MC75i Hardware Interface Description
Figures
7
MC75i_HD_v01.100a Page 7 of 122 2009-08-13
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Figures
Figure 1: MC75i system overview ................................................................................. 21
Figure 2: MC75i block diagram ..................................................................................... 22
Figure 3: Power supply limits during transmit burst....................................................... 26
Figure 4: Position of the reference points BATT+ and GND ......................................... 26
Figure 5: Powerup with operating voltage at BATT+ applied before activating IGT...... 28
Figure 6: Powerup with IGT held low before switching on operating voltage at BATT+ 29
Figure 7: Timing of IGT if used as ON/OFF switch ....................................................... 30
Figure 8: Signal states during turn-off procedure.......................................................... 35
Figure 9: Battery pack circuit diagram........................................................................... 42
Figure 10: Power saving and paging............................................................................... 47
Figure 11: Timing of CTSx signal (if CFUN= 7)............................................................... 48
Figure 12: Timing of RTSx signal (if CFUN = 9).............................................................. 48
Figure 13: RTC supply from capacitor............................................................................. 50
Figure 14: RTC supply from rechargeable battery .......................................................... 50
Figure 15: RTC supply from non-chargeable battery ...................................................... 50
Figure 16: Serial interface ASC0..................................................................................... 52
Figure 17: Serial interface ASC1..................................................................................... 54
Figure 18: USB circuit ..................................................................................................... 55
Figure 19: I2C interface connected to VCC of application ............................................... 56
Figure 20: I2C interface connected to VEXT line of MC75i ............................................. 56
Figure 21: SPI interface................................................................................................... 57
Figure 22: Characteristics of SPI modes......................................................................... 58
Figure 23: Audio block diagram....................................................................................... 59
Figure 24: Single ended microphone input...................................................................... 61
Figure 25: Differential microphone input ......................................................................... 62
Figure 26: Line input configuration with OpAmp ............................................................. 63
Figure 27: Differential loudspeaker configuration............................................................ 64
Figure 28: Master PCM interface Application.................................................................. 66
Figure 29: Short Frame PCM timing................................................................................ 66
Figure 30: Long Frame PCM timing ................................................................................ 67
Figure 31: Slave PCM interface application .................................................................... 68
Figure 32: Slave PCM Timing, Short Frame selected..................................................... 68
Figure 33: Slave PCM Timing, Long Frame selected...................................................... 68
Figure 34: SYNC signal during transmit burst................................................................. 69
Figure 35: LED Circuit (Example).................................................................................... 70
Figure 36: Incoming voice/fax/data call........................................................................... 71
Figure 37: URC transmission .......................................................................................... 71
Figure 38: Never use antenna connector and antenna pad at the same time ................ 73
Figure 39: Restricted area around antenna pad.............................................................. 73
Figure 40: Mechanical dimensions of MC75i antenna connectors.................................. 75
Figure 41: U.FL-R-SMT connector with U.FL-LP-040 plug ............................................. 76
Figure 42: U.FL-R-SMT connector with U.FL-LP-066 plug ............................................. 76
Figure 43: Specifications of U.FL-LP-(V)-040(01) plug ................................................... 77
Figure 44: Audio programming model............................................................................. 95
Figure 45: MC75i– top view........................................................................................... 102
Figure 46: Dimensions of MC75i (all dimensions in mm) .............................................. 103
Figure 47: Molex board-to-board connector 52991-0808 on MC75i ............................. 107
Figure 48: Mating board-to-board connector 53748-0808 on application ..................... 108
Figure 49: MC75i sample application............................................................................ 110
Figure 50: Reference equipment for Type Approval ..................................................... 111
