How it Works
Telit
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UE910
User Manual
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Telit UE910 User Manual

UE910 Hardware User Guide
1VV0301012 Rev.14 – 2020-11-17
PRODUCT
UE910-EUR
UE910-EUD
UE910-NAR
UE910-NAD
UE910-GL
1VV0301012 Rev.14 – 2020-11-17
Applicability Table
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 2 of 88
1VV0301012 Rev.14 – 2020-11-17
DISCLAIMER
The information contained in this document is the proprietary information of Telit Communications S.p.A. and its affiliates (“TELIT”). The contents are confidential and any disclosure to persons other than the officers, employees, agents or subcontractors of the owner or licensee of this document, without the prior written consent of Telit, is strictly prohibited.
Telit makes every effort to ensure the quality of the information it makes available. Notwithstanding the foregoing, Telit does not make any warranty as to the information contained herein, and does not accept any liability for any injury, loss or damage of any kind incurred by use of or reliance upon the information.
Telit disclaims any and all responsibility for the application of the devices characterized in this document, and notes that the application of the device must comply with the safety standards of the applicable country, and where applicable, with the relevant wiring rules.
Telit reserves the right to make modifications, additions and deletions to this document due to typographical errors, inaccurate information, or improvements to programs and/or equipment at any time and without notice. Such changes will, nevertheless be incorporated into new editions of this application note.
All rights reserved.
© 2013 Telit Communications S.p.A.
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1VV0301012 Rev.14 – 2020-11-17
Contents
1 INTRODUCTION ........................................................................................................................................................... 6
1.1 SCOPE .......................................................................................................................................................................... 6
1.2 AUDIENCE ..................................................................................................................................................................... 6
1.3 CONTACT INFORMATION, SUPPORT ..................................................................................................................................... 6
1.4 DOCUMENT ORGANIZATION .............................................................................................................................................. 7
1.5 TEXT CONVENTIONS ......................................................................................................................................................... 8
1.6 RELATED DOCUMENTS ...................................................................................................................................................... 8
1.7 DOCUMENT HISTORY ....................................................................................................................................................... 9
2 OVERVIEW ................................................................................................................................................................. 10
3 UE910 MODULE CONNECTIONS ................................................................................................................................ 11
3.1 PIN-OUT ................................................................................................................................................................... 11
3.1.1 LGA Pads Layout ................................................................................................................................................ 17
4 HARDWARE COMMANDS .......................................................................................................................................... 18
4.1 TURNING ON THE UE910............................................................................................................................................... 18
4.2 TURNING OFF THE UE910 ............................................................................................................................................. 24
4.3 UE910 UNCONDITIONAL SHUTDOWN ............................................................................................................................... 26
5 POWER SUPPLY ......................................................................................................................................................... 29
5.1 POWER SUPPLY REQUIREMENTS ....................................................................................................................................... 29
5.2 POWER CONSUMPTION .................................................................................................................................................. 30
5.3 GENERAL DESIGN RULES ................................................................................................................................................. 31
5.3.1 Electrical Design Guidelines ............................................................................................................................... 31
5.3.2 Thermal Design Guidelines ................................................................................................................................ 35
5.3.3 Power Supply PCB layout Guidelines .................................................................................................................. 36
6 GSM/WCDMA RADIO SECTION ................................................................................................................................. 38
6.1 UE910 PRODUCT VARIANTS ............................................................................................................................................ 38
6.2 TX OUTPUT POWER ....................................................................................................................................................... 38
SENSITIVITY ....................................................................................................................................................................... 39
6.3 GSM/WCDMA ANTENNA REQUIREMENTS ........................................................................................................................ 40
6.4 GSM/WCDMA - PCB LINE GUIDELINES ........................................................................................................................... 42
6.5 PCB GUIDELINES IN CASE OF FCC CERTIFICATION .................................................................................................................. 43
6.5.1 Transmission line design .................................................................................................................................... 43
6.5.2 Transmission line measurements ....................................................................................................................... 44
6.6 ANTENNA - INSTALLATION GUIDELINES ............................................................................................................................... 46
7 LOGIC LEVEL SPECIFICATIONS .................................................................................................................................... 47
7.1 UNCONDITIONAL SHUTDOWN .......................................................................................................................................... 48
8 USB PORT .................................................................................................................................................................. 49
8.1 USB 2.0 HS ................................................................................................................................................................ 49
