Telit Communications S p A DE910-DUAL DUAL BAND CDMA/GPS module User Manual

Telit Communications S.p.A. DUAL BAND CDMA/GPS module

Contents

User Manual

                   DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 2 of 77 APPLICABILITY TABLE        PRODUCT DE910-DUAL DE910-SC
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 3 of 77 SPECIFICATIONS 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  entirely  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.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 4 of 77 Usage and Disclosure Restrictions 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. 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 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. 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.   Copyright © Telit Communications S.p.A. 2013.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 5 of 77 Contents 1. Introduction ................................................. 8 1.1. Scope ..................................................... 8 1.2. Audience .................................................. 8 1.3. Contact Information, Support .............................. 8 1.4. Document Organization ..................................... 9 1.5. Text Conventions ......................................... 10 1.6. Related Documents ........................................ 10 2. General Product Description ................................. 11 2.1. Overview ................................................. 11 2.2. Product Specifications ................................... 12 2.3. RoHS Compliance .......................................... 13 3. DE910 Module Connections .................................... 14 3.1. Pin-Out .................................................. 14 3.1.1. LGA Pads Layout (DE910-DUAL) ............................... 19 3.1.2. LGA Pads Layout (DE910-SC) ................................. 20 4. Hardware Commands ........................................... 21 4.1. Turning on the DE910 module .............................. 21 4.1.1. Initialization and Activation State ........................ 21 4.2. Turning off the DE910 module ............................. 23 4.2.1. Shutdown by Software Command ............................... 24 4.2.2. Hardware Shutdown .......................................... 24 4.3. Hardware Reset ........................................... 25 4.3.1. Hardware Unconditional Shutdown ............................ 25 4.4. Summary of Turning ON and OFF the Module ................. 26 5. Power Supply ................................................ 27 5.1. Power Supply Requirements ................................ 27 5.2. General Design Rules ..................................... 29 5.2.1. Electrical Design Guidelines ............................... 29 5.2.2. + 5V Input Source Power Supply Design Guidelines ........... 29 5.2.3. +12V Input Source Power Supply Design Guidelines ........... 30 5.2.4. Battery Source Power Supply Design Guidelines .............. 31 5.2.5. Thermal Design Guidelines .................................. 31
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 6 of 77 5.2.6. Power Supply PCB layout Guidelines ......................... 32 6. Antenna ..................................................... 35 6.1. CDMA Antenna Requirements ................................ 35 6.1.1. CDMA antenna – PCB line Guidelines ......................... 36 6.1.2. PCB Guidelines in case of FCC certification ................ 37 6.1.3. CDMA Antenna – Installation Guidelines ..................... 39 6.2. Antenna Diversity Requirements ........................... 40 6.3. GNSS Antenna Requirements ................................ 41 6.3.1. Combined GNSS Antenna ...................................... 41 6.3.2. Linear and Patch GNSS Antenna .............................. 41 6.3.3. The Design Considerations to enhanced GNSS performance ..... 41 6.3.4. GNSS Antenna – PCB Line Guidelines ......................... 44 6.3.5. GNSS Antenna – Installation Guidelines ..................... 44 7. USB Port .................................................... 45 8. Serial Port ................................................. 46 8.1. Modem Serial Port 1 ...................................... 47 8.2. Modem Serial Port 2 ...................................... 48 8.3. RS232 Level Translation .................................. 48 9. Audio Section Overview ...................................... 51 9.1. Electrical Characteristics ............................... 51 9.1.1. CODEC Example .............................................. 51 10. General Purpose I/O ......................................... 52 10.1. Logic Level Specification .............................. 53 10.2. Using a GPIO Pad as Input .............................. 53 10.3. Using a GPIO Pad as Output ............................. 54 10.4. Using the Temperature Monitor Function ................. 54 10.4.1. Short Description ........................................ 54 10.5. Indication of Network Service Availability ............. 55 10.6. RTC Bypass Output ...................................... 56 10.7. VAUX/PWRMON Power Output ............................... 57 11. DAC and ADC section ......................................... 58 11.1. DAC Converter .......................................... 58 11.1.1. Description .............................................. 58
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 7 of 77 11.1.2. Enabling DAC ............................................. 58 11.1.3. Low Pass Filter Example .................................. 59 11.2. ADC Converter .......................................... 59 11.2.1. Description .............................................. 59 11.2.2. Using ADC Converter ...................................... 59 12. Test Point .................................................. 60 13. Mounting the Module on your Board ........................... 61 13.1. General ................................................ 61 13.2. Module Finishing & Dimensions .......................... 61 13.3. Recommended foot print for the application ............. 62 13.4. Stencil ................................................ 63 13.5. PCB Pad Design ......................................... 63 13.6. Recommendations for PCB Pad Dimensions (mm) ............ 63 13.7. Solder Paste ........................................... 65 13.7.1. Solder Reflow ............................................ 65 14. Packing System .............................................. 67 14.1. Tray ................................................... 67 14.2. Reel ................................................... 69 14.2.1. Carrier Tape Detail ...................................... 69 14.2.2. Reel Detail .............................................. 70 14.2.3. Packaging Detail ......................................... 70 14.3. Moisture Sensibility ................................... 71 15. Application Design Guide .................................... 72 15.1. Download and Debug Port ................................ 72 16. Conformity Assessment Issues (Problèmes d'évaluation de conformité)...................................................... 73 17. Safety Recommendations ...................................... 76 18. Document History ............................................ 77
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 8 of 77 1. Introduction 1.1. Scope The  aim  of  this  document  is  the  description  of  typical  hardware  solutions  useful  for developing a product with the Telit DE910 module.  1.2. Audience This document is intended for Telit customers who are about to implement their applications using our DE910 modules. 1.3. Contact Information, Support For general contact,  technical support, to report documentation  errors and to order  manuals, contact Telit 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  to  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 Technical Support Center (TTSC). Our aim  is to  make this  guide  as  helpful as possible.  Please  keep us informed  of  comments and suggestions for improvements. Telit appreciates feedback from the users of our information.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 9 of 77 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: “General Product Description” gives an overview of the features of the product. Chapter 3: “DE910 Module Connections” deals with the pin out configuration and layout. Chapter 4: “Hardware Commands” How to operate the module via hardware. Chapter 5: “Power supply” Power supply requirements and general design rules.  Chapter 6: “Antenna” The antenna connection and board layout design are the most important parts in the full product design.  Chapter 7: “USB Port” The USB port on the Telit DE910 is the core of the interface between the module and OEM hardware. Chapter 8: “Serial ports” Refers to the serial ports of the Telit DE910. Chapter 9: “Audio Section overview” Refers to the audio blocks of the Base Band Chip of the DE910 Telit Module.  Chapter 10: “General Purpose I/O” How the general purpose I/O pads can be configured.  Chapter 11: “DAC and ADC section” Deals with these two kinds of converters.  Chapter 12: “Test Pont” Deals with Test Point.  Chapter  13:  “Mounting  the  DE910  on  the  application  board”  Mechanical  dimensions  and recommendations on how to mount the module on the user’s board. Chapter 14: “Packing System” Deals with packing system.  Chapter 15: “Application Design Guide” Deals with the design of host system for download or upgrade.  Chapter  16:  “Conformity  Assessment  Issues”  provides  some  fundamental  hints  about  the conformity assessment that the final application might need. Chapter 17: “Safety Recommendation” provides some safety recommendations  that  must  be followed by the customer in the design of the application that makes use of the Telit DE910.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 10 of 77 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.  1.6. Related Documents  Digital Voice Interface Application Note, 80000NT10061A  Product Description, 80392ST10096A  Telit EVK2 User Guide, 1vv0300704
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 11 of 77 2. General Product Description 2.1. Overview The  aim  of  this  document  is  the  description  of  typical  hardware  solutions  useful  for developing a product with the Telit DE910 module. In this document all the basic functions of a mobile device 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 all hardware solutions and  products  that  may be designed.  Avoiding the  discussed wrong  solutions  must  be  considered  as  mandatory.  While  the  suggested  hardware configurations  must  not  be  considered  mandatory,  the  information  given  must  be  used as  a guide and a starting point for properly developing a product with the Telit DE910 module.  NOTE: The  integration  of  the  CDMA  1xRTT/1xEV-DO  Rev.  A  module  within  a  user  application must be done according to the design rules described in this manual.  The information presented in this document is believed to be accurate and reliable. However, no  responsibility  is  assumed  by  Telit  Communication  S.p.A.  for  its  use,  such  as  any infringement of patents or other rights of third parties. No license is granted by implication or otherwise  under  any  patent  rights  of  Telit  Communication  S.p.A.  other  than  for  circuitry embodied in Telit products. This document is subject to change without notice.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 12 of 77 2.2. Product Specifications  DE910 Specifications Air Interface   CDMA 1xRTT  CDMA 1xEV-DO Rev. A Frequency Bands   DE910-DUAL: 800/1900MHz  DE910-SC: 800MHz Data Service  CDMA 1xRTT: 153.6 Kbps (full-duplex)  CDMA 1xEV-DO Rev. A: 3.1Mbps (F/L),                                              1.8Mbps (R/L) Location solution  gpsOne Max. RF out power  CDMA BC0: Power class 3 (24.4dBm) for 1xRTT,           Power class 3 (24dBm) for 1xEV-DO  CDMA BC1: Power class 2 (24.4dBm) for 1xRTT, Power class 2 (24dBm) for 1xEV-DO Typical conducted sensitivity a. CDMA  1xRTT: Better than –108dBm  1xEV-DO: Better than –109dBm b. GNSS  Acquisition sensitivity: –145dBm  Navigation sensitivity: –160dBm  Tracking sensitivity: –161dBm   Cold-start sensitivity: –145dBm  TTFF: 32 sec @–130dBm Device dimensions   28.2mm(L) x 28.2mm(W) x 2.05mm(T) Weight  3.8g Storage and Operating  Temperature Range  –40 ~ +85°C Normal operating voltage range 3.4 ~ 4.2V IO voltage  1.8V Hardware design   RX diversity on all band Interface  144 Land-Grid-Array interface  10 general I/O ports maximum including multi-functional I/Os  State LED output  1 A/D converter  1 D/A converter (PDM output)  Full RS232 CMOS UART: baud rate up to 4Mbps  Reserved two wires CMOS UART for debugging  USB 2.0: baud rate up to 480Mbps Antenna  Primary antenna  RX Diversity antenna  GPS&GLONASS antenna
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 13 of 77 Audio  PCM interface for Digital audio Message  SMS (MO/MT) Approvals  Regulatory:  - DE910-DUAL: FCC, IC - DE910-SC: CCC, SRRC  Carrier: Verizon, Sprint, Aeris   2.3. RoHS Compliance As  a part  of  Telit’s  corporate policy of  environmental  protection,  the DE910  complies with the  RoHS  (Restriction  of  Hazardous  Substances)  directive  of  the  European  Union  (EU Directive 2011/65/EU).
