Teledyne LeCroy QPHY-LPDDR2 - Manual (Page 3)

QPHY-LPDDR2 Software Option
QPHY-LPDDR2-OM-G Rev B
3
Table of Contents
INTRODUCTION TO QPHY-LPDDR2 ....................................................................................... 7
Required equipment ................................................................................................................................................... 7
SIGNALS MEASURED .............................................................................................................. 7
CK, CK# Input ............................................................................................................................................................ 7
DQ Input/Output ......................................................................................................................................................... 7
DQS, DQS# Input/Output ........................................................................................................................................... 7
ADD/CTRL ................................................................................................................................................................. 7
BASIC FUNCTIONALITY .......................................................................................................... 7
Burst Read ................................................................................................................................................................. 8
Burst Write .................................................................................................................................................................. 9
USING QUALIPHY LPDDR2 ................................................................................................... 10
QUALIPHY COMPLIANCE TEST PLATFORM ....................................................................... 11
Oscilloscope Option Key Installation ........................................................................................................................ 13
Typical (Recommended) Configuration .................................................................................................................... 13
Remote (Network) Configuration ............................................................................................................................. 13
Oscilloscope Selection ............................................................................................................................................. 13
Accessing the QPHY-LPDDR2 Software using QualiPHY ....................................................................................... 14
Customizing QualiPHY ............................................................................................................................................. 17
QPHY-LPDDR2 Operation ....................................................................................................................................... 20
LPDDR2 MEASUREMENT PREPARATION ........................................................................... 21
Differential Probe Deskew Procedure using TF-DSQ .............................................................................................. 21
Differential Probe Deskew Procedure on Zi oscilloscopes using PCF200 .............................................................. 21
PCF200 Fixture Overview ................................................................................................................................. 23
Probe Connection to PCF200 ........................................................................................................................... 23
Probe Calibration Menu .................................................................................................................................... 24
Probe ............................................................................................................................................................................. 25
Full Calibration Button .................................................................................................................................................... 25
Gain & Offset.................................................................................................................................................................. 25
Skew .............................................................................................................................................................................. 26
Clear .............................................................................................................................................................................. 26
Calibration Source .......................................................................................................................................................... 26
Calibration Skew Reference ........................................................................................................................................... 26
Recall Calibration ........................................................................................................................................................... 26
Advanced Mode Checkbox ............................................................................................................................................ 26
Advanced Mode Probe Calibration Menu ......................................................................................................... 26
Gain/Offset Only ............................................................................................................................................................. 28
Deskew Only .................................................................................................................................................................. 28
The Advanced Menu ......................................................................................................................................... 28
Rise Time Skew Correction ............................................................................................................................................ 28
Differential (or Single-Ended) Probe Selection ............................................................................................................... 29
Deskew All (or Common Skew)...................................................................................................................................... 29
Common Mode Voltage Selection .................................................................................................................................. 29
Advanced Probe Calibration ............................................................................................................................. 29
D620 Probe Calibration Procedure ................................................................................................................... 29
QPHY-LPDDR2 TEST CONFIGURATIONS ............................................................................ 31
1) Clock tests LPDDR2-667 (1 Probe) ..................................................................................................................... 31
2) CKdiff-DQse-DQSdiff 667 (3 probes) ................................................................................................................... 31
3) 4 Probe tests ........................................................................................................................................................ 32