Telit Wireless Solutions LE910C1 Series Hardware User's Manual
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Telit Wireless Solutions LE910C1 Series Hardware User's Manual

Telit Wireless Solutions LE910C1 Series Hardware User's Manual

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LE910C1
Hardware User Guide
1VV0301298 Rev. 1.08 - 2017-11-14

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  • Page 1 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14...
  • Page 2 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Applicability Table This documentation applies to the following products: Table 1: Applicability Table Module Name Description LE910C1-NA North America – AT&T with global roaming LE910C1-NS North America - Sprint variant LE910C1-AP APAC variant Reproduction forbidden without written authorization by Telit Communications S.p.A.
  • Page 3 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 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.
  • Page 4 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Usage and Disclosure Restrictions License Agreements The software described in this document is the property of Telit and its licensors. It is furnished by an express license agreement only and may be used only in accordance with the terms of such an agreement.

  • Page 5: Table Of Contents

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Contents Introduction ..................... 13 1.1. Scope ........................ 13 1.2. Audience ......................13 1.3. Contact Information, Support ................13 1.4. Text Conventions ..................... 14 1.5. Related Documents ..................15 1.6. Abbreviations ....................16 General Product Description ................
  • Page 6 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Electrical Specifications ..................44 4.1. Absolute Maximum Ratings – Not Operational ..........44 4.2. Recommended Operating Conditions ............. 44 4.3. Logic Level Specifications ................. 45 4.3.1. 1.8V Pads - Absolute Maximum Ratings ..........45 4.3.2.
  • Page 7 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 7.3. GSM/WCDMA/LTE Antenna – Installation Guidelines ........66 7.4. Antenna Diversity Requirements ..............66 7.5. GNSS Antenna Requirements ................67 7.5.1. Combined GNSS Antenna ..............67 7.5.2. Linear and Patch GNSS Antenna ............67 7.5.3.
  • Page 8 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Miscellaneous Functions .................. 92 9.1. Indication of Network Service Availability ............92 9.2. Indication of Software Ready ................93 9.3. RTC – Real Time Clock ..................93 9.4. VAUX Power Output ..................93 9.5.
  • Page 9 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 12.2. Tape & Reel ....................111 12.3. Moisture Sensitivity ..................113 Safety Recommendations ................114 Conformity assessment issues ................. 115 14.1. FCC/ISED Regulatory notices ................. 115 Document History ................... 118 Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 9 of 119...
  • Page 10 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 List of Tables Table 1: Applicability Table ......................... 2 Table 2: Related Documents ......................15 Table 3: RF Bands per Regional Variant .................... 23 Table 4: RF Bands Characteristics ..................... 24 Table 5: LE910C1 Pin-out ........................
  • Page 11 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Table 41: EMC Recommendations ....................107 Table 42: Document Revision History .................... 118 Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 11 of 119...
  • Page 12 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 List of Figures Figure 1: LE910C1 Block Diagram ..................... 21 Figure 2: LGA Pads Layout ........................ 42 Figure 3: LE910C1 vs. LE910 Pin-out Comparison (top view) ............43 Figure 4: Power-on Circuit ........................ 49 Figure 5: LE910C1 Initialization and Activation ................

  • Page 13: Introduction

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Introduction 1.1. Scope This document introduces the Telit LE910C1C1 module and presents possible and recommended hardware solutions for developing a product based on the LE910C1C1 module. All the features and solutions detailed in this document are applicable to all LE910C1C1 variants, where “LE910C1C1”...

  • Page 14: Text Conventions

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Alternatively, use: http://www.telit.com/en/products/technical-support-center/contact.php For detailed information about where you can buy the Telit modules or for recommendations on accessories and components, visit: http://www.telit.com To register for product news and announcements or for product questions contact Telit’s Technical Support Center (TTSC).

  • Page 15: Related Documents

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 1.5. Related Documents Table 2: Related Documents Document Title Document Number Ref 1: LE9x0 AT Command User Guide 80407ST10116A Ref 2: Telit EVB HW User Guide 1VV0301249 Ref 3: LE910C1 Interface Board HW User Guide 1VV0301323 Ref 4: LE910/LE920 Digital Voice Interface Application Note 80000NT11246A...

  • Page 16: Abbreviations

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 1.6. Abbreviations Term Definition Analog-to-digital converter Application-enabled Digital-to-analog converter Data Terminal Equipment Frequency division duplex GLONASS Global orbiting navigation satellite system GNSS Global navigation satellite system GPIO General-purpose input/output GPRS General packet radio services Global positioning system Global system for mobile communications HSIC...

