Telit CHARLIE EVK User Manual

Mod. 0805 2017-01 Rev.6

CHARLIE EVK

HW User Guide

1VV0301670 Rev. 5 – 2021-02-02

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 2 of 38 2021-02-02

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE

NOTICE

While reasonable efforts have been made to assure the accuracy of this document, Telit
assumes no liability resulting from any inaccuracies or omissions in this document, or from
use of the information obtained herein. The information in this document has been carefully
checked and is believed to be reliable. However, no responsibility is assumed for
inaccuracies or omissions. Telit reserves the right to make changes to any products
described herein and reserves the right to revise this document and to make changes from
time to time in content hereof with no obligation to notify any person of revisions or changes.
Telit does not assume any liability arising out of the application or use of any product,
software, or circuit described herein; neither does it convey license under its patent rights
or the rights of others.

It is possible that this publication may contain references to, or information about Telit
products (machines and programs), programming, or services that are not announced in
your country. Such references or information must not be construed to mean that Telit
intends to announce such Telit products, programming, or services in your country.

COPYRIGHTS

This instruction manual and the Telit products described in this instruction manual may be,
include or describe copyrighted Telit material, such as computer programs stored in
semiconductor memories or other media. Laws in the Italy and other countries preserve for
Telit and its licensors certain exclusive rights for copyrighted material, including the
exclusive right to copy, reproduce in any form, distribute and make derivative works of the
copyrighted material. Accordingly, any copyrighted material of Telit and its licensors
contained herein or in the Telit products described in this instruction manual may not be
copied, reproduced, distributed, merged or modified in any manner without the express
written permission of Telit. Furthermore, the purchase of Telit products shall not be deemed
to grant either directly or by implication, estoppel, or otherwise, any license under the
copyrights, patents or patent applications of Telit, as arises by operation of law in the sale
of a product.

COMPUTER SOFTWARE COPYRIGHTS

The Telit and 3rd Party supplied Software (SW) products described in this instruction
manual may include copyrighted Telit and other 3rd Party supplied computer programs
stored in semiconductor memories or other media. Laws in the Italy and other countries
preserve for Telit and other 3rd Party supplied SW certain exclusive rights for copyrighted
computer programs, including the exclusive right to copy or reproduce in any form the
copyrighted computer program. Accordingly, any copyrighted Telit or other 3rd Party
supplied SW computer programs contained in the Telit products described in this instruction
manual may not be copied (reverse engineered) or reproduced in any manner without the
express written permission of Telit or the 3rd Party SW supplier. Furthermore, the purchase
of Telit products shall not be deemed to grant either directly or by implication, estoppel, or
otherwise, any license under the copyrights, patents or patent applications of Telit or other
3rd Party supplied SW, except for the normal non-exclusive, royalty free license to use that
arises by operation of law in the sale of a product.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 3 of 38 2021-02-02

USAGE AND DISCLOSURE RESTRICTIONS

I. License Agreements

The software described in this document is the property of Telit and its licensors. It is
furnished by express license agreement only and may be used only in accordance with the
terms of such an agreement.

II. Copyrighted Materials

Software and documentation are copyrighted materials. Making unauthorized copies is
prohibited by law. No part of the software or documentation may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, without prior written permission of Telit

III. High Risk Materials

Components, units, or third-party products used in the product described herein are NOT
fault-tolerant and are NOT designed, manufactured, or intended for use as on-line control
equipment in the following hazardous environments requiring fail-safe controls: the
operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air
Traffic Control, Life Support, or Weapons Systems (High Risk Activities"). Telit and its
supplier(s) specifically disclaim any expressed or implied warranty of fitness for such High
Risk Activities.

IV. Trademarks

TELIT and the Stylized T Logo are registered in Trademark Office. All other product or
service names are the property of their respective owners.

V. Third Party Rights

The software may include Third Party Right software. In this case you agree to comply with
all terms and conditions imposed on you in respect of such separate software. In addition
to Third Party Terms, the disclaimer of warranty and limitation of liability provisions in this
License shall apply to the Third Party Right software.

