Huawei MU509 - PCM Interface Design Guide; Analog Interface Design Guide

HUAWEI 30 mm × 30 mm LGA Module
Hardware Migration Guide
LGA Interface Differences
Issue 08 (2016-12-12)
HUAWEI Proprietary and Confidential
Copyright © HUAWEI Technologies Co., Ltd.
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2.3.2 PCM Interface Design Guide
Please note that the different signal level of PCM between MU509/MC509 and
ME209u-526/ME909u/MU709/ME909s. The signal of MU509 and MC509 is CMOS
2.6 V and ME209u-526, MU709, ME909u and ME909s are CMOS 1.8 V. Therefore,
you must consider compatibility during circuit designing.
Figure 2-11 The recommended connection of the PCM interface in the LGA module

PCM_SYNC: Output when PCM is in master mode.

PCM_CLK: Output when PCM is in master mode.

MU709 and ME909s support both master and slave mode; MC509, MU509 and ME909u-
521 only support master mode.

The firmware of ME909u-523 and ME209u-526 does not support PCM function yet.

It is recommended that a TVS be used on the related interface, to prevent electrostatic
discharge and protect integrated circuit (IC) components.
2.3.3 Analog Interface Design Guide
The ME209u-526, MU709, ME909u and ME909s module do not support the analog
audio interface.
MU509 and MC509 module support two channels MIC: one channel EAR and one
channel SPEAKER.