Telit Wireless Solutions LE910C1-NA Hardware User's Manual
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Telit Wireless Solutions LE910C1-NA Hardware User's Manual

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LE910Cx
Hardware User Guide
1VV0301298 Rev. 1.04 - 2017-05-25

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Summary of Contents for Telit Wireless Solutions LE910C1-NA

  • Page 1 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25...
  • Page 2 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 4.2. Recommended Operating Conditions ............. 43 4.3. Logic Level Specifications ................. 44 4.3.1. 1.8V Pads - Absolute Maximum Ratings ..........44 4.3.2. 1.8V Standard GPIOs ................44 4.3.3. 1.8V SD Card Pads ................. 45 4.3.4.
  • Page 7 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 7.5. GNSS Antenna Requirements ................64 7.5.1. Combined GNSS Antenna ..............64 7.5.2. Linear and Patch GNSS Antenna ............64 7.5.3. Front End Design Considerations ............64 7.5.4. GNSS Antenna – PCB Line Guidelines ........... 65 7.5.5.
  • Page 8 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 9.2. Indication of Software Ready ................90 9.3. RTC – Real Time Clock ..................90 9.4. VAUX Power Output ..................90 9.5. ADC Converter ....................91 9.5.1. Description.................... 91 9.5.2. Using the ADC Converter ..............91 9.6.
  • Page 9 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Safety Recommendations ................111 Conformity assessment issues ................. 112 14.1. FCC/ISED Regulatory notices ................ 112 Document History ................... 115 Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 9 of 116...
  • Page 10 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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: LE910Cx Pin-out ........................
  • Page 11 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Table 40: EMC Recommendations ....................104 Table 41: Document Revision History .................... 115 Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved Telit Confidential Information, provided under NDA Page 11 of 116...
  • Page 12 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 List of Figures Figure 1: LE910Cx Block Diagram ..................... 21 Figure 2: LGA Pads Layout ........................ 41 Figure 3: LE910Cx vs. LE910 Pin-out Comparison (top view) ............42 Figure 4: Power-on Circuit ........................ 48 Figure 5: LE910Cx Initialization and Activation ................

  • Page 13: Introduction

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Introduction 1.1. Scope This document introduces the Telit LE910Cx module and presents possible and recommended hardware solutions for developing a product based on the LE910Cx module. All the features and solutions detailed in this document are applicable to all LE910Cx variants, where “LE910Cx” refers to the variants listed in the applicability table.

  • Page 14: Text Conventions

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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: LE910Cx Interface Board HW User Guide 1VV0301323 Ref 4: LE910/LE920 Digital Voice Interface Application Note 80000NT11246A...

  • Page 16: Abbreviations

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 General Product Description 2.1. Overview LE910Cx is Telit’s new LTE series for IoT applications. In its most basic use case, LE910Cx 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

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 2.3. General Functionality and Main Features The LE910Cx 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: Function Features...
  • Page 19 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 2.4. Block Diagram Figure 1 shows an overview of the internal architecture of the LE910Cx module. It includes the following sub-functions: Application processor, Modem subsystem and Location processing with their external •...

  • Page 22: Environmental Requirements

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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

    Table 3: RF Bands per Regional Variant Region LTE FDD LTE TDD HSPA+ Variant SCDMA LE910C1-NA 2, 4, 12 1, 2, 4, 5, 8 2, 3, 5, 8 LE910C1-NS 2, 4, 5, 12, 25, 26 LE910C1-AP 1, 3, 5, 8, 28 1, 5, 8 Reproduction forbidden without written authorization by Telit Communications S.p.A.

  • Page 24: Reference Table Of Rf Bands Characteristics

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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: Sensitivity

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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: Le910Cx Mechanical Specifications

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 2.8. LE910Cx Mechanical Specifications 2.8.1. Dimensions The LE910Cx 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 •...

