Huawei ME909s Series Hardware Manual page 30

HUAWEI ME909s Series LTE Mini PCIe Module
Hardware Guide
Figure 3-14 Circuit diagram of the interface of the PCM (ME909s Mini PCIe module is
used as PCM master)
Figure 3-15 Circuit diagram of the interface of the PCM (ME909s Mini PCIe module is
used as PCM slave)
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Issue 02 (2016-09-07)
The signal level of CODEC must match that of the module.
ME909s Mini PCIe module supports both master and slave mode.
PCM_SYNC: Output when PCM is in master mode; Input when PCM is in slave mode.
PCM_CLK: Output when PCM is in master mode; Input when PCM is in slave mode.
It is recommended that a TVS be used on the related interface, to prevent electrostatic
discharge and protect integrated circuit (IC) components.
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Description of the Application Interfaces
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