HUAWEI ME909s Series LTE Mini PCIe Module
Hardware Guide
Description of the Application Interfaces
Issue 02 (2016-09-07)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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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)
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.