  • Page 28: Le910Cx Module Connections

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 LE910Cx Module Connections 3.1. Pin-out Table 5: LE910Cx 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 2.5V –...
  • Page 29 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 30 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 31 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 32 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 33 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 34 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 34 of 116...
  • Page 35 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 36 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 37 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 38 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 39: Le910Cx - Signals That Must Be Connected

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 3.2. LE910Cx - Signals That Must Be Connected Table 6 specifies the LE910Cx signals that must be connected even if not used by end application: Table 6: Mandatory Signals Signal Notes VBATT &...
  • Page 40 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 41: Lga Pads Layout

    ADC_IN1 SIMCLK2 SIMRST2 ANT_DIV ANT_MAIN VBATT VBATT_PA VBATT_PA SIMIO2 SIMVCC2 VBATT VBATT_PA VBATT_PA SIMVCC SIMIN SGMII_RX_P SGMII_RX_M SIMIN2 ADC_IN2 SIMIO SGMII_TX_P SIMCLK DVI_RX SGMII_TX_M SIMRST DVI_TX ADC_IN3 GPS_LNA_EN DVI_CLK GPIO_01 WCI_TXD_TGPIO24 DVI_WA0 GPIO_02 WCI_RXD_TGPIO25 GPS_SYNC ANT_GPS I2C_SDA GPIO_03 RFCLK2_QCA HSIC_STB I2C_SCL GPIO_04 WLAN_SLEEP_CLK...

  • Page 42: Backward Compatibility To Xe910 Family

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 3.4. Backward Compatibility to xE910 Family The LE910Cx is a new series in the xE910 form factor The LE910Cx is fully backward compatible to the previous xE910 in terms of: Mechanical dimensions •...

  • Page 43: Electrical Specifications

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Electrical Specifications 4.1. Absolute Maximum Ratings – Not Operational A deviation from the value ranges listed below may harm the LE910Cx module. Table 7: Absolute Maximum Ratings – Not Operational Symbol Parameter Unit VBATT...

  • Page 44: Logic Level Specifications

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 4.3. Logic Level Specifications Unless otherwise specified, all the interface circuits of the LE910Cx 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 LE910Cx interface circuits.

  • Page 45: 1.8V Sd Card Pads

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 46: Dual Voltage Pads - Absolute Maximum Ratings

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 47: Sim Card Pads @2.95V

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 48: Hardware Commands

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Hardware Commands 5.1. Turning on the LE910Cx Module To turn on the LE910Cx 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 49: Figure 5: Le910Cx Initialization And Activation

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Figure 5: LE910Cx 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 50: Turning Off The Le910Cx Module

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 5.3. Turning OFF the LE910Cx 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 •...

  • Page 51: Hardware Shutdown

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx module, the ON/OFF# pad must be asserted low for at least 2.5 seconds and then released.

  • Page 52: Unconditional Hardware Shutdown

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 5.3.4. Unconditional Hardware Shutdown To unconditionally shut down the LE910Cx 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 53: Power Supply

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 54 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Mode Average [Typical] Mode Description 3) Operative Mode (LTE) 190mA LTE CAT 4 channel BW 20 MHz, RB=1, Tx = 0 dBm LTE (0 dBm) (Test case: BAND 1, Channel 300) 500mA LTE CAT 4 channel BW 20 MHz, RB=1, Tx = 22 dBm LTE (22 dBm)

  • Page 55: General Design Rules

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 56: Input Source Power Supply - Design Guidelines

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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. Due to the big difference between the •...

  • Page 57: Figure 11: Example Of Switching Regulator With 12V Input - Part 1

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 58: Battery Source Power Supply - Design Guidelines

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx module.

  • Page 59: Thermal Design Guidelines

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx as •...

  • Page 60: Power Supply Pcb Layout Guidelines

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 61: Antenna(S)

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 62: Gsm/Wcdma/Lte Antenna - Pcb Line Guidelines

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 63: Gsm/Wcdma/Lte Antenna - Installation Guidelines

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 64: Gnss Antenna Requirements

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 7.5. GNSS Antenna Requirements LE910Cx supports an active antenna. It is recommended to use antennas as follow: An external active antenna (GPS only) • An external active antenna plus GNSS pre-filter •...

  • Page 65: Gnss Antenna - Pcb Line Guidelines

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx 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 66: Gnss Antenna - Installation Guidelines

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 7.5.5. GNSS Antenna – Installation Guidelines The LE910Cx, 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.) The antenna must not be co-located or operating in conjunction with any other antenna or •...

