Product Info
LTE Module Series
EG91 Hardware Design
EG91_Hardware_Design 5 / 93
3.12. PCM and I2C Interfaces ........................................................................................................ 48
3.13. SPI Interface ......................................................................................................................... 51
3.14. Network Status Indication ..................................................................................................... 51
3.15. STATUS ................................................................................................................................ 52
3.16. ADC Interface ....................................................................................................................... 53
3.17. Behaviors of RI ..................................................................................................................... 54
3.18. USB_BOOT Interface............................................................................................................ 55
4 GNSS Receiver ................................................................................................................................ 57
4.1. General Description .............................................................................................................. 57
4.2. GNSS Performance .............................................................................................................. 57
4.3. Layout Guidelines ................................................................................................................. 58
5 Antenna Interfaces .......................................................................................................................... 59
5.1. Main/Rx-diversityAntenna Interfaces..................................................................................... 59
5.1.1. Pin Definition ................................................................................................................ 59
5.1.2. Operating Frequency ................................................................................................... 59
5.1.3. Reference Design of RF Antenna Interface ................................................................. 60
5.1.4. Reference Design of RF Layout ................................................................................... 61
5.2. GNSS Antenna Interface ....................................................................................................... 63
5.3. Antenna Installation .............................................................................................................. 64
5.3.1. Antenna Requirement .................................................................................................. 64
5.3.2. Recommended RF Connector for Antenna Installation ................................................ 65
6 Electrical, Reliability and RadioCharacteristics ........................................................................... 67
6.1. Absolute Maximum Ratings .................................................................................................. 67
6.2. Power Supply Ratings ........................................................................................................... 67
6.3. Operation and Storage Temperatures .................................................................................. 68
6.4. Current Consumption ............................................................................................................ 69
6.5. RF Output Power .................................................................................................................. 76
6.6. RF Receiving Sensitivity ....................................................................................................... 77
6.7. Electrostatic Discharge ......................................................................................................... 79
6.8. Thermal Consideration .......................................................................................................... 79
7 Mechanical Dimensions.................................................................................................................. 82
7.1. Mechanical Dimensions of the Module.................................................................................. 82
7.2. Recommended Footprint ....................................................................................................... 84
7.3.
Design Effect Drawings of the Module .................................................................................. 85
8 Storage, Manufacturing and Packaging ........................................................................................ 86
8.1. Storage ................................................................................................................................. 86
8.2. Manufacturing and Soldering ................................................................................................ 87
8.3. Packaging ............................................................................................................................. 88
9 Appendix A References .................................................................................................................. 90
10 Appendix B GPRS Coding Schemes ............................................................................................. 94