Product Info

LTE Standard Module Series
EC21 Mini PCIe Hardware Design
EC21_Mini_PCIe_Hardware_Design 5 / 64
Contents
About the Document ................................................................................................................................ 2
Contents .................................................................................................................................................... 5
Table Index ............................................................................................................................................... 7
Figure Index .............................................................................................................................................. 8
1 Introduction ....................................................................................................................................... 9
1.1. Safety Information ................................................................................................................. 10
2 Product Concept ............................................................................................................................. 14
2.1. General Description .............................................................................................................. 14
2.2. Description of Product Series ................................................................................................ 15
2.3. Key Features ......................................................................................................................... 16
2.4. Functional Diagram ............................................................................................................... 19
3 Application Interfaces ..................................................................................................................... 20
3.1. Pin Assignment ..................................................................................................................... 20
3.2. Pin Description ...................................................................................................................... 21
3.3. Power Supply ........................................................................................................................ 24
3.4. (U)SIM Interface .................................................................................................................... 25
3.5. USB Interface ........................................................................................................................ 27
3.6. UART Interface ..................................................................................................................... 29
3.7. PCM and I2C Interfaces ........................................................................................................ 29
3.8. Control and Indicator Signals ................................................................................................ 32
3.8.1. RI Signal ...................................................................................................................... 33
3.8.2. DTR Signal .................................................................................................................. 33
3.8.3. W_DISABLE# Signal ................................................................................................... 33
3.8.4. PERST# Signal ............................................................................................................ 34
3.8.5. LED_WWAN# Signal ................................................................................................... 34
3.8.6. WAKE# Signal ............................................................................................................. 35
4 GNSS Receiver ................................................................................................................................ 36
5 Antenna Connection ....................................................................................................................... 37
5.1. Operating Frequency ............................................................................................................ 37
5.2. GNSS Frequency .................................................................................................................. 38
5.3. GNSS Performance .............................................................................................................. 39
5.4. Antenna Requirements ......................................................................................................... 40
5.4.1. Antenna Requirements ................................................................................................ 40
5.4.2. Antenna Connectors and Mating Plugs ....................................................................... 41
6 Electrical, Reliability and Radio Characteristics .......................................................................... 43
6.1. General Description .............................................................................................................. 43
6.2. Power Supply Requirements ................................................................................................. 43
6.3. I/O Requirements .................................................................................................................. 44