9 SPI PORT .................................................................................................................................................................... 50
9.1 SPI CONNECTIONS ......................................................................................................................................................... 50
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10 USB HSIC .................................................................................................................................................................... 51
11 SERIAL PORTS ............................................................................................................................................................ 52
11.1 MODEM SERIAL PORT 1 (USIF0) ............................................................................................................................... 53
11.2 MODEM SERIAL PORT 2 (USIF1) ............................................................................................................................... 55
11.3 RS232 LEVEL TRANSLATION ........................................................................................................................................... 56
12 AUDIO SECTION OVERVIEW ...................................................................................................................................... 58
12.1 ANALOG VOICE INTERFACE ............................................................................................................................................ 58
12.1.1 MIC connection ............................................................................................................................................... 59
12.1.2 LINE IN Connection .......................................................................................................................................... 61
12.1.3 EAR Connection ............................................................................................................................................... 62
12.1.4 Electrical Characteristics .................................................................................................................................. 63
12.2 DIGITAL VOICE INTERFACE ............................................................................................................................................. 65
12.2.1 Electrical Characteristics .................................................................................................................................. 65
12.2.2 CODEC Examples ............................................................................................................................................. 65
13 GENERAL PURPOSE I/O ............................................................................................................................................. 66
13.1 GPIO LOGIC LEVELS ..................................................................................................................................................... 67
13.2 USING A GPIO PAD AS INPUT ....................................................................................................................................... 68
13.3 USING A GPIO PAD AS OUTPUT ................................................................................................................................... 68
13.4 INDICATION OF NETWORK SERVICE AVAILABILITY ................................................................................................................. 69
13.5 RTC BYPASS OUT ........................................................................................................................................................ 70
13.6 EXTERNAL SIM HOLDER IMPLEMENTATION ....................................................................................................................... 70
13.7 VAUX POWER OUTPUT ................................................................................................................................................ 70
13.8 ADC CONVERTER ........................................................................................................................................................ 71
13.8.1 Description ...................................................................................................................................................... 71
13.8.2 Using ADC Converter ....................................................................................................................................... 71
14 MOUNTING THE UE910 ON THE APPLICATION .......................................................................................................... 72
14.1 GENERAL ................................................................................................................................................................... 72
14.2 MODULE FINISHING & DIMENSIONS ................................................................................................................................. 72
14.3 RECOMMENDED FOOT PRINT FOR THE APPLICATION ............................................................................................................. 74
14.4 STENCIL..................................................................................................................................................................... 75
14.5 PCB PAD DESIGN ......................................................................................................................................................... 75
14.6 PCB PAD DIMENSIONS .................................................................................................................................................. 76
14.7 SOLDER PASTE ............................................................................................................................................................ 78
14.7.1 UE910 Solder reflow ........................................................................................................................................ 78
14.8 PACKING SYSTEM (TRAY) ............................................................................................................................................... 80
14.9 PACKING SYSTEM (REEL) ............................................................................................................................................... 82
14.9.1 Carrier Tape Detail .......................................................................................................................................... 82
14.9.2 Reel Detail ....................................................................................................................................................... 83
14.9.3 Packaging Detail ............................................................................................................................................. 84
14.10 MOISTURE SENSITIVITY ............................................................................................................................................... 84
15 SAFETY RECOMMANDATIONS ................................................................................................................................... 85
16 CONFORMITY ASSESSMENT ISSUES........................................................................................................................... 86
16.1 FCC/IC REGULATORY NOTICES ....................................................................................................................................... 86
16.2 ANATEL REGULATORY NOTICES ..................................................................................................................................... 88
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1 Introduction

1.1 Scope

The aim of this document is the description of some hardware solutions useful for developing a product with the Telit UE910 module.