  • Page 17: General Product Description

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 General Product Description 2.1. Overview LE910C1 is Telit’s new LTE series for IoT applications. In its most basic use case, LE910C1 can be applied as a wireless communication front-end for telematics products, offering GNSS and mobile communication features to an external host CPU through its rich interfaces.

  • Page 18: General Functionality And Main Features

    1VV0301298 Rev. 1.08 - 2017-11-14 2.3. General Functionality and Main Features The LE910C1 series of cellular modules features LTE and multi-RAT modem together with an on- chip powerful application processor and a rich set of interfaces. The major functions and features are listed below:...
  • Page 19 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Function Features Interfaces Rich set of interfaces, including: • SD/MMC Card Interface supporting SD3.0 standard • SDIO for external WiFi transceiver supporting SDIO3.0 standard • SGMII for external Ethernet transceiver (optional) o Compliant with IEEE802.3 o Full duplex operation at 1 Gbps o Half/full duplex operation at 10/100 Mbps...
  • Page 20 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Function Features Form factor Form factor (28x28mm), accommodating the multiple RF bands in each region variant Environment and The entire module is designed and qualified by Telit for satisfying the quality environment and quality requirements.

  • Page 21: Block Diagram

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 2.4. Block Diagram Figure 1 shows an overview of the internal architecture of the LE910C1 module. It includes the following sub-functions: • Application processor, Modem subsystem and Location processing with their external interfaces.

  • Page 22: Environmental Requirements

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 2.5. Environmental Requirements 2.5.1. Temperature Range Operating -20 ~ +55°C. temperature range This range is defined by 3GPP (the global standard for wireless mobile communication). Telit guarantees its modules to comply with all the 3GPP requirements and to have full functionality of the module with in this range.

  • Page 23: Frequency Bands

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 2.6. Frequency Bands The operating frequencies in GSM850, EGSM900, DCS1800, PCS1900, WCDMA & LTE modes conform to the 3GPP specifications. 2.6.1. RF Bands per Regional Variant Table 3 summarizes all region variants within the LE910C1 family, showing the supported band sets in each variant.

  • Page 24: Reference Table Of Rf Bands Characteristics

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 2.6.2. Reference Table of RF Bands Characteristics Table 4: RF Bands Characteristics Mode Freq. Tx (MHz) Freq. Rx (MHz) Channels Tx-Rx Offset PCS 1900 1850.2 ~ 1909.8 1930.2 ~ 1989.8 512 ~ 810 80 MHz DCS 1800 1710 ~ 1785...
  • Page 25 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Mode Freq. Tx (MHz) Freq. Rx (MHz) Channels Tx-Rx Offset TDSCDMA 1900 – 1880 ~ 1920 1880 ~ 1920 Tx: 9404 ~ 9596 0 MHz Rx: 9404 ~ 9596 LTE 2100 – B1 1920 ~ 1980 2110 ~ 2170 Tx: 18000 ~ 18599...
  • Page 26 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Mode Freq. Tx (MHz) Freq. Rx (MHz) Channels Tx-Rx Offset LTE 800 – B19 830 ~ 845 875 ~ 890 Tx: 24000 ~ 24149 45 MHz Rx: 6000 ~ 6149 LTE 800 – B20 832 ~ 862 791 ~ 821 Tx: 24150 ~ 24449...

  • Page 27: Rf Parameters

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 2.7. RF parameters 2.7.1. Sensitivity LE910C1 typical sensitivity levels are as follow: • -108 dBm @ 2G • -113.5 dBm @ 3G • -103 dBm @ 4G FDD (BW=5 MHz) 2.7.2. Output power LE910Cx typical values for Max output level are as follow: •...

  • Page 28: Le910C1 Mechanical Specifications

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 2.8. LE910C1 Mechanical Specifications 2.8.1. Dimensions The LE910C1 module’s overall dimensions are: • Length: 28.2 mm, +/- 0.15 mm Tolerance • Width: 28.2 mm, +/- 0.15 mm Tolerance • Thickness: 2.2 mm, +/- 0.22 mm Tolerance NOTE: Consider a typical label thickness of 0.1 mm in addition to the module thickness.

