Mobiletek LYNO L710 User manual

L710 EVB User Manual
Version：V1.0
Date：2019-08-08
Shanghai Mobiletek Communication Ltd

L710 EVB User Manual
Copyright© Shanghai Mobiletek Communication Ltd 1
Notice
Some features of the product and its accessories described herein rely on the software installed,
capacities and settings of local network, and therefore may not be activated or may be limited by
local network operators or network service providers.
Thus, the descriptions herein may not exactly match the product or its accessories which you
purchase.Shanghai Mobiletek Communication Ltd reserves the right to change or modify any
information or specifications contained in this manual without prior notice and without any
liability.
Copyright
This document contains proprietary technical information which is the property of Shanghai
Mobiletek Communication Ltd. copying of this document and giving it to others and the using or
communication of the contents thereof, are forbidden without express authority. Offenders are
liable to the payment of damages. All rights reserved in the event of grant of patent or the
registration of a utility model or design. All specification supplied herein are subject to change
without notice at any time.
DISCLAIMER
ALL CONTENTS OF THIS MANUAL ARE PROVIDED “AS IS”. EXCEPT AS REQUIRED
BY APPLICABLE LAWS, NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR
IMPLIED, INCLUDINGBUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE MADE IN
RELATION TO THE ACCURACY, RELIABILITY OR CONTENTS OF THIS MANUAL.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL
SHANGHAI MOBILETEKCOMMUNICATION LTD BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, OR LOSS OF PROFITS,
BUSINESS, REVENUE, DATA, GOODWILL SAVINGS OR ANTICIPATED SAVINGS
REGARDLESS OF WHETHER SUCH LOSSES ARE FORSEEABLE OR NOT.

FCC Caution:
(1)Exposure to Radio Frequency Radiation. This equipment
must be installed and operated in accordance with provided
instructions and the antenna(s) used for this transmitter must be
installed to provide a separation distance of at least 20 cm from
all persons and must not be collocated or operating in
conjunction with any other antenna or transmitter. End-users
and installers must be provided with antenna installation
instructions and transmitter operating conditions for satisfying
RF exposure compliance.
(2) Any changes or modifications not expressly approved by the
grantee of this device could void the user's authority to operate
the equipment.
(3) This Transmitter must not be co-located or operating in
conjunction with any other antenna or transmitter.
(4) Labelling requirements:This device complies with part 15
of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received,
including interference that may cause undesired operation.
(5) if the host is marketed so that end users do not have straight
forward commonly used methods for access to remove the
module so that the FCC ID of the module is visible; then an
additional permanent label referring to the enclosed module:
Contains Transmitter Module FCC ID: 2AK9D-L710or
Contains FCC ID: 2AK9D-L710 must be used.
This Modular Approval is limited to OEM installation for mobile
and fixed applications only. The antenna installation and
operating configurations of this Modular, including any
applicable source-based timeaveraging duty factor, antenna gain
and cable loss must satisfy MPE categorical Exclusion
Requirements of 2.1091.

L710 EVB User Manual
Copyright© Shanghai Mobiletek Communication Ltd 2
Version History
Date
Version
Description of change
Author
2019-08-8
V1.0
Initial
Contents
1 ABOUT THIS DOCUMENT....................................................................................4
1.1 Scope of applications......................................................................................................................... 4

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1.2 Writing purpose................................................................................................................................. 5
1.3 Support and reference documentation list...................................................................................... 5
1.4 Abbreviations......................................................................................................................................6
2 ABSTRACT...............................................................................................................7
3 POWER SUPPLY.................................................................................................... 8
4 KEY DESCRIPTION................................................................................................9
4.1 Power on/off and RESET key........................................................................................................... 9
4.2 FORCED USB download key......................................................................................................... 10
4.3 WATCHDOG key.............................................................................................................................10
5 APPLICATION INTERFACE................................................................................11
5.1 UART DB9 Interface....................................................................................................................... 11
5.2 USB（AT UART）Interface...........................................................................................................12
5.3 USB（DEBUG UART）Interface..................................................................................................12
5.4 USB 2.0 Interface............................................................................................................................. 13
5.5 SIMCard Interface.......................................................................................................................... 13
5.6 Headset Interface............................................................................................................................. 14
5.7 Antenna interface.............................................................................................................................14
5.8 Audio interface（TBD）.................................................................................................................15
5.9 LED indicating lamp....................................................................................................................... 16
5.10 The others....................................................................................................................................... 18
6 ACCESSORIES AND ASSEMBLY.................................................................... 20
6.1 EVB Assembly.................................................................................................................................. 20
6.2 EVB Accessory................................................................................................................................. 21
6.3 Driver install.....................................................................................................................................22

