User's Manual
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Electronics
LTE Module
11
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Table Of Contents
Copyright
Attention
Trademark
Versions
Applicable Model List
Foreword
Introduction
Reference Standard
Product Overview
Description
Specifications
Appearance
Structure
Dimension Diagram of Structure
Recommended PCB Layout Design
Hardware Introduction
Pin Definition
Pin Map
Description of Pins
Hardware Interface
Power Interface
Power Supply
VSD2_1V8
VRTC
Power on/off and Reset Signal
Power on /off Signal
Power on
Power off
The Recommended Design of Power on/off
RESET Signal
Status Indicating Signals
CORE DUMP Indicating
LPG Signal
WAKEUP_HOST Signal
PA_BLANKING Signal
Interrupt Control Signal
WAKE_UP Signal
W_DISABLE# Signal
Android & Linux / Win8 & Win10 Dual Systems Switc
USB Interface
USB Interface Definition
USB Interface Application
UART Interface
UART Interface Description
UART Interface Application
USIM Interface
USIM Pins
USIM Interface Design
“Normally Closed” SIM Card Circuit Design
“Normally Open” SIM Circuit Design
Highlights for USIM Design
USIM Hot-Plugging
Hardware Connection
Software Setup
Digital Audio
I2S Interface
PCM Mode Description
I2C Interface
Clock Interface
Other Interfaces
Electrical and Environmental Characteristic
Electrical Characteristic
Environmental Characteristic
RF Interface
RF PCB Design
Wire Routing Principle
Impedance
Antenna Design
Main Antenna Design Requirements
L81
1
-EA
Module
Hardware
User
Manual
Page
16
of
43
Figure
3-
3
Struc
ture
Diagram
of
PCB
Layout
1
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14
15
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18
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