  • Page 29: Le910C1 Module Connections

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 LE910C1 Module Connections 3.1. Pin-out Table 5: LE910C1 Pin-out Signal Function Type Comment USB HS 2.0 Communication Port USB_D+ USB differential Data(+) USB_D- USB differential Data(-) USB_VBUS Power sense for the internal USB Power transceiver USB_ID...
  • Page 30 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 SPI – Serial Peripheral Interface / AUX UART SPI_CLK SPI Clock output 1.8V SPI_MISO/ RX_AUX SPI data Master Input Slave output / 1.8V RX_AUX SPI_MOSI/TX_AUX SPI data Master Output Slave input/ 1.8V TX_AUX SPI_CS/GPIO11...
  • Page 31 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 WiFi (SDIO) Interface WiFi_SD_CMD Wi-Fi SD Command 1.8V WiFi_SD_CLK Wi-Fi SD Clock 1.8V WiFi_SD_DATA0 Wi-Fi SD Serial Data 0 1.8V WiFi_SD_DATA1 Wi-Fi SD Serial Data 1 1.8V WiFi_SD_DATA2 Wi-Fi SD Serial Data 2 1.8V WiFi_SD_DATA3 Wi-Fi SD Serial Data 3...
  • Page 32 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 SIM Card Interface 2 SIMCLK2 External SIM 2 signal – Clock 1.8/2.85V SIMRST2 External SIM 2 signal – Reset 1.8/2.85V SIMIO2 External SIM 2 signal – Data I/O 1.8/2.85V Internally PU 20kΩ...
  • Page 33 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 RF Section Antenna GSM/EDGE/UMTS/LTE Main antenna (50 Ohm) ANT_DIV UMTS/LTE antenna diversity input (50 Ohm) GPS Section ANT_GPS GPS antenna (50 Ohm) GPS_LNA_EN Enables the external regulator for GPS LNA 1.8V GPS_SYNC GPS sync signal for Dead Reckoning 1.8V...
  • Page 34 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 I2C Interface I2C_SCL I2C clock 1.8V Internally PU 2.2kΩ to 1.8V I2C_SDA I2C Data 1.8V Internally PU 2.2kΩ to 1.8V Power Supply VBATT Main Power Supply (Digital Section) Power VBATT Main Power Supply (Digital Section) Power VBATT_PA Main Power Supply (RF Section)
  • Page 35 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 35 of 119...
  • Page 36 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Ground Ground Ground Ground Ground Ground Ground Ground Ground Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved...
  • Page 37 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved...
  • Page 38 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved for future use Reserved for future use. Not connected Can be tied to internally Reproduction forbidden without written authorization by Telit Communications S.p.A.
  • Page 39 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Caution: GPIO_09 and WCI_RX are used as special HW flags during boot. If they are used as GPIOs, they must be connected via a 3-state buffer to avoid any undesirable effect during the boot. NOTE: When the UART signals are used as the communication port between the Host and the Modem, RTS must be connected to GND (on the module side) if flow control is not used.

  • Page 40: Le910C1 - Signals That Must Be Connected

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 3.2. LE910C1 - Signals That Must Be Connected Table 6 specifies the LE910C1 signals that must be connected even if not used by end application: Table 6: Mandatory Signals Signal Notes VBATT &...
  • Page 41 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Signal Notes ANT_GPS GPS antenna C4, C5, C6, C7, D3, E3, G3, K4, L4, P11 Reserved Connect to a Test Point for Telit internal GPIO_09 If not used, connect to a Test Point WCI_RX If not used, connect to a Test Point Reproduction forbidden without written authorization by Telit Communications S.p.A.

  • Page 42: Lga Pads Layout

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 3.3. LGA Pads Layout Figure 2: LGA Pads Layout Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 42 of 119...

  • Page 43: Backward Compatibility To Xe910 Family

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 3.4. Backward Compatibility to xE910 Family The LE910C1 is a new series in the xE910 form factor The LE910C1 is fully backward compatible to the previous xE910 in terms of: • Mechanical dimensions •...

  • Page 44: Electrical Specifications

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Electrical Specifications 4.1. Absolute Maximum Ratings – Not Operational A deviation from the value ranges listed below may harm the LE910C1 module. Table 7: Absolute Maximum Ratings – Not Operational Symbol Parameter Unit VBATT...

