Sim2 M80 Uživatelská příručka stáhnout pdf (Strana 17)

M80 EVB User Guide

M80_EVB_UGD_V1.2 - 16 -

Table 3: Pins of AIN2/AOUT2

Signal

I/O

Description

Note

2_1

MIC2N

Negative microphone input

2_2

AGND

AGND of audio circuits

2_3

SPK2P

Positive receiver output

2_4

MIC2P

Positive microphone input

Table 4: Pins of AIN1/AOUT1

Signal

I/O

Description

Note

1_1

MIC1N

Negative microphone input

1_2

SPK1N

Negative receiver output

1_3

SPK1P

Positive receiver output

1_4

MIC1P

Positive microphone input

The handset which suits for the M80 EVB is different from the common handset and Quectel does

not provide this handset. The following picture illustrates a connection between RJ11 and the

handset. Customer can refer to the following picture to make a handset which suits for the M80

EVB.

RJ11

Handset

SPKN

SPKP

MICN

MICP

33pF

10pF

Mic

Figure 11: Connection between handset and RJ11

3.3.2. Earphone

AIN2/AOUT2 can be also designed as earphone. The schematic is shown as below. ADC0 and

EINT are used for earphone auxiliary function (etc: detect earphone, establish or reject phone call),

but this function is not supported in standard module.

Quectel

Confidential

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 37 38

Quectel Cellular Engine 1
Confidential 10

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