SimCom SIM548C HD V1.01 Hardware Design page 7

SIM548C Hardware Design
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ...............................................................................................18
FIGURE 2: REFERENCE CIRCUIT OF THE VBAT INPUT ..............................................................23
FIGURE 3: REFERENCE CIRCUIT OF THE SOURCE POWER SUPPLY INPUT...........................24
FIGURE 4: VBAT VOLTAGE DROP DURING TRANSMIT BURST ................................................24
FIGURE 5: TURN ON GSM PART USING DRIVING CIRCUIT .......................................................26
FIGURE 6: TURN ON GSM PART USING BUTTON.........................................................................26
FIGURE 7: TIMING OF TURN ON GSM PART..................................................................................27
FIGURE 8: TIMING OF TURN OFF GSM PART ................................................................................30
FIGURE 9: TIMING OF RESTART GSM PART ..................................................................................32
FIGURE 10: BATTERY CHARGER AND PACK ................................................................................33
FIGURE 11: RTC SUPPLY FROM NON-CHARGEABLE BATTERY ...............................................41
FIGURE 12: RTC SUPPLY FROM RECHARGEABLE BATTERY ....................................................42
FIGURE 13: RTC SUPPLY FROM CAPACITOR ................................................................................42
FIGURE 14: PANASONIC EECEMOE204A CHARGE CHARACTERISTIC ...................................43
FIGURE 15: MAXELL TC614 CHARGE CHARACTERISTIC..........................................................43
FIGURE 16: SEIKO TS621 CHARGE CHARACTERISTIC ...............................................................44
FIGURE 17: CONNECTION OF THE SERIAL INTERFACES ..........................................................46
FIGURE 18: CONNECTION OF SOFTWARE UPGRADE .................................................................48
FIGURE 19: CONNECTION OF SOFTWARE DEBUG ......................................................................48
FIGURE 20: RS232 LEVEL CONVERTER CIRCUIT.........................................................................49
FIGURE 21: SPEAKER INTERFACE CONFIGURATION .................................................................50
FIGURE 22: SPEAKER INTERFACE WITH AMPLIFIER CONFIGURATION ................................51
FIGURE 23: MICROPHONE INTERFACE CONFIGURATION ........................................................51
FIGURE 24: EARPHONE INTERFACE CONFIGURATION..............................................................52
FIGURE 25: SIM INTERFACE REFERENCE CIRCUIT WITH 8-PIN SIM CARD ..........................54
FIGURE 26: SIM INTERFACE REFERENCE CIRCUIT WITH 6-PIN SIM CARD ..........................55
FIGURE 27: AMPHENOL C707-10M006 512 2 SIM CARD HOLDER .............................................55
FIGURE 28: MOLEX 91228 SIM CARD HOLDER ............................................................................56
FIGURE 29: THE GSM PART SERVICES AS RECEIVER .................................................................59
FIGURE 30: THE GSM PART SERVICES AS CALLER .....................................................................59
FIGURE 31: REFERENCE CIRCUIT OF NETLIGHT ........................................................................60
FIGURE 32: REFERENCE CIRCUIT OF BUZZER ............................................................................61
FIGURE 33: THEORY OF OPERATION..............................................................................................62
FIGURE 34: TURN ON THE GPS MODULE ......................................................................................67
FIGURE 35: THEORY OF THE GPS RTC CIRCUIT ..........................................................................68
FIGURE 36: THEORY OF THE RESET CIRCUIT ..............................................................................68
FIGURE 37: RF CONNECTOR AND RF PAD.....................................................................................73
FIGURE 38: RF CONNECTOR ............................................................................................................75
FIGURE 39: POWER DOWN MODE...................................................................................................81
FIGURE 40: PUSH-TO-FIX MODE .....................................................................................................82
FIGURE 41: POWER CONSUMPTION IN THE PTF MODE.............................................................83
FIGURE 42: MECHANICAL DIMENSIONS OF MODULE（UNIT: MM） ....................................85
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SIM548C_HD_V1.01 09.05.2008