TELIT HEREBY DISCLAIMS ANY AND ALL WARRANTIES EXPRESS OR IMPLIED
FROM ANY THIRD PARTIES REGARDING ANY SEPARATE FILES, ANY THIRD PARTY
MATERIALS INCLUDED IN THE SOFTWARE, ANY THIRD PARTY MATERIALS FROM

WHICH THE SOFTWARE IS DERIVED (COLLECTIVELY “OTHER CODE”), AND THE

USE OF ANY OR ALL THE OTHER CODE IN CONNECTION WITH THE SOFTWARE,
INCLUDING (WITHOUT LIMITATION) ANY WARRANTIES OF SATISFACTORY
QUALITY OR FITNESS FOR A PARTICULAR PURPOSE.

NO THIRD PARTY LICENSORS OF OTHER CODE SHALL HAVE ANY LIABILITY FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED
AND WHETHER MADE UNDER CONTRACT, TORT OR OTHER LEGAL THEORY,
ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE OTHER CODE
OR THE EXERCISE OF ANY RIGHTS GRANTED UNDER EITHER OR BOTH THIS
LICENSE AND THE LEGAL TERMS APPLICABLE TO ANY SEPARATE FILES, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 4 of 38 2021-02-02

APPLICABILITY TABLE

PRODUCTS

CHARLIE EVALUATION KIT

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 5 of 38 2021-02-02

Contents

NOTICE 2

COPYRIGHTS .................................................................................................. 2

COMPUTER SOFTWARE COPYRIGHTS ....................................................... 2

USAGE AND DISCLOSURE RESTRICTIONS ................................................ 3

I. License Agreements ....................................................................... 3

II. Copyrighted Materials .................................................................... 3

III. High Risk Materials ........................................................................ 3

IV. Trademarks .................................................................................... 3

V. Third Party Rights ........................................................................... 3

APPLICABILITY TABLE .................................................................................. 4

CONTENTS ...................................................................................................... 5

1. INTRODUCTION ............................................................................ 7

1.1. Scope ............................................................................................. 7

1.2. Audience ........................................................................................ 7

1.3. Contact Information, Support ......................................................... 7

1.4. Text Conventions ........................................................................... 9

1.5. Related Documents ...................................................................... 10

2. OVERVIEW .................................................................................. 11

NOTICE 13

3. CONNECTORS ............................................................................ 14

3.1. Arduino MKR format Pin-out ........................................................ 14

3.2. MCU Native USB Connector ........................................................ 16

3.3. ME310 Native USB Connector ..................................................... 17

3.4. MCU DEBUG connector ............................................................... 18

3.5. SIM Connectors ............................................................................ 19

3.6. ANTENNA Connectors ................................................................. 20

4. CIRCUIT BLOCKS ....................................................................... 21

4.1. MCU to ME310 serial connection ................................................. 21

4.2. BMA400 Accelerometer ............................................................... 22

4.3. MCU Buttons and LEDs ............................................................... 23

4.4. ME310 SLED ................................................................................ 24

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 6 of 38 2021-02-02

4.5. MCU Reset Button ....................................................................... 25

4.6. Battery Charger ............................................................................ 26

4.7. 3V3 Power Supply ........................................................................ 29

4.8. 1V8 Power Supply ........................................................................ 30

4.9. 3V8 Power Supply ........................................................................ 31

4.10. ME310 ON/OFF Switch ................................................................ 32

4.11. MCU RTC Clock ........................................................................... 32

5. MECHANICAL DESIGN............................................................... 33

5.1. Drawing ........................................................................................ 33

6. SAFETY RECOMMENDATIONS ................................................. 34

6.1. READ CAREFULLY ..................................................................... 34

7. ACRONYMS ................................................................................ 35

8. DOCUMENT HISTORY ................................................................ 37

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 7 of 38 2021-02-02

1. INTRODUCTION

1.1. Scope

Scope of this document is to describe the hardware components of the CHARLIE EVK
board based on Telit ME310G1-WW module and ATSAMD21G18 MCU from Microchip.

1.2. Audience

This document is intended for Telit customers, who are integrators, about to implement their
applications using our CHARLIE EVK board.

Design of the Charlie Evaluation Kit is heavily optimized for small size,
it is not a reference design for generic use.

Before copying it “as is”, please contact Telit Application Engineering

for a design review and suggestions to optimize it according to your
design constraints.