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 14 of 77 3. DE910 Module Connections 3.1. Pin-Out Pin Signal  I/O Function  Type USB HS 2.0 Communication Port B15 USB_D+ I/O USB differential Data(+)  C15 USB_D- I/O USB differential Data(-)  A13 VBUS I Power sense for the internal USB transceiver 5V Asynchronous UART – 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 Data terminal ready signal (DTR) from DTE CMOS 1.8V L14 C105/RTS I Input for Request to send signal (RTS) from DTE CMOS 1.8V P15 C106/CTS O Output for Clear to send signal (CTS) to DTE CMOS 1.8V N14 C109/DCD O Output for Data carrier detect signal (DCD) to DTE CMOS 1.8V P14 C107/DSR O Output for Data set ready signal (DSR) to DTE CMOS 1.8V R14 C125/RING O Output for Ring indicator signal (RI) to DTE CMOS 1.8V Asynchronous Auxiliary UART D15 TX_AUX O Auxillary UART (TX Data to DTE) CMOS 1.8V E15 RX_AUX I Auxillary UART (RX Data from DTE) CMOS 1.8V RUIM Card Interface A3 RUIMVCC - External RUIM signal - Power supply for the SIM 1.8/3V A5 RUIMIO I/O External RUIM signal - Data I/O 1.8/3V A6 RUIMCLK  O External RUIM signal - Clock  1.8/3V A7 RUIMRST O External RUIM signal - Reset 1.8/3V Digital Voice interface (DVI) B9 DVI_WA0 I/O Digital Voice interface (WA0) CMOS 1.8V B6 DVI_RX I Digital Voice interface (RX) CMOS 1.8V B7 DVI_TX O Digital Voice interface (TX) CMOS 1.8V B8 DVI_CLK I/O Digital Voice interface (CLK) CMOS 1.8V Digital IO C8 GPIO_01 I/O GPIO_01 / STAT LED CMOS 1.8V 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 / DAC_OUT 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 Section B1 ADC_IN1 AI Analog/Digital converter input A/D RF Section
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 15 of 77 Pin Signal  I/O Function  Type K1 ANTENNA I/O CDMA Antenna (50Ohm) RF F1 ANT_DIV I CDMA Antenna Diversity Input (50Ohm) RF GPS Section R9 ANT_GPS I GPS Antenna (50Ohm) RF R7 GPS_LNA_EN O Output enable for External LNA supply CMOS 1.8V Miscellaneous Function R13  HW_SHUTDOWN*  I  Hardware unconditional shutdown CMOS 1.8V Open collector R12  ON_OFF*  I  Input Command for Power ON/Software shutdown CMOS 1.8V Open collector C14 VRTC I VRTC Backup Capacitor Power  R11  VAUX/PWRMON  O Supply Output for external accessories / Power ON Monitor  1.8V Test Point C3 TP1  Test Point TP C4 TP2  Test Point TP C5 TP3  Test Point TP C6 TP4  Test Point TP C7 TP5  Test Point TP D3 TP6  Test Point TP E3 TP7  Test Point TP Power Supply M1 VBATT - Main Power Supply (Baseband) Power M2 VBATT - Main Power Supply (Baseband) Power N1 VBATT_PA - Main Power Supply (PAM) Power N2 VBATT_PA - Main Power Supply (PAM) Power P1 VBATT_PA - Main Power Supply (PAM) Power P2 VBATT_PA - Main Power Supply (PAM) Power E1 GND - Ground  G1 GND - Ground  H1 GND - Ground  J1 GND - Ground  L1 GND - Ground  A2 GND - Ground  E2 GND - Ground  F2 GND - Ground  G2 GND - Ground  H2 GND - Ground  J2 GND - Ground  K2 GND - Ground  L2 GND - Ground  R2 GND - Ground  M3 GND - Ground  N3 GND - Ground  P3 GND - Ground  R3 GND - Ground  D4 GND - Ground
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 16 of 77 Pin Signal  I/O Function  Type M4 GND - Ground  N4 GND - Ground  P4 GND - Ground  R4 GND - Ground  N5 GND - Ground  P5 GND - Ground  R5 GND - Ground  N6 GND - Ground  P6 GND - Ground  R6 GND - Ground  P8 GND - Ground  R8 GND  Ground  P9 GND - Ground  P10 GND - Ground  R10 GND - Ground  M12 GND - Ground  B13 GND - Ground  P13 GND - Ground  E14 GND - Ground  Reserved C1 Reserved - Reserved  D1 Reserved - Reserved  B2 Reserved - Reserved  C2 Reserved - Reserved  D2 Reserved - Reserved  B3 Reserved - Reserved  F3 Reserved - Reserved  G3 Reserved - Reserved  H3 Reserved - Reserved  J3 Reserved - Reserved  K3 Reserved - Reserved  L3 Reserved - Reserved  A4 Reserved - Reserved  B4 Reserved - Reserved  B5 Reserved - Reserved  N7 Reserved - Reserved  P7 Reserved - Reserved  A8 Reserved - Reserved  N8 Reserved - Reserved  A9 Reserved - Reserved  N9 Reserved - Reserved  A10 Reserved - Reserved  B10 Reserved - Reserved  B11 Reserved - Reserved  N10 Reserved - Reserved  A11 Reserved - Reserved  N11 Reserved - Reserved
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 17 of 77 Pin Signal  I/O Function  Type P11 Reserved - Reserved  A12 Reserved - Reserved  B12 Reserved - Reserved  D12 Reserved - Reserved  N12 Reserved - Reserved  P12 Reserved - Reserved  D13 Reserved - Reserved  E13 Reserved - Reserved  F13 Reserved - Reserved  G13 Reserved - Reserved  H13 Reserved - Reserved  J13 Reserved - Reserved  K13 Reserved - Reserved  L13 Reserved - Reserved  M13 Reserved - Reserved  N13 Reserved - Reserved  A14 Reserved - Reserved  D14 Reserved - Reserved  F14 Reserved - Reserved  G14 Reserved - Reserved  H14 Reserved - Reserved  J14 Reserved - Reserved  K14 Reserved - Reserved  F15 Reserved - Reserved  H15 Reserved - Reserved  J15 Reserved - Reserved   NOTE: RUIM  interface  is  reserved  for  Verizon/Sprint/Aeris  variants  and  it  is  applicable  only  to RUIM variants of DE910 (DE910-SC)  WARNING: Reserved pins must not be connected.  NOTE: The following table is listing the main Pinout differences between the DE910 variants. Product  BC0  BC1  GPS  Notes DE910-DUAL  Yes  Yes  Yes  Reserved pads: A3, A5, A6, A7 DE910-SC  Yes  No  Yes
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 18 of 77  NOTE: Almost  all  pins not in use  must  be left disconnected. The  only exceptions are the following pins: PAD  Signal   M1,M2,N1,N2,P1,P2 VBATT&VBATT_PA  E1,G1,H1,J1,L1,A2,E2,F2,G2,H2,J2,K2,L2,R2,M3,N3,P3,R3,D4,M4,N4,P4,R4,N5,P5,R5,N6,P6,R6,P8,R8,P9,P10,R10,M12,B13,P13,E14 GND   R12 ON_OFF*  R13  HW_SHUTDOWN*   B15  USB_D+ If not used should be connected to a Test Point C15  USB_D- If not used should be connected to a Test Point A13  VBUS If not used should be connected to a Test Point N15  C103/TXD If not used should be connected to a Test Point M15  C104/RXD 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  F1  ANT_DIV (If  supported by the product) If  not  used it  could  be  left unconnected,  but  has  to  be disabled  by  the  related  AT Command  (AT#RXDIV):  please refer to the AT User Guide for the related syntax R9 ANT_GPS (If supported by the product) If the GPS is not used  it could be left unconnected C3,C4,C5,C6,C7,D3,E3 Test Point   RTS must 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 incorporating the module.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 19 of 77  3.1.1. LGA Pads Layout (DE910-DUAL)  A B C D E F G H J K L M N P R1 ADC_IN1 RES RES GND ANT_DIV GND GND GND ANTENNA G ND VBATT VBATT_PA VBATT_PA 12 GND RES RES RES GND GND GND GND GND GND GND VBATT VBATT_PA VBATT_PA GND 23RES RES TP1 TP6 TP7 RES RES RES RES RES RES GND GND GND GND 34RES RES TP2 GND   GND GND GND G ND 45RES RES TP3 GND GND GND 56RES DVI_ RX TP4 GND GND GND 67RES DVI_ TX TP5 RES RES GPS_LNA_EN78RES DVI_CLK GPIO_01 RES GND GND 89RES DVI_ WA0 GPIO_02 RES GND ANT_GPS 910 RES RES GPIO_03 RES GND GND 1011 RES RES GPIO_04 RES RES VAUX/PW RMON 1112 RES RES GPIO_06 RES GND RES RES ON_OFF* 1213 USB_VBUS G ND GPIO_07 RES RES RES RES RES RES RES R ES RES RES GND HW_SHUTDOWN* 1314 RES GPIO_05 VRTC RES GND RES RES RES RES RES C105/RTS C108/DTR C109/DCD C107/DSR C125/RING 1415 USB_D+ USB_D- TX_AUX RX_ AUX RES GPIO_10 RES RES GPIO_08 GPIO_09 C104/RXD C103/TXD C106/CTS 15A B C D E F G H J K L M N P R Top View  NOTE: The pin defined as RES must be considered RESERVED and not connected on any pin in the application. The related area on the application has to be kept empty.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 20 of 77 3.1.2. LGA Pads Layout (DE910-SC)  A B C D E F G H J K L M N P R1 ADC_IN1 RES RES GND ANT_DIV GND GND GND ANTENNA G ND VBATT VBATT_PA VBATT_PA 12 GND RES RES RES GND GND GND GND GND GND GND VBATT VBATT_PA VBATT_PA GND 23 RUIMVCC RES TP1 TP6 TP7 RES RES RES RES RES RES GND GND GND GND 34RES RES TP2 GND   GND GND GND G ND 45 RUIMIO RES TP3 GND GND GND 56 RUIMCLK DVI_ RX TP4 GND GND G ND 67 RUIMRST DVI_TX TP5 RES RES GPS_LNA_EN78RES DVI_CLK GPIO_01 RES GND GND 89RES DVI_ WA0 GPIO_02 RES GND ANT_GPS 910 RES RES GPIO_03 RES GND GND 1011 RES RES GPIO_04 RES RES VAUX/PW RMON 1112 RES RES GPIO_06 RES GND RES RES ON_OFF* 1213 USB_VBUS G ND GPIO_07 RES RES RES RES RES RES RES R ES RES RES GND HW_SHUTDOWN* 1314 RES GPIO_05 VRTC RES GND RES RES RES RES RES C105/RTS C108/DTR C109/DCD C107/DSR C125/RING 1415 USB_D+ USB_D- TX_AUX RX_ AUX RES GPIO_10 RES RES GPIO_08 GPIO_09 C104/RXD C103/TXD C106/CTS 15A B C D E F G H J K L M N P R Top View  NOTE: The pin defined as RES must be considered RESERVED and not connected on any pin in the application. The related area on the application has to be kept empty.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 21 of 77 4. Hardware Commands 4.1. Turning on the DE910 module To  turn  on  the  DE910,  the  pad  ON_OFF*  must  be  tied  low  for  at  least  1  second  and  then released. The maximum current that can be drained from the ON_OFF* pad is 0.1 mA.  A simple circuit to power on the module is illustrated below:   4.1.1. Initialization and Activation State Upon  turning  on  DE910  module,  the  DE910  module  is  not  active  yet  because  the  boot sequence  of  DE910  is  still  executing  internally.  It  takes  about  10  seconds  to  complete  the initialization of the module internally. For this  reason,  it  would  be  useless  to  try  to access  DE910  during the Initialization  state as below.  The  DE910  module  needs  at  least  10  seconds  after  the  PWRMON  goes  High  to become operational by reaching the activation state.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 22 of 77 During the Initialization state, any kind of AT-command is not available.  DTE must wait for the Activation state to communicate with DE910. To  check  if  the  DE910  has  powered  on,  the  hardware  line  PWRMON  must  be  monitored. When PWRMON goes high, the module has powered on.  NOTE: Do not use any pull up resistor on the ON_OFF* line. It is pulled up internally. Using a pull up resistor may bring latch up problems on the DE910 power regulator and improper power on/off  of  the  module.  The  line  ON_OFF*  must  be  connected  only  in  open  collector configuration.  NOTE: In  this document  all the  lines are inverted.  Active low signals  are  labeled  with a  name that ends with "*" or with a bar over the name.  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 DE910 module when the module is powered OFF or during an ON/OFF transition.  For example: 1. To  drive  the  ON_OFF*  pad  with  a  totem  pole  output  of  a  +3/5  V  microcontroller (uP_OUT1):  2. To drive the ON_OFF* pad directly with an ON/OFF button:
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 23 of 77  4.2. Turning off the DE910 module Turning off the device can be done in two ways:  By software command (see DE910 Software User Guide)  By hardware shutdown When  the  device is  shut down by software command  or by  hardware  shutdown,  it  issues  a detach  request  to  the  network  that  informs  the  network  that  the  device  will  no  longer  be reachable. 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  DE910  when  the  module  is  powered  OFF  or during an ON/OFF transition.  The following flow chart shows the proper turnoff procedure:
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 24 of 77 4.2.1. Shutdown by Software Command The DE910 can be shut down by a software command. When a shutdown command  is sent, the DE910 goes into the finalization state and will shut down PWRMON at the end of this state. The period of the finalization state can vary according to the state of the DE910 so it cannot be fixed definitely. Normally it  will  be above 10  seconds after  sending a  shutdown  command and  DTE  should monitor the status of PWRMON to see the actual power off.  TIP: To check  if the device has powered off hardware line PWRMON must be monitored. When PWRMON goes low, the device has powered off.  4.2.2. Hardware Shutdown To turn OFF the DE910 the pad ON_OFF* must be tied low for at least 2 seconds and then released. The same circuitry and timing for the power on must be used. When  the  hold  time  of  ON_OFF*  is  above  2  seconds, the  DE910  goes  into the finalization state and will shut down PWRMON at the end of this state. The period of the finalization state can vary according to the state of the DE910 so it cannot be fixed definitely. Normally it will be above 10 seconds after releasing ON_OFF* and DTE should monitor the status of PWRMON to see the actual power off.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 25 of 77  TIP: To check if the device has powered off, hardware line PWRMON must be monitored. When PWRMON goes low, the device has powered off.  4.3. Hardware Reset  WARNING: The Hardware Reset  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  be done in the rare case that the device gets stuck waiting for some network. 4.3.1. Hardware Unconditional Shutdown To unconditionally shutdown the DE910, the pad HW_SHUTDOWN* must be tied low for at least 200 milliseconds and then released.  A simple circuit to unconditionally shutdown the module is illustrated below:   NOTE: Do  not  use  any  pull  up  resistor  on  the  HW_SHUTDOWN*  line  or  any  totem  pole  digital output. Using a pull up resistor may bring latch up problems on the DE910 power regulator and  result  in  improper  functioning  of  the  module.  The  line  HW_SHUTDOWN*  must  be connected only in open collector configuration.  TIP: The  unconditional  hardware  Shutdown  must  always  be  implemented  on  the  boards  and  the software must use it only as an emergency exit procedure.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 26 of 77  For example: To drive the  HW_SHUTDOWN* pad with a totem pole  output of a +3/5 V  microcontroller (uP_OUT2):  4.4. Summary of Turning ON and OFF the Module The chart below describes the overall sequences for turning the module ON and OFF.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 27 of 77 5. Power Supply The  power  supply  circuitry  and  board  layout  are  a  very  important  part  in  the  full  product design  and  they  strongly  reflect  on  the  product’s  overall  performance.  Read  carefully  the requirements and the guidelines that follow for a proper design. 5.1. Power Supply Requirements The  external  power  supply  must be connected to VBATT &  VBATT_PA signals and  must fulfill the following requirements: Power Supply Nominal Supply Voltage  3.8V Normal Operating Voltage Range  3.4V ~ 4.2V Extended Operating Voltage Range  3.3V ~ 4.5V  NOTE: The  Operating  Voltage  Range MUST  never  be  exceeded.  Special care  must be taken  when designing the application’s power supply section to avoid having an excessive voltage drop. If the voltage drop is exceeding the limits it could cause a Power Off of the module.. Behavior in the extended operating voltage range might deviate from 3GPP2 specification.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 28 of 77 Current Consumption Mode Average (mA)  Mode Description Power off current (Typical)  15uA(*1) Standby mode  No call in progress (slot cycle index=2, hybrid mode) AT+CFUN=1 GPS=off <15 Normal mode; full functionality of the module GPS=on <65 AT+CFUN=4 GPS=off <25  Disabled TX and RX; modules is not registered on the network GPS=on <70 AT+CFUN=5 GPS=off <2.5(*2) Full  functionality  with  power  saving;  Module registered  on  the  network  can  receive  incoming  call sand SMS GPS=on <65 Tx and Rx mode  A call in progress Antenna Diversity=off GPS=off 670 CDMA 1x call GPS=on 735 Antenna Diversity=on GPS=off 700 GPS=on 705 Antenna Diversity=off GPS=off 650 1xEV-DO call GPS=on 730 Antenna Diversity=on GPS=off 640 GPS=on 685 (*1)The off current is the total supply current from the main battery with the PMIC off and the 32 kHz XTAL oscillator on. (*2) Standby current consumption depends on network configuration or module configuration.  NOTE: The Operating Voltage Range MUST never be exceeded. Special care must be taken in order to fulfill min/max supply voltage requirement.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 29 of 77  TIP: The  electrical  design for the  power  supply should be  made  ensuring it  will  be  capable  of a peak current output of at least 1A.  5.2. General Design Rules The principal guidelines for the Power Supply Design embrace three different design steps:  the electrical design  the thermal design  the PCB layout 5.2.1. Electrical Design Guidelines The  electrical  design  of the  power  supply  depends strongly  on  the  power  source  where this power is drained. We will distinguish them into three categories:  +5V input  (typically PC internal regulator output)  +12V input (typically automotive)  Battery 5.2.2. +  5V  Input  Source  Power  Supply  Design Guidelines  The  desired  output  for  the  power  supply  is  3.8V,  hence  there  is  not  a  big difference  between  the input  source  and  the  desired  output so  a linear  regulator can be used.  A  switching  power  supply  will not  be  suitable  because  of  the  low drop-out requirements.  When  using  a  linear  regulator,  a  proper  heat  sink  must  be  provided  in  order  to dissipate the power generated.  A  Bypass low ESR capacitor of adequate capacity  must be  provided in  order to cut the current absorption peaks close to the DE910. A 100μF tantalum capacitor is usually suited.  Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is rated at least 10V.  A protection diode must be inserted close to the power input in order to save the DE910 from power polarity inversion.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 30 of 77 An example of a linear regulator with 5V input:   5.2.3. +12V  Input  Source  Power  Supply  Design Guidelines  The desired output for the power supply is 3.8V, hence due to the big difference between the input source and the desired output, a linear regulator is not suitable and must not be used. A switching power supply would be preferable because of its  better  efficiency,  especially  with  the  1A  peak  current  load  represented  by DE910.  When  using  a  switching  regulator,  a  500  kHz  or  more  switching  frequency regulator is preferable because of its smaller inductor size and its faster transient response.  This  allows  the  regulator  to  respond  quickly  to  the  current  peaks absorption.   In  any  case,  the  frequency  and  switching  design  selection  is  related  to  the application  to  be  developed  due  to  the  fact  the  switching  frequency  could  also generate EMC interferences.  For car PB battery the input voltage can rise up to 15.8V and this must be kept in mind  when  choosing  components:  all  components  in  the  power  supply  must withstand this voltage.  A  bypass  low  ESR  capacitor  of adequate capacity  must  be  provided  in  order  to cut the current absorption peaks. A 100μF tantalum capacitor is usually suited for this.  Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is rated at least 10V.  For car applications a spike protection diode  must be inserted close to the power input in order to clean the supply from spikes.   A protection diode must be inserted close to the power input in order to save the DE910 from  power  polarity inversion.  This  can  be the same  diode as  for  spike protection.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 31 of 77  An example of switching regulator with 12V input is in the schematic below:  5.2.4. Battery Source Power Supply Design Guidelines The desired nominal output for the power supply is 3.8V and the maximum voltage allowed is 4.2V. A single 3.7V lithium-ion cell battery type is ideal to supply power to the Telit DE910 module.  WARNING: The  three  battery  cells  (Ni/Cd  or  Ni/MH  3.6V  nom.  battery  types  or  4V  PB  types)  MUST NOT  be used  directly because their  maximum  voltage  can rise  over  the absolute  maximum voltage for the DE910 and cause damage. USE only Li-Ion battery types.  A  bypass  low (usually a 100uF tantalum) ESR capacitor with adequate capacity must be provided in order to cut the current absorption peaks.   Make sure the low ESR capacitor (usually a tantalum) is rated at least 10V.   A  protection  diode  must be inserted  close to the power input in  order to  protect the DE910 module from power polarity inversions when connecting the battery.  The  battery capacity  must  be  at  least  500mAh in order to  withstand the current peaks of 1A. The suggested battery capacity is from 500mAh to 1000mAh. 5.2.5. Thermal Design Guidelines The  thermal  design  for  the  power  supply  heat  sink  must  be  done  with  the  following specifications:  Average current consumption during CDMA 1x / 1xEV-DO transmission @PWR level max : 750 mA
