Specifications

TC35 / TC37 Hardware Interface Description
TC35_37_HD_02_V03.10 - Released Page 5 of 92 21.12.2001
Figures
Figure 1: Block diagram of TC35 ......................................................................................... 18
Figure 2: Block diagram of TC37 ......................................................................................... 19
Figure 3: Block diagram of a cellular application.................................................................. 21
Figure 4: Power supply limits during transmit burst.............................................................. 24
Figure 5: Battery pack circuit diagram ................................................................................. 25
Figure 6: Charging process ................................................................................................. 27
Figure 7: Power-on by ignition signal................................................................................... 30
Figure 8: Timing of power-on process if VDDLP is not used................................................ 31
Figure 9: Timing of power-on process if VDDLP is fed from external source ....................... 31
Figure 10: Deactivating GSM engine by Power Down signal ............................................... 34
Figure 11: RTC supply from capacitor ................................................................................. 38
Figure 12: RTC supply from rechargeable battery (accumulator) ........................................ 38
Figure 13: RTC supply from non-chargeable battery ........................................................... 39
Figure 14: RS-232 interface................................................................................................. 40
Figure 15: Audio block diagram ........................................................................................... 42
Figure 16: SIM card holder of DSB35 Support Box.............................................................. 45
Figure 17: Connecting a separate ground for SIM interface ................................................ 46
Figure 18: TC35 output control signals ................................................................................ 48
Figure 19: LED Circuit (Example) ........................................................................................ 49
Figure 20: Incoming voice call ............................................................................................. 50
Figure 21: Incoming data call............................................................................................... 50
Figure 22: Antenna connector circuit on TC35..................................................................... 57
Figure 23: Antenna connector circuit on TC37..................................................................... 57
Figure 24: Exploded diagram and PCBs of TC35/TC37 ...................................................... 59
Figure 25: TC35 / TC37 – view of RF part ........................................................................... 60
Figure 26: Mechanical dimensions of TC35......................................................................... 61
Figure 27: Mechanical dimensions of TC37......................................................................... 62
Figure 28: Mounting TC35 (example) .................................................................................. 63
Figure 29: Mounting TC37 (example) .................................................................................. 64
Figure 30: Positioning labels................................................................................................ 65
Figure 31: Label dimensions................................................................................................ 65
Figure 32: Content of TC35 label......................................................................................... 66
Figure 33: Mechanical dimensions of ZIF connector............................................................ 68
Figure 34: PCB ZIF connector ............................................................................................. 68
Figure 35: Mechanical dimensions of MuRata GSC connector (in mm) ............................... 70
Figure 36: Maximum mechanical stress to the connector .................................................... 71
Figure 37: How to use MuRata tool ..................................................................................... 71
Figure 38: Dimensions and position of coaxicon connector and antenna pad on TC37 ....... 73
Figure 39: Typical current (peak) vs power control level...................................................... 76
Figure 40: Typical current (average) vs power control level................................................. 76
Figure 41: Typical current consumption for GSM 900, power level = 5 ................................ 78
Figure 42: Typical current consumption for DCS1800, power level = 0................................ 78
Figure 43: AT audio programming model ............................................................................ 80
Figure 44: Structure of audio inputs..................................................................................... 83
Figure 45: Reference equipment for approval...................................................................... 87