1.3. 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]

Alternatively, use:

http://www.telit.com/support

For detailed information about where you can buy the Telit modules or for recommendations
on accessories and components visit:

http://www.telit.com

Our aim is to make this guide as helpful as possible. Keep us informed of your comments
and suggestions for improvements.

Telit appreciates feedback from the users of our information.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 8 of 38 2021-02-02

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 9 of 38 2021-02-02

1.4. Text Conventions

Danger – This information MUST be followed or catastrophic
equipment failure or bodily injury may occur.

Caution or Warning – Alerts the user to important points about
integrating the module, if these points are not followed, the module and
end user equipment may fail or malfunction.

Tip or Information – Provides advice and suggestions that may be
useful when integrating the module.

All dates are in ISO 8601 format, i.e. YYYY-MM-DD.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 10 of 38 2021-02-02

1.5. Related Documents

• ME310G1 HW User Guide, 1VV0301351

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 11 of 38 2021-02-02

2. OVERVIEW

The aim of this document is to describe the “CHARLIE” EVK board based on Telit

ME310G1-WW modem module and ATSAMD21G18 MCU from Microchip.
The CHARLIE board is an Arduino MKR form factor evaluation board that can be

programmed with Arduino IDE or with native tools for ATSAMD21 from Microchip.
The CHARLIE EVK board is powered either by

• onboard USB connectors

• VIN pin on connector

Using either the onboard 3.8V DC power supply or by a 3.7 V LIPO battery.
All GPIO pins of Telit ME310G1-WW levels are set to 1.8 V, while all GPIO from

ATSAMD21 MCU are set at 3.3 V.

This document lists and describes circuit building blocks and connectors

Figure 1 - CHARLIE EVK Board

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 12 of 38 2021-02-02

Figure 2 - CHARLIE Block Diagram

The CHARLIE EVK has 2 USB connectors:

• The first USB connector is located at opposite site of ME310 module and SMA
connector is connected to the ATSAMD21 microcontroller

• The second USB connector is located near to the ME310 module and SMA
connector is connected to the ME310 module

ATSAMD21 MCU communicates with Telit ME310 module using an asynchronous serial
connection.

The ATSAMD21 MCU is connected to the onboard BMA400 accelerometer from Bosch
Sensortec.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 13 of 38 2021-02-02

NOTICE

While reasonable efforts have been made to assure the accuracy of this document, Telit
assumes no liability resulting from any inaccuracies or omissions in this document, or from
use of the information obtained herein. The information presented in this document is
believed to be accurate and reliable. However, no responsibility is assumed by Telit
Communications S.p.A. for its use, nor any infringement of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise
under any patent rights of Telit Communications S.p.A. other than for circuitry embodied in
Telit products. This document is subject to change without notice.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 14 of 38 2021-02-02

3. CONNECTORS

3.1. Arduino MKR format Pin-out

Figure 3 - Arduino MKR Pinout

Pin

Signal

I/O

Function

Type

MCU I/O

POWER SUPPLY

J4,14

+5V

O

5.0 V I/O Level

J4,13

VIN

I

External Power Input

J4,12

+3V3

O

3.3 V I/O Level

J4,11

GND -

GPIO INTERFACE @ 3V3

J4,10

RESET

I

MCU Reset

J4,9

D14

I/O

GPIO/USART TX

PB22

J4,8

D13

I/O

GPIO/USART RX

PB23

J4,7

D12

I/O

GPIO/I2C SCL

PA09

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 15 of 38 2021-02-02

J4,6

D11

I/O

GPIO/I2C SDA

PA08

J4,5

D10

I/O

GPIO/SPI MISO

PA19

J4,4

D9

I/O

GPIO/SPI SCK

PA17

J4,3

D8

I/O

GPIO/SPI MOSI

PA16

J4,2

D7

I/O

GPIO/PWM

PA21

J4,1

D6

I/O

GPIO/PWM

PA20

J3,14

D5

I/O

GPIO/PWM

PB11

J3,13

D4

I/O

GPIO/PWM

PB10

J3,12

D3

I/O

GPIO/PWM

PA11

J3,11

D2

I/O

GPIO/PWM

PA10

J3,10

D1

I/O

GPIO

PA23

J3,9

D0

I/O

GPIO

PA22

J3,8

D21/A6

I/O

GPIO/AIN[7]