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 32 of 77  Average  GPS  current  during  GPS  ON  (Power  Saving  disabled)  in  DE910  :  55 mA  NOTE: The  average  consumption  during  transmissions  depends  on  the  power  level  at  which  the device is requested to transmit via the network. The average current consumption hence varies significantly. Considering  the  very  low  current  during  idle,  especially  if  the  Power  Saving  function  is enabled,  it  is  possible  to  consider  from  the  thermal  point  of  view  that  the  device  absorbs current significantly only during calls.  If we assume that the device stays in transmission  for short periods of time (a few  minutes) and  then remains for quite a long time  in idle  (one  hour), then the power supply always has time to cool down between the calls and the heat sink could be smaller than the calculated for 750mA maximum RMS current. There could even be a simple chip package (no heat sink). Moreover in average network conditions the device is requested to transmit at a lower power level than the maximum and hence the current consumption will be less than 750mA (usually around 250 mA). For these  reasons the thermal  design is rarely a concern and the simple  ground plane where the power supply chip is placed can be enough to ensure a good thermal condition and avoid overheating. The  heat  generated  by  the  DE910  must  be  taken  into  consideration  during  transmission  at 24.4dBm max during calls. This generated heat will be mostly conducted to the ground plane under the DE910.  The application must be able to dissipate heat. In  the  CDMA  1x/1xEV-DO  mode,  since  DE910  emits  RF  signals  continuously  during transmission, special attention must be paid to how to dissipate the heat generated. The  current  consumption  will  be  up  to  about  750mA  in  CDMA  1x  continuously  at  the maximum TX output power (24.4dBm). Thus, you  must arrange the area on the application PCB must be as large as possible under DE910. The  DE910  must  be  mounted  on  the  large  ground  area  of  the  application  board  and  make many ground vias to dissipate the heat.  5.2.6. Power Supply PCB layout Guidelines As seen in the electrical design guidelines, the power supply must have a low ESR capacitor on the output to cut the current peaks and a protection diode on the input to protect the supply from  spikes  and  polarity  inversion.  The  placement  of  these  components  is  crucial  for  the correct operation of the circuitry. A misplaced component can be useless or can even decrease the power supply performance.  The  bypass  low  ESR  capacitor  must  be  placed  close  to  the  Telit  DE910  power input pads, or if the power supply is a switching type, the capacitor can be placed close  to  the  inductor  to  cut  the  ripple  if  the  PCB  trace  from  the  capacitor  to
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 33 of 77 DE910  is  wide  enough  to  ensure  a  drop-less  connection  even  during  the  1A current peaks.  The protection diode must be placed close to the input connector where the power source is drained.  The PCB traces from the input connector to the power regulator IC must be wide enough to ensure no voltage drops occur when the 1A current peaks are absorbed. While a voltage drop of hundreds of mV may be acceptable from the power loss point of view, the same voltage drop may not be acceptable from the noise point of view. If the application does not have an audio interface but only uses the data feature  of  the  Telit  DE910,  then  this  noise  is  not  as  disruptive  and  the  power supply layout design can be more forgiving.  The  PCB  traces  to  DE910  and  the  Bypass  capacitor  must  be  wide  enough  to ensure no significant voltage drops occur when the 1A current peaks are absorbed. This is  a  must  for  the same  above-mentioned reasons. Try to keep this  trace as short as possible.  The PCB traces connecting the switching output to the inductor and the switching diode must be kept as short as possible by placing the inductor and the diode very close to the power switching IC (only for switching power supply). This is done in order  to reduce the  radiated field (noise)  at  the  switching frequency  (usually 100-500 kHz).  The use of a good common ground plane is suggested.  The  placement  of  the  power  supply  on  the  board  must  be  done  in  a  way  to guarantee  that  the  high  current  return  paths  in  the  ground  plane  are  not overlapped  with  any  noise  sensitive  circuitry  such  as  the  microphone amplifier/buffer or earphone amplifier.  The  power supply input  cables  must  be  kept  separate  from noise sensitive lines such as microphone/earphone cables.   The insertion of EMI filter on VBATT pins is suggested in  those  designs where antenna is placed close to battery or supply lines.                                                A  ferrite  bead  like  Murata  BLM18EG101TN1  or  Taiyo  Yuden  P/N FBMH1608HM101 can be used for this purpose.   The below figure shows the recommended circuit:
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 34 of 77
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 35 of 77 6. Antenna  The  antenna  connection  and  board  layout  design  are  the  most  important  parts  in  the  full product design and they strongly reflect on the product’s overall performance. Read carefully and follow the requirements and the guidelines for a proper design. 6.1. CDMA Antenna Requirements The antenna for a Telit DE910 device must fulfill the following requirements: CDMA Antenna Requirements Frequency range Depending on the frequency  band(s)  provided  by  the network  operator,  the  customer  must  use  the  most  suitable antenna for that/those band(s) Bandwidth 70 MHz in CDMA BC0 140 MHz in CDMA BC1 Gain Gain < 5.12dBi in CDMA BC0 Gain < 6.12dBi in CDMA BC1 Impedance  50 Ohm Input power  > 24.4dBm Average Power in CDMA VSWR absolute max  ≤ 5:1 (Limit to avoid permanent damage) VSWR recommended  ≤ 2:1 (Limit to fulfill all regulatory requirement) When using the Telit DE910, since there’s no antenna connector on the module, the antenna must  be  connected  to  the  DE910  antenna  pad  (K1)  by  means  of  a  transmission  line implemented in the PCB. In the case that the antenna is not directly connected at the antenna pad of the DE910, then a PCB line is required.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 36 of 77 This transmission line shall fulfill the following requirements: Antenna Line on PCB Requirements Characteristic Impedance  50Ohm Max Attenuation  0.3dB Coupling with other signals shall be avoided Cold End (Ground Plane) of antenna shall be equipotential to the DE910 ground pads Furthermore if the device is developed for the US and/or Canada market, it must comply with the FCC and/or IC approval requirements:  This device is to be used only for  mobile and fixed application. 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  co-located  or  operating  in  conjunction  with  any  other  antenna  or transmitter. End-Users must  be provided  with  transmitter operation conditions for satisfying RF  exposure  compliance.  OEM  integrators  must  ensure  that  the  end  user  has  no  manual instructions  to  remove  or  install  the  DE910  module.  Antennas  used  for  this  OEM  module must not exceed 5dBi gain for mobile and fixed operating configurations. 6.1.1. CDMA antenna – PCB line Guidelines  Make sure that the transmission line’s characteristic impedance is 50ohm.  Keep line on the PCB as short as possible since the antenna line loss shall be less than around 0.3dB.  Line  geometry  should  have  uniform  characteristics,  constant  cross  section,  avoid meanders and abrupt curves.  Any  kind  of  suitable  geometry/structure  (  Microstrip,  Stripline,  Coplanar,  Grounded Coplanar  Waveguide  …  )  can be used  for  implementing  the  printed  transmission  line afferent the antenna.  If  a  Ground  plane  is  required  in  line  geometry,  that  plane  has  to  be  continuous  and sufficiently  extended  so  the  geometry  can  be  as  similar  as  possible  to  the  related canonical model.  Keep,  if  possible,  at  least  one  layer  of  the  PCB  used  only  for  the  Ground  plane;  If possible, use this layer as reference Ground plane for the transmission line.  It is wise to surround (on both sides) of the PCB transmission line with Ground. Avoid having other signal tracks facing directly the antenna line track.  Avoid  crossing  any  un-shielded  transmission  line  footprint  with  other  tracks  on different layers.  The  Ground  surrounding  the  antenna  line  on  PCB  has  to  be  strictly  connected  to  the main Ground  plane by means of via holes  (once  per 2mm at least) placed close to  the ground edges facing line track.  Place EM noisy devices as far as possible from DE910 antenna line.  Keep the antenna line far away from the DE910 power supply lines.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 37 of 77  If EM noisy devices are present on the PCB hosting the DE910, such as fast switching ICs, take care of shielding them with a metal frame cover.  