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TC65 Hardware Interface Description

Confidential / Released

TC65_HD_V02.000 Page 3 of 120 08.06.2006

Contents

0 Document History ...................................................................................................... 7

1 Introduction ...............................................................................................................10

1.1 Related Documents............................................................................................10

1.2 Terms and Abbreviations ...................................................................................11

1.3 Type Approval....................................................................................................14

1.4 Safety Precautions.............................................................................................16

2 Product Concept .......................................................................................................18

2.1 Key Features at a Glance ..................................................................................18

2.2 TC65 System Overview......................................................................................21

2.3 Circuit Concept ..................................................................................................22

3 Application Interface.................................................................................................23

3.1 Operating Modes ...............................................................................................24

3.2 Power Supply.....................................................................................................26

3.2.1 Minimizing Power Losses .....................................................................26

3.2.2 Measuring the Supply Voltage V

BATT+

...................................................27

3.2.3 Monitoring Power Supply by AT Command ..........................................27

3.3 Power Up / Power Down Scenarios....................................................................28

3.3.1 Turn on TC65 .......................................................................................28

3.3.1.1 Turn on TC65 Using Ignition Line IGT ..................................................28

3.3.1.2 Configuring the IGT Line for Use as ON/OFF Switch ...........................31

3.3.1.3 Turn on TC65 Using the VCHARGE Signal..........................................32

3.3.1.4 Reset TC65 via AT+CFUN Command..................................................33

3.3.1.5 Reset or Turn off TC65 in Case of Emergency.....................................33

3.3.1.6 Using EMERG_RST Signal to Reset Application(s) or External Device(s)

.............................................................................................................

3.3.2 Signal States after Startup....................................................................34

3.3.3 Turn off TC65.......................................................................................36

3.3.3.1 Turn off TC65 Using AT Command ......................................................36

3.3.3.2 Leakage Current in Power Down Mode ................................................37

3.3.3.3 Turn on/off TC65 Applications with Integrated USB..............................38

3.3.4 Automatic Shutdown.............................................................................39

3.3.4.1 Thermal Shutdown ...............................................................................39

3.3.4.2 Temperature Control during Emergency call ........................................40

3.3.4.3 Undervoltage Shutdown if Battery NTC is Present ...............................40

3.3.4.4 Undervoltage Shutdown if no Battery NTC is Present ..........................41

3.3.4.5 Overvoltage Shutdown .........................................................................41

3.4 Automatic GPRS Multislot Class Change...........................................................42

3.5 Charging Control................................................................................................43

3.5.1 Hardware Requirements.......................................................................43

3.5.2 Software Requirements........................................................................43

3.5.3 Battery Pack Requirements..................................................................44

3.5.4 Charger Requirements .........................................................................45

3.5.5 Implemented Charging Technique........................................................45

3.5.6 Operating Modes during Charging........................................................46

3.6 Power Saving.....................................................................................................48

3.6.1 Network Dependency of SLEEP Modes ...............................................48

3.6.2 Timing of the CTSx Signal in CYCLIC SLEEP Mode 7 .........................49

3.6.3 Timing of the RTSx Signal in CYCLIC SLEEP Mode 9 .........................49

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