Product Info

LTE Standard Module Series
EC21_Series_Mini_PCIe_Hardware_Design
8
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Contents
Safety Information......................................................................................................................................................3
About the Document..................................................................................................................................................5
Contents........................................................................................................................................................................8
Table Index.................................................................................................................................................................10
Figure Index............................................................................................................................................................... 12
1 Introduction....................................................................................................................................................... 13
1.1. Special Mark..........................................................................................................................................15
2 Product Overview.............................................................................................................................................16
2.1. General Description..............................................................................................................................16
2.2. Description of Module Series..............................................................................................................16
2.3. Key Features......................................................................................................................................... 18
2.4. Functional Diagram.............................................................................................................................. 20
3 Application Interfaces.....................................................................................................................................21
3.1. Pin Assignment..................................................................................................................................... 21
3.2. Pin Description...................................................................................................................................... 22
3.3. Operating Modes.................................................................................................................................. 25
3.4. Power Saving........................................................................................................................................ 26
3.4.1. Sleep Mode................................................................................................................................. 26
3.4.2. Airplane Mode.............................................................................................................................26
3.5. Power Supply........................................................................................................................................ 26
3.6. (U)SIM Interface....................................................................................................................................27
3.7. USB Interface........................................................................................................................................ 29
3.8. UART Interface......................................................................................................................................31
3.9. PCM and I2C Interfaces...................................................................................................................... 32
3.10. Control and Indication Interfaces....................................................................................................... 34
3.10.1. RI...................................................................................................................................................35
3.10.2. DTR...............................................................................................................................................35
3.10.3. W_DISABLE#............................................................................................................................. 35
3.10.4. PERST#....................................................................................................................................... 36
3.10.5. LED_WWAN#............................................................................................................................. 36
3.10.6. WAKE#.........................................................................................................................................37
4 GNSS....................................................................................................................................................................39
4.1. General Description..............................................................................................................................39
4.2. GNSS Performance..............................................................................................................................39
4.3. GNSS Frequency..................................................................................................................................40
5 Antenna Connection........................................................................................................................................41
5.1. Antenna Connectors............................................................................................................................ 41
5.1.1. Operating Frequency.................................................................................................................41
5.2. Antenna Design Requirements.......................................................................................................... 42