1.2 Audience

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This document is intended for Telit customers, who are integrators, about to implement their applications using our UE910 modules.

1.3 Contact Information, Support

For general contact, technical support, to report documentation errors and to order manuals, contact Telit’s Technical Support Center (TTSC) at:
TS-EMEA@telit.com TS-NORTHAMERICA@telit.com TS-LATINAMERICA@telit.com TS-APAC@telit.com
Alternatively, use:
http://www.telit.com/en/products/technical-support-center/contact.php
For detailed information about where you can buy the Telit modules or for recommendations on accessories and components visit:
http://www.telit.com
To register for product news and announcements or for product questions contact Telit’s Technical Support Center (TTSC). 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.
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1.4 Document Organization

This document contains the following chapters:
Chapter 1: “Introduction” provides a scope for this document, target audience, contact and support information, and text conventions.
Chapter 2: “Overview” provides an overview of the document.
Chapter3: “UE910 Module Connections” deals with the pin out configuration and layout.
Chapter 4: “Hardware Commands” How to operate on the module via hardware.
Chapter 5: “Power supply” Power supply requirements and general design rules.
Chapter 6: “GSM/WCDMA Radio” The antenna connection and board layout design are the most important parts in the full product design.
Chapter 7: “Logic Level specifications” Specific values adopted in the implementation of logic levels for this module.
Chapter 8: “USB Port” The USB port on the Telit UE910 is the core of the interface between the module and OEM hardware
Chapter 9: “SPI port” Refers to the SPI port of the Telit UE910
Chapter 10: “USB HSIC” Refers to the USB HSIC port of the Telit UE910
Chapter 11: “Serial ports” Refers to the serial ports of the Telit UE910
Chapter 12: “Audio Section overview” Refers to the audio blocks of the Base Band Chip of the UE910 Telit Modules.
Chapter 13: “General Purpose I/O” How the general purpose I/O pads can be configured.
Chapter 14: “Mounting the UE910 on the application board” Mechanical dimensions and recommendations on how to mount the module on the user’s board.
Chapter 15: “Safety Recommendations” Information related to the Safety topics.
Chapter 16: “Conformity Assessment Issues” Information related to the Conformity Assessments.
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1.5 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.
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1.6 Related Documents

• Digital Voice Interface Application Note 80000NT10050A
• SPI Port Application Note 80000NT10053A
• SIM Holder Design Guides 80000NT10001a
• USB HSIC Port Application Note 80000NT10071A
• AT Commands Reference Guide 80378ST10091A
• Telit EVK2 User Guide 1vv0300704
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RReevviissiioonn
D
D
aatte
e
CChhaannggeess
ISSUE#0
2012-09-07
Preliminary Version
ISSUE#1
2013-04-10
Updated Chapters 5.2, 6.3, 6.4, 9, 11, 13.4, 15
ISSUE#2
2013-04-24
Updated Chapters 13.4, 15.2
ISSUE#3
2013-08-02
Updated Chapters 4, 5.1, 6.3, 12.4, 13.4, added Reel packaging chapter
ISSUE#4
2013-08-30
Updated Chapters 3.1, 4.1, 4.2, 5.2, 7, 8.1, 10, 12.1
ISSUE#5
2013-12-20
Updated Chapters 1.4, 1.6, 3.1, updated schematics and flow charts; added USB HSIC; updated packaging drawing; added PCB Guidelines for FCC.
ISSUE#6
2014-08-28
ISSUE#7
2015-05-25
Updated Chapter 14.8 Packing system (Tray)
ISSUE#8
2016-09-01
Updated Chapter 3.1.1 LGA Pads Layout – updated pin B1
ISSUE#9
2016-11-30
Updated Chapter 3.1 Pin Out – updated pin B1 (deleted from Reserved pin)
ISSUE#10
2017-04-27
Updated with UE910-GL product
ISSUE#11
2017-06-13
Updated Chapter 3.1 Pin Out
ISSUE#12
2017-06-13
Modified reference to 2014/53/EU Directive; Add Chapter 12.1.4 Electrical Characteristics;
ISSUE#13
2019-10-31
Section 14.7.1: Warning comment added Added Section 16.2: ANATEL Regulatory Notices
ISSUE#13
2020-11-17
Updated Section 16.2: ANATEL Regulatory Notices

