Keysight LPDDR4, Руководство по установке

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Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 23
Introduction to W6602A LPDDR4 BGA Interposer 3
The following figure shows a W6602A interposer’s top view.
Figure 7 W6602A Interposer
The W6602A interposer has two connectorless footprints, J1 and J2 on its top side. A retention
module (shipped with the U4207A Soft Touch Pro probe) is soldered to each footprint. Each retention
module attaches to a U4207A probe. These probes are then connected to the Logic Analyzer
module’s pods.
Software Configurations
The W6602A interposer can be used in the following seven logic analyzer software configurations:
• 10 GHz Timing mode
• CHA State mode 16 DQ under 2500MT/s (double edge clocking)
• CHA State mode 16 DQ over 2500MT/s (single edge clocking)
• CHA State mode 32 DQ under 2500MT/s (double edge clocking)
• CHA State mode 32 DQ over 2500MT/s (single edge clocking)
• CHB State mode 16 DQ under 2500MT/s (double edge clocking)
• CHB State mode 16 DQ over 2500MT/s (single edge clocking)
This interposer effectively utilizes the single touch probing and quad sampling features of the
U4164A logic analyzer module thereby allowing you to probe LPDDR4 DQ signals above 2.5Gb/s
without double probe load. (In quad sampling, four samples are captured per clock edge at two
different thresholds. Two samples are taken at each threshold.) The Quad Sample State mode is only
available with the U4164A-02G licensed speed grade option.
For probing signals under 2.5Gb/s, you can use the W6602A interposer with the U4164A module’s
dual clock edge clocking and dual sample mode instead of the quad sample mode. Dual Sample
state mode supports data rates on LPDDR4 up to 2500MT/s and is available with the U4164A-01G
licensed speed grade option. The U4164A-02G licensed option supports all modes of operation and
the highest data rates.
J1 and J2 footprints to attach the interposer to U4207A
probes using retention modules
Pin 1
Marking