  • Page 45: Logic Level Specifications

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 4.3. Logic Level Specifications Unless otherwise specified, all the interface circuits of the LE910C1 are 1.8V CMOS logic. Only few specific interfaces (such as USIM and SD Card) are capable of dual voltage I/O. The following tables show the logic level specifications used in the LE910C1 interface circuits.

  • Page 46: 1.8V Sd Card Pads

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Parameter Unit Comment Pull-down resistance [kΩ] Input capacitance [pF] NOTE: Pull-Up and Pull-Down resistance of GPIO3, GPIO7 and GPIO8 is different than above mentioned GPIO3 pull resistance is specified as 10KΩ to 50KΩ 4.3.3.

  • Page 47: Dual Voltage Pads - Absolute Maximum Ratings

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Parameter Unit Comment Output low level 0.4V Low-level input leakage current [uA] No pull-up High-level input leakage current [uA] No pull-down Pull-up resistance [kΩ] Pull-down resistance [kΩ] Input capacitance [pF] 4.3.5. Dual Voltage Pads - Absolute Maximum Ratings Table 13: Absolute Maximum Ratings - Not Functional Parameter...

  • Page 48: Sim Card Pads @2.95V

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Parameter Unit Comments Pull-down resistance [kΩ] Input capacitance [pF] 4.3.7. SIM Card Pads @2.95V Table 15: Operating Range – For SIM Pads Operating at 2.95V Parameter Unit Comment Input high level 2.1V 3.1V Input low level...

  • Page 49: Hardware Commands

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Hardware Commands 5.1. Turning on the LE910C1 Module To turn on the LE910C1 module, the ON/OFF# pad must be asserted 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. This pin is internally pulled up;...

  • Page 50: Figure 5: Le910C1 Initialization And Activation

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Figure 5: LE910C1 Initialization and Activation VBATT 1 Sec < T_Hold < 2 Sec ON_OFF T_RDY < 20 Sec SW_RDY OK to Send AT commands 18 Sec < T_PWRMON < 20 Sec V_AUX All interfaces and pins PWRMON...
  • Page 51 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 NOTE: Active low signals are labeled with a name that ends with "#" or with “_N” NOTE: 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.

  • Page 52: Turning Off The Le910C1 Module

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 5.3. Turning OFF the LE910C1 Module Turning OFF the device can be done in four different ways: • AT#SHDN software command • Hardware shutdown using ON/OFF# pad • Hardware Unconditional Shutdown using the HW_SHUTDOWN_N When the device is shut down by a software command or a hardware shutdown, it issues a detach request to the network, informing the network that the device will not be reachable any more.

  • Page 53: Hardware Shutdown

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 NOTE: To check whether the device has powered OFF, monitor the PWRMON hardware line. When PWRMON goes low, the device has powered OFF. 5.3.2. Hardware Shutdown To turn off LE910C1 module, the ON/OFF# pad must be asserted low for at least 2.5 seconds and then released.

  • Page 54: Unconditional Hardware Shutdown

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 5.3.4. Unconditional Hardware Shutdown To unconditionally shut down the LE910C1 module, the HW_SHUTDOWN_N pad must be tied low for at least 200 milliseconds and then released. A simple circuit for applying unconditional shutdown is shown below: Figure 8: Circuit for Unconditional Hardware Shutdown The system power down timing for using HW_SHUTDOWN_N is shown below Figure 9 Power down timing using HW_SHUTDOWN_N...

  • Page 55: Power Supply

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Power Supply The power supply circuitry and board layout are very important parts of the full product design, with critical impact on the overall product performance. Read the following requirements and guidelines carefully to ensure a good and proper design.
  • Page 56 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Mode Average [Typical] Mode Description 3) Operative Mode (LTE) LTE CAT 1channel BW 5 MHz, RB=1, Tx = 0 dBm LTE (0 dBm) 180mA (Test case: BAND 1, Channel 300) LTE CAT 1 channel BW 10 MHz, RB=1, Tx = 0 dBm LTE (0 dBm) 190mA (Test case: BAND 1, Channel 300)
  • Page 57 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 If the layout of the PCB is not well designed, a strong noise floor is generated on the ground. This will reflect on all the audio paths producing an audible annoying noise at 216 Hz. If the voltage drops during the peaks, current absorption is too high.

  • Page 58: General Design Rules

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 6.2. General Design Rules The principal guidelines for the Power Supply Design embrace three different design steps: • Electrical design • Thermal design • PCB layout 6.2.1. Electrical Design Guidelines The electrical design of the power supply depends strongly on the power source where this power is drained.

