Siemens MC45 Manual page 5

MC45 Hardware Interface Description
P R E L I M I N A R Y
Figures
Figure 1: MC45 block diagram .............................................................................................21
Figure 2: Power supply limits during transmit burst ..............................................................26
Figure 3: Schematic of approved charging transistor, trickle charging and ESD protection..27
Figure 4: Battery pack circuit diagram ..................................................................................28
Figure 5: Charging process ..................................................................................................30
Figure 6: Power-on by ignition signal....................................................................................33
Figure 7: Timing of power-on process if VDDLP is not used ................................................34
Figure 8: Timing of power-on process if VDDLP is fed from external source........................34
Figure 9: Timing of /CTS signal (example for a 2.12 s paging cycle)....................................37
Figure 10: Beginning of power saving if CFUN=5.................................................................38
Figure 11: Deactivating GSM engine by /EMERGOFF signal ...............................................41
Figure 12: RTC supply from capacitor ..................................................................................46
Figure 13: RTC supply from rechargeable battery................................................................46
Figure 14: RTC supply from non-chargeable battery............................................................46
Figure 15: RS-232 interfaces ...............................................................................................47
Figure 16: Audio block diagram............................................................................................49
Figure 17: Schematic of microphone inputs .........................................................................50
Figure 18: DAI timing on transmit path .................................................................................52
Figure 19: DAI timing on receive path ..................................................................................52
Figure 20: SIM card holder of DSB45 Support Box ..............................................................55
Figure 21: Connecting a separate ground for SIM interface .................................................56
Figure 22: SYNC signal during transmit burst ......................................................................58
Figure 23: LED Circuit (Example) .........................................................................................59
Figure 24: Incoming voice call ..............................................................................................60
Figure 25: Incoming data call ...............................................................................................60
Figure 26: Pin assignment (top view on MC45) ....................................................................61
Figure 27: MC45 - top view..................................................................................................66
Figure 28: Mechanical dimensions of MC45.........................................................................67
Figure 29: MC45 bottom view...............................................................................................68
Figure 30: Hirose DF12C receptacle on MC45 .....................................................................70
Figure 31: Header Hirose DF12 series .................................................................................70
Figure 32: Mechanical dimensions of Hirose DF12 connector ..............................................71
Figure 33: Mechanical dimensions of U.FL-R-SMT connector..............................................72
Figure 34: U.FL-R-SMT connector with U.FL-LP-040 plug ...................................................73
Figure 35: U.FL-R-SMT connector with U.FL-LP-066 plug ...................................................73
Figure 36: Specifications of U.FL-LP-(V)-040(01) plug .........................................................74
Figure 37: Restricted area around antenna pad ...................................................................75
Figure 38: Typical current consumption vs. power level .......................................................79
Figure 39: Typical current consumption vs. return loss.........................................................80
Figure 40: AT audio programming model .............................................................................82
Figure 41: Reference equipment for approval ......................................................................88
Tables
Table 1: MC45 key features .................................................................................................18
Table 2: Coding schemes and maximum net data rates over air interface ...........................20
Table 3: Overview of operating modes .................................................................................23
Table 4: Power supply pins of board-to-board connector .....................................................25
Table 5: Bill of material for external charging circuit .............................................................27
Table 6: Specifications of XWODA battery pack ..................................................................29
Table 7: Comparison Charge-only and Charge mode ..........................................................31
MC45_HD_01_V00.02a Page 5 of 90 12.08.2002