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M80 EVB User Guide

M80_EVB_UGD_V1.2 - 19 -

Module

PCM

interface

Audio codec

PCM

interface

Analog

audio

RJ11

Figure 15: Block diagram of PCM

Figure 16: Pins of PCM interface

Table 6: Pins of PCM channel

Signal

I/O

Description

Note

MICN

Negative microphone input

SPKN

Negative receiver output

SPKP

Positive receiver output

MICP

Positive microphone input

The test points of PCM interface have been reserved as below. Customer can measure PCM signal

using these test points.

Quectel

Confidential

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Sim2 M80 Guida Utente Pagina 20