MC55i Terminal Hardware Interface Description
Contents
47
MC55i_Terminal_HD_v01.201a Page 3 of 47 2010-04-16
Confidential / Released
Contents
0 Document History...................................................................................................... 7
1 Introduction.................................................................................................................8
1.1 Related Documents ...........................................................................................8
1.2 Terms and Abbreviations...................................................................................9
1.3 Regulatory and Type Approval Information .....................................................11
1.3.1 Directives and Standards....................................................................11
1.3.2 Safety Precautions..............................................................................14
2 Product Concept.......................................................................................................16
2.1 Key Features at a Glance................................................................................16
3 Interface Description ................................................................................................18
3.1 Overview..........................................................................................................18
3.2 Block Diagram..................................................................................................19
3.3 Operating Modes .............................................................................................20
3.4 Terminal Circuit................................................................................................21
3.5 Power Supply...................................................................................................22
3.5.1 Turn MC55i Terminal on.....................................................................23
3.5.2 Reset MC55i Terminal ........................................................................23
3.5.3 Turn MC55i Terminal off.....................................................................23
3.5.4 Disconnecting power supply...............................................................24
3.5.5 Automatic thermal shutdown...............................................................24
3.5.6 RTC.....................................................................................................24
3.6 RS-232 Interface..............................................................................................25
3.7 Audio Interface.................................................................................................26
3.7.1 Supported Audio Modes .....................................................................27
3.7.2 Speech processing .............................................................................28
3.8 SIM Interface....................................................................................................29
3.9 Status LED.......................................................................................................30
3.10 Antenna Interface.............................................................................................31
4 Electrical and Environmental Characteristics........................................................33
4.1 Absolute Maximum Ratings.............................................................................33
4.2 Operating Temperatures..................................................................................34
4.3 Storage Conditions ..........................................................................................35
4.4 Electrical Specifications of the Application Interface........................................36
4.4.1 On/Off Control.....................................................................................36
4.4.2 RS-232 Interface.................................................................................37
4.4.3 Audio Interface....................................................................................38
4.5 Electrical Characteristics of the Voiceband Part..............................................39
4.6 Power Supply Ratings......................................................................................40
4.7 Antenna Interface.............................................................................................41
