SimCom SIM900D Hardware Design page 5

Command manual (8 pages)

User manual (20 pages)

Hardware design (63 pages)

Table of Contents

Smart Machine Smart Decision

Table Index

TABLE 1: SIM900D KEY FEATURES ............................................................................................................................. 8

TABLE 2: CODING SCHEMES AND MAXIMUM NET DATA RATES OVER AIR INTERFACE ............................ 10

TABLE 3: OVERVIEW OF OPERATING MODES........................................................................................................ 10

TABLE 4: PIN DESCRIPTION ....................................................................................................................................... 14

TABLE 5:THE CURRENT CONSUMPTION OF MINIMUM FUNCTIONALITY MODE ......................................... 23

TABLE 6: SPECIFICATION OF RECOMMENDED BATTERY PACK........................................................................ 26

TABLE 7: CHARGE OPERATING MODES .................................................................................................................. 27

TABLE 8: AT COMMAND USUALLY USED IN CHARGE-ONLY MODE ................................................................ 27

TABLE 9: MICROPHONE INPUT CHARACTERISTICS ............................................................................................ 33

TABLE 10: AUDIO OUTPUT CHARACTERISTICS .................................................................................................... 34

TABLE 11: PIN DESCRIPTION (AMPHENOL SIM CARD HOLDER)....................................................................... 36

TABLE 12: PIN DESCRIPTION (MOLEX SIM CARD HOLDER) .............................................................................. 36

TABLE 13: ADC SPECIFICATION ................................................................................................................................ 37

TABLE 14: RI BEHAVIORS ........................................................................................................................................... 37

TABLE 15: STATUS OF THE NETLIGHT PIN.............................................................................................................. 39

TABLE 16: PIN DEFINITION OF THE GPIO INTERFACE ......................................................................................... 39

TABLE 17: ABSOLUTE MAXIMUM RATINGS........................................................................................................... 41

TABLE 18: RECOMMENDED OPERATING CONDITIONS ....................................................................................... 41

TABLE 19: DIGITAL INTERFACE CHARACTERISTICS ........................................................................................... 41

TABLE 20: SIM CARD INTERFACE CHARACTERISTICS........................................................................................ 42

TABLE 21: SIM_VDD CHARACTERISTICS................................................................................................................ 42

TABLE 22: VRTC CHARACTERISTICS ....................................................................................................................... 42

TABLE 23: CURRENT CONSUMPTION ...................................................................................................................... 42

TABLE 24: THE ESD CHARACTERISTICS (TEMPERATURE: 25℃, HUMIDITY: 45 %) ....................................... 43

TABLE 25: SIM900D GSM 900 AND GSM 850 CONDUCTED RF OUTPUT POWER ............................................. 44

TABLE 26: SIM900D DCS 1800 AND PCS 1900 CONDUCTED RF OUTPUT POWER............................................ 45

TABLE 27: SIM900D CONDUCTED RF RECEIVE SENSITIVITY ............................................................................ 46

TABLE 28: SIM900D OPERATING FREQUENCIES.................................................................................................... 46

TABLE 29: RELATED DOCUMENTS ........................................................................................................................... 48

TABLE 30: TERMS AND ABBREVIATIONS................................................................................................................ 49

TABLE 31: SAFETY CAUTION..................................................................................................................................... 50

SIM900D_Hardware Design_V2.02

2012-05-07

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