User's Manual Part 1

MC75 Hardware Interface Description
Strictly confidential / Draft
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MC75_V00.190a Page 4 of 91 15.02.2005
3.12.2.2 Differential Microphone Input.................................................................51
3.12.2.3 Line Input Configuration with OpAmp ....................................................52
3.12.3 Loudspeaker Circuit...............................................................................53
3.12.4 Digital Audio Interface DAI.....................................................................54
3.13 Control Signals ....................................................................................................56
3.13.1 Synchronization Signal ..........................................................................56
3.13.2 Using the SYNC Pin to Control a Status LED........................................57
4 Antenna Interface........................................................................................................58
4.1 Antenna Installation .............................................................................................58
4.2 Antenna Pad ........................................................................................................60
4.2.1 Suitable Cable Types.............................................................................60
4.3 Antenna Connector..............................................................................................61
5 Electrical, Reliability and Radio Characteristics......................................................65
5.1 Absolute Maximum Ratings .................................................................................65
5.2 Operating Temperatures......................................................................................65
5.3 Pin Assignment and Signal Description...............................................................66
5.4 Electrostatic Discharge ........................................................................................72
5.5 Reliability Characteristics.....................................................................................73
6 Mechanics....................................................................................................................74
6.1 Mechanical Dimensions of MC75 ........................................................................74
6.2 Mounting MC75 to the Application Platform ........................................................76
6.3 Board-to-Board Application Connector ................................................................77
7 Sample Application.....................................................................................................80
8 Reference Approval ....................................................................................................82
8.1 Reference Equipment for Type Approval.............................................................82
8.2 Compliance with FCC Rules and Regulations.....................................................83
9 Appendix......................................................................................................................84
9.1 List of Parts and Accessories ..............................................................................84
9.2 Fasteners and Fixings for Electronic Equipment .................................................86
9.2.1 Fasteners from German Supplier ETTINGER GmbH ............................86
9.3 Data Sheets of Recommended Batteries ............................................................89
Tables
Table 1: Temperature dependent behavior ............................................................................ 31
Table 2: Specifications of battery packs suitable for use with MC75 ..................................... 35
Table 3: Comparison Charge-only and Charge mode............................................................ 37
Table 4: AT commands available in Charge-only mode......................................................... 37
Table 5: Signals of the SIM interface (board-to-board connector) ......................................... 39
Table 6: DCE-DTE wiring of ASC0......................................................................................... 41
Table 7: DCE-DTE wiring of ASC1......................................................................................... 42
Table 8: SD card interface......................................................................................................47
Table 9: Overview of USC pin functions................................................................................. 54
Table 10: Return loss in the active band ................................................................................58
Table 11: Product specifications of U.FL-R-SMT connector .................................................. 61
Table 12: Material and finish of U.FL-R-SMT connector and recommended plugs ...............62
Table 13: Ordering information for Hirose U.FL Series .......................................................... 64
Table 14: Absolute maximum ratings ..................................................................................... 65
Table 15: Operating temperatures ......................................................................................... 65