  • Page 59: Input Source Power Supply - Design Guidelines

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Figure 10 shows an example of linear regulator with 5V input. Figure 10: Example of Linear Regulator with 5V Input 6.2.1.2. + 12V Input Source Power Supply – Design Guidelines • The desired output for the power supply is 3.8V.

  • Page 60: Figure 11: Example Of Switching Regulator With 12V Input - Part 1

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Figure 11 and Figure 12 show an example of switching regulator with 12V input. Figure 11: Example of Switching Regulator with 12V Input – Part 1 Figure 12: Example of Switching Regulator with 12V Input – Part 2 Reproduction forbidden without written authorization by Telit Communications S.p.A.

  • Page 61: Battery Source Power Supply - Design Guidelines

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 6.2.1.3. Battery Source Power Supply – Design Guidelines • The desired nominal output for the power supply is 3.8V, and the maximum allowed voltage is 4.2V. Hence, a single 3.7V Li-Ion cell battery type is suitable for supplying the power to the LE910C1 module.

  • Page 62: Thermal Design Guidelines

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 6.2.2. Thermal Design Guidelines The thermal design for the power supply heat sink must be done with the following specifications: • Average current consumption during RF transmission @PWR level max in LE910C1 as shown in Table 17 Average current consumption during Class12 GPRS transmission @PWR level max as shown •...

  • Page 63: Power Supply Pcb Layout Guidelines

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 6.2.3. 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.

  • Page 64: Antenna(S)

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Antenna(s) Antenna connection and board layout design are the most important parts in the full product design, and they have a strong influence on the product’s overall performance. Read carefully and follow the requirements and guidelines for a good and proper design.

  • Page 65: Gsm/Wcdma/Lte Antenna - Pcb Line Guidelines

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Furthermore, if the device is developed for the US and/or Canada market, it must comply with the FCC and/or IC approval requirements. NOTE: 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.

  • Page 66: Gsm/Wcdma/Lte Antenna - Installation Guidelines

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 • If EM-noisy devices are not present around the line, geometries like Micro strip or Grounded Coplanar Waveguide are preferred because they typically ensure less attenuation compared to a Strip line having the same length. 7.3.

  • Page 67: Gnss Antenna Requirements

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 7.5. GNSS Antenna Requirements LE910C1 supports an active antenna. It is recommended to use antennas as follow: • An external active antenna (17dB typ. Gain, GPS only) • An external active antenna plus GNSS pre-filter (17dB typ. Gain) NOTE: The external GNSS pre-filter is required for the GLONASS application.

  • Page 68: Gnss Antenna - Pcb Line Guidelines

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 This line of transmission must meet the following requirements: Table 21: Antenna Line on PCB Requirements Characteristic impedance 50 Ohm Max attenuation 0.3 dB Avoid coupling with other signals. Cold End (Ground Plane) of the antenna must be equipotential to the LE910C1 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.

  • Page 69: Gnss Antenna - Installation Guidelines

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 7.5.5. GNSS Antenna – Installation Guidelines • The LE910C1, due to its sensitivity characteristics, is capable of performing a fix inside buildings. (In any case, the sensitivity could be affected by the building characteristics i.e. shielding.) •...

  • Page 70: Hardware Interfaces

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Hardware Interfaces Table 22 summarizes all the hardware interfaces of the LE910C1 module. Table 22: LE910C1 Hardware Interfaces Interface LE910C1 SGMII For Ethernet support HSIC SD/MMC x1 dual voltage interface for supporting SD/MMC card SDIO For WIFI support (1.8V only) USB2.0, Optional OTG support...

  • Page 71: Usb Port

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.1. USB Port The LE910C1 module includes a Universal Serial Bus (USB) transceiver, which operates at USB high- speed (480 Mbits/sec). It can also operate with USB full-speed hosts (12 Mbits/sec). It is compliant with the USB 2.0 specification and can be used for control and data transfers as well as for diagnostic monitoring and firmware update.

  • Page 72: Hsic Interface

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.2. HSIC Interface The application processor exposes a High-Speed Inter-Chip (HSIC). HSIC eliminates the analog transceiver from a USB interface for lower voltage operation and reduced power dissipation. • High-speed 480 Mbps (240 MHz DDR) USB transfers are 100% host driver compatible with traditional USB cable connected topologies Bidirectional data strobe signal (STROBE) •...

