User's Guide

LE920A4 HW User Guide General Product Description

Doc#: 1VV0301261 Block Diagram

Rev. 4.7.1 Page 16 of 124 2019-11-21

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

Figure 1: High-level Block Diagram

ANT

DIAG

Memories

Frontend

GNSS Antennna

GPIO

Cellular Antenna 1

Cellular Antenna 2

Microphone

Ear / Line out

PCM In/out

SIM

GNSS_Sync

Application

Processor

Modem

Location

HSICI2C

ANT

DIAG

USB2.0SGMIISPI

UART

JTAG

Audio

CODEC

2xSDIO

PMIC

VBATT

ADC

VBATT_PA

RTC