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6.4 Dial configuration............................................................................................................................ 26
1 About this document
1.1 Scope of applications
This document describes the basic specifications of the L710 IoT Module EVB (hereinafter referred to as

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the L710) series product electrical characteristics, design guidance and hardware interface development
guidance. Users should design according to this document requirement and guidance.
This document is only applicable to the application development of L710 series products.
1.2 Writing purpose
This document provides the design and development basis for the module product user.By readin
g this document, the user can have a whole understanding our products, technical parameters ha
ve a clear understanding of product, and on by reading the basis of this document user can hel
p user complete 4 G IoT wireless Internet access products or equipment application development.
This hardware development document not only provides the function of product features and technical
parameters, also provides product reliability test standard, business function and related implementation
process, the RF performance and circuit design to guide the user.All are giving users a more
comprehensive design reference.
This document describes the hardware interface of the L710 module EVB,can help user to quickly
understand L710 EVB interface specifications, electrical and mechanical details,with the help of this
document users can use L710 serial module to design and set-up various types wireless terminals.
Intended audience
This document applicable to：
Systems Design Engineer
Structural Engineer
Hardware Engineer
Software Engineer
Test Engineer
Introduction
This document contains 5 chapters, contents as below:
Chapter
Content
1 Abstract
Introduce L710EVB basic technical SPEC.
2 Power Supply
Introduce L710 EVB power for the module.
3 Key Description
Introduce L710 EVB system control key
4Application interface
Introduce L710 module and L710 EVB application interface
5Accessory and Assembly
Introduce L710 EVB Accessory and assembly(hardware and software)
1.3 Support and reference documentation list
In addition to the hardware development documentation, we also provide the development board

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operation instruction manual and software development instruction manual based on this product. Table
1-1 is support for the list.
Table 1- 1Support document list
No.
Document
1
《L710 AT Command User Guide》
2
《L710_Hardware_Design》
3
《L710_EVB_user manual》
4
《L710 Schematic checklist》
5
《L710 Layout checklist》
6
《L710_Reference Design.pdf》
7
《L710_xx_DECAL.sch》
8
《L710_xx_DECAL.PCB》
1.4 Abbreviations
Table 1-2 is the relevant abbreviation and English interpretation of the whole document.
Table 1- 2 Abbreviation
Abbreviation
FullnameinEnglish
ESD
Electro-Static discharge
USB
Universal Serial Bus
UART
Universal Asynchronous Receiver Transmitter
SDCC
Secure Digital Card Controller
USIM
UniversalSubscriber Identification Module
SPI
Serial Peripheral Interface
I2C
Inter-Integrated Circuit
PCM
Pulse-coded Modulation
I/O
Input/output

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LED
Light Emitting Diode
GPIO
General-purpose Input/Output
GSM
Global Standard for Mobile Communications
GPRS
General Packet Radio Service
CDMA
Code Division Multiple Access
WCDMA
Wideband Code Division Multi Access
UMTS
Universal Mobile Telecommunication System
HSDPA
High Speed Downlink Packet Access
HSUPA
High Speed Uplink Packet Access
AGPS
Assisted Global Positioning System
BER
Bit Error Rate
DL
Downlink
COEX
WLAM/LTE-ISM coexistence
SMPS
Switched-mode power supplies
LTE
Long Term Evolution
FDD
Frequency Division Duplexing
TDD
Time Division Duplexing
IoT
Internet of things
2 Abstract
L710 Evaluation Board (silkscreen L506_EVB ) Is specially designed for developing L710 serial module，
To help developers to develop, debug, test L710 series 4 GIoT LTE module. Below and mark shows L710
the main functions of the development board. In this article, we will in the subsequent chapters on the
function of each part is described.