1.7 Document History

1VV0301012 Rev.14 – 2020-11-17
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UE910

2 Overview

The aim of this document is the description of some hardware solutions useful for developing a product with the Telit UE910 module. In this document all the basic functions of a mobile phone will be taken into account; for each one of them a proper hardware solution will be suggested and eventually the wrong solutions and common errors to be avoided will be evidenced. Obviously this document cannot embrace the whole hardware solutions and products that may be designed. The wrong solutions to be avoided shall be considered as mandatory, while the suggested hardware configurations shall not be considered mandatory, instead the information given shall be used as a guide and a starting point for properly developing your product with the Telit UE910 module. For further hardware details that may not be explained in this document refer to the Telit UE910 Product Description document where all the hardware information is reported.
NOTICE:
(EN) The integration of the GSM/GPRS/WCDMA UE910 cellular module within user application shall be done according to the design rules described in this manual.
(IT) L’integrazione del modulo cellulare GSM/GPRS/WCDMA UE910 all’interno dell’applicazione dell’utente dovrà rispettare le indicazioni progettuali descritte in questo manuale.
(DE) Die Integration des UE910 GSM/GPRS/WCDMA Mobilfunk-Moduls in ein Gerät muß gemäß der in diesem Dokument beschriebenen Kunstruktionsregeln erfolgen.
(SL) Integracija GSM/GPRS/WCDMA UE910 modula v uporabniški aplikaciji bo morala upoštevati projektna navodila, opisana v tem priročniku.
(SP) La utilización del modulo GSM/GPRS/WCDMA UE910 debe ser conforme a los usos para los cuales ha sido deseñado descritos en este manual del usuario.
(FR) L’intégration du module cellulaire GSM/GPRS/WCDMA UE910 dans l’application de l’utilisateur sera faite selon les règles de conception décrites dans ce manuel.
(HE)
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.
1VV0301012 Rev.14 – 2020-11-17
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Power sense for the internal USB
transceiver.
Input for Request to send signal
(RTS) from DTE
Output for Clear to Send signal
(CTS) to DTE
D15
TX_AUX
O
Auxiliary UART (TX Data to DTE)
CMOS 1.8V
External SIM signal – Presence
(active low)
External SIM signal – Power supply
for the SIM
Not available on UE910-
xxD/UE910-GL
1VV0301012 Rev.14 – 2020-11-17

