WMOi3 integrated Modem
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without prior written agreement. Ce document est la propriété exlcusive de WAVECOM. Il ne peut
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9
3.2.3
3.2.3
3.2.3
3.2.3
Remote SIM Interface
Remote SIM Interface
Remote SIM Interface
Remote SIM Interface
A SIM connector is already integrated on the integrated modem (see 3.3 SIM
interface). However there is the possibility to implement a remote SIM
connector using the signals described in the table below.
PIN number
PIN number
PIN number
PIN number
Signal
Signal
Signal
Signal
47
SIMVCC
46
SIMRST
45
SIMCLK
50
GND
49
SIMDATA
48
SIMPRES
3.2.4
3.2.4
3.2.4
3.2.4
Audio
Audio
Audio
Audio
The modem allows the connection of a handset or a headset through AUDIO
signals
The audio end stage must respects the following specifications :
3.2.4.1
Microphone 2
The MIC2 inputs are differential ones. They already include the convenient
biasing for an electret microphone (0,5 mA and 2 Volts). This electret
microphone can be directly connected on these inputs. The impedance of the
microphone 2 has to be around 2k
Ω
. These inputs are the standard ones for an
handset design while MIC1 inputs can be connected to an external headset or
a handsfree kit.
The gain of MIC2 inputs is internally adjusted. The gain can be tuned from
30dB to 51dB. The connexion to the microphone is direct.
Pin description
Pin description
Pin description
Pin description
Signal
Signal
Signal
Signal
Pin #
Pin #
Pin #
Pin #
I/O
I/O
I/O
I/O
I/O type
I/O type
I/O type
I/O type
Description
Description
Description
Description
MIC2P
16
I
Analog
Microphone 2 positive
input
MIC2N
18
I
Analog
Microphone 2 negative
input