If EM noisy devices are not present around the line, use of geometries like Micro strip or  Grounded  Coplanar  Waveguide  are  preferred  since  they  typically  ensure  less attenuation when compared to a Strip line having same length.  6.1.2. PCB Guidelines in case of FCC certification In  the  case  FCC  certification  is  required  for  an  application  using  DE910-DUAL, according  to  FCC  KDB  996369  for  modular  approval  requirements,  the  transmission line has to be similar to that implemented on module’s interface board and described in the following chapter. 6.1.2.1.1.1. Transmission line design During the design of the DE910 interface board, the placement of components has been chosen properly, in  order  to  keep the  line  length as  short  as  possible,  thus  leading  to lowest  power  losses  possible.  A  Grounded  Coplanar  Waveguide  (G-CPW)  line  has been  chosen, since this kind of transmission line  ensures good  impedance control and can  be  implemented  in  an  outer  PCB  layer  as  needed  in  this  case.  A  SMA  female connector has been used to feed the line.  The  interface  board  is  realized  on  a  FR4,  4-layers  PCB.  Substrate  material  is characterized by relative permittivity εr = 4.6 ± 0.4 @ 1 GHz, TanD= 0.019 ÷ 0.026 @ 1 GHz.  A  characteristic  impedance  of  nearly  50  Ω  is  achieved  using  trace  width  =  1.1  mm, clearance  from  coplanar  ground  plane  =  0.3  mm  each  side.  The  line  uses  reference ground  plane  on  layer  3,  while  copper  is  removed  from  layer  2  underneath  the  line. Height of trace above ground plane is 1.335 mm. Calculated characteristic impedance is 51.6 Ω, estimated line loss is less than 0.1 dB. The line geometry is shown below:
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 38 of 77  6.1.2.1.1.2. Transmission line measurements HP8753E VNA (Full-2-port calibration) has been used in this measurement session. A calibrated  coaxial  cable  has  been  soldered  at  the  pad  corresponding  to  RF  output;  a SMA connector has been soldered to the board in order to characterize the losses of the transmission  line  including  the  connector  itself.  During  Return  Loss  /  impedance measurements, the transmission line has been terminated to 50 Ω load.  Return Loss plot of line under test is shown below:   Line input impedance (in Smith Chart format, once the line has been terminated to 50 Ω load) is shown in the following figure:
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 39 of 77  Insertion Loss of G-CPW line plus SMA connector is shown below:   6.1.3. CDMA Antenna – Installation Guidelines   Install the antenna in a place covered by the CDMA signal.   If the  device  antenna  in the application is  located greater  then  20cm  from  the  human body and  there are  no  co-located transmitters  then  the Telit FCC/IC approvals  can be re-used by the end product.  Antenna shall not be installed inside metal cases.  Antenna shall be installed also according antenna manufacture instructions.  WARNING: Consider a mechanical design and a low-capacitance ESD protection device to protect DE910 or customer specific requirements from ESD event to Antenna port (K1).
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 40 of 77 6.2. Antenna Diversity Requirements This product includes an input for a second RX antenna to improve the radio sensitivity. The function is called Antenna Diversity. CDMA Antenna Diversity Requirements Frequency range Depending  frequency  band(s)  provided  by  the  network  operator, the  customer  must  use  the  most  suitable  antenna  for  that/those band(s) Bandwidth 70 MHz in CDMA BC0 140 MHz in CDMA BC1 Impedance  50 Ohm When using the Telit DE910, since there’s no antenna connector on the module, the antenna must  be  connected  to  the  DE910  antenna  pad  (F1)  by  means  of  a  transmission  line implemented on the PCB. In the case that the antenna is not directly connected at the antenna pad of DE910, then a PCB line is required.  NOTE: If  the  RX  Diversity  is  not  used/connected,  disable  the  Diversity  functionality  using  the AT#CRXD  command  and  leave  the  pad  F1  unconnected.  Please  refer  to  the  AT  command User Guide in detail.  WARNING: Consider a mechanical design and a low-capacitance ESD protection device to protect DE910 or customer specific requirements from ESD event to Antenna port (F1).
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 41 of 77 6.3. GNSS Antenna Requirements The use of an active GNSS antenna is required to achieve better performance. The module is provided with a Digital Output signal to enable the external LNA (pad R7). Parameter  Min  Max Output high level  1.35V  1.8V Output low level  0.0V  0.45V  6.3.1. Combined GNSS Antenna The  use  of  combined  CDMA/GNSS  antenna  is  not  recommended.    This  solution  could generate  extremely  poor  GNSS  reception  and  also  the  combined  antenna  requires  an additional diplexer and adds a loss in the RF route.  6.3.2. Linear and Patch GNSS Antenna Using this type of antenna introduces at least 3dB of loss if compared to a circularly polarized (CP)  antenna.  Having  a  spherical  gain  response  instead  of  a  hemispherical  gain  response could aggravate the multipath behaviour & create poor position accuracy.  6.3.3. The Design Considerations to enhanced GNSS performance Depending on the characteristics and requirements unique to the customer’s designs, the use of  an  external  LNA  or  an  external  active  antenna  may  be  required  to  achieve  best performance. The optional external LNA should be  dimensioned to avoid an  excessive LNA gain that can introduce jamming, spurious, degrade IIP3, and saturate the receiver.   The configurations of an external device must fulfill the following requirements:  An external passive antenna (GPS only)  An external active antenna (GPS or GNSS)  An external passive antenna, GNSS pre-Filter , and GNSS LNA (GPS or GNSS)
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 42 of 77 NOTE: The external GNSS LNA and GNSS pre-Filter shall be required for GLONASS application. GNSS LNA requirement shall fulfill the following specifications.  Frequency = 1565 ~ 1606MHz  Power Gain|S21|2 = 14 ~ 17dB  NF < 1dB GNSS pre-Filter requirement shall fulfill the following requirements.  Source and Load Impedance = 50Ohm  Insertion Loss (1575.42 ~ 1576.42MHz) = 1.4dB (Max)  Insertion Loss (1565.42 ~ 1585.42MHz) = 2.0dB (Max)  Insertion Loss (1597.5515 ~ 1605.886MHZ) = 2.0dB (Max)  The  external  active  antenna  for  the  Telit  DE910  device  must  fulfill  the  following requirements: GNSS Antenna Requirements Frequency range 1575.42MHz (GPS L1) 1597.55 ~ 1605.89MHz (GLONASS) Bandwidth ±1.023MHz (GPS L1) 8.34MHz (GLONASS) Impedance  50 Ohm LNA NF  < 1dB LNA  Gain  14 ~ 17dB LNA Input Voltage  3.0V or 5.0V  NOTE: The  maximum  DC  voltage  applicable  to  ANT_GPS  pin  is  5V.  In  case  this  is  exceeded,  a series capacitor has to be  included  in the design to avoid exceeding the maximum input DC level.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 43 of 77 An example of GNSS antenna supply circuit is shown in the following image:   When using the Telit DE910, since there’s no antenna connector on the module, the antenna must be connected to the DE910 through the PCB with the antenna pad.  In the case that the antenna is not directly connected at the antenna pad of the DE910, then a PCB line is required. This line of transmission shall fulfill the following requirements: Antenna Line on PCB Requirements Characteristic Impedance  50Ohm Max Attenuation  0.3dB Coupling with other signals shall be avoided Cold End (Ground Plane) of antenna shall be equipotential to the DE910 ground pads Furthermore if the device is developed for the US and/or Canada market, it must comply with the FCC and/or IC requirements. This device is to be used only for mobile and fixed application.    WARNING: The  DE910  software  is  implemented  differently  depending  on  the  configurations  of  an external device. Please refer to the AT command User Guide in detail.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 44 of 77 6.3.4. GNSS Antenna – PCB Line Guidelines  Ensure that the antenna line impedance is 50ohm.  Keep line on the PCB as short as possible to reduce the loss.  Antenna line must have uniform characteristics, constant cross section, avoid meanders and abrupt curves.  Keep one layer of the PCB used only for the Ground plane; if possible.  Surround (on the sides, over and under) the antenna line on PCB with Ground.   Avoid having other signal tracks directly facing the antenna line track.  The  Ground  around the antenna  line  on PCB  has to be  strictly  connected to  the  main Ground plane by placing vias once per 2mm at least.  Place EM noisy devices as far as possible from DE910 antenna line.  Keep the antenna line far away from the DE910 power supply lines.   If EM noisy devices are around the PCB hosting the DE910, such as fast switching ICs, take  care  of  shielding  of  antenna  line  by  burying  it  inside  the  layers  of  PCB  and surround it with Ground planes; or shield it with a metal frame cover.  If you do not have EM noisy devices around the PCB of DE910, use a strip line on the superficial  copper layer for the antenna line. The  line  attenuation will be lower than a buried one. 6.3.5. GNSS Antenna – Installation Guidelines  The DE910,  due  to its sensitivity characteristics,  is capable  of performing a fix inside buildings.  However, the sensitivity could be affected by the building characteristics i.e. shielding.  The Antenna must not be co-located or operating in conjunction with any other antenna or transmitter.  Antenna shall not be installed inside metal cases.  Antenna shall be installed also according antenna manufacture instructions.  WARNING: Consider a mechanical design and a low-capacitance ESD protection device to protect DE910 or customer specific requirements from ESD event to GPS port (R9).
