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MC35i Terminal Hardware Interface Description

Confidential / Released

MC35i_T_HD_v02.00a Page 3 of 42 16.02.2007

Contents

0 Document history....................................................................................................... 5

1 Introduction ................................................................................................................ 6

1.1 References ......................................................................................................... 6

1.2 Directives and Standards .................................................................................... 7

1.3 Safety precautions .............................................................................................. 9

1.4 Terms and abbreviations....................................................................................11

2 Key features of MC35i Terminal ...............................................................................13

3 Interface description.................................................................................................15

3.1 Overview............................................................................................................15

3.2 Block diagram of a GSM application ..................................................................16

3.3 The MC35i GSM/GPRS engine..........................................................................17

3.4 Operating modes ...............................................................................................18

3.5 Terminal circuit...................................................................................................19

3.5.1 Power supply and On/Off control..........................................................20

3.5.1.1 Turn MC35i Terminal on.......................................................................21

3.5.1.2 Reset MC35i Terminal..........................................................................21

3.5.1.3 Turn MC35i Terminal off.......................................................................21

3.5.1.4 Disconnecting power supply .................................................................22

3.5.1.5 Automatic thermal shutdown ................................................................22

3.5.1.6 RTC......................................................................................................22

3.5.2 RS-232 interface ..................................................................................23

3.5.3 Audio interface .....................................................................................24

3.5.3.1 Supported audio modes .......................................................................25

3.5.3.2 Speech processing...............................................................................26

3.5.4 Radio interface .....................................................................................27

3.5.5 SIM interface ........................................................................................28

3.5.6 Status LED ...........................................................................................29

4 Mechanical characteristics and mounting advice ..................................................30

4.1 Mounting example..............................................................................................31

5 Electrical and environmental characteristics..........................................................32

6 Full type approval......................................................................................................40

6.1 Restrictions ........................................................................................................40

6.2 CE Conformity....................................................................................................41

6.3 EMC .............................................................................................................41

7 List of parts and recommended accessories..........................................................42

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