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Figure 2-1: L710 EVB global graph
The above picture description:
1. The L710 USB port is on the EPI board, not on the EVB.
2. The power switch S2. This switch S2 can switch the corresponding power input way, Choose an
external power adapter or direct bonding wire by external input 3.8 V dc power supply.
3. DB9 UART is serial port for module AT instruction, same as USB uart.
4. USB for Debug UART is used for user to retrieve the Debug information.
5. To facilitate the user's use, maintain a minimum system and we provide a power interface on the L710
EPI board.
3 Power Supply
L710 development board provides two methods for power supply: External DC 5 V adapter and 3.8 V DC
power supply directly. Through an external DC 5 V adapter power supply, the power supply voltage
regulator on the development board piece of power supply will be converted to about 3.8 V,power supply
for the module. These two modes can be switched by S1. Switch S1 to the top when using DC 5V
adapter and Switch S1 to the bottom when using battery power. The power indicator (LED1 next
to the power switch) will light up when the system is powered on. As shown in the figure below:

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Figure 3-1: L710 development board power in Status (orange Power LED Light up)
4 Key Description
L710 development board with a total of 5 top pressure switch and 14 dial switch. 5 top pressure for short
press trigger control, 14 dial switch (single pole double throw) for the long time state toggle switch. The
corresponding function on the L710 development board has a corresponding printing information, the
function of the specific instructions are as follows:
4.1 Power on/off and RESET key
When power supply for the EVB, the power indicator will light up. The lower left corner of the
PWRKEY button on the board, long press 500 MS, can open the module, and press the PWRKEY button

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for more time, then reset the module.
Figure 4-1：Power on/off reset key
4.2 FORCED USB download key
The L710 enables modules to enter forced download mode by pressing the FORCED USB BOOT
button, at which point the FORCED USB BOOT will be pulled up to 1.8v. Before the system is
powered on, press the FORCED USB BOOT key and the PWRKEY key at the same time to
enable the L710 module to enter the forced download mode.
Figure 4-2：forced usb download key
4.3 WATCHDOG key
Press the WDOG key and the PWRKEY key at the same time will disable the watchdog function.
Normally on, the watchdog function is enabled, the system will feed the dog regularly. The
watchdog button is mainly used for software debug.

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Figure 4-3：WDOG key
5 Application interface
5.1 UART DB9 Interface
There is a DB9 COM port on the L710 development board, and its signal pin is consistent with the
signal on the L710 module. The serial interface as the main serial port can support complete 9 -
line RS232. The COMS 1.8v level on the L710 module is converted to the standard RS232 level
via serial port level conversion chip SP3238. Users can connect to PC or other terminal devices
through DB9 serial port cable provided for serial port communication. Main serial port (this
function has not been opened yet) supports hardware flow control for AT instruction, data
transmission, etc. When using, you need to dial the switch S4 to the right as shown in the arrow
direction below.

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Figure5-1: L710 RS232 (DB9) Port
Note: .About the serial port baud rate associated Settings, please refer to L710 software
user manual.
5.2 USB（AT UART）Interface
In addition to the DB9 serial port described in 5.1 for AT communication, L506_EVB_V3 also
provides a set of USB virtual serial ports with exactly the same functions as DB9 serial ports for
AT instruction and data transmission. In use, also need to wave switch S4 to the right. DB9 serial
port function is turned off after USB cable is plugged in. AT instruction and other functions can
only be completed through this serial port.
Figure5-2: USB（AT UART）Port
5.3 USB（DEBUG UART）Interface
When software is debugging and analyzing problems, LOG can be captured by USB virtual
DEBUG serial port. In use, you need to dial the switch S4 to the left. After the serial port is
inserted into USB, DB9 serial port is closed. Sending AT can only use the USB virtual serial port
mentioned in 5.2.

