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QPHY-DDR2 Software Option
QPHY-DDR2-OM-E Rev
A
3
Table of Contents
INTRODUCTION TO QPHY-DDR2 ............................................................................................ 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 DDR2 ........................................................................................................ 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-DDR2 Software using QualiPHY ........................................................................................... 14
Customizing QualiPHY ............................................................................................................................................. 16
QPHY-DDR2 Operation............................................................................................................................................ 18
DDR2 MEASUREMENT PREPARATION ............................................................................... 19
Differential Probe Deskew Procedure using TF-DSQ .............................................................................................. 19
Differential Probe Deskew Procedure on Zi oscilloscopes using PCF200 .............................................................. 19
PCF200 Fixture Overview ................................................................................................................................. 21
Probe Connection to PCF200 ........................................................................................................................... 21
Probe Calibration Menu .................................................................................................................................... 22
Probe ............................................................................................................................................................................. 23
Full Calibration Button .................................................................................................................................................... 23
Gain & Offset.................................................................................................................................................................. 23
Skew .............................................................................................................................................................................. 24
Clear .............................................................................................................................................................................. 24
Calibration Source .......................................................................................................................................................... 24
Calibration Skew Reference ........................................................................................................................................... 24
Recall Calibration ........................................................................................................................................................... 24
Advanced Mode Checkbox ............................................................................................................................................ 24
Advanced Mode Probe Calibration Menu ......................................................................................................... 24
Gain/Offset Only ............................................................................................................................................................. 25
Deskew Only .................................................................................................................................................................. 25
The Advanced Menu ......................................................................................................................................... 25
Rise Time Skew Correction ............................................................................................................................................ 25
Differential (or Single-Ended) Probe Selection ............................................................................................................... 26
Deskew All (or Common Skew)...................................................................................................................................... 26
Common Mode Voltage Selection .................................................................................................................................. 26
Advanced Probe Calibration ............................................................................................................................. 26
D620 Probe Calibration Procedure ................................................................................................................... 26
QPHY-DDR2 TEST CONFIGURATIONS ................................................................................ 27
1) Clock tests DDR2-667 (1 Probe) ......................................................................................................................... 27
2) CKdiff-DQse-DQSdiff 667 Write Burst (3 probes) ................................................................................................ 27
3) CKdiff-DQse-DQSdiff 667 Read Burst (3 probes) ............................................................................................... 28
4) Eye Diagram (3 Probes Debug) ........................................................................................................................... 28
5) All tests that require 4 Probes .............................................................................................................................. 28