3 UE910 module connections

3.1 PIN-OUT

PAD Signal I/O Function Type COMMENT
USB HS 2.0 COMMUNICATION PORT
B15 USB_D+ I/O USB differential Data (+)
C15 USB_D- I/O USB differential Data (-)
A13 VUSB I
Asynchronous Serial Port (USIF0) - Prog. / Data + HW Flow Control
N15 C103/TXD I Serial data input from DTE CMOS 1.8V
M15 C104/RXD O Serial data output to DTE CMOS 1.8V
M14 C108/DTR I Input for (DTR) from DTE CMOS 1.8V
L14 C105/RTS I
CMOS 1.8V
P15 C106/CTS O
N14 C109/DCD O Output for (DCD) to DTE CMOS 1.8V
P14 C107/DSR O Output for (DSR) to DTE CMOS 1.8V
R14 C125/RING O Output for Ring (RI) to DTE CMOS 1.8V
Asynchronous Auxiliary Serial Port (USIF1)
E15 RX_AUX I
USB HSIC
A12 HSIC_USB_DATA I/O USB HSIC data signal CMOS 1.2V
A11 HSIC_USB_STRB I/O USB HSIC strobe signal CMOS 1.2V
H15 HSIC_SLAVE_WAKEUP I Slave Wake Up CMOS 1.8V Shared with SPI_MRDY
F15 HSIC_HOST_WAKEUP O Host Wake Up CMOS 1.8V Shared with SPI CLK
K15 HSIC_SUSPEND_REQUEST O Slave Suspend Request CMOS 1.8V Shared with GPIO08
J15 HSIC_HOST_ACTIVE I Active Host Indication CMOS 1.8V Shared with SPI_SRDY
SIM card interface
A6 SIMCLK O External SIM signal – Clock 1.8 / 3V
A7 SIMRST O External SIM signal – Reset 1.8 / 3V
A5 SIMIO I/O External SIM signal – Data I/O 1.8 / 3V
A4 SIMIN I
Auxiliary UART (RX Data from
DTE)
CMOS 1.8V
CMOS 1.8V
CMOS 1.8
A3 SIMVCC -
Analog Audio
B2 EAR+ O Analog Audio Interface (EAR+)
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1.8 / 3V
Not available on UE910­xxD/UE910-GL
Not available on UE910­xxD/UE910-GL
Not available on UE910­xxD/UE910-GL
GSM/EDGE/UMTS Antenna
(50 ohm)
N1
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B3 EAR- O Analog Audio Interface (EAR-)
B4 MIC+ I Analog Audio Interface (MIC+)
B5 MIC- I Analog Audio Interface (MIC-)
Digital Voice Interface (DVI)
B9 DVI_WA0 I/O Digital Audio Interface (WA0) CMOS 1.8V
B6 DVI_RX I/O Digital Audio Interface (RX) CMOS 1.8V
B7 DVI_TX I/O Digital Audio Interface (TX) CMOS 1.8V
B8 DVI_CLK I/O Digital Audio Interface (CLK) CMOS 1.8V
SPI
D15 SPI_MOSI I SPI MOSI CMOS 1.8V Shared with TX_AUX
E15 SPI_MISO O SPI_MISO CMOS 1.8V Shared with RX_AUX
F15 SPI_CLK I SPI Clock CMOS 1.8V
H15 SPI_MRDY I SPI_MRDY CMOS 1.8V
J15 SPI_SRDY O SPI_SRDY CMOS 1.8V
DIGITAL IO
C8 GPIO_01 I/O GPIO_01 /STAT LED CMOS 1.8V Alternate Function STAT LED
C9 GPIO_02 I/O GPIO_02 CMOS 1.8V
C10 GPIO_03 I/O GPIO_03 CMOS 1.8V
C11 GPIO_04 I/O GPIO_04 CMOS 1.8V
B14 GPIO_05 I/O GPIO_05 CMOS 1.8V
C12 GPIO_06 I/O GPIO_06 CMOS 1.8V
C13 GPIO_07 I/O GPIO_07 CMOS 1.8V
K15 GPIO_08 I/O GPIO_08 CMOS 1.8V
L15 GPIO_09 I/O GPIO_09 CMOS 1.8V
G15 GPIO_10 I/O GPIO_10 CMOS 1.8V
ADC
B1 ADC_IN1 AI Analog / Digital converter input A/D Accepted values 0 to 1.2V DC
RF SECTION
K1 ANTENNA I/O
Miscellaneous Functions
R13 HW_SHUTDOWN* I HW Unconditional Shutdown CMOS 1.8V Active low
RF
R12 ON_OFF* I Input command for power ON CMOS 1.8V Active low
C14 VRTC I VRTC Backup capacitor Power
R11 VAUX/PWRMON O
Power Supply
M1 VBATT - Main power supply (Baseband) Power
M2 VBATT - Main power supply (Baseband) Power
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backup for the embedded RTC
Supply Output for external
accessories / Power ON Monitor
VBATT_PA - Main power supply (Radio PA) Power
1.8V
supply
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N2 VBATT_PA - Main power supply (Radio PA) Power
P1 VBATT_PA - Main power supply (Radio PA) Power
P2 VBATT_PA - Main power supply (Radio PA) Power
E1 GND - Ground Power
G1 GND - Ground Power
H1 GND - Ground Power
J1 GND - Ground Power
L1 GND - Ground Power
A2 GND - Ground Power
E2 GND - Ground Power
F2 GND - Ground Power
G2 GND - Ground Power
H2 GND - Ground Power
J2 GND - Ground Power
K2 GND - Ground Power
L2 GND - Ground Power
R2 GND - Ground Power
M3 GND - Ground Power
N3 GND - Ground Power
P3 GND - Ground Power