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 45 of 77 7. USB Port The  DE910  module  includes  a  Universal  Serial  Bus  (USB)  transceiver,  which  operates  at USB high-speed (480Mbits/sec).  It  is  compliant  with  the  USB  2.0  specification  and  can  be  used  for  diagnostic  monitoring, control and data transfers. The table below describes the USB interface signals:                          Pin Signal  I/O Function  Type B15 USB_D+  I/O USB differential Data(+)   C15 USB_D-  I/O USB differential Data(-)   A13  VBUS  I  Power sense for the internal USB transceiver  5V   The  USB_DPLUS  and  USB_DMINUS  signals  have  a  clock  rate  of  480MHz.  The  signal traces should be routed carefully. Trace lengths, number of vias and capacitive loading should be minimized. The impedance value should be as close as possible to 90 Ohms differential.  WARNING: Consider a mechanical design and a low-capacitance ESD protection device to protect DE910 or customer specific requirements from ESD event to USB lines (B15, C15 and A13).
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 46 of 77 8. Serial Port The serial ports on the Telit DE910 are the interface between the module and OEM hardware.  2 serial ports are available on the module:  Modem Serial Port 1 (Main)  Modem Serial Port 2 (Auxiliary) Several configurations can be designed for the serial port on the OEM hardware.  The most common are:  RS232 PC comport  Microcontroller UART@1.8V(Universal Asynchronous Receiver Transmit)  Microcontroller UART@5V or other voltages different from 1.8V Depending on the type of serial port on the OEM hardware, a level translator circuit may be needed to make the system work.  Serial port 1 is a +1.8V UART with all the 7 RS232 signals.  Serial port 2 is a +1.8V Auxiliary UART.  The electrical characteristics of the serial port are explained in the following tables: Absolute Maximum Ratings -Not Functional Parameter  Min  Max Input level on non-power pin with respect to ground  -0.3  +2.3V  Operating Range - Interface levels Parameter  Min  Max Input high level  1.5V  2.1 V Input low level  -0.3V  0.35V Output high level  1.35V  1.8V Output low level  0V  0.45V
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 47 of 77 8.1. Modem Serial Port 1 Serial port 1 on the DE910 is a +1.8V UART with all 7 RS232 signals.  It differs from the PC-RS232 in the signal polarity (RS232 is reversed) and levels. Pin Signal  I/O Function  Type N14  DCD  O  Data Carrier Detect  1.8V M15 RXD  O  Transmit line *see Note  1.8V N15  TXD  I  Receive line *see Note  1.8V M14 DTR  I  Data Terminal Ready  1.8V P14  DSR  O  Data Set Ready  1.8V L14  RTS  I  Request to Send  1.8V P15  CTS  O  Clear to Send  1.8V R14  RI  O  Ring Indicator  1.8V  The  following  table  shows  the  typical  input  value(pulled  inside  the  baseband  chipset)  and status for input lines all module states: Signal/State OFF  RESET  ON  Powersaving PU tied to TXD unknown PD: 21K~210K PU: 39K~390K PU: 39K~390K  1.8V RTS PD: 21K~210K DTR PU: 39K~390K  NOTE: For  minimum  implementation,  only  the  TXD  and  RXD  lines  must  be  connected,  the  other lines can be left open provided a software flow control is implemented.  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 DE910 when the module is powered off or during an ON/OFF transition.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 48 of 77  NOTE: According to V.24, RX/TX signal names are referred to the application side. Therefore, on the DE910 side these signals are in  the  opposite  direction: TXD on the application side  will be connected to the receive line  (here named TXD/ rx_uart ) of the  DE910  serial port and vice versa for RX.  NOTE: High-speed  UART  supports  up  to  4Mbps.  Please  refer  to  the  AT  command  User  Guide  in detail.  WARNING: Consider a mechanical design and a low-capacitance ESD protection device to protect DE910 or customer specific requirements from ESD event to UART port (M15, N15, P15 and L14). 8.2. Modem Serial Port 2 Serial port 2 on the DE910 is a +1.8V UART with only the RX and TX signals.  The signals of the DE910 serial port are: Pin  Signal  I/O Function  Type D15  TX_AUX  O  Auxillary UART (TX Data to DTE)  1.8V E15  RX_AUX  I  Auxillary UART (RX Data from DTE)  1.8V 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 DE910 when the module is powered off or during an ON/OFF transition. 8.3. RS232 Level Translation In  order  to  interface  the  Telit  DE910  with  a  PC  com  port  or  a  RS232  (EIA/TIA-232) application, a level translator is required. This level translator must:  Invert the electrical signal in both directions  Change the level from 0/1.8V to +/-15V
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 49 of 77 Actually, the RS232 UART 16450, 16550, 16650 & 16750 chipsets accept signals with lower levels  on  the  RS232  side  (EIA/TIA-562),  allowing a lower  voltage-multiplying  ratio on  the level  translator. Note that the negative  signal voltage must be  less  than 0V and hence some sort of level translation is always required.  The simplest way  to translate the levels and  invert the signal is  by using  a single chip level translator. There are a multitude of them, differing in the number of drivers and receivers and in the levels (be sure to get a true RS232 level translator not a RS485 or other standards). By  convention  the  driver  is  the  level translator  from  the 0-1.8V UART  to the RS232  level. The receiver is the translator from the RS232 level to 0-1.8V UART.  In order to translate the whole set of control lines of the UART you will need:  5 drivers  3 receivers An  example  of  RS232  level  adaption  circuitry  could  be  accomplished  using  a  MAXIM transceiver (MAX218).  In  this  case  the  chipset  is  capable  of  translating  directly  from  1.8V  to  the  RS232  levels (Example on 4 signals only).    NOTE: In  this case the  length  of  the lines  on the application  has  to  be  taken  into  account to  avoid problems in case of High-speed rates on RS232.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 50 of 77 The  RS232  serial  port  lines  are  usually  connected  to  a  DB9  connector  with  the  following layout:
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 51 of 77 9. Audio Section Overview The DE910 module doesn’t support an analog audio interface and supports one Digital Audio bus.  In  order  to  develop  an  application  including  an  Analog  Audio  it  is  necessary  to  add  a dedicated CODEC on the Application design. For further information, please refer to the “Digital Voice Interface Application Note”.  9.1. Electrical Characteristics The product is providing one Digital Audio Interface (DVI) on the following Pins: Pin  Signal  I/O Function  Type B9  DVI_WA0  I/O Digital Voice interface (WA0) 1.8V B6  DVI_RX  I  Digital Voice interface (RX) B7  DVI_TX  O  Digital Voice interface (TX) B8  DVI_CLK  I/O Digital Voice interface (CLK)  9.1.1. CODEC Example Please refer to the Digital Voice Interface Application note.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 52 of 77 10. General Purpose I/O The general-purpose I/O pads can be configured to act in three different ways:  Input  Output  Alternate function (internally controlled)  Input pads can only be read and report the digital value (high or low) present on the pad at the read time. Output pads can only be written to set the value of the pad or queried. An alternate function pad is internally controlled by the DE910 firmware and acts depending on the function implemented.  The following GPIOs are available on the DE910. Pin Signal  I/O Function  Drive Strength Type C8  GPIO_01  I/O Configurable GPIO  2 mA  1.8V C9  GPIO_02 I/O Configurable GPIO 2 mA 1.8V C10  GPIO_03 I/O Configurable GPIO 2 mA 1.8V C11  GPIO_04 I/O Configurable GPIO 2 mA 1.8V B14  GPIO_05 I/O Configurable GPIO 2 mA 1.8V C12  GPIO_06 I/O Configurable GPIO 2 mA 1.8V C13  GPIO_07  I/O Configurable GPIO 2 mA  1.8V K15 GPIO_08 I/O Configurable GPIO  2 mA 1.8V L15  GPIO_09 I/O Configurable GPIO  2 mA 1.8V G15 GPIO_10 I/O Configurable GPIO  2 mA 1.8V
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 53 of 77 10.1. Logic Level Specification Where not specifically stated, all the interface circuits work at 1.8V CMOS logic levels. The following table shows the logic level specifications used in the DE910 interface circuits:  Absolute Maximum Ratings -Not Functional Parameter  Min  Max Input level on any digital pin (CMOS 1.8) with respect to ground -0.3V  2.3V  Operating Range - Interface levels (1.8V CMOS) Parameter  Min  Max Input high level  1.5V  2.1V Input low level  0.0V  0.35V Output high level  1.35V  1.8V Output low level  0.0V  0.45V   Current characteristics  Parameter   Typical Output Current  2mA Input Current  30uA  10.2. Using a GPIO Pad as Input The GPIO pads, when used as inputs, can be connected to a digital output of another device and  report  its  status,  provided  this  device  has  interface  levels  compatible  with  the  1.8V CMOS levels of the GPIO.  If  the  digital  output  of  the  device  is  connected  with  the  GPIO  input,  the  pad  has  interface levels different from the 1.8V CMOS. It can be buffered with an open collector transistor with a 4.7KΩ pull-up resistor to 1.8V.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 54 of 77 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  module  when  it  is powered OFF  or during  an ON/OFF transition.  10.3. Using a GPIO Pad as Output The GPIO pads, when used as outputs, can drive 1.8V CMOS digital devices or compatible hardware.  When  set  as  outputs,  the  pads  have  a  push-pull  output  and  therefore  the  pull-up resistor may be omitted.    10.4. Using the Temperature Monitor Function 10.4.1. Short Description The  Temperature  Monitor  is  a  function  of  the  module  that  permits  control  of  its  internal temperature and if properly set (see the #TEMPMON command on AT Interface guide) raises to High Logic level a GPIO when the maximum temperature is reached.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 55 of 77 10.5. Indication of Network Service Availability The  STAT_LED pin  status  shows  information  on  the  network  service  availability  and  Call status. In the DE910 modules, the STAT_LED usually needs an external transistor to drive an external  LED.  Because  of  the  above,  the  status  indicated  in  the  following  table  is  reversed with respect to the pin status:  LED status  Device Status Permanently off  Device off Fast blinking (Period 1s, Ton 0,5s)  Net search / Not registered / turning off Slow blinking (Period 3s, Ton 0,3s)  Registered full service Permanently on  a call is active
