Quectel EC25 Mini PCIe - Table of Contents; Contents

LTE Standard Module Series
EC25 Mini PCIe Hardware Design
EC25_Mini_PCIe_Hardware_Design 5 / 79
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 5
Table Index ................................................................................................................................................... 7
Figure Index ................................................................................................................................................. 9
1 Introduction ........................................................................................................................................ 10
1.1. Safety Information.................................................................................................................... 11
2 Product Concept ................................................................................................................................ 12
2.1. General Description ................................................................................................................. 12
2.2. Description of Module Series .................................................................................................. 13
2.3. Key Features ........................................................................................................................... 15
2.4. Functional Diagram ................................................................................................................. 17
3 Application Interfaces ....................................................................................................................... 18
3.1. Pin Assignment ........................................................................................................................ 18
3.2. Pin Description ......................................................................................................................... 19
3.3. Operating Modes ..................................................................................................................... 22
3.4. Power Saving ........................................................................................................................... 22
3.4.1. Sleep Mode .................................................................................................................... 22
3.4.2. Airplane Mode ................................................................................................................ 23
3.5. Power Supply ........................................................................................................................... 23
3.6. (U)SIM Interface ...................................................................................................................... 24
3.7. USB Interface .......................................................................................................................... 26
3.8. UART Interfaces ...................................................................................................................... 27
3.8.1. Main UART Interface ...................................................................................................... 27
3.8.2. COEX UART Interface* .................................................................................................. 28
3.9. PCM and I2C Interfaces .......................................................................................................... 29
3.10. Control and Indication Signals ................................................................................................. 32
3.10.1. RI Signal ......................................................................................................................... 32
3.10.2. DTR Signal ..................................................................................................................... 33
3.10.3. W_DISABLE# Signal ...................................................................................................... 33
3.10.4. PERST# Signal .............................................................................................................. 33
3.10.5. LED_WWAN# Signal ..................................................................................................... 34
3.10.6. WAKE# Signal ................................................................................................................ 35
4 GNSS Receiver ................................................................................................................................... 36
4.1. General Description ................................................................................................................. 36
4.2. GNSS Performance ................................................................................................................. 36
4.3. GNSS Frequency..................................................................................................................... 37
5 Antenna Connection .......................................................................................................................... 38
5.1. Antenna Connectors ................................................................................................................ 38
5.1.1. Operating Frequency ..................................................................................................... 38