Table Of Contents; Contents - SimCom SIM68R Hardware Design

Contents.................................................................................................................................................................... 3
Version History ........................................................................................................................................................ 7
1 Introduction....................................................................................................................................................... 8
2 SIM68R Overview............................................................................................................................................. 8
2.1 SIM68R Functional Diagram ................................................................................................................... 9
2.2 GNSS Performance................................................................................................................................... 9
2.3 General features...................................................................................................................................... 10
3 Package Information ...................................................................................................................................... 12
3.1 Pin out Diagram...................................................................................................................................... 12
3.2 Pin Description ....................................................................................................................................... 12
3.3 Package Dimensions............................................................................................................................... 14
3.4 SIM68R Recommended PCB Decal....................................................................................................... 15
4 Application Interface...................................................................................................................................... 16
4.1 Power Management ................................................................................................................................ 16
4.1.1 Power Input ......................................................................................................................................... 16
4.1.2 Starting SIM68R ................................................................................................................................. 16
4.1.3 Verification of SIM68R Start .............................................................................................................. 16
4.1.4 Power Saving Modes........................................................................................................................... 16
4.1.5 Operating Mode .................................................................................................................................. 17
4.1.5.1 Full on Mode........................................................................................................................................ 17
4.1.5.2 Sleep Mode .......................................................................................................................................... 17
4.1.6 VCC_RF.............................................................................................................................................. 17
4.2 UART Interface ...................................................................................................................................... 17
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4.3 I C interface.......................................................................................................................................... 18
4.4 Timemark Output ................................................................................................................................... 18
4.5 DET_N ................................................................................................................................................... 18
4.6 A-GPS .................................................................................................................................................... 18
4.6.1 EPO ..................................................................................................................................................... 18
4.6.2 EASY MODE...................................................................................................................................... 19
4.6.3 SBAS and RTCM................................................................................................................................ 19
4.7 GNSS Antenna ....................................................................................................................................... 19
4.7.1 Antenna Interface ................................................................................................................................ 20
4.7.2 GNSS Antenna Choice Consideration ................................................................................................ 20
4.7.2.1 Passive Antenna ................................................................................................................................... 20
4.7.2.2 Active Antennas................................................................................................................................... 22
4.7.2.3 Active antenna bias power ................................................................................................................... 23
4.7.3 Active antenna supervisor ................................................................................................................... 23
4.7.3.1 Short circuit Detection ......................................................................................................................... 24
4.7.3.2 Open circuit Detection ......................................................................................................................... 24
5 Electrical, Reliability and Radio Characteristics......................................................................................... 26
5.1 Absolute Maximum Ratings................................................................................................................... 26
5.2 Recommended Operating Conditions..................................................................................................... 26
SIM68R_Hardware Design_V1.02

Contents

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Smart Machine Smart Decision
2013-01-22