User's Manual

LE920A4 HW User Guide General Product Description
Doc#: 1VV0301261 Block Diagram
Rev. 4.3 Page 15 of 123 2017-12-07
Function Features
Major software
features
• Advanced security features
o Boot integrity of firmware up to customer applications
o Disable/secure re-enable of debug
o Embedded security
• FOTA (optional)
• Telit Unified AT command set
• Java VM (optional) with the following features:
o Rich and standardized application environment for
customer applications
o State-of-the-art and high performance Java SE8
embedded Virtual Machine
o Oracle Java SE8 Embedded, Compact Profile 1
o JIT-enabled
Form factor Form factor (40x34mm), accommodating the multiple RF bands in
each region variant
Environment
and quality
requirements
The entire module is designed and qualified by Telit for satisfying the
environment and quality requirements for use in automotive
applications
2
.
Single supply
module
The module generates all its internal supply voltages.
RTC RTC is maintained as long as VBATT is supplied
Operating
temperature
Range -40 °C to +85 °C
(conditions as defined in Section 2.5.1,Temperature Range)
Block Diagram
Figure 1 shows an overview of the internal architecture of the module.
It includes the following sub-functions:
• Application processor, Modem subsystem and Location processing with their
external interfaces. These three functions are contained in a single SOC.
• RF front end, including antenna diagnosis circuitry
• Analog Audio codec for attaching external speaker amplifier and microphone
• Rich IO interfaces. Depending on which of the module’s software features are
enabled, some of its interfaces that are exported through multiplexing may be used
internally and thus may not be usable by the application.
• PMIC with the RTC function inside
2
In accordance with Telit’s Robustness Validation, using AEC-Q100-defined qualification tests