PA07

J3,7

D20/A5

I/O

GPIO/AIN[6]

PA06

J3,6

D19/A4

I/O

GPIO/AIN[5]

PA05

J3,5

D18/A3

I/O

GPIO/AIN[4]

PB04

J3,4

D17/A2

I/O

GPIO/AIN[11]

PB03

J3,3

D16/A1

I/O

GPIO/AIN[10]

PB02

J3,2

D15/A0

I/O

GPIO/AIN[0]

PA02

J3,1

AREF

I

AREF/AIN[1]

PA03

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 16 of 38 2021-02-02

3.2. MCU Native USB Connector

Figure 4 – ATSAMD21 Native USB

Pin

Signal

I/O

Function

Type

Comment

POWER SUPPLY
J1,1

5V

I

J1,5

GND

-

USB HS 2.0 COMMUNICATION PORT (FW upgrade and Data)
J1,2

USB_DM

I/O

USB differential Data (-)

PA24

J1,3

USB_DP

I/O

USB differential Data (+)

PA25

J1,4

USB OTG ID

N.C.

The J1 USB plug is connected to the ATSAMD21 MCU native USB port. The board is
protected by resettable fuse and ESD discharge.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 17 of 38 2021-02-02

3.3. ME310 Native USB Connector

Figure 5 – ME310 Native USB

Pin

Signal

I/O

Function

Type

ME310

POWER SUPPLY
J7,1

5V I USB_VBUS

T18

J7,5

GND

-

USB HS 2.0 COMMUNICATION PORT (FW upgrade and Data)
J7,2

USB_DM

I/O

USB differential Data (-)

V18

J7,3

USB_DP

I/O

USB differential Data (+)

U19

J7,4

USB OTG ID

N.C.

The J7 USB plug is connected to the ME310 native USB port. The board is protected by
resettable fuse and ESD discharge.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 18 of 38 2021-02-02

3.4. MCU DEBUG connector

Figure 6 - DEBUG connector

Pin

Signal

I/O

Function

Type

Comment

POWER SUPPLY

J2,1

3V3

I

J2,3

GND

-

J2,5

GND

-

J2,9

GND

-

DEBUG Interface

J2,2

SWDIO

I/O

DEBUG DATA

PA31

J2,4

SWCLK I DEBUG CLOCK

PA30

J2,10

RESETN I RESET

RESETN

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 19 of 38 2021-02-02

3.5. SIM Connectors

Figure 7 - SIM Sockets

The board supports a micro SIM socket and includes pads to solder an eSIM: both inputs
are ESD protected.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 20 of 38 2021-02-02

3.6. ANTENNA Connectors

Figure 8 – Antennas

The 4G Cellular antenna signal is connected to the J8 SMA connector.

The GNSS Signal can be connected either to the uFL connector J9 or
the GPS Patch Antenna, which is enabled by default.

In order to disable the Patch Antenna and connect an external GPS
antenna to J9, remove R48 and R21 resistors and solder a 0-ohm
resistor on R20 pads and a 100 pF capacitor on C89 pads.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 21 of 38 2021-02-02

4. CIRCUIT BLOCKS

4.1. MCU to ME310 serial connection

Figure 9 –MCU to ME310 Serial Connection

The ATSAMD21 MCU GPIO works at 3.3 V while the ME310 GPIO levels are 1.8 V. To
connect the two devices using a serial connection with hardware handshake, level shifters
are used.

MCU Pin

MCU Direction

Function

ME310 Direction

ME310 Pin

PA15 I CTS

O

AA17

PA13 I RXD

O

AA15

PA14 O RTS

I

Y18

PA12 O TXD

I

Y16

PA28 I RI

O

D13

PA27 O DTR

I

D11

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 22 of 38 2021-02-02

4.2. BMA400 Accelerometer

Figure 10 – BMA400 Accelerometer

The CHARLIE board mounts a Bosch Sensortech BMA400 ultra low power acceleration
sensor, connected to the ATSAMD21 MCU through I2C communication.

