Figure 9-18 Flash Memory Circuit Diagram 4 - Huawei U8815 Maintenance Manual

U8815
Maintenance Manual

Figure 9-18 Flash memory circuit diagram 4

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The MSM7227A is able to visit the LPDDR2 through two high-speed buses EBI1. The
LPDDR2 is connected to the MSM8255-0 in PoP (Package-on-package) mode. Meanwhile,
the MSM7227A can also visit the external storage eMMC through a low-speed bus (EBI2), as
shown in the following figure.
Figure 9-19 shows the analysis of the U8815 memory interface.
Issue 1.0 (2012-02-13)
Analysis
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9 Principles and Failure Analysis
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