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 56 of 77 10.6. RTC Bypass Output The VRTC pin brings out the Real Time Clock supply, which is separate from the rest of the digital part, allowing only RTC to be active when all the other parts of the device are off. To this  power  output  a  backup capacitor  can  be  added  in  order  to increase  the  RTC  autonomy during power off of the battery. No devices must be powered from this pin. For  additional  details  on  the  Backup  solutions  please  refer  to  the  related  application  note (xE910 RTC Backup Application Note).  VRTC  also  supplies  reference  power  to  help  DE910  check  the  time  from  SMPL  (Sudden Momentary Power Loss). So it is recommended as best practice to connect VRTC to a shunt capacitor (VRTC to GND) and the acceptable capacitor value is:  Parameter  Min Keep-alive capacitor on Pad no. = C14  6.8uF  NOTE: SMPL (Sudden Momentary Power Loss) : SMPL feature initiates a power-on sequence if the monitored  system  voltage;  VBATT  drops  out  of  range  and  then  returns  in  range  within  a programmable interval. SMPL achieves immediate and automatic  recovery from  momentary power loss such as a brief battery disconnect.  NOTE: VBATT must be supplied in order to use RTC function.  NOTE: It is recommended to add a keep-alive capacitor on VRTC.  WARNING: NO devices must be powered from this pin.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 57 of 77 10.7. VAUX/PWRMON Power Output A  regulated  power  supply  output  is  provided  in  order  to  supply  small  devices  from  the module. This output is active when the module is ON and goes OFF when the module is shut down. The operating range characteristics of the supply are:  Operating Range – VAUX/PWRMON power supply Parameter  Min  Typical  Max Output voltage  1.77V  1.8V  1.83V Output current      200mA Output bypass capacitor (Inside the module)    2.2μF
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 58 of 77 11. DAC and ADC section 11.1. DAC Converter 11.1.1. Description The DE910 module provides a Digital to Analog Converter. The signal (named DAC_OUT) is  available  on  pin  C13  of  the  DE910  module  and  on  pin  6  of  PL302  on  Interface  Board (CS1467D). The  on board  DAC  is in the range  from  0  to  1023.  However,  an  external low-pass  filter is necessary. Parameter  Min  Max  Units Voltage range (filtered)  0  1.8  Volt Range  0  1023  Steps  The precision is 1023 steps, so since the maximum voltage is 2V, the integrated voltage could be calculated with the following formula: Integrated output voltage = 2 * value / 1023 DAC_OUT line must be integrated (for example with a low band pass filter) in order to obtain an analog voltage. 11.1.2. Enabling DAC An AT command is available to use the DAC function.  The command is:  AT#DAC[=<enable>[,<value>]] <value> - scale factor of the integrated output voltage (0..1023 ~ 10 bit precision) it must be present if <enable>=1 Refer to SW User Guide  or  AT Commands Reference  Guide  for the full description of this function.  NOTE: The  DAC  frequency  is  selected  internally.  D/A  converter  must  not  be  used  during POWERSAVING.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 59 of 77 11.1.3. Low Pass Filter Example .  11.2. ADC Converter 11.2.1. Description The on board ADC is 8-bit converter. It is able to read a voltage level in the range of 0 ~ 1.2 volts applied on the ADC pin input and store and convert it into 8 bit word. Parameter  Min  Max  Units Input Voltage range  0  1.2  Volt AD conversion  -  8  bits Resolution  -  <  10  mV Input Resistance  1    Mohm  The DE910 provides one Analog to Digital Converter.  The input lines are: ADC available on pin B1 and Pin 7 of PL102 on Interface Board (CS1467D) 11.2.2. Using ADC Converter An AT command is available to use the ADC function.  The command is AT#ADC=1,2.  The read value is expressed in mV Refer to SW User Guide  or  AT Commands Reference  Guide  for the full description of this function.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 60 of 77 12. Test Point These pins are needed in order to analyze DE910 on the application board. The signals of the DE910 are:  PAD Signal I/O Function Type C3  TP1    Test Point  TP C4 TP2  Test Point TP C5 TP3  Test Point TP C6 TP4  Test Point TP C7 TP5  Test Point TP D3 TP6  Test Point TP E3 TP7  Test Point TP
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 61 of 77 13. Mounting the Module on your Board 13.1. General The DE910 has been designed in order to be compliant with a standard lead-free SMT process.  13.2. Module Finishing & Dimensions                           Top view                                                                              Bottom view  (Dimensions in mm)
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 62 of 77 13.3. Recommended foot print for the application  144 pins < Top View >  In  order to easily rework the DE910 it is suggested to consider having a 1.5 mm placement inhibit area around the module on the application.  It is also suggested, as a common rule for an SMT component, to avoid having a mechanical part of the application in direct contact with the module.  NOTE: In  the  customer  application,  the  region  under  WIRING  INHIBIT  (see  figure)  must  be clear from signal or ground paths.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 63 of 77 13.4. Stencil Stencil’s apertures layout can be the same as the recommended  footprint (1:1). we suggest a thickness of stencil foil ≥ 120 µm.   13.5. PCB Pad Design Non solder mask defined (NSMD) type is recommended for the solder pads on the PCB.  PCB   13.6. Recommendations for PCB Pad Dimensions (mm)   It is not recommended to place via or micro-via not covered by solder resist in an area of 0.3 mm around the pads unless it carries the same signal as the pad itself (see following figure).
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 64 of 77  Holes in pad are allowed only for blind holes and not for through holes. Recommendations for PCB Pad Surfaces: Finish  Layer thickness (um) Properties Electro-less Ni / Immersion Au  3 ~ 7 / 0.05 ~ 0.15 good solder ability protection, high shear force values  The PCB must be able to resist the higher  temperatures which are occurring at the lead-free process. This issue should be discussed with the  PCB-supplier.  Generally, the wettability  of tin-lead  solder  paste  on  the  described  surface  plating  is  better  compared  to  lead-free  solder paste.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 65 of 77 13.7. Solder Paste Solder Paste  Lead free   Sn/Ag/Cu We  recommend  using  only  “no  clean”  solder  paste  in  order  to  avoid  the  cleaning  of  the modules after assembly.  13.7.1. Solder Reflow The following is the recommended solder reflow profile:   Profile Feature  Pb-Free Assembly Average ramp-up rate (TL to TP) 3℃/second max Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (min to max) (ts)  150℃ 200℃ 60 ~ 180 seconds Tsmax to TL - Ramp-up Rate  3℃/second max Time maintained above: - Temperature (TL) - Time (tL)  217℃ 60 ~150 seconds
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 66 of 77 Profile Feature  Pb-Free Assembly Peak Temperature (TP)  245 +0/-5℃ Time within 5℃ of actual Peak Temperature (tP)  10 ~30 seconds Ramp-down Rate  6 ℃/second max Time 25℃ to Peak Temperature  8 minutes max  NOTE: All temperatures refer to topside of the package, measured on the package body surface.  WARNING: The DE910 module withstands one reflow process only.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 67 of 77 14. Packing System The DE910 modules are packaged on trays of 20 pieces each. These trays can be used in SMT processes for pick & place handling. 14.1. Tray   WARNING: These trays can withstand a maximum temperature of 65℃.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 68 of 77
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 69 of 77 14.2. Reel The DE910 can be packaged on reels of 200 pieces each. See figure for module positioning into the carrier.   14.2.1. Carrier Tape Detail
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 70 of 77 14.2.2. Reel Detail   14.2.3. Packaging Detail
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 71 of 77  14.3. Moisture Sensibility The DE910 is a Moisture Sensitive Device level 3, in accordance with standard IPC/JEDEC J-STD-020, take care all the relatives requirements for using this kind of components. Moreover, the customer has to take care of the following conditions: a) Calculated shelf life in sealed bag: 12 months at <40°C and <90% relative humidity (RH).  b) Environmental condition during the production: 30°C / 60% RH according to IPC/JEDEC J-STD-033A paragraph 5.  c) The maximum time between the opening of the sealed bag and the reflow process must be 168 hours if condition b) “IPC/JEDEC J-STD-033A paragraph 5.2” is respected  d) Baking is required if conditions b) or c) are not respected  e) Baking is required if the humidity indicator inside the bag indicates 10% RH or more