  • Page 73: Serial Ports

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.4. Serial Ports The serial port is typically a secondary interface between the LE910C1 module and OEM hardware. Two serial ports are available on the module: MODEM SERIAL PORT 1(Main) • •...

  • Page 74: Modem Serial Port 1 Signals

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.4.1. Modem Serial Port 1 Signals Serial Port 1 on LE910C1 is a +1.8V UART with 7 RS232 signals. It differs from the PC-RS232 in signal polarity (RS232 is reversed) and levels. Table 25 lists the signals of LE910C1 Serial Port 1.

  • Page 75: Modem Serial Port 2

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 NOTE: For minimum implementations, only the TXD and RXD lines need be connected. The other lines can be left open provided a software flow control is implemented. NOTE: According to V.24, Rx/Tx signal names refer to the application side; therefore, on the LE910C1 side, these signal are in the opposite direction: TXD on the application side will be connected to the receive line (here named TXD/ RX_UART) of the LE910C1 serial port and vice versa for Rx.

  • Page 76: Rs232 Level Translation

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.4.3. RS232 Level Translation To interface the LE910C1 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 •...

  • Page 77: Figure 14: Rs232 Serial Port Lines Connection Layout

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 NOTE: In this case, the length of the lines on the application must be taken into account to avoid problems in the case of High-speed rates on RS232. The RS232 serial port lines are usually connected to a DB9 connector as shown in Figure 14. Signal names and directions are named and defined from the DTE point of view.

  • Page 78: Peripheral Ports

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.5. Peripheral Ports In addition to the LE910C1 serial ports, the LE910C1 supports the following peripheral ports: • SPI – Serial Peripheral Interface • I2C - Inter-integrated circuit • SD/MMC Card Interface SDIO Interface •...

  • Page 79: I2C - Inter-Integrated Circuit

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.5.2. I2C - Inter-integrated Circuit The LE910C1 supports an I2C interface on the following pins: • B11 - I2C_SCL • B10 - I2C_SDA The I2C can also be used externally by the end customer application. In addition, SW emulated I2C functionality can be used on GPIO 1-10 pins.

  • Page 80: Table 28: Sd Card Signals

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Table 28 lists the LE910C1 SD card signals. Table 28: SD Card Signals Signal Function Type Comments SD/MMC_CMD SD command 1.8/2.95V SD/MMC_CLK SD card clock 1.8/2.95V SD/MMC_DATA0 SD Serial Data 0 1.8/2.95V SD/MMC_DATA1 SD Serial Data 1...

  • Page 81: Wifi Sdio Interface

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 NOTE: SD/MMC is supported only on the Linux side. The power supply to the SD/MMC card is to be provided by the Host application board. The LE910C1 does not provide a dedicated power supply for the SD/MMC card. VMMC Supply is limited to 50mA thus can only supply the MMC card external pull-up resistors.
  • Page 82 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 NOTE: It is recommended that WiFi_SDRST be equipped with a pull-up resistor to 1.8V on the host application to disable WiFi reset function if needed. Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 82 of 119...

  • Page 83: Audio Interface

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.6. Audio Interface The LE910C1 module support digital audio interface. 8.6.1. Digital Audio The LE910C1 module can be connected to an external codec through the digital interface. The product provides a single Digital Audio Interface (DVI) on the following pins: Table 30: Digital Audio Interface (DVI) Signals Signal Function...

  • Page 84: Short Frame Timing Diagrams

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.6.1.1. Short Frame Timing Diagrams Figure 17: Primary PCM Timing Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 84 of 119...

  • Page 85: Table 31: Pcm_Codec Timing Parameters

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Table 31: PCM_CODEC Timing Parameters Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 85 of 119...

  • Page 86: Long Frame Timing Diagrams

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.6.1.2. Long Frame Timing Diagrams Figure 18: Auxiliary PCM Timing Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 86 of 119...

  • Page 87: Table 32: Aux_Pcm_Codec Timing Parameters

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Table 32: AUX_PCM_CODEC Timing Parameters Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 87 of 119...

  • Page 88: General Purpose I/O

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 8.7. 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 digital values (high or low) present on the pad at the read time.
  • Page 89 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 The additional GPIOs below can be used in case their initial functionality is not used: Signal Initial Function Alternate Function Type Drive Strength GPIO_13 WIFI_SDRST Configurable GPIO CMOS 1.8V 2-16 mA GPIO_14 WIFI_SDIO_CMD Configurable GPIO...