R3 GND - Ground Power
D4 GND - Ground Power
M4 GND - Ground Power
N4 GND - Ground Power
P4 GND - Ground Power
R4 GND - Ground Power
N5 GND - Ground Power
P5 GND - Ground Power
R5 GND - Ground Power
N6 GND - Ground Power
P6 GND - Ground Power
R6 GND - Ground Power
P8 GND - Ground Power
R8 GND - Ground Power
P9 GND - Ground Power
P10 GND - Ground Power
R10 GND - Ground Power
M12 GND - Ground Power
B13 GND - Ground Power
P13 GND - Ground Power
E14 GND - Ground Power
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C7
N9
RESERVED
-
RESERVED
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RESERVED
C1 RESERVED - RESERVED
D1 RESERVED - RESERVED
B2 RESERVED - RESERVED
C2 RESERVED - RESERVED
D2 RESERVED - RESERVED
B3 RESERVED - RESERVED
C3 RESERVED - RESERVED
D3 RESERVED - RESERVED
E3 RESERVED - RESERVED
F3 RESERVED - RESERVED
G3 RESERVED - RESERVED
H3 RESERVED - RESERVED
J3 RESERVED - RESERVED
K3 RESERVED - RESERVED
L3 RESERVED - RESERVED
B4 RESERVED - RESERVED
C4 RESERVED - RESERVED
B5 RESERVED - RESERVED
C5 RESERVED - RESERVED
C6 RESERVED - RESERVED
RESERVED - RESERVED
N7 RESERVED - RESERVED
P7 RESERVED - RESERVED
N8 RESERVED - RESERVED
A10 RESERVED - RESERVED
N10 RESERVED - RESERVED
N11 RESERVED - RESERVED
B12 RESERVED - RESERVED
D12 RESERVED - RESERVED
N12 RESERVED - RESERVED
P12 RESERVED - RESERVED
F14 RESERVED - RESERVED
G14 RESERVED - RESERVED
H14 RESERVED - RESERVED
J14 RESERVED - RESERVED
K14 RESERVED - RESERVED
N13 RESERVED - RESERVED
L13 RESERVED - RESERVED
J13 RESERVED - RESERVED
M13 RESERVED - RESERVED
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Product
Audio
Notes
UE910-EUR
YES
Analog and digital audio
UE910-EUD
NO
Reserved Pads:,B2, B3, B4, B5
UE910-NAR
YES
Analog and digital audio
UE910-NAD
NO
Reserved Pads:,B2, B3, B4, B5
UE910-GL
YES
Digital Audio; Reserved Pads:B2, B3, B4, B5
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K13 RESERVED - RESERVED
H13 RESERVED - RESERVED
G13 RESERVED - RESERVED
F13 RESERVED - RESERVED
B11 RESERVED - RESERVED
B10 RESERVED - RESERVED
A9 RESERVED - RESERVED
A8 RESERVED - RESERVED
D14 RESERVED - RESERVED
A14 RESERVED - RESERVED
D13 RESERVED - RESERVED
E13 RESERVED - RESERVED
F1 RESERVED - RESERVED
R9 RESERVED - RESERVED
R7 RESERVED - RESERVED
P11 RESERVED - RESERVED
WARNING:
Reserved pins must not be connected.
NOTE 1:
The following table is listing the main Pinout differences between the UE910 variants
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PAD
Signal
Notes
M1,M2,N1,N2,P1,P2
VBATT & VBATT_PA
E1,G1,H1,J1,L1,A2,E2,F2,G2,H2,
R8,P9,P10,R10,M12,B13,P13,E14
R12
ON/OFF* R13
HW_SHUTDOWN*
B15
USB_D+
If not used should be connected to a
Test Point or an USB connector
C15
USB_D-
If not used should be connected to a
Test Point or an USB connector
A13
VUSB
If not used should be connected to a
Test Point or an USB connector
N15
If not used should be connected to a
Test Point
M15
If not used should be connected to a
Test Point
L14
C105/RTS
If the flow control is not used it should
be connected to GND
P15
C106/CTS
If not used should be connected to a
Test Point
D15
TXD_AUX
If not used should be connected to a
Test Point
E15
RXD_AUX
If not used should be connected to a
Test Point
K1
MAIN ANTENNA
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NOTE:
If not used, almost all pins should be left disconnected. The only exceptions are the following pins:
J2,K2,L2,R2,M3,N3,P3,R3,D4,M4,
N4,P4,R4,N5,P5,R5,N6,P6,R6,P8,
GND
C103/TXD
C104/RXD
RTS pin should be connected to the GND (on the module side) if flow control is not used.
The above pins are also necessary to debug the application when the module is assembled on it so we recommend connecting them also to dedicated test point.
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A B C D E F G H J K L M N P R

