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Contents
1GENERAL DESCRIPTION OF MODULE........................................................................1
1.1INTRODUCTION OF MODULE’S FUNCTIONS.....................................................1
1.2MODULE’S PRINCIPLE DIAGRAM .......................................................................2
1.3ABBREVIATIONS...................................................................................................3
2DESCRIPTIONS OF MODULE’S EXTERNAL INTERFACES ........................................5
2.1DEFINITIONS OF MODULE’S INTERFACES........................................................5
2.2ANTENNA INTERFACE .........................................................................................6
3MODULE’S ELECTRICAL CHARACTERISTICS ...........................................................8
3.1DESCRIPTIONS OF LEVELS OF INTERFACE SIGNALS.....................................8
3.1.1RESET..........................................................................................................8
3.1.2SIM CARD INTERFACE ...............................................................................8
3.1.3AUDIO INTERFACE .....................................................................................9
3.1.4NETWORK SIGNAL INDICATION................................................................9
3.2MODULE POWER CONSUMPTION....................................................................10
3.3RELIABILITY CHARACTERISTICS .....................................................................10
4INTERFACE CIRCUIT DESIGN ....................................................................................11
4.1RESET AND POWER DESIGN ............................................................................11
4.2UART INTERFACE...............................................................................................12
4.3SIM CARD INTERFACE .......................................................................................13
4.4AUDIO INTERFACE .............................................................................................14
5MECHANICAL DIMENSIONS .......................................................................................15
5.1APPEARANCE DIAGRAM ...................................................................................15
5.2MODULE ASSEMBLY DIAGRAM ........................................................................15
5.3PCB DIMENSIONS ..............................................................................................16
6ANTENNA INTERFACE................................................................................................16
6.1ANTENNA INSTALLATION ..................................................................................17
6.2ANTENNA PAD ....................................................................................................17
6.3ANTENNA CONNECTOR ....................................................................................17
