Specifications

WM_PRJ_Q2501_PTS_002 - 001
March 2004
confidential ©
Page: 4 / 79
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Contents
Document Information......................................................................... 2
Overview ............................................................................................. 3
Contents.............................................................................................. 4
Table of figures ................................................................................... 6
Cautions .............................................................................................. 8
Trademarks ......................................................................................... 8
1 References.................................................................................... 9
1.1 Reference Documents .............................................................................9
1.2 Glossary ..................................................................................................9
1.3 Abbreviations ........................................................................................10
2 General Information .................................................................... 14
2.1 Features ................................................................................................14
2.2 Functional architecture..........................................................................16
3 Functional Design ....................................................................... 17
3.1 Power supply part .................................................................................17
3.1.1 Main power supply and ground plane ...........................................17
3.1.2 RTC Back-up supply ......................................................................20
3.2 Common GSM/GPS part........................................................................22
3.2.1 Module activation function (ON/~OFF)...........................................22
3.2.2 Alternative download control function (BOOT)...............................22
3.2.3 Reset function (~RST)....................................................................23
3.2.4 Activity status indication function (FLASH_LED & GPS_TIMEPULSE)24
3.3 GSM/GPRS Base Band part ...................................................................25
3.3.1 GSM serial links.............................................................................25
3.3.2 General purpose I/O .......................................................................28
3.3.3 Peripheral buses ............................................................................29
3.3.4 SIM interface .................................................................................31
3.3.5 Keyboard interface.........................................................................35
3.3.6 Audio interface ..............................................................................37
3.3.7 Buzzer interface.............................................................................43
3.3.8 Digital Power Supply for External Devices (VCC)............................44
3.3.9 GSM transmission activity status ..................................................44
3.3.10 GSM Base Band Activation indicator .............................................45
3.3.11 External Interrupt...........................................................................45
3.3.12 Auxiliary Analog Signals ................................................................46
3.4 GPS Base Band part ..............................................................................47
3.4.1 GPS activation function .................................................................47