Hardware Design - Rainbow Technologies

SIM300DZ Hardware DesignContentsContents ............................................................................................................................................3Version history..................................................................................................................................71 Introduction....................................................................................................................................81.1 Related documents ...............................................................................................................81.2 Terms and abbreviations.......................................................................................................92 Product concept............................................................................................................................112.1 SIM300DZ key features at a glance...................................................................................123 Application interface....................................................................................................................143.1 SIM300DZ pin description.................................................................................................143.2 Operating modes ................................................................................................................163.3 Power supply......................................................................................................................183.3.1 Power supply pins ....................................................................................................183.3.2 Minimizing power losses..........................................................................................193.3.3 Monitoring power supply .........................................................................................193.4 Power up / down scenarios.................................................................................................193.4.1 Turn on SIM300DZ..................................................................................................193.4.2 Turn off SIM300DZ .................................................................................................213.4.3 Restart SIM300DZ using the PWRKEY pin ............................................................243.5 Charging interface..............................................................................................................243.5.1 Battery pack characteristics......................................................................................253.5.2 Recommended battery pack .....................................................................................253.5.3 Implemented charging technique..............................................................................263.5.4 Operating modes during charging ............................................................................273.5.5 Charger requirements ...............................................................................................283.6 Power saving ......................................................................................................................283.6.1 Minimum functionality mode...................................................................................283.6.2 SLEEP mode (slow clocking mode).........................................................................293.6.3 Wake up SIM300DZ from SLEEP mode.................................................................293.7 Summary of state transitions (except SLEEP mode) .........................................................303.8 RTC backup........................................................................................................................313.9 Serial interfaces..................................................................................................................343.9.1 Function of Serial port and Debug port supporting..................................................353.9.2 Software upgrade and serial Port..............................................................................363.10 Audio interfaces ...............................................................................................................383.10.1 Speaker interface configuration..............................................................................393.10.2 Microphone interfaces configuration......................................................................403.10.3 Earphone interface configuration ...........................................................................413.10.4 Referenced electronic characteristic.......................................................................413.11 SIM interface....................................................................................................................423.11.1 SIM card application ..............................................................................................42SIM300DZ_HD_V2.03 310.01.2007