Teledyne-lecroy QPHY-LPDDR2 Manuale Utente

QPHY-LPDDR2 LP-DDR2 Serial Data Operator’s Manual Revision B – July, 2011 Relating to the Following Release Versions: • Software Option Rev.

10 QPHY-LPDDR2-OM-G Rev B Figure 5. Burst write followed by burst read [JESD209-2D-2E figure 44] USING QUALIPHY LPDDR2 QualiPHY LPDDR2 guides the

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 11 QUALIPHY COMPLIANCE TEST PLATFORM QualiPHY is LeCroy’s compliance test framework which leads th

12 QPHY-LPDDR2-OM-G Rev B See the QualiPHY Operator’s Manual for more information on how to use the QualiPHY framework. Figure 7. The Test Report

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 13 Oscilloscope Option Key Installation An option key must be purchased to enable the QPHY-LPDDR2

14 QPHY-LPDDR2-OM-G Rev B QualiPHY tests the oscilloscope connection after clicking the Start button. The system prompts you if there

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 15 Figure 8. QualiPHY main menu and compliance test Standard selection menu

16 QPHY-LPDDR2-OM-G Rev B 4. Click the Configuration button in the QualiPHY main menu: 5. Select a configuration from the pop-up menu: Figure 9

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 17 Customizing QualiPHY The predefined configurations in the Configuration screen cannot be modifi

18 QPHY-LPDDR2-OM-G Rev B Figure 10. QualiPHY test item selection menu

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 19 Once a custom configuration is defined, script variables and the test limits can be changed by

2 QPHY-LPDDR2-OM-G Rev B LeCroy Corporation 700 Chestnut Ridge Road Chestnut Ridge, NY 10977–6499 Tel: (845) 578 6020, Fax: (845) 578 5985 Interne

20 QPHY-LPDDR2-OM-G Rev B QPHY-LPDDR2 Operation After pressing Start in the QualiPHY menu, the software instructs how to set up the t

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 21 LPDDR2 MEASUREMENT PREPARATION Before starting any test or data acquisition, the oscilloscope

22 QPHY-LPDDR2-OM-G Rev B PCF200 Fixture Overview • Probe Connection to PCF200 • Probe Calibration Menu • D620 Probe Calibration Advanced mode i

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 23 PCF200 Fixture Overview Major components of the PCF200 fixture are shown in the following figur

24 QPHY-LPDDR2-OM-G Rev B Probes are connected electrically in a single-ended arrangement: the positive (+) side of the probe must be connected to

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 25 Figure 17. Basic Probes Calibration menu The information in the probe calibration menu is orga

26 QPHY-LPDDR2-OM-G Rev B Note: It is important to note that some passive probes, and any user-designed probes, do not provide proper probe identif

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 27 Figure 18. Advanced Mode Probe Calibration menu

28 QPHY-LPDDR2-OM-G Rev B Checking this box allows:  Calibration of gain/offset only  Calibration of deskew only  Access to the advanced menu (s

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 29 Differential (or Single-Ended) Probe Selection The PCF200 fixture calibrates probes differentia

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 3 Table of Contents INTRODUCTION TO QPHY-LPDDR2 ...

30 QPHY-LPDDR2-OM-G Rev B Now you are ready to probe the circuit and perform your measurements. If power is interrupted during your measurements, r

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 31 QPHY-LPDDR2 TEST CONFIGURATIONS Configurations include variable settings and limit sets as well

32 QPHY-LPDDR2-OM-G Rev B • tRPST • tDIPW • tQSH • tQSL • tQHP • tQHS for DQx • tDQSCK • tVAC for DQx • tDS/tDH (vref based) • tHZ(DQ) •

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 33 • Write slew rate of rising and falling edge for CLK+/-, DQSx+/- and DQx • VIX for CLK +/- an

34 QPHY-LPDDR2-OM-G Rev B D2) Demo of Eye Diagram (Debug) This configuration uses the saved waveforms found in the D:\Waveforms\LPDDR2 folder and r

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 35 QPHY-LPDDR2 VARIABLES General Variables The following variables are used by all configurations.

36 QPHY-LPDDR2-OM-G Rev B Define format used to set trace names Stores a saved waveform naming format or convention The choices are LeCroy or Dialo

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 37 Select Signal Under Test if many These variables allow the user to specify which signals to tes

38 QPHY-LPDDR2-OM-G Rev B QPHY-LPDDR2 LIMIT SETS LPDDR2-466 This corresponds to the JEDEC JESD209-2D LPDDR2 standard specification limits for 466 M

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 39 tCH(avg), Average High Pulse Width tCH(avg) is defined as the average high pulse width, as calc

4 QPHY-LPDDR2-OM-G Rev B D2) Demo of Eye Diagram (Debug) ...

40 QPHY-LPDDR2-OM-G Rev B tJIT(duty), Half Period Jitter tJIT(per), Clock Period Jitter tJIT(per) is defined as the largest deviation of any sing

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 41 n = 2 for tERR(2per) n = 3 for tERR(3per) n = 4 for tERR(4per) n = 5 for tERR(5per) (and so fo

42 QPHY-LPDDR2-OM-G Rev B The lowest number must be greater than or equal to the minimum limit and the highest number must be less than or equal to

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 43 AC Undershoot, Maximum peak amplitude Maximum peak amplitude allowed for undershoot area. Fi

44 QPHY-LPDDR2-OM-G Rev B Figure 24. Data output (read) timing [JESD208-2B figure 23] tQHS, DQ hold skew factor This measures DQ at VIH(dc) or V

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 45 tHZ(DQ), DQ High Impedance Time From CK/CK# This is the time from Vref of the CK/CK# signal to

46 QPHY-LPDDR2-OM-G Rev B Write Bursts tDQSS, DQS latching rising transitions to associated CK edge CK rising edge at VREF level to DQS rising edge

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 47 tDSS, DQS Falling Edge to CK Setup Time Time from DQS falling edge at VREF level to CK rising

48 QPHY-LPDDR2-OM-G Rev B Figure 27. Slew Rate [JESD209-2D figure 124] DQS and DQS# signals must be monotonic between VIL(dc)max and VIH(dc)min. H

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 49 Figure 28. reference table for tIS tIH [JESD209-2D table 104] Setup (tIS) nominal slew rate fo

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 5 Slew Rate ...

6 QPHY-LPDDR2-OM-G Rev B Figure 17. Basic Probes Calibration menu ...

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 7 INTRODUCTION TO QPHY-LPDDR2 QPHY-LPDDR2 is an automated test package performing all of the real

8 QPHY-LPDDR2-OM-G Rev B Burst Read The Burst Read command is initiated by having CS_n LOW, CA0 HIGH, CA1 LOW and CA2 HIGH at the rising edge of th

QPHY-LPDDR2 Software Option QPHY-LPDDR2-OM-G Rev B 9 BL/2 + 1 - WL clock cycles. Note that if a read burst is truncated with a Burst Terminate (BST)