3.1.1 LGA Pads Layout

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TOP VIEW
1 ADC_IN1 RES RES GND RES GN D GND GN D ANT GND VBATT
2 GND SPK+ RES RES GND GND GND GND GND GND GN D VBATT
3 SIMVCC SPK - RES RES RES RES RES RES RES RES RES GND GND GND GND
4 S IMIN MIC+ RES GND GND GND GND GND
5 SIMIO MIC - RES GND GND GND
6 SIMCLK DVI_RX RE S GND GND GND
7 SIMRST DVI_TX RES RES RES RES
8 RES DVI_CLK GPIO_01 RES GND GND
9 RES DVI_WA0 GPIO_02 RES GND RES
10 RES RES GPI O_03 RES GN D GND
HSIC_US
11
B_STRB
RES GPIO_04 RES RES
VBATT_PA VBATT_P
VBATT_PA VBATT_P
A
A
GND
VAUX/PW
RMON
HSIC_US
12
B_DATA
13 VUSB GND GPI O_07 RES RES RES RES RES RES RES RES RES RES GND
14 RES GPIO_05 VRTC RES GND RES RES RES RES RE S C105/RTS C108/DTR
15 USB_D+ USB_D- TX AU X RX AUX SPI_CLK GPIO_10
RES GPIO_06 RES GND RES RES ON_OFF*
C109/DC
C107/DSR
D
SPI_MRDY SPI_SRD
GPIO_08 GP IO_09 C104/RXD C103/TXD C106/CTS
Y
NOTE:
The pin defined as RES has to be considered RESERVED and not connected on any pin in the application.
HW_SHU TDOWN*
C125/RIN
G
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4 Hardware Commands

