hardware design v2.00

Smart Machine Smart Decision
SIM908_Hardware Design_V2.00 2012.05.07
5
Table Index
TABLE 1: SIM908 GSM/GPRS ENGINE KEY FEATURES ........................................................................................... 8
TABLE 2: GPS ENGINE PERFORMANCE ................................................................................................................... 10
TABLE 3: CODING SCHEMES AND MAXIMUM NET DATA RATES OVER AIR INTERFACE ............................ 10
TABLE 4: OVERVIEW OF OPERATING MODES........................................................................................................ 11
TABLE 5: PIN DESCRIPTION ....................................................................................................................................... 14
TABLE 6: THE CURRENT CONSUMPTION OF MINIMUM FUNCTIONALITY MODE ........................................ 23
TABLE 7: SPECIFICATION OF RECOMMENDED BATTERY PACK........................................................................ 25
TABLE 8: CHARGE OPERATING MODES .................................................................................................................. 26
TABLE 9: AT COMMAND USUALLY USED IN CHARGE-ONLY MODE ................................................................ 27
TABLE 10: MICROPHONE INPUT CHARACTERISTICS........................................................................................... 32
TABLE 11: AUDIO OUTPUT CHARACTERISTICS .................................................................................................... 33
TABLE 12: PIN DESCRIPTION (AMPHENOL SIM CARD HOLDER)....................................................................... 35
TABLE 13: PIN DESCRIPTION (MOLEX SIM CARD HOLDER) .............................................................................. 35
TABLE 14: PIN DEFINITION OF THE KEYPAD INTERFACE................................................................................... 36
TABLE 15: ADC SPECIFICATION ................................................................................................................................37
TABLE 16: RI BEHAVIORS ........................................................................................................................................... 37
TABLE 17: STATUS OF THE NETLIGHT PIN.............................................................................................................. 38
TABLE 18: PIN DEFINITION OF THE GPIO INTERFACE ......................................................................................... 39
TABLE 19: AT COMMANDS FOR GPS FUNCTION.................................................................................................... 41
TABLE 20: ABSOLUTE MAXIMUM RATINGS........................................................................................................... 44
TABLE 21: RECOMMENDED OPERATING CONDITIONS ....................................................................................... 44
TABLE 22: DIGITAL INTERFACE CHARACTERISTICS ........................................................................................... 44
TABLE 23: SIM CARD INTERFACE CHARACTERISTICS........................................................................................ 45
TABLE 24: VDD_EXT CHARACTERISTICS ............................................................................................................... 45
TABLE 25: SIM_VDD CHARACTERISTICS................................................................................................................ 45
TABLE 26: VRTC CHARACTERISTICS ....................................................................................................................... 45
TABLE 27: GSM CURRENT CONSUMPTION............................................................................................................. 46
TABLE 28: THE ESD CHARACTERISTICS (TEMPERATURE: 25℃, HUMIDITY: 45 %) ....................................... 47
TABLE 29: SIM908 GSM 900 AND GSM 850 CONDUCTED RF OUTPUT POWER ................................................ 47
TABLE 30: SIM908 DCS 1800 AND PCS 1900 CONDUCTED RF OUTPUT POWER............................................... 48
TABLE 31: SIM908 CONDUCTED RF RECEIVE SENSITIVITY ............................................................................... 49
TABLE 32: SIM908 OPERATING FREQUENCIES....................................................................................................... 49
TABLE 33: ILLUSTRATION OF MODULE LABEL .................................................................................................... 50
TABLE 34: RELATED DOCUMENTS ........................................................................................................................... 51
TABLE 35: TERMS AND ABBREVIATIONS................................................................................................................ 52
TABLE 36: SAFETY CAUTION..................................................................................................................................... 53