Pin

Direction

Function

PA09

O

I2C Clock

PA08

I/O

I2C Data

PB09 I INT1 from BMA400

PA18 I INT2 from BMA400

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 23 of 38 2021-02-02

4.3. MCU Buttons and LEDs

Figure 11 – ATSAMD21 Pushbuttons and Leds

The CHARLIE board has a user-available LED, LD1 and a button, PB2 connected to
ATSAMD21 MCU. The led is ON when the MCU pin is high, while the button is active
LOW.

Pin

Direction

Function

PA20

I

User Button

PA21

O

User RED LED

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 24 of 38 2021-02-02

4.4. ME310 SLED

Figure 12 – ME310 SLed

The CHARLIE board has a LED, LD2 connected to ME310 S_LED pin. The led is ON
when the MCU pin is high.

Pin

Direction

Function

B2

O

Amber LD2/S_LED

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 25 of 38 2021-02-02

4.5. MCU Reset Button

Figure 13 – RESET button

The CHARLIE board has one RESET button PB1 connected to ATSAMD21 MCU.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 26 of 38 2021-02-02

4.6. Battery Charger

Figure 14 - Battery Charger

A +3.7 V Lipo battery (not included) connected to J10 can power the CHARLIE board.
The battery can be charged by the onboard charger, which receives receives +5V from

the VIN connector, MCU USB Native Connector or ME310 Native USB connector.
When an external power source is present and the battery is connected, the battery is

charged. The Board voltage is supplied by the external power source.
When the external power source is disconnected, the CHARLIE board is battery powered
The battery charger notifies its status through the 3 LEDs:

Pin

Direction

LED

Function

PG

O

LD3 green

Power Good

STAT1

O

LD4A yellow

Charging

STAT2

O

LD4B green

Charge Complete

Powering the board through the native USB port is not recommended
on long term, since it relies on the host device capability to supply the
required current. Telit suggests using an external 5V DC power supply
through VIN power connector or using an external battery pack

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 27 of 38 2021-02-02

Battery connector J17 is S3B-PH-SM4-TB.

Figure 15 - Battery Connector

PIN

Function

Comment

Battery

1

+

2

Temperature sensor

3

-

Figure 16 Connector without temperature sensor (top) and with temperature sensor
(bottom)

By default, the Charlie board is configured for batteries without NTC temperature sensor.
To disable battery temperature monitoring, the 10 Kohm resistor R31 is mounted.
If a battery with NTC temperature sensor is connected to the board WITHOUT removing

R31 resistor, the battery charger will not function.
In order to charge a battery equipped with NTC (3 wire connections), R31 must be

removed.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 28 of 38 2021-02-02

WARNING

Use Li-Ion battery V

nom

= 3.7V, V

chrg

= 4.2V Capacity >= 700 mAh

Li-Po batteries are charged at 4.2V with a current that is usually half the nominal capacity
(C/2). This board has a dedicated IC that has a preset charging current of 350mAh: this
means that the MINIMUM capacity of the Li-Po battery shall be 700 mAh.

It is strongly recommended that a Li-Po battery of at least 700mAh
capacity is selected. Smaller cells will be damaged by this current
and may overheat, release gasses, catch fire and explode.

A larger cell will take more time to charge but won't overheat or cause any harm.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 29 of 38 2021-02-02

4.7. 3V3 Power Supply

Figure 17 - 3V3 Power Supply

The CHARLIE board provides a +3.3 V power source to power:

• ATSAMD21 MCU and LEDs

• BMA400 Accelerometer

• Level Shifters

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 30 of 38 2021-02-02

4.8. 1V8 Power Supply

Figure 18 – ME310 internal power supply

The ME310 module is powered at 3.8 V, but all I/O pins operate at 1.8 V: the LDO
provides 1.8 V level to:

• level translators

• SKY65723-81 Low-Noise Amplifier Front-End Module.

PWRMON pin on ME310 module enables the 1.8 V LDO output.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 31 of 38 2021-02-02

4.9. 3V8 Power Supply

Figure 19 – ME310 3.8 V power supply

The ME310 module is powered at 3.8V, the Buck converter provides 3.8V power supply
for:

• ME310 Module

• NCP612S LDO regulator for uFL GPS antenna

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 32 of 38 2021-02-02

4.10. ME310 ON/OFF Switch

Figure 20 - ON/OFF Switch Circuit

The ON_OFF pin can be controlled by the PB3 bush-button or by the 310_ON_OFF signal
that is connected to PB08 output pin of ATSAMD21 MCU.

