Pcm Interface; Definitions Of Pins; Configuration Modes; Pcm Working Mode - Huawei MU509 Series Design Manual

HUAWEI LGA Module PCM Audio Design Guide

2.1 Definitions of Pins

Definitions of pins on the PCM interface of Huawei LGA module is as shown in Table
2-1 .
Table 2-1 Definitions of pins on the PCM interface
Pin No.
5
6
7
8

2.2 Configuration Modes

2.2.1 PCM Working Mode

Huawei LGA module supports three PCM working modes, including MASTER_PRIM
mode, MASTER_AUX mode and SLAVE mode.
Issue 04 (2016-12-12)
Pin Name
Normal
PCM_SYNC
PCM_DIN
PCM_DOUT
PCM_CLK
 When Huawei LGA module works on the master mode, PCM_CLK and PCM_SYNC pins
are in the output status; when it works on the slave mode, PCM_CLK and PCM_SYNC pins
are in the input status.
Each module has two editions: Data only or Telematics. Data only does not support the

PCM function.
Following configurations in section 2.2 , except PCM data polarity, can be modified by

AT^CPCM command.
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2
I/O
MUX
GPIO I/O
GPIO I
GPIO O
GPIO I/O

PCM Interface

PCM Interface
Description
PCM interface sync
PCM I/F data in
PCM I/F data out
PCM interface clock
6