  • Page 90: Using A Gpio Pad As Input

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 I2C - Inter-integrated Circuit. 8.7.1. Using a GPIO Pad as Input 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.

  • Page 91: Figure 19: Gpio Output Pad Equivalent Circuit

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Figure 19: GPIO Output Pad Equivalent Circuit Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 91 of 119...

  • Page 92: Miscellaneous Functions

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Miscellaneous Functions 9.1. Indication of Network Service Availability The STAT_LED signal shows information on the network service availability and call status. In the LE910C1 modules, the STAT_LED usually needs an external transistor to drive an external LED. The STAT_LED does not have a dedicated pin.

  • Page 93: Indication Of Software Ready

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 9.2. Indication of Software Ready The SW_RDY signal provides indication about the ability of the module to receive commands As long as the SW_RDY is asserted low it indicates that the LE910C1 has not yet finished booting Once the SW_RDY is asserted high, it indicates that the LE910C1 is ready to receive commands The SW_RDY does not have a dedicated pin The SW_RDY functionality is available on GPIO_08 pin (by default GPIO_08 functions as SW_RDY...

  • Page 94: Adc Converter

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 9.5. ADC Converter 9.5.1. Description The LE910C1 module provides three 8-bit Analog to Digital converters. Each ADC reads the voltage level applied on the relevant pin, converts it, and stores it into an 8-bit word. Table 36 shows the ADC characteristics.

  • Page 95: Gnss Characteristics

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 9.7. GNSS Characteristics The table below specifies the GNSS characteristics and expected performance The values are related to typical environment and conditions Table 37 GNSS Characteristics Typical Parameters Notes Measurement Standalone or MS Based -162.3 dBm Tracking Sensitivity Sensitivity...

  • Page 96: Mounting The Module On Your Board

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Mounting the Module on your Board 10.1. General The LE910C1 module was designed to be compliant with a standard lead-free SMT process. 10.2. Finishing & Dimensions Figure 21 shows the mechanical dimensions of the LE910C1 module. Figure 21: LE910C1 Mechanical Dimensions (bottom view) 4 x Route Inhibit...

  • Page 97: Figure 22: Le910C1 Mechanical Dimensions (Top View)

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Figure 22: LE910C1 Mechanical Dimensions (Top view) Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 97 of 119...

  • Page 98: Figure 23: Le910C1 Mechanical Dimensions (Side View)

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Figure 23: LE910C1 Mechanical Dimensions (Side view) Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 98 of 119...

  • Page 99: Recommended Footprint For The Application

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 10.3. Recommended Footprint for the Application Figure 24 shows the recommended footprint for the application board (dimensions are in mm). To facilitate replacing the LE910C1 module if necessary, it is suggested to design the application with a 1.5 mm placement inhibit area around the module.

  • Page 100: Stencil

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 10.4. Stencil Stencil’s apertures layout can be the same as the recommended footprint (1:1). The suggested thickness of stencil foil is greater than 120 µm. 10.5. PCB Pad Design The solder pads on the PCB are recommended to be of the Non Solder Mask Defined (NSMD) type. Figure 25: PCB Pad Design Reproduction forbidden without written authorization by Telit Communications S.p.A.

  • Page 101: Recommendations For Pcb Pad Dimensions (Mm)

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 10.6. Recommendations for PCB Pad Dimensions (mm) Figure 26: PCB Pad Dimensions It is not recommended to place around the pads a via or micro-via that is not covered by solder resist in an area of 0.15 mm unless it carries the same signal as the pad itself.

  • Page 102: Solder Paste

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 10.7. Solder Paste We recommend using only “no clean” solder paste to avoid the cleaning of the modules after assembly. 10.7.1. Solder Reflow Figure 27 shows the recommended solder reflow profile. Figure 27: Solder Reflow Profile Reproduction forbidden without written authorization by Telit Communications S.p.A.

  • Page 103: Table 39: Solder Profile Characteristics

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Table 39: Solder Profile Characteristics Profile Feature Pb-Free Assembly Average ramp-up rate (T to T 3°C/second max Preheat – Temperature min (Tsmin) 150°C – Temperature max (Tsmax) 200°C – Time (min to max) (ts) 60-180 seconds Tsmax to TL –...

  • Page 104: Application Guide

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Application Guide 11.1. Debug of the LE910C1 Module in Production To test and debug the mounting of the LE910C1 module, we strongly recommend to add several test pads on the host PCB for the following purposes: Checking the connection between the LE910C1 itself and the application •...

