Product Info

LTE-A Module Series
EM121R-GL Hardware Design
EM121R-GL Hardware Design 5 / 80
Contents
Safety Information ....................................................................................................................................... 3
About the Document ................................................................................................................................... 4
Contents ....................................................................................................................................................... 5
Table Index ................................................................................................................................................... 8
Figure Index ............................................................................................................................................... 10
1 Introduction ........................................................................................................................................ 12
1.1. Introduction ............................................................................................................................... 12
1.2. Reference Standard .................................................................................................................. 12
1.3. Special Mark ............................................................................................................................. 13
2 Product Concept ................................................................................................................................ 14
2.1. General Description .................................................................................................................. 14
2.2. Key Features ............................................................................................................................. 15
2.3. Functional Diagram ................................................................................................................... 18
2.4. Pin Assignment ......................................................................................................................... 19
2.5. Pin Description .......................................................................................................................... 20
2.6. Evaluation Board ....................................................................................................................... 24
3 Operating Characteristics ................................................................................................................. 25
3.1. Operating Modes ....................................................................................................................... 25
3.1.1. Sleep mode .................................................................................................................... 25
3.1.2. Airplane mode ................................................................................................................ 27
3.2. Communication Interface with the Host .................................................................................... 27
3.3. Power Supply ............................................................................................................................ 27
3.3.1. Decrease Voltage Drop .................................................................................................. 28
3.3.2. Reference Design for Power Supply .............................................................................. 29
3.4. Turn on ...................................................................................................................................... 29
3.5. Turn off ...................................................................................................................................... 31
3.6. Reset ......................................................................................................................................... 31
4 Application Interfaces ....................................................................................................................... 34
4.1. (U)SIM Interface ........................................................................................................................ 34
4.1.1. Pin definition of (U)SIM .................................................................................................. 34
4.1.2. (U)SIM Hot-plug ............................................................................................................. 35
4.1.3. Normally Closed (U)SIM Card Connector...................................................................... 36
4.1.4. Normally Open (U)SIM Card Connector ........................................................................ 37
4.1.5. (U)SIM Card Connector Without Hot-plug ..................................................................... 38
4.1.6. (U)SIM2 Card Connector ............................................................................................... 38
4.1.7. (U)SIM Design Notices................................................................................................... 39
4.2. USB Interface ............................................................................................................................ 39