4.1 Turning ON the UE910

To turn on the UE910 the pad ON_OFF* must be tied low for at least 5 seconds and then released.
The maximum current that can be drained from the ON_OFF* pad is 0,1 mA. A simple circuit to do it is:
1VV0301012 Rev.14 – 2020-11-17
NOTE:
Don't use any pull up resistor on the ON_OFF* line, it is internally pulled up. Using pull up resistor may bring to latch up problems on the UE910 power regulator and improper power on/off of the module. The line ON_OFF* must be connected only in open collector or open drain configuration.
NOTE:
In this document all the lines that are inverted, hence have active low signals are labelled with a name that ends with”#",”*” or with a bar over the name.
TIP:
To check if the device has powered on, the hardware line PWRMON should be monitored.
NOTE:
It is mandatory to avoid sending data to the serial ports during the first 200ms of the module start-up.
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“Modem ON Proc”
START
Y
Y
GOTO
unconditional”
GOTO
“Start AT CMD.”
N
PWMON = ON ?
PWMON = ON ?
N
Delay 1s
ON_OFF* = LOW
Delay = 5 Sec
ON_OFF* = HIGH
“Modem ON Proc”
END
VBATT > 3.22V ?
Y
N
A flow chart showing the proper turn on procedure is displayed below:
1VV0301012 Rev.14 – 2020-11-17
“HW SHUTDOWN
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AT answer in
N
Y
“Start AT CMD.”
START
DELAY 300msec
Enter AT<CR>
“Start AT CMD.”
END
GOTO
unconditional”
GOTO
“Modem ON Proc.”
1VV0301012 Rev.14 – 2020-11-17
A flow chart showing the AT commands managing procedure is displayed below:
1 sec ?
“HW SHUTDOWN
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1VV0301012 Rev.14 – 2020-11-17
NOTE:
In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the UE910 when the module is powered off or during an ON/OFF transition.
For example: 1- Let's assume you need to drive the ON_OFF* pad with a totem pole output of a +3/5 V microcontroller (uP_OUT1):
2- Let's assume you need to drive the ON_OFF* pad directly with an ON/OFF button:
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 21 of 88
1VV0301012 Rev.14 – 2020-11-17
WARNING
It is recommended to set the ON_OFF* line LOW to power on the module only after VBATT is higher than 3.22V. In case this condition it is not satisfied you could use the HW_SHUTDOWN* line to recover it and then restart the power on activity using the ON_OFF * line.
An example of this is described in the following diagram:
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 22 of 88
1VV0301012 Rev.14 – 2020-11-17
After HW_SHUTSDOWN* is released you could again use the ON_OFF* line to power on the module.
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 23 of 88
1VV0301012 Rev.14 – 2020-11-17

4.2 Turning OFF the UE910

Turning off of the device can be done in two ways:
• via AT command (see UE910 Software User Guide, AT#SHDN)
• by tying low pin ON_OFF*
Either ways, the device issues a detach request to network informing that the device will not be reachable any more. To turn OFF the UE910 the pad ON_OFF* must be tied low for at least 3 seconds and then released.
TIP:
To check if the device has been powered off, the hardware line PWRMON must be monitored. The device is powered off when PWRMON goes low.
NOTE:
In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the UE910 when the module is powered off or during an ON/OFF transition.
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 24 of 88
Modem OFF Proc.
START
AT
Y
N
PWMON = ON ?
OFF Mode
ON_OFF* = LOW
Delay >= 3 Sec
ON_OFF* = HIGH
“Modem OFF Proc”
END
PWRMON=ON?
Y N Key
AT#SHDN
GOTO
Looping for more
than 15s ?
Y
N
The following flow chart shows the proper turn off procedure:
1VV0301012 Rev.14 – 2020-11-17
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 25 of 88
“HW SHUTDOWN
Unconditional”
1VV0301012 Rev.14 – 2020-11-17

4.3 UE910 Unconditional Shutdown

The Unconditional Shutdown of the module could be activated using the
HW_SHUTDOWN* line (pad R13).
WARNING:
The hardware unconditional Shutdown must not be used during normal operation of the device since it does not detach the device from the network. It shall be kept as an emergency exit procedure.
To unconditionally shutdown the UE910, the pad least 200 milliseconds and then released.
NOTE:
Do not use any pull up resistor on the HW_SHUTDOWN* line nor any totem pole digital output. Using pull up resistor may bring to latch up problems on the UE910 power regulator and improper functioning of the module. The line HW_SHUTDOWN* must be connected only in open collector configuration.
The HW_SHUTDOWN* is generating an unconditional shutdown of the module without an automatic restart.
The module will shutdown, but will NOT perform the detach from the cellular network.
To proper power on again the module please refer to the related paragraph (“Powering ON the UE910”)
TIP:
The unconditional hardware shutdown must always be implemented on the boards and should be used only as an emergency exit procedure.
HW_SHUTDOWN* must be tied low for at
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A typical circuit is the following:
For example:
1VV0301012 Rev.14 – 2020-11-17
1- Let us assume you need to drive the HW_SHUTDOWN* pad with a totem pole output of
a +3/5 V microcontroller (uP_OUT2):
NOTE:
In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the UE910 when the module is powered off or during an ON/OFF transition.
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 27 of 88
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