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Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide
43
Setting up the W4641A Interposer
5
Step 3 - Connecting the U4208A and U4209A Probe Cables to a U4164A Logic Analyzer
In a W6601A interposer setup, you connect the U4208A and U4209A probe cable pods to U4164A
logic analyzer pods as per the mapping shown in the table below.
The mapping of the U4208A and U4209A probe cable pods and logic analyzer pods is also illustrated
with the help of the following diagram.
Figure 13
Connections between U4208A and U4209A probe cables and Logic Analyzer pods
Logic Analyzer Channels to Signals Mapping
When you connect the U4208A and U4209A probe cables to a U4164A Logic Analyzer as per the
, the logic analyzer channels are mapped to DDR4 signals as per the
table displayed below.
These signals are automatically configured when you load one of the configuration files supplied with
the Keysight B4661A LPDDR decoder software.
Probe Cable Pods
U4164A Logic Analyzer
Pods
U4209A Cable Pods
Pod A
Pod 7
Pod B
Pod 1
U4208A Cable Pods
Pod A
Pod 3
Pod B
Pod 5
NOTE
In a dual-sampled setup, the U4164A logic analyzer samples data twice per clock edge. Two
thresholds are used with one sample taken per threshold. For LPDDR systems running less
than 2.5GHz, the dual sampling allows separate thresholds and separate sample positions to
be specified for DDR Reads and Writes.
In a quad-sampled setup, four samples are taken per clock edge. Two thresholds are used
with two samples taken per threshold.
Содержание LPDDR4
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