hardware design v1 00 2

Smart Machine Smart Decision
SIM900R_Hardware Design_V1.00 4 2012-07-20
4.13 General Purpose Input/Output (GPIO) ................................................................................................... 34
4.14 External Reset......................................................................................................................................... 34
4.15 PWM ...................................................................................................................................................... 35
4.16 I
2
C Bus.................................................................................................................................................... 35
4.17 Antenna Interface ................................................................................................................................... 35
5 Electrical, Reliability and Radio Characteristics......................................................................................... 37
5.1 Absolute Maximum Ratings................................................................................................................... 37
5.2 Recommended Operating Conditions..................................................................................................... 37
5.3 Digital Interface Characteristics ............................................................................................................. 37
5.4 SIM Card Interface Characteristics ........................................................................................................ 38
5.5 VDD_EXT Characteristics ..................................................................................................................... 38
5.6 SIM_VDD Characteristics...................................................................................................................... 38
5.7 VRTC Characteristics............................................................................................................................. 39
5.8 Current Consumption (VBAT = 3.8V) ................................................................................................... 39
5.9 Electro-Static Discharge ......................................................................................................................... 40
5.10 Radio Characteristics.............................................................................................................................. 40
5.10.1 Module RF Output Power................................................................................................................ 40
5.10.2 Module RF Receive Sensitivity ....................................................................................................... 42
5.10.3 Module Operating Frequencies........................................................................................................ 42
6 Manufacturing ................................................................................................................................................ 43
6.1 Top and Bottom View of SIM900R ....................................................................................................... 43
6.2 Typical Solder Reflow Profile................................................................................................................ 44
Appendix ................................................................................................................................................................ 45
A. Related Documents.......................................................................................................................................... 45
B. Terms and Abbreviations ................................................................................................................................. 46
C. Safety Caution ................................................................................................................................................. 47