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sources, such as the RF antenna and digital switching signals.
The SIM interface signals length should not exceed 100 mm between the G610 interface
connector and the SIM tray. This is to meet with EMC regulations and improve signal
integrity.
To avoid crosstalk between the SIM clock and data signals (SIM_CLK and SIM_DATA), it
is recommended to rout them separately on the application board, and preferably isolated
by a surrounding ground plane.
The SIM card signals should be protected from ESD using very low capacitance protective
elements (zener diodes, etc.). The recommended part no of ESD is
AVR-M1005C080MTAAB (TDK). We also recommended the ESD component should
layout with SIM hold closely.
3.8.3 SIM Detected feature
When set AT+MSMPD=1, the SIM detected feature will be actives. The SIM card is on site or
not will be detected with SIM_CD pin.
SIM_CD=Low level, SIM card is onsite and register the network automatically.
SIM_CD=High or NC, SIM card is off site and G610 drop out the network.
Important:
was disabled correspondingly.
3.9 Audio Interface
The G610 audio interface supports two channel audio devices and operating modes. The audio
interface's operating modes, active devices, amplification levels and speech processing algorithms
are fully controlled by the host application, through advanced programming options and a versatile
AT commands set.
G610 Pin#
13
14
11
12
G610 GPRS Module Hardware User Manual
The default value of MSMPD parameter is "0". And also, the SIM detected feature
G610 Signal name
MIC-
MIC+
AUXI+
AUXI-
Description
1st Audio channel
Balanced microphone input
2nd Audio channel
Balanced microphone input
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