Hardware Design V1.01(091226)

SIM900 Hardware Design
Table Index
TABLE 1: RELATED DOCUMENTS............................................................................................................................... 8
TABLE 2: TERMS AND ABBREVIATIONS ................................................................................................................... 8
TABLE 3: SIM900 KEY FEATURES.............................................................................................................................. 12
TABLE 4: CODING SCHEMES AND MAXIMUM NET DATA RATES OVER AIR INTERFACE ............................ 14
TABLE 5: PIN DESCRIPTION ....................................................................................................................................... 16
TABLE 6: OVERVIEW OF OPERATING MODES........................................................................................................ 19
TABLE 7: PIN DEFINITION OF THE SERIAL INTERFACES .................................................................................... 31
TABLE 8: LOGIC LEVELS OF THE SERIAL PORT AND DEBUG PORT ................................................................. 32
TABLE 9: PIN DEFINE OF THE AUDIO INTERFACE ................................................................................................ 35
TABLE 10: MIC INPUT CHARACTERISTICS ............................................................................................................. 37
TABLE 11: AUDIO OUTPUT CHARACTERISTICS .................................................................................................... 37
TABLE 12: PIN DEFINE OF THE SIM INTERFACE.................................................................................................... 38
TABLE 13: PIN DESCRIPTION (AMPHENOL SIM CARD HOLDER) ...................................................................... 40
TABLE 14: PIN DESCRIPTION (MOLEX SIM CARD HOLDER) .............................................................................. 41
TABLE 15: PIN DEFINE OF THE LCD INTERFACE................................................................................................... 42
TABLE 16: PIN DEFINE OF THE KEYPAD INTERFACE........................................................................................... 42
TABLE 17: ADC SPECIFICATION ................................................................................................................................43
TABLE 18: BEHAVIOURS OF THE RI.......................................................................................................................... 44
TABLE 19: WORKING STATE OF THE NETLIGHT ................................................................................................... 45
TABLE 20: PIN DEFINE OF THE GPIO INTERFACE ................................................................................................. 46
TABLE 21: PIN DEFINE OF THE PWM........................................................................................................................ 47
TABLE 22: PIN DEFINE OF THE I2C BUS .................................................................................................................. 47
TABLE 23: SIM900 CONDUCTED RF OUTPUT POWER........................................................................................... 48
TABLE 24: SIM900 CONDUCTED RF RECEIVE SENSITIVITY ............................................................................... 48
TABLE 25: SIM900 OPERATING FREQUENCIES ...................................................................................................... 48
TABLE 26: ABSOLUTE MAXIMUM RATINGS........................................................................................................... 49
TABLE 27: SIM900 OPERATING TEMPERATURE..................................................................................................... 49
TABLE 28: SIM900 POWER SUPPLY RATINGS ......................................................................................................... 49
TABLE 29: SIM900 CURRENT CONSUMPTION ........................................................................................................ 51
TABLE 30: THE ESD ENDURE STATUE MEASURED TABLE (TEMPERATURE: 25℃, HUMIDITY:45% ) ........ 52
TABLE 31: PIN ASSIGNMENT...................................................................................................................................... 55
SIM900_HD_V1.01 26.12.2009
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