4.11. MCU RTC Clock

Figure 21 - RTC Clock Circuit

A 32.768 kHz quartz oscillator is connected to PA00 and PA01 of ATSAMD21 MCU to
provide an accurate time base for the internal RTC.

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 33 of 38 2021-02-02

5. MECHANICAL DESIGN

5.1. Drawing

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 34 of 38 2021-02-02

6. SAFETY RECOMMENDATIONS

6.1. READ CAREFULLY

Be sure the use of this product is allowed in the country and in the environment required.
The use of this product may be dangerous and has to be avoided in the following areas:

• Where it can interfere with other electronic devices in environments such as

hospitals, airports, aircrafts, etc.

• Where there is risk of explosion such as gasoline stations, oil refineries, etc. It is the

responsibility of the user to enforce the country regulation and the specific
environment regulation.

Do not disassemble the product; any mark of tampering will compromise the warranty
validity. We recommend following the instructions of the hardware user guides for correct
wiring of the product. The product has to be supplied with a stabilized voltage source and
the wiring has to be conformed to the security and fire prevention regulations. The product
has to be handled with care, avoiding any contact with the pins because electrostatic
discharges may damage the product itself. Same cautions have to be taken for the SIM,
checking carefully the instruction for its use. Do not insert or remove the SIM when the
product is in power saving mode.

The system integrator is responsible for the functioning of the final product; therefore, care
has to be taken to the external components of the module, as well as any project or
installation issue, because the risk of disturbing the GSM network or external devices or
having impact on the security. Should there be any doubt, please refer to the technical
documentation and the regulations in force. Every module has to be equipped with a proper
antenna with specific characteristics. The antenna has to be installed with care in order to
avoid any interference with other electronic devices and has to guarantee a minimum
distance from the body (20 cm). In case this requirement cannot be satisfied, the system
integrator has to assess the final product against the SAR regulation.

The European Community provides some Directives for the electronic equipment
introduced on the market. All of the relevant information is available on the European
Community website:

http://ec.europa.eu/enterprise/sectors/rtte/documents/

The text of the Directive 99/05 regarding telecommunication equipment is available,
while the applicable Directives (Low Voltage and EMC) are available at:

http://ec.europa.eu/enterprise/sectors/electrical/

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 35 of 38 2021-02-02

7. ACRONYMS

TTSC

Telit Technical Support Centre

USB

Universal Serial Bus

HS

High Speed

DTE

Data Terminal Equipment

UMTS

Universal Mobile Telecommunication System

WCDMA

Wideband Code Division Multiple Access

HSDPA

High Speed Downlink Packet Access

HSUPA

High Speed Uplink Packet Access

UART

Universal Asynchronous Receiver Transmitter

HSIC

High Speed Inter Chip

SIM

Subscriber Identification Module

SPI

Serial Peripheral Interface

ADC

Analog – Digital Converter

DAC

Digital – Analog Converter

I/O

Input Output

GPIO

General Purpose Input Output

CMOS

Complementary Metal – Oxide Semiconductor

MOSI

Master Output – Slave Input

MISO

Master Input – Slave Output

CLK

Clock

MRDY

Master Ready

SRDY

Slave Ready

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 36 of 38 2021-02-02

CS

Chip Select

RTC

Real Time Clock

PCB

Printed Circuit Board

ESR

Equivalent Series Resistance

VSWR

Voltage Standing Wave Radio

VNA

Vector Network Analyzer

CHARLIE HW User Guide

1VV0301670 Rev. 5 Page 37 of 38 2021-02-02

8. DOCUMENT HISTORY

Revision

Date

Changes

0

2020-07-20

Initial revision

1

2020-09-02

Battery information added

2

2020-10-29

ME310 variant updated to ME310G1-WW

3

2020-01-13

Schematics updated

4

2020-01-29

Schematics updated
Warning added

5

2020-02-02

MCU Buttons and Led table corrected

Mod. 0805 2017-01 Rev.6