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3.7
Serial Interfaces ..................................................................................................................... 23
3.7.1
Ring indicate ................................................................................................................ 24
3.7.2
DCD indicate ............................................................................................................... 25
3.8
SIM Interface .......................................................................................................................... 25
3.8.1
SIM Connection ........................................................................................................... 26
3.8.2
SIM Design Guidelines ................................................................................................ 26
3.8.3
SIM Detected feature .................................................................................................. 27
3.9
Audio Interface ....................................................................................................................... 27
3.9.1
1
3.9.2
1
3.9.3
2
3.9.4
2
3.9.5
Audio Design ............................................................................................................... 29
3.9.6
Switch Audio Channel by IO ........................................................................................ 30
3.10 A/D Interface .......................................................................................................................... 30
3.10.1
Power Supply ADC ...................................................................................................... 31
3.10.2
General Purpose ADC ................................................................................................. 31
3.11
Controls and Indicators Interface ........................................................................................... 31
3.11.1
VDD Reference Regulator .......................................................................................... 32
3.11.2
External Reset ............................................................................................................. 32
3.11.3
LPG ............................................................................................................................. 33
3.11.4
Trace Ports .................................................................................................................. 34
3.11.5
General Purpose I/O ................................................................................................... 35
4
Electrical and Environmental Specifications Absolute Maximum Ratings ........................................ 36
4.1
Electrical Specifications Absolute Maximum Ratings ............................................................ 36
4.2
Environmental Specifications Absolute Maximum Ratings .................................................... 36
4.3
Application Interface Specifications ....................................................................................... 36
5
Mechanical Design ............................................................................................................................ 40
5.1
G610 Mechanical Specifications ............................................................................................ 40
5.2
Recommanded PCB layout: ................................................................................................... 41
5.3
Antenna Design ...................................................................................................................... 42
5.4
Reflow temperature profile ..................................................................................................... 44
6
Antenna Interface .............................................................................................................................. 45
G610 GPRS Module Hardware User Manual
Audio Channel: Microphone ................................................................................... 28
Audio Channel: Speaker ......................................................................................... 28
Audio Channel: Microphone .................................................................................. 28
Audio Channel: Speaker ........................................................................................ 29
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