hardware design v1.00

Smart Machine Smart Decision
SIM968_Hardware Design_V1.00 2013.02.25
6
Figure Index
FIGURE 1: SIM968 FUNCTIONAL DIAGRAM ...........................................................................................................12
FIGURE 2: SIM968 PIN OUT DIAGRAM (TOP VIEW)............................................................................................... 13
FIGURE 3: DIMENSIONS OF SIM968（UNIT: MM）................................................................................................ 16
FIGURE 4: RECOMMENDED PCB FOOTPRINT OUTLINE（UNIT: MM）............................................................ 17
FIGURE 5: REFERENCE CIRCUIT OF THE LDO POWER SUPPLY ......................................................................... 18
FIGURE 6: REFERENCE CIRCUIT OF THE DC-DC POWER SUPPLY..................................................................... 18
FIGURE 7: VBAT VOLTAGE DROP DURING TRANSMIT BURST........................................................................... 19
FIGURE 8: THE MINIMAL VBAT VOLTAGE REQUIREMENT AT VBAT DROP .................................................... 19
FIGURE 9: POWERED ON/DOWN MODULE USING TRANSISTOR....................................................................... 19
FIGURE 10: POWERED ON/DOWN MODULE USING BUTTON ............................................................................. 20
FIGURE 11: TIMING OF POWER ON MODULE......................................................................................................... 20
FIGURE 12: TIMING OF POWER DOWN SIM968 BY PWRKEY.............................................................................. 21
FIGURE 13: TIMING OF RESTART SIM968 ................................................................................................................ 22
FIGURE 14: SIM968 WITH BATTERY CHARGER AND PACK CONNECTION....................................................... 24
FIGURE 15: RTC SUPPLY FROM CAPACITOR........................................................................................................... 28
FIGURE 16: RTC SUPPLY FROM NON-CHARGEABLE BATTERY ......................................................................... 28
FIGURE 17: RTC SUPPLY FROM RECHARGEABLE BATTERY .............................................................................. 28
FIGURE 18: SEIKO XH414H-IV01E CHARGE-DISCHARGE CHARACTERISTIC ................................................. 28
FIGURE 19: CONNECTION OF THE SERIAL INTERFACES..................................................................................... 29
FIGURE 20: CONNECTION OF RXD AND TXD ONLY ............................................................................................. 29
FIGURE 21: CONNECTION FOR SOFTWARE UPGRADING AND DEBUGGING.................................................. 30
FIGURE 22: SPEAKER REFERENCE CIRCUIT .......................................................................................................... 31
FIGURE 23: SPEAKER WITH AMPLIFIER REFERENCE CIRCUIT ......................................................................... 31
FIGURE 24 : MICROPHONE REFERENCE CIRCUIT................................................................................................. 32
FIGURE 25: EARPHONE REFERENCE CIRCUIT....................................................................................................... 32
FIGURE 26: REFERENCE CIRCUIT OF THE 8-PIN SIM CARD HOLDER............................................................... 33
FIGURE 27: REFERENCE CIRCUIT OF THE 6-PIN SIM CARD HOLDER............................................................... 34
FIGURE 28: AMPHENOL C707 10M006 5122 SIM CARD HOLDER......................................................................... 34
FIGURE 29: MOLEX 91228 SIM CARD HOLDER ...................................................................................................... 35
FIGURE 30: REFERENCE CIRCUIT OF THE KEYPAD INTERFACE ....................................................................... 36
FIGURE 31: RI BEHAVIOUR OF VOICE CALLING AS A RECEIVER...................................................................... 37
FIGURE 32: RI BEHAVIOUR OF DATA CALLING AS A RECEIVER........................................................................ 38
FIGURE 33: RI BEHAVIOUR OF URC OR RECEIVE SMS ........................................................................................38
FIGURE 34: RI BEHAVIOUR AS A CALLER ............................................................................................................... 38
FIGURE 35: REFERENCE CIRCUIT OF NETLIGHT .................................................................................................. 39
FIGURE 36: RESET TIMING ......................................................................................................................................... 39
FIGURE 37: RESET REFERENCE DESIGN CIRCUIT ................................................................................................ 40
FIGURE 38: THE RF INTERFACE OF MODULE......................................................................................................... 41
FIGURE 39: GSM ANTENNA MATCHING CIRCUIT ................................................................................................. 41
FIGURE 40: INTERNAL SUPPLY ANTENNA BIAS VOLTAGE.................................................................................44
FIGURE 41: EXTERNAL SUPPLY ANTENNA BIAS VOLTAGE................................................................................ 44
FIGURE 42: GNSS ANTENNA MATCHING CIRCUIT................................................................................................ 46
FIGURE 43: OPEN CIRCUIR DETECTION-A.............................................................................................................. 48
FIGURE 44: OPEN CIRCUIR DETECTION-B.............................................................................................................. 48
FIGURE 45: MODULE LABEL INFORMATION.......................................................................................................... 55