  • Page 105: Bypass Capacitor On Power Supplies

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 11.2. Bypass Capacitor on Power Supplies When a sudden voltage step is asserted to or a cut from the power supplies, the steep transition causes some reactions such as overshoot and undershoot. This abrupt voltage transition can affect the device causing it to not operate or to malfunction.

  • Page 106: Sim Interface

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 11.3. SIM Interface This section presents the recommended schematics for the design of SIM interfaces on the application boards. The LE910C1 supports two external SIM interfaces. 11.3.1. SIM Schematic Example Figure 28 illustrates in particular how the application side should be designed, and what values the components should have.

  • Page 107: Emc Recommendations

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 11.4. EMC Recommendations All LE910C1 signals are provided with some EMC protection. Nevertheless, the accepted level differs according to the specific pin. Table 41 lists the characteristics. Table 41: EMC Recommendations Signal Function Contact...

  • Page 108: Download And Debug Port

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 11.5. Download and Debug Port Chose one of the following options in the design of host system to download or upgrade the Telit software and debug the LE910C1 module when it is already mounted on a host system. UART and USB interfaces •...

  • Page 109: Packing System

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Packing System 12.1. Packing system – Tray The LE910C1 modules are packaged on trays of 36 pieces each as shown in Figure 29. These trays can be used in SMT processes for pick & place handling. Figure 29: Packing Reproduction forbidden without written authorization by Telit Communications S.p.A.

  • Page 110: Figure 30: Tray Drawing

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Figure 30: Tray Drawing Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 110 of 119...

  • Page 111: Tape & Reel

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 12.2. Tape & Reel The LE910C1 can be packaged on reels of 200 pieces each. See figure for module positioning into the carrier. Figure 31: Module Positioning into the Carrier Figure 32: Carrier Tape Detail Reproduction forbidden without written authorization by Telit Communications S.p.A.

  • Page 112: Figure 33: Reel Detail

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Figure 33: Reel Detail Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 112 of 119...

  • Page 113: Moisture Sensitivity

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Figure 34: Reel Box Detail 12.3. Moisture Sensitivity The LE910C1 module is a Moisture Sensitive Device Level 3, in accordance with standard IPC/JEDEC J-STD-020. Observe all of the requirements for using this kind of components. Reproduction forbidden without written authorization by Telit Communications S.p.A.

  • Page 114: Safety Recommendations

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Safety Recommendations READ CAREFULLY Be sure that the use of this product is allowed in your country and in the environment required. The use of this product may be dangerous and must be avoided in the following areas: •...

  • Page 115: Conformity Assessment Issues

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Conformity assessment issues 14.1. FCC/ISED Regulatory notices Modification statement Telit has not approved any changes or modifications to this device by the user. Any changes or modifications could void the user’s authority to operate the equipment. Telit n’approuve aucune modification apportée à...
  • Page 116 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Frequency LE910C1 NA Gain LE910C1 NS Gain Band Freq [MHz] [dBi] [dBi] 850 MHZ 0.63 6.08 1900 MHZ 1900 2.51 8.01 1700 MHZ 1700 5.00 5.00 900 MHZ 5.00 700 MHZ 5.63 5.63 L'émetteur ne doit pas être colocalisé...
  • Page 117 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 L'appareil hôte doit être étiqueté comme il faut pour permettre l'identification des modules qui s'y trouvent. L'étiquette de certification du module donné doit être posée sur l'appareil hôte à un endroit bien en vue en tout temps. En l'absence d'étiquette, l'appareil hôte doit porter une étiquette donnant le FCC ID et le IC du module, précédé...

  • Page 118: Document History

    LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Document History Table 42: Document Revision History Revision Date Changes 2016-08-30 First Draft 2016-09-05 Minor edits 2016-11-13 Added information for GPIO usage as Interrupt Added clarification for AUX_UART location and backward compatibility 2016-11-30 Updated band support table...
  • Page 119 LE910C1 Hardware User Guide 1VV0301298 Rev. 1.08 - 2017-11-14 Revision Date Changes 1.01 2017-02-16 Adding Section 14: FCC/ISED Regulatory notices Changing Document History section from 14 to 15 1.02 2017-04-03 Section 14.1 – updated column “Band” to “Frequency Band” in Wireless notice table Section 8.4.1 - Added note regarding DTR 1.03...

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