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Figure5-3: USB（DEBUG UART）Port
5.4 USB 2.0 Interface
The L710 module supports USB 2.0 with a maximum USB transfer rate of 480Mbps.Software
version download can be download through this USB serial port.
Figure5-4: USB 2.0 Port
5.5 SIMCard Interface
L710 support one single voltage (1.8V) SIM interface, but for the convenience of users, we have provided
two SIM holder interface. it’s standard SIM card slot and Micro SIM card slot. Each SIM slot automatic
identification (correspond change the SIM support voltage) show as below figure:

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Figure5-5: Standard SIM and Micro SIM
Note ： Because L710 only support one SIM card port, so can’t assemble two SIM card
at the same time in your applications.
5.6 Headset Interface
If the audio codec chip MAX9867ETJ+ is used in L506_EVB_V3, the MIC input and sound
output are through headphone channels. Earphones need to use Chinese standard earphones.
Figure5-6: Chinese standard earphone
5.7 Antenna interface
The L710 antenna interface is located on the module load board mounted on the EVB board and
provides two antenna interfaces, one of which is the main antenna port, directly connected to the antenna
for wireless function, and the other is the GPS antenna interface. Main antenna interface adopts SMA
head, connected to the supporting external antenna by cable; GPS antenna USES IPX interface. As
shown in the figure below:

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Figure5-7: Function module load plate and antenna interface
Note: L710 has only one main antenna interface, and the user can only use ANT_MAIN as
the antenna interface when it is actually used.
5.8 Audio interface（TBD）
The L710 module supports 1-channel PCM channel, which can also be reused as I2S signal. When
using, switch S2 and S3 are needed to cooperate. The switch S2 is a software and hardware switch.
When switching S2 to the top, the software can pull GPIO25 high level to make the power supply
and crystal vibration of CODEC; When switching S2 to the bottom, the hardware automatically
enables the power and crystal oscillator of CODEC. The switch S3 is the selection switch of
CODEC. When switching S3 to the top, CODEC uses MAX9867ETJ+ chip. When using the
MAX9867ETJ+ chip, the sound comes from the earphone, the Chinese standard earphone needs to
be plugged in. Switch S3 to the bottom, the CODEC chip is NUA8814. At this time, the sound
comes from the SPK end, and 8 ohm horn can be welded to the SPK end. Toggle switch as shown
in the figure below:
Figure5-8: CODEC SWITCH S2 S3
The default audio solution on EVB development board is NAU8814, so the external audio channel

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is also developed based on NAU8814. The general block diagram is as follows:
Note: Audio system is a very complicate system, it contains many factors, such as the
sound chamber structure. Because in our EVB there is no sound chamber, so it only make
sure the function is OK or not.
5.9 LED indicating lamp
The development board has 13 functional indicators to indicate the status of different functional
units. The definitions of each lamp are shown in table 1:
number
name
describe
LED1
System supply
indicator
LED on indicate that the system is powered on
LED2
CODEC enable
Switch S2 to the top, and software pull GPIO25
up, the LED on
LED3
NETLIGHT
Network indicator
LED4
I2C_SDA
I2C/GPIO Multiplexing channel
LED5
SPI_MISO_BLSP2
SPI/GPIO Multiplexing channel
LED6
I2C_SCL
I2C/GPIO Multiplexing channel
LED7
WAKEUP_IN
Wake up the interrupt

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LED8
STATUS
System status indicator
LED9
ISINK
ISINK
LED11
MB_GPIO_0
GPIO Enable Pin
LED12
SPI_CLK
SPI/GPIO Multiplexing channel
LED13
SPI_MOSI
SPI/GPIO Multiplexing channel
LED14
SPI_CS
SPI/GPIO Multiplexing channel
Table 5-1: LED

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Figure5-9: Status indicator
Note: For configuration and inquiry of each indicator light and toggle switch, please
refer to the L710 software manual document
5.10 The others
Development board reserved 1 groups of external connection pin interface, used for debugging the
peripheral devices and production test purpose. The corresponding interface definition and physical
objects as shown in the figure below:
Figure5-10：For Test Module Main Interface
In addition, for the convenience of users, we also can all use the module to the interface of the derivation,
using 2.54 mm spacing standard dupont line can be connected. Interface is located in the development
board above the upper right corner, specific interface function as shown in the figure