User's Guide

LM940 HW Design Guide
1VV0301352 Rev. 2 Page 9 of 68 2017-07-19
1. INTRODUCTION
Scope
This document introduces the Telit LM940 module and presents possible and
recommended hardware solutions for developing a product based on the LM940 module.
All the features and solutions detailed in this document are applicable to all LM940 variants,
where “LM940” refers to the variants listed in the Applicability Table.
If a specific feature is applicable to a specific product only, it will be clearly marked.
Information – LM940 refers to all modules listed in the Applicability
Table.
This document takes into account all the basic functions of a wireless module; a valid
hardware solution is suggested for each function, and incorrect solutions and common
errors to be avoided are pointed out.
Obviously, this document cannot embrace every hardware solution or every product that
can be designed. Where the suggested hardware configurations need not be considered
mandatory, the information given should be used as a guide and a starting point for properly
developing your product with the Telit LM940 module.
Information – The integration of the WCDMA/HSPA+/LTE LM940
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 LM940 module.
Contact Information, Support
For general contact, technical support services, technical questions and report
documentation errors contact Telit Technical Support at:
 [e-mail]
 [e-mail]
 [e-mail]
 [e-mail]