Telit Wireless Solutions LE910C1-NAD Guide

LE910Cx
Hardware Design Guide
1VV0301298 Rev. 40 – 2023-03-16
Telit Technical Documentation

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APPLICABILITY TABLE
This documentation applies to the following products:
PRODUCTS DESCRIPTION
LE910C1-NA North America – AT&T with global roaming
LE910C1-NAD North America – AT&T with global roaming and Data only
LE910C1-NS North America - Sprint variant
LE910C1-AP APAC variant CAT1 variant
LE910C4-AP APAC variant CAT4 variant
LE910C1-APX APAC variant CAT1 variant
LE910C4-EU Europe CAT4 variant
LE910C1-EU Europe CAT1 variant
LE910C1-EUX Europe CAT1 variant
LE910C4-NF North America CAT4 variant
LE910C4-NFD North America CAT4 variant and Data only
LE910C1-NF North America CAT1 variant
LE910C1-NFD North America CAT1 variant and Data only
LE910C1-SA North America CAT1 variant – AT&T
LE910C1-SAD North America CAT1 variant – AT&T and Data only
LE910C1-SAX North America CAT1 variant – AT&T
LE910C1-SAXD North America CAT1 variant – AT&T and Data only
LE910C1-ST North America CAT1 variant – T Mobile
LE910C1-SV North America CAT1 variant – Verizon
LE910C1-SVX North America CAT1 variant – Verizon
LE910C1-LA Latin America CAT1 variant
LE910C4-LA Latin America CAT4 variant
LE910C4-CN China CAT4 variant
LE910C1-WWX Worldwide CAT1 variant
LE910C4-WWX Worldwide CAT4 variant
LE910C1-WWXD Worldwide CAT1 variant and Data only
LE910C4-WWXD Worldwide CAT4 variant and Data only
Table 1: Applicability table

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Note: ‘X’ means ThreadX OS in LE910C1-EUX, LE910C1-SAX(D),
LE910C1-SVX , LE910Cx-WWX(D) and LE910C1-APX. The other
models which don’t have the letter ‘X’ are Linux OS.
Note: Data only variants share the same HW of related voice variants
and the voice features are disabled by SW.

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CONTENTS
APPLICABILITY TABLE 2
CONTENTS 4
1. INTRODUCTION 10
Scope 10
Audience 10
Contact Information, Support 10
Symbol Conventions 11
Related Documents 11
2. GENERAL PRODUCT DESCRIPTION 13
Overview 13
Applications 14
General Functionality and Main Features 14
Block Diagram 16
Environmental Requirements 18
2.5.1. Temperature Range 18
2.5.2. RoHS Compliance 18
Operating Frequency Bands 18
2.6.1. RF Bands per Regional Variant 18
2.6.2. Reference Table of RF Bands Characteristics 20
RF Parameters 23
2.7.1. Sensitivity 23
2.7.2. Output power 24
Mechanical Specifications 25
2.8.1. Dimensions 25
2.8.2. Weight 25
3. MODULE CONNECTIONS 26
Pin-out 26
Signals That Must Be Connected 34
LGA Pads Layout 35
Backward Compatibility to xE910 Family 35
4. ELECTRICAL SPECIFICATIONS 37

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Absolute Maximum Ratings – Not Operational 37
Recommended Operating Conditions 37
Logic Level Specifications 38
4.3.1. 1.8V Pads - Absolute Maximum Ratings 38
4.3.2. 1.8V Standard GPIOs 38
4.3.3. 1.8V SD Card Pads 39
4.3.4. 1.8V SIM Card Pads 39
4.3.5. Dual Voltage Pads - Absolute Maximum Ratings 40
4.3.6. SD Card Pads @ 2.95V 40
4.3.7. SIM Card Pads @2.95V 40
5. HARDWARE COMMANDS 42
Turning on the LE910Cx Module 42
Initialization and Activation State 42
Turning off the LE910Cx Module 46
5.3.1. Shutdown by Software Command 47
5.3.2. Hardware Shutdown 47
5.3.3. Unconditional Hardware Shutdown 48
Powering OFF the Module 49
Fast Power Down 50
5.5.1. Fast Shut Down by Hardware 50
5.5.2. Fast Shut Down by Software 53
6. POWER SUPPLY 54
Power Supply Requirements 54
Power Consumption 54
General Design Rules 56
6.3.1. Electrical Design Guidelines 57
6.3.1.1. + 5V Input Source Power Supply – Design Guidelines 57
6.3.1.2. + 12V Input Source Power Supply – Design Guidelines 58
6.3.1.3. Battery Source Power Supply – Design Guidelines 59
6.3.2. Thermal Design Guidelines 60
6.3.3. Power Supply PCB Layout Guidelines 61
7. ANTENNA(S) 63
GSM/WCDMA/TD-SCDMA/LTE Antenna Requirements 63

