Specifications

XT55 Hardware Interface Description
Confidential / Preliminary
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mo b i l e
XT55_hd_v00.02 Page 7 of 116 17.03.2004
Figure 52: XT55 bottom view..............................................................................................107
Figure 53: Mechanical dimensions of XT55........................................................................108
Figure 54: Mounting holes on XT55 ...................................................................................109
Figure 55: Recommended dowel........................................................................................110
Figure 56: Mechanical dimensions of Hirose DF12 connector............................................112
Figure 57: Reference equipment for approval ....................................................................113
Tables
Table 1: XT55 key features ..................................................................................................19
Table 2: GSM/GPRS coding schemes and maximum net data rates over air interface ........21
Table 3: Overview of GSM/GPRS operating modes .............................................................25
Table 4: Power supply pins of board-to-board connector .....................................................27
Table 5: AT commands available in Alarm mode .................................................................32
Table 6: Temperature dependent behavior ..........................................................................37
Table 7: Bill of material for external charging circuit .............................................................41
Table 8: Specifications of recommended battery pack .........................................................43
Table 9: Comparison Charge-only and Charge mode ..........................................................45
Table 10: AT commands available in Charge-only mode......................................................46
Table 11: Wake-up events in NON-CYCLIC and CYCLIC SLEEP modes............................50
Table 12: State transitions of XT55 (except SLEEP mode) ..................................................52
Table 13: DCE-DTE wiring of 1st serial interface (GSM/GPRS part)....................................55
Table 14: DCE-DTE wiring of 2nd serial interface (GSM/GPRS part)...................................55
Table 15: Signals of the SIM interface (board-to-board connector) ......................................60
Table 16: Pin assignment of Molex SIM card holder on DSB45 Support Box .......................62
Table 17: Input control signals of the GSM/GPRS part of the XT55 module ........................63
Table 18: Coding of the status LED......................................................................................65
Table 19: ASC0 ring signal...................................................................................................67
Table 20: Return loss ...........................................................................................................78
Table 21: Product specifications of U.FL-R-SMT connector .................................................81
Table 22: Material and finish of U.FL-R-SMT connector and recommended plugs...............82
Table 23: Ordering information for Hirose U.FL Series.........................................................84
Table 24: Absolute maximum ratings (GSM/GPRS part)......................................................85
Table 25: Absolute maximum rating (GPS part) ...................................................................85
Table 26: Operating temperatures........................................................................................85
Table 27: Electrical description of application interface ........................................................87
Table 28: Power supply ratings (GSM/GPRS part)...............................................................92
Table 29: Power supply ratings (GPS part) ..........................................................................93
Table 30: Audio parameters adjustable by AT command .....................................................99
Table 31: Voiceband characteristics (typical) .....................................................................101
Table 32: Voiceband receive path ......................................................................................102
Table 33: Voiceband transmit path.....................................................................................103
Table 34: Air Interface........................................................................................................104
Table 35: Measured electrostatic values ............................................................................105
Table 36: Summary of reliability test conditions..................................................................106
Table 37: Ordering information DF12 series.......................................................................111
Table 38: Electrical and mechanical characteristics of the Hirose DF12C connector..........111
Table 39: List of parts and accessories ..............................................................................115
Table 40: Molex sales contacts (subject to change) ...........................................................116
Table 41: Hirose sales contacts (subject to change) ..........................................................116