Telit Wireless Solutions LE910C1-NAD Leitfaden

LE910Cx

Hardware Design Guide

1VV0301298 Rev. 40 – 2023-03-16

Telit Technical Documentation

LE910Cx Hardware Design Guide

1VV0301298 Rev.37 Page 2 of 149 2023-03-16

Not Subject to NDA

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.

LE910Cx Hardware Design Guide

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Not Subject to NDA

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

LE910Cx Hardware Design Guide

1VV0301298 Rev.40 Page 10 of 149 2023-03-16

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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]

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