Download Siemens XT75 Specifications

XT65/XT75 Hardware Interface Description
Contents
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Contents
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Document History.................................................................................................................................... 9
1
Introduction............................................................................................................................................ 11
1.1
Related Documents....................................................................................................................... 11
1.2
Terms and Abbreviations .............................................................................................................. 12
1.3
Regulatory and Type Approval Information................................................................................... 15
1.3.1
Directives and Standards............................................................................................... 15
1.3.2
SAR requirements specific to portable mobiles ............................................................. 16
1.3.3
SELV Requirements ...................................................................................................... 17
1.3.4
Safety Precautions......................................................................................................... 17
2
Product Concept.................................................................................................................................... 19
2.1
Key Features at a Glance.............................................................................................................. 19
2.2
XT65/XT75 System Overview ....................................................................................................... 23
2.3
Circuit Concept.............................................................................................................................. 24
3
GSM Application Interface .................................................................................................................... 26
3.1
Operating Modes........................................................................................................................... 27
3.2
Power Supply ................................................................................................................................ 28
3.2.1
Minimizing Power Losses .............................................................................................. 28
3.2.2
Measuring the Supply Voltage VBATT+............................................................................................................ 29
3.2.3
Monitoring Power Supply by AT Command................................................................... 29
3.3
Power-Up / Power-Down Scenarios.............................................................................................. 30
3.3.1
Turn on XT65/XT75 ....................................................................................................... 30
3.3.1.1 Turn on XT65/XT75 Using Ignition Line IGT .................................................................. 30
3.3.1.2 Configuring the IGT Line for Use as ON/OFF Switch .................................................... 33
3.3.1.3 Turn on XT65/XT75 Using the VCHARGE Signal ......................................................... 33
3.3.1.4 Reset XT65/XT75 via AT+CFUN Command.................................................................. 34
3.3.1.5 Reset or Turn off XT65/XT75 in Case of Emergency .................................................... 34
3.3.1.6 Using EMERG_RST Signal to Reset Application(s) or External Device(s) ................... 34
3.3.2
Signal States after Startup............................................................................................. 35
3.3.3
Turn off XT65/XT75 ....................................................................................................... 36
3.3.3.1 Turn off XT65/XT75 Using AT Command ...................................................................... 36
3.3.3.2 Leakage Current in Power-Down Mode......................................................................... 37
3.3.3.3 Turn on/off XT65/XT75 Applications with Integrated USB ............................................. 38
3.3.4
Automatic Shutdown...................................................................................................... 38
3.3.4.1 Thermal Shutdown......................................................................................................... 38
3.3.4.2 Temperature Control during Emergency call ................................................................. 39
3.3.4.3 Undervoltage Shutdown if Battery NTC is Present ........................................................ 39
3.3.4.4 Undervoltage Shutdown if no Battery NTC is Present ................................................... 40
3.3.4.5 Overvoltage Shutdown .................................................................................................. 40
3.4
Automatic EGPRS/GPRS Multislot Class Change........................................................................ 41
3.5
Charging Control ........................................................................................................................... 41
3.5.1
Hardware Requirements................................................................................................ 41
3.5.2
Software Requirements ................................................................................................. 41
3.5.3
Battery Pack Requirements ........................................................................................... 42
3.5.4
Batteries Tested for Use with XT65/XT75 ..................................................................... 43
3.5.5
Charger Requirements .................................................................................................. 44
XT65_XT75_HD_v01.001
Confidential / Released
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2007-1-8