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AC75 Hardware Interface Description
Strictly confidential / Preliminary
Figures
Figure 1: AC75 system overview............................................................................................19
Figure 2: AC75 block diagram................................................................................................20
Figure 3: Power supply limits during transmit burst................................................................ 25
Figure 4: Position of the reference points BATT+ and GND .................................................. 25
Figure 7: Timing of IGT if used as ON/OFF switch ................................................................ 29
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............................................................................................ 53
Figure 17: Serial interface ASC1............................................................................................ 55
Figure 18: USB circuit ............................................................................................................ 56
Figure 19: I2C interface connected to VCC of application ..................................................... 59
Figure 20: I2C interface connected to VEXT line of AC75 ..................................................... 60
Figure 21: SPI interface.......................................................................................................... 61
Figure 22: Characteristics of SPI modes................................................................................62
Figure 23: Audio block diagram..............................................................................................63
Figure 24: Single ended microphone input.............................................................................65
Figure 25: Differential microphone input ................................................................................66
Figure 26: Line input configuration with OpAmp .................................................................... 67
Figure 27: Differential loudspeaker configuration................................................................... 68
Figure 28: Master PCM interface Application......................................................................... 70
Figure 29: Short Frame PCM timing....................................................................................... 71
Figure 30: Long Frame PCM timing ....................................................................................... 71
Figure 31: Slave PCM interface application ........................................................................... 72
Figure 32: Slave PCM Timing, Short Frame selected ............................................................ 73
Figure 33: Slave PCM Timing, Long Frame selected............................................................. 73
Figure 34: SYNC signal during transmit burst ........................................................................ 75
Figure 35: LED Circuit (Example)........................................................................................... 76
Figure 36: Incoming voice/fax/data call .................................................................................. 77
Figure 37: URC transmission .................................................................................................77
Figure 38: Resistor measurement used for antenna detection .............................................. 79
Figure 39: Datasheet of Rosenberger SMP MIL-Std 348-A connector .................................. 81
Figure 40: Pin assignment (component side of AC75)........................................................... 86
Figure 41: Audio programming model ....................................................................................97
Figure 42: AC75 - top view ..................................................................................................103
Figure 43: Dimensions of AC75 ...........................................................................................104
Figure 44: Molex board-to-board connector 52991-0808 on AC75...................................... 107
Figure 45: Mating board-to-board connector 53748-0808 on application ............................ 108
Figure 46: AC75 sample application for Java....................................................................... 110
Figure 47: Reference equipment for Type Approval ............................................................ 111
Figure 48: Lithium Ion battery from VARTA ......................................................................... 119
Figure 49: VARTA PoLiFlex® Lithium Polymer battery........................................................ 120
AC75_HD_V00.202
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27.04.2006
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