can find limit files for various data rates of different DDR standards and speed bins at C:\Users\Public\Tektronix
\TekApplications\DDRA\Limits.
NOTE. Base limit values change based on the selected AC configuration at Step6 . For DDR3 1333 MT/s and 1600 MT/s, AC 150 ref level are applied independent of the specified AC config.
14 DDR Analysis Printable Application Help
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