User Manual

GM47/48 Technical description
BA/SEM/MS 02:0004 Rev B
3
Contents
1 INTRODUCTION ...........................................................................................................5
1.1 OVERVIEW ...............................................................................................................5
1.2 FEATURES................................................................................................................6
1.2.1 Type of Mobile Station ......................................................................................6
1.2.2 SMS ................................................................................................................7
1.2.3 Voice calls .......................................................................................................7
1.2.4 Data.................................................................................................................7
1.2.5 SIM Card..........................................................................................................8
1.2.6 Power consumption ..........................................................................................8
1.2.7 Other features ..................................................................................................8
1.2.8 Development Kit...............................................................................................8
1.3 PRECAUTIONS...........................................................................................................9
1.4 ABBREVIATIONS ........................................................................................................9
2 MECHANICAL DESCRIPTION.....................................................................................11
2.1 INTERFACE DESCRIPTION..........................................................................................11
2.2 PHYSICAL DIMENSIONS.............................................................................................12
3 SYSTEM CONNECTOR INTERFACE...........................................................................13
3.1 OVERVIEW .............................................................................................................13
3.2 GENERAL ELECTRICAL AND LOGICAL CHARACTERISTICS................................................16
3.2.1 General Protection Requirements....................................................................16
3.3 GROUNDS ..............................................................................................................16
3.3.1 The Analogue Ground.....................................................................................17
3.3.2 The Digital Ground (DGND).............................................................................17
3.4 REGULATED POWER SUPPLY ....................................................................................17
3.4.1 Power Supply (VCC).......................................................................................18
3.5 ON/OFF AND EXTERNAL POWER SIGNALS..................................................................18
3.5.1 Module ON/OFF.............................................................................................18
3.5.2 External 2.75 V (VIO)......................................................................................19
3.6 ANALOGUE AUDIO ...................................................................................................19
3.6.1 Audio To Mobile Station (ATMS)......................................................................20
3.6.2 Audio From Mobile Station (AFMS)..................................................................22
3.7 MICROPHONE SIGNALS ............................................................................................22
3.8 SPEAKER SIGNALS ..................................................................................................23
3.9 DIGITAL AUDIO ........................................................................................................23
3.10 SERIAL DATA..........................................................................................................24
3.10.1 UART 1 (RS232) - RD, TD, RTS, CTS, DTR, DCD and RI.................................26
3.10.2 Serial Data Signals - RD, TD...........................................................................26
3.10.3 Control Signals - RTS, CTS, DTR, DCD, RI......................................................27
3.10.4 UART 2 - TD2, RD2........................................................................................29
3.10.5 UART 3 - TD3, RD3........................................................................................29
3.11 SIM CARD RELATED SIGNALS....................................................................................30
3.11.1 SIM Detection – SIM Presence........................................................................31
3.12 SERVICE/PROGRAMMING ..........................................................................................31
3.13 BUZZER .................................................................................................................32
3.14 LED......................................................................................................................32
3.15 TX_ON - BURST TRANSMISSION ...............................................................................33
3.16 TIMESTAMP ............................................................................................................33
3.17 REAL TIME CLOCK...................................................................................................34
4 ANTENNA CONNECTOR............................................................................................35