Cinterion MC75i, Hardware Interface Description

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MC75i Hardware Interface Description
Contents
122
MC75i_HD_v01.100a Page 3 of 122 2009-08-13
Confidential / Released
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Contents
0 Document History ...................................................................................................... 8
1 Introduction ............................................................................................................... 10
1.1 Related Documents ......................................................................................... 10
1.2 Terms and Abbreviations ................................................................................. 10
1.3 Regulatory and Type Approval Information ..................................................... 14
1.3.1
Directives and Standards.................................................................... 14
1.3.2 SAR requirements specific to portable mobiles .................................. 16
1.3.3 Safety Precautions.............................................................................. 17
2 Product Concept ....................................................................................................... 18
2.1 Key Features at a Glance ................................................................................ 18
2.2 MC75i System Overview.................................................................................. 21
2.3 Circuit Concept ................................................................................................ 22
3 Application Interface................................................................................................. 23
3.1 Operating Modes ............................................................................................. 24
3.2 Power Supply................................................................................................... 25
3.2.1
Minimizing Power Losses ................................................................... 25
3.2.2 Measuring the Supply Voltage VBATT+ ............................................. 26
3.2.3 Monitoring Power Supply by AT Command ........................................ 26
3.3 Power Up / Power Down Scenarios................................................................. 27
3.3.1
Turn on MC75i .................................................................................... 27
3.3.1.1
Turn on MC75i Using Ignition Line IGT ............................... 27
3.3.1.2 Configuring the IGT Line for Use as ON/OFF Switch.......... 30
3.3.1.3 Turn on MC75i Using the VCHARGE Signal....................... 30
3.3.1.4 Reset MC75i via AT+CFUN Command............................... 31
3.3.1.5 Reset or Turn off MC75i in Case of Emergency.................. 31
3.3.1.6 Using EMERG_OFF Signal to Reset Application(s) or
External Device(s)............................................................... 31
3.3.2 Signal States after Startup .................................................................. 32
3.3.3 Turn off MC75i .................................................................................... 34
3.3.3.1
Turn off MC75i Using AT Command.................................... 34
3.3.3.2 Turn on/off MC75i Applications with Integrated USB .......... 36
3.3.4 Automatic Shutdown ........................................................................... 36
3.3.4.1
Thermal Shutdown .............................................................. 37
3.3.4.2 Deferred Shutdown at Extreme Temperature Conditions.... 38
3.3.4.3 Undervoltage Shutdown ...................................................... 38
3.3.4.4 Overvoltage Shutdown ........................................................ 39
3.4 Automatic GPRS Multislot Class Change ........................................................ 40
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 MC75i .................................................. 43