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 72 of 77 15. Application Design Guide 15.1. Download and Debug Port One  of  the  following  options  should  be  chosen  in  the  design  of  host  system  in  order  to download or upgrade the Telit’s software and debug DE910 when DE910 is already mounted on a host system.  Users who use both of UART and USB interfaces to communicate DE910 -  Must  implement  a  download  method  in  a  host  system  for  upgrading  DE910  when  it’s mounted.  Users who use USB interface only to communicate DE910 -  Must arrange UART port in a host system for upgrading or debugging DE910 when it’s mounted.  Users who use UART interface only to communicate DE910 -  Must  arrange  USB  port  in  a  host  system  for  upgrading  or  debugging  DE910  when  it’s mounted.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 73 of 77 16. Conformity Assessment Issues (Problèmes d'évaluation de conformité) The DE910 is FCC/IC Approved as a module to be installed in other devices. This device should be used only for fixed and mobile applications and if the final product after integration is intended for portable use, a new application and FCC is required. Le DE910 est approuvé FCC/IC comme module à installer dans d'autres dispositifs. Ce dispositif doit être utilisé uniquement pour des applications fixes et mobiles et si le produit fini est prévu après intégration pour un usage portatif, une nouvelle application et la FCC est requise The user is cautioned that this device should be used only as specified within this manual to meet RF exposure requirements.  L'utilisateur est averti que ce dispositif doit être utilisé uniquement comme spécifié dans ce manuel pour répondre aux normes d'exposition aux ondes rf. Use of this device in a manner inconsistent with this manual could lead to excessive RF exposure conditions. L'utilisation de ce dispositif en quelque sorte contradictoire avec ce manuel a pu mener aux états excessifs d'exposition de rf. The DE910 conforms to the following US Directives: • Use of RF Spectrum. Standards: FCC47 Part 22&24 • EMC Standards:  FCC47 Part 15 Le DE910 est conforme aux directives suivantes des USA • Utilisation de spectre de rf. Normes : FCC47 partie 22&24 • Normes d'EMC : FCC47 partie 15  This device complies with Part 15 of the FCC Rules. Ce dispositif est conforme à la partie 15 des règles FCC. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference, including interference that may cause undesired operation of the device. Le fonctionnement est sujet aux deux conditions suivantes : (1) ce dispositif peut ne pas causer l'interférence nocive, et (2) ce dispositif doit accepter aucune interférence, y compris un interférence qui pourrait causer le fonctionnement non désiré du dispositif.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 74 of 77 The user must refer to below information to meet the FCC/IC's RF exposure rules and regulations when they design: Lors de la conception, l'utilisateur doit se référer à l'information ci-dessous pour remplir les conditions et règlementations  FCC/IC' d’exposition aux ondes RF: • The system antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all the persons and must not be co-located or operating in conjunction with any other antenna or transmitter. Le système d’antenne utilisé pour cet émetteur doit être installé à une distance d’au moins de 20 cm de toute personne et ne doit pas être co-implanté ou opérer en même temps que n'importe quelle autre antenne ou émetteur. • The system antenna(s) used for this module must not exceed 5.12dBi in CDMA BC0 and 6.12dBi in CDMA BC1 for mobile and fixed or mobile operating configurations. Le système d’ antenne utilisé pour ce module ne doit pas dépasser 5.12dBi en CDMA BC0 et 6.12dBi en CDMA BC1 pour des configurations mobiles et fixes ou des configurations opérant en mode mobile. • Users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance.  Manufacturers of mobile, fixed or portable devices incorporating this module are advised to clarify any regulatory questions and to have their complete product tested and approved for FCC compliance. Les instructions d’installation de l’antenne ainsi que les conditions de fonctionnement de l’émetteur doivent être remis aux utilisateurs et aux installateurs conformément à la règlementation sur l’exposition aux ondes rf. Des fabricants des dispositifs mobiles, fixes ou portables incorporant ce module sont invités à clarifier toutes les questions de normalisation et à avoir leur produit complètement testé pour la mise en conformité FCC. • DE910 is intended for the OEM integrator only. DE910 est prévu pour l'intégrateur OEM seulement. • The user is required to see the Grant of Equipment document for other restrictions. L'utilisateur doit se referrer au document « Grant of equipment » pour d'autres restrictions. • DE910 must be operated and used with a locally approved access point. DE910 doit être actionné et utilisé avec un point d'accès localement approuvé. • The radio transmitter(IC ID: 5131A-DE910DUAL) has been approved by Industry Canada to operate with the antenna type listed in this manual with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. L'émetteur radio (identification d'IC : 5131A-DE910DUAL) a été approuvé par Industry Canada pour fonctionner avec le type d'antenne énuméré dans ce manuel avec le gain autorisé maximum et l'impédance d’antenne exigée  pour chaque type d'antenne indiqué. Les types d'antenne non inclus dans cette liste, ayant un gain supérieur au gain maximum indiqué pour ce type, sont strictement interdits pour un usage avec ce dispositif. • If antenna is co-located or operating in conjunction with any other antenna or transmitter then additional FCC/IC testing may be required. Si l'antenne est co-situé ou opérant en conjonction avec tout autre antenne ou transmetteur puis tests FCC / IC supplémentaire peut être nécessaire.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 75 of 77 • This device is granted for use in Mobile only configurations only in which the antennas used for this transmitter must be installed to provide a separation distance of at least 20cm from all persons and not be co-located with any other transmitters except in accordance with FCC multi-transmitter product procedures. Ce dispositif est accordée pour une utilisation à Mobile Seules les configurations dans lequel seules les antennes utilisées pour cet émetteur doivent être installés pour fournir une distance de séparation d'au moins 20 cm de toutes les personnes et ne pas être co-localisés avec d'autres émetteurs sauf en conformité avec la FCC procédures de produits multi-émetteur.  • This module is not certified for simultaneous transmissions with other co-located transmitters. Additional testing and certification may be necessary when this module transmits simultaneously with any other radiating source. The OEM integrator is responsible for testing their end-product for any additional compliance requirements. If an intentional radiator incorporates more than one antenna or other radiating source and these radiating sources are designed to emit at the same time, measurements of conducted and radiated emissions shall be performed with all radiating sources that are to be employed emitting. In no event may the measured emissions of the composite system exceed the highest level permitted for an individual component. The OEM integrator must demonstrate that the final host product is compliant with all transmitters operating simultaneously, if applicable. Ce module est pas certifié pour transmissions simultanées avec d'autres émetteurs co-localisés. Essai et de certification supplémentaires peuvent être nécessaires lors de ce module transmet simultanément avec toute autre source de rayonnement. L'intégrateur OEM est responsable de tester leur produit final pour toutes les exigences de conformité supplémentaires. Si un radiateur intentionnel incorpore plus d'une antenne ou d'une autre source de rayonnement et de ces sources de rayonnement sont conçus pour émettre en même temps, les mesures des émissions conduites et rayonnées sont effectuées avec toutes les sources rayonnantes qui sont à employer électroluminescente. En aucun cas, les émissions mesurées du système composite peuvent dépasser le plus haut niveau autorisé pour un composant individuel. L'intégrateur OEM doit démontrer que le produit hôte final est conforme à tous les émetteurs fonctionnant simultanément, le cas échéant.  The following regulatory and safety notices must be published in documentation supplied to the end user of the product or system incorporating an adapter in compliance with local regulations. • Host system including DE910 must be labeled with “Contains transmitter module with  FCC ID: RI7DE910-DUAL and IC ID: 5131A-DE910DUAL” Les notices de normalisation et de sécurité doivent se trouver dans la documentation fournie à l'utilisateur du produit ou du système incorporant un adaptateur conforme aux règlementations locales. • Le système hôte comprenant DE910 doit être marqué avec « Contient un module émetteur avec IDENTIFICATION FCC : RI7DE910-DUAL et identification IC : 5131A-DE910DUAL »
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 76 of 77 17. Safety Recommendations                            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’s  regulations  and  the  specific environmental regulation. Do  not  disassemble  the  product;  any  evidence  of  tampering  will  compromise  the  warranty validity.    Follow  the  instructions  of  the  hardware  user  guides  for  a  correct  wiring  of  the product. The product has to be supplied with a stabilized voltage source and the wiring has to conform to the  security and fire prevention regulations. The product  has to be  handled with care,  avoiding  any  contact  with  the  pads  because  electrostatic  discharges  may  damage  the product itself.  The  system  integrator is responsible  for  the  functioning of the final product;  therefore,  care has  to  be  taken  with  the  external  components  of  the  module  as  well  as  of  any  project  or installation issue because of the risk of disturbing the CDMA network or external devices or having  impact  on  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 SAR regulations.
     DE910 Series Hardware User Guide 1vv0300951 Rev.9 – 2015-05-11 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.                                                                          Page 77 of 77 18. Document History  Revision Date Changes 0 2011-12-09 Release for Beta samples  1 2012-03-07 Release for Verizon 2 2012-07-03 Verizon TA update 8.2. Modem Serial Port2 12.2. Module Finishing & Dimensions 3 2012-12-20 3.1. Pin-out : Auxiliary UART and RUIM IF 3.1.1. LGA Pads Layout 5.1. Power Supply Requirements 8.1.  Modem Serial Port1  14.1 Download and Debug Port 4 2013-04-08 3. DE910 Module Connections 3.1. Pin-Out 5.1. Power Supply Requirements  8.1. Modem Serial Port1 5 2013-04-16 12.4. Stencil 6 2013-06-03 2.2. Product Specifications 7 2013-11-26 2.2. Product Specifications  4.2. Turning off the DE910 module 5.2.6. Power Supply PCB layout Guidelines 6.3.3. The Design Considerations to enhanced GNSS performance 12.7.1. Solder Reflow 13. Packing System 8 2014-11-12 3. DE910 module connections 6.1.2. PCB Guidelines in case of FCC certification 10.6. RTC Bypass Output 9 2015-05-11 16. Conformity Assessment Issues

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