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GSM/WCDMA/TD-SCDMA/LTE Antenna – PCB Line Guidelines 64
GSM/WCDMA/LTE Antenna – Installation Guidelines 65
Antenna Diversity Requirements 65
GNSS Antenna Requirements 66
7.5.1. Combined GNSS Antenna 67
7.5.2. Linear and Patch GNSS Antenna 67
7.5.3. Front End Design Considerations 67
7.5.4. GNSS Antenna – PCB Line Guidelines 68
7.5.5. GNSS Antenna – Installation Guidelines 68
8. HARDWARE INTERFACES 69
USB Port 69
HSIC Interface (Optional) 71
SGMII Interface 71
8.3.1. Ethernet Control interface 71
Serial Ports 72
8.4.1. Modem Serial Port 1 Signals 72
8.4.2. Modem Serial Port 2 74
8.4.3. RS232 Level Translation 75
Peripheral Ports 76
8.5.1. SPI – Serial Peripheral Interface 76
8.5.2. I2C - Inter-integrated Circuit 77
8.5.3. SD/MMC Card Interface 78
8.5.4. WiFi SDIO Interface 79
Audio Interface 80
8.6.1. Digital Audio 80
8.6.1.1. Short Frame Timing Diagrams 82
8.6.1.2. Long Frame Timing Diagrams 83
8.6.1.3. I2S Digital Audio Diagram 85
General Purpose I/O 86
8.7.1. Using a GPIO Pad as Input 88
8.7.2. Using a GPIO Pad as an interrupt / Wakeup source 89
8.7.3. Using a GPIO Pad as Output 89
9. MISCELLANEOUS FUNCTIONS 90
Indication of Network Service Availability 90

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Indication of Software Ready 91
RTC – Real Time Clock 91
VAUX Power Output 91
ADC Converter 91
9.5.1. Description 91
9.5.2. Using the ADC Converter 92
Using the Temperature Monitor Function 92
GNSS Characteristics 92
10. MOUNTING THE MODULE ON YOUR BOARD 94
General 94
Finishing & Dimensions 94
Recommended Footprint for the Application 100
Stencil 104
PCB Pad Design 104
Recommendations for PCB Pad Dimensions (mm) 104
Solder Paste 105
10.7.1. Solder Reflow 105
10.7.2. Cleaning 106
11. APPLICATION GUIDE 108
Debug of the LE910Cx Module in Production 108
Bypass Capacitor on Power Supplies 108
SIM Interface 109
11.3.1. SIM Schematic Example 109
EMC Recommendations 110
Download and Debug Port 110
11.5.1. Recovery Boot Mode 111
12. PACKING SYSTEM 112
Packing System – Tray 112
Tape & Reel 115
Moisture Sensitivity 120
13. CONFORMITY ASSESSMENT ISSUES 121
Approvals Compliance Summary 121

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APAC Approvals 123
13.2.1. Australia RCM 123
13.2.2. Japan JRL/JTBL Regulatory Notices 123
13.2.3. Taiwan NCC Regulatory Notices 123
EMEA Approvals 124
13.3.1. EU RED Declaration of Conformity 124
13.3.1.1. RED Antennas 124
13.3.2. UK UKCA Declaration of Conformity 125
Americas Approvals 125
13.4.1. USA FCC Approval 125
13.4.1.1. FCC Certificates 125
13.4.1.2. Applicable FCC Rules 126
13.4.1.3. FCC Regulatory Notices 126
13.4.1.4. FCC Antenna info 128
Canada ISED Approval 130
13.5.1.1. ISED Database 130
13.5.1.2. Applicable ISED Rules 130
13.5.1.3. ISED Regulatory Notices 131
Brazil ANATEL Regulatory Notices 135
Bolivia ATT Regulatory Notices 135
PERU MTC Regulatory Notices 135
Colombia CRC Regulatory Notices 135
Paraguay CONATEL Regulatory Notices 136
Argentina RAMATEL Regulatory Notices (former ENACOM)136
14. PRODUCT AND SAFETY INFORMATION 138
Copyrights and Other Notices 138
14.1.1. Copyrights 138
14.1.2. Computer Software Copyrights 138
Usage and Disclosure Restrictions 139
14.2.1. License Agreements 139
14.2.2. Copyrighted Materials 139
14.2.3. High Risk Materials 139
14.2.4. Trademarks 139
14.2.5. 3rd Party Rights 140

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14.2.6. Waiver of Liability 140
Safety Recommendations 140
15. GLOSSARY 142
16. DOCUMENT HISTORY 143

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1. INTRODUCTION
Scope
This document introduces the Telit LE910Cx module and presents possible and
recommended hardware solutions for the development of a product based on this
module. All the features and solutions described in this document are applicable to all
LE910Cx variants listed in the applicability table.
If a specific feature is applicable to a specific product only, it will be clearly marked.
Note: LE910Cx refers to all modules listed in the Applicability Table.
This document takes into account all the basic functions of a wireless module; it suggests
a valid hardware solution for each function and points out incorrect solutions and
common errors to be avoided.
This document cannot include every hardware solution or every product that can be
designed. Avoiding invalid solutions must be considered mandatory. Where the
suggested hardware configurations are not be considered mandatory, the information
provided should be used as a guide and a starting point for the proper development of
the product with the Telit LE910Cx module.
Note: The integration of the GSM/GPRS/EGPRS/WCDMA/HSPA+/LTE
LE910Cx cellular module within a user application must be done
according to the design rules described in this manual.
Audience
This document is intended for Telit customers, especially system integrators, about to
implement their applications using the Telit LE910Cx module.
Contact Information, Support
For general contact, technical support services, technical questions and report
documentation errors, contact Telit Technical Support at:
 [email protected]
 [email protected]
 [email protected]