Siemens TC65, Hardware Interface Description

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TC65 Hardware Interface Description
Strictly confidential / Draft
s
TC65_HD_V00.521 Page 3 of 99 24.05.2005
Contents
0 Document History .........................................................................................................7
1 Introduction ...................................................................................................................8
1.1 Related Documents ...............................................................................................8
1.2 Terms and Abbreviations.......................................................................................9
1.3 Type Approval......................................................................................................12
1.4 Safety Precautions...............................................................................................14
2 Product Concept .........................................................................................................16
2.1 Key Features at a Glance ....................................................................................16
2.2 TC65 System Overview .......................................................................................19
2.3 Circuit Concept ....................................................................................................20
3 Application Interface...................................................................................................21
3.1 Operating Modes .................................................................................................22
3.2 Power Supply.......................................................................................................24
3.2.1 Minimizing Power Losses ......................................................................24
3.2.2 Measuring the Supply Voltage V
BATT+
....................................................25
3.2.3 Monitoring Power Supply by AT Command ...........................................25
3.3 Power Up / Power Down Scenarios.....................................................................26
3.3.1 Turn on TC65.........................................................................................26
3.3.1.1 Turn on TC65 Using Ignition Line IGT ...................................................26
3.3.1.2 Turn on TC65 Using the VCHARGE Signal...........................................28
3.3.1.3 Reset TC65 via AT+CFUN Command ...................................................29
3.3.1.4 Reset or Turn off TC65 in Case of Emergency......................................29
3.3.2 Turn off TC65.........................................................................................30
3.3.2.1 Turn off TC65 Using AT Command .......................................................30
3.3.2.2 Leakage Current in Power Down Mode .................................................31
3.3.3 Automatic Shutdown ..............................................................................32
3.3.3.1 Temperature Dependent Shutdown.......................................................32
3.3.3.2 Temperature Control during Emergency call .........................................33
3.3.3.3 Undervoltage Shutdown if Battery NTC is Present ................................33
3.3.3.4 Undervoltage Shutdown if no Battery NTC is Present ...........................34
3.3.3.5 Overvoltage Shutdown...........................................................................34
3.4 Automatic GPRS Multislot Class Change............................................................35
3.5 Charging Control..................................................................................................36
3.5.1 Hardware Requirements ........................................................................36
3.5.2 Software Requirements .........................................................................36
3.5.3 Battery Pack Requirements ...................................................................37
3.5.4 Batteries Recommended for Use with TC65..........................................38
3.5.5 Charger Requirements...........................................................................39
3.5.6 Implemented Charging Technique.........................................................39
3.5.7 Operating Modes during Charging.........................................................40
3.6 Summary of State Transitions (Except SLEEP Mode).........................................42
3.7 RTC Backup ........................................................................................................43
3.8 SIM Interface .......................................................................................................44
3.9 Serial Interface ASC0 ..........................................................................................45
3.10 Serial Interface ASC1 ..........................................................................................47
3.11 USB Interface ......................................................................................................49
3.11.1 Installing the USB Modem Driver...........................................................50
3.12 I
2
C Interface .........................................................................................................52
3.13 Audio Interfaces...................................................................................................54