SimCom SIM900D Hardware Design page 4

SIM900D Hardware Design
3.10.1 Speaker Interface Configuration......................................................................................................41
3.10.2 Microphone Interfaces Configuration .............................................................................................42
3.10.3 Earphone Interface Configuration ...................................................................................................42
3.10.4 Referenced Electronic Characteristics.............................................................................................43
3.11 SIM Card Interface....................................................................................................................................44
3.11.1 SIM Card Application......................................................................................................................44
3.11.2 Design Considerations for SIM Card Holder ..................................................................................45
3.12 LCD Display Interface ..............................................................................................................................48
3.13 ADC ..........................................................................................................................................................48
3.14 Behaviors of the RI ...................................................................................................................................49
3.15 Network Status Indication .........................................................................................................................50
3.16 General Purpose Input Output (GPIO) ......................................................................................................51
3.17 PWM .........................................................................................................................................................51
4 Antenna Interface ..................................................................................................................................................53
4.1 Module RF Output Power ...........................................................................................................................53
4.2 Module RF Receive Sensitivity...................................................................................................................53
4.3 Module Operating Frequencies ...................................................................................................................53
5 Electrical, Reliability and Radio Characteristics...................................................................................................54
5.1 Absolute Maximum Ratings........................................................................................................................54
5.2 Operating Temperatures..............................................................................................................................54
5.3 Power Supply Ratings .................................................................................................................................54
5.4 Current Consumption ..................................................................................................................................56
5.5 Electro-Static Discharge..............................................................................................................................56
6 Mechanics .............................................................................................................................................................58
6.1 Mechanical Dimensions of SIM900D.........................................................................................................58
6.2 Top and Bottom View of the SIM900D.......................................................................................................60
6.3 PIN Assignment of SIM900D .....................................................................................................................60
6.4 The Ramp-Soak-Spike Reflow Profile of SIM900D...................................................................................62
SIM900D_Hardware Design_V1.04
4
2010.10.09