  • Page 67: Hardware Interfaces

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Hardware Interfaces Table 22 summarizes all the hardware interfaces of the LE910Cx module. Table 22: LE910Cx Hardware Interfaces Interface LE910Cx 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, OTG support...

  • Page 68: Usb Port

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 8.1. USB Port The LE910Cx 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 69: Hsic Interface

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 •...

  • Page 70: Serial Ports

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 8.4. Serial Ports The serial port is typically a secondary interface between the LE910Cx module and OEM hardware. Two serial ports are available on the module: MODEM SERIAL PORT 1(Main) • MODEM SERIAL PORT 2 (Auxiliary) •...

  • Page 71: Modem Serial Port 1 Signals

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 8.4.1. Modem Serial Port 1 Signals Serial Port 1 on LE910Cx 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 LE910Cx Serial Port 1.

  • Page 72: Modem Serial Port 2

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx 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 LE910Cx serial port and vice versa for Rx.

  • Page 73: Rs232 Level Translation

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 8.4.3. RS232 Level Translation To interface the LE910Cx 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 74: Figure 14: Rs232 Serial Port Lines Connection Layout

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 75: Peripheral Ports

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 8.5. Peripheral Ports In addition to the LE910Cx serial ports, the LE910Cx supports the following peripheral ports: SPI – Serial Peripheral Interface • I2C - Inter-integrated circuit • SD/MMC Card Interface •...

  • Page 76: I2C - Inter-Integrated Circuit

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 8.5.2. I2C - Inter-integrated Circuit The LE910Cx 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 77: Table 27: Sd Card Signals

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Table 28 lists the LE910Cx 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 78: Wifi Sdio Interface

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx 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 79 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 79 of 116...

  • Page 80: Audio Interface

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 8.6. Audio Interface The LE910Cx module support digital audio interface. 8.6.1. Digital Audio The LE910Cx 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 81: Short Frame Timing Diagrams

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 81 of 116...

  • Page 82: Table 30: Pcm_Codec Timing Parameters

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 82 of 116...

  • Page 83: Long Frame Timing Diagrams

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 83 of 116...

  • Page 84: Table 31: Aux_Pcm_Codec Timing Parameters

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 84 of 116...

  • Page 85: General Purpose I/O

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 86 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 87: Using A Gpio Pad As Input

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 88: Figure 19: Gpio Output Pad Equivalent Circuit

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 88 of 116...

  • Page 89: Miscellaneous Functions

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx modules, the STAT_LED usually needs an external transistor to drive an external LED. The STAT_LED does not have a dedicated pin.

  • Page 90: Indication Of Software Ready

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 LE910Cx has not yet finished booting Once the SW_RDY is asserted high, it indicates that the LE910Cx 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 91: Adc Converter

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 9.5. ADC Converter 9.5.1. Description The LE910Cx 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 92: Gnss Characteristics

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 93: Mounting The Module On Your Board

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Mounting the Module on your Board 10.1. General The LE910Cx 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 LE910Cx module. Figure 21: LE910Cx Mechanical Dimensions (bottom view) 4 x Route Inhibit...

  • Page 94: Figure 22: Le910Cx Mechanical Dimensions (Top View)

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Figure 22: LE910Cx 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 94 of 116...

  • Page 95: Figure 23: Le910Cx Mechanical Dimensions (Side View)

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Figure 23: LE910Cx 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 95 of 116...

  • Page 96: Recommended Footprint For The Application

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Recommended Footprint for the Application 10.3. Figure 24 shows the recommended footprint for the application board (dimensions are in mm). To facilitate replacing the LE910Cx module if necessary, it is suggested to design the application with a 1.5 mm placement inhibit area around the module.

  • Page 97: Stencil

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 98: Recommendations For Pcb Pad Dimensions (Mm)

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Recommendations for PCB Pad Dimensions (mm) 10.6. 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 99: Solder Paste

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Solder Paste 10.7. 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 100: Table 38: Solder Profile Characteristics

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 101: Application Guide

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Application Guide 11.1. Debug of the LE910Cx Module in Production To test and debug the mounting of the LE910Cx module, we strongly recommend to add several test pads on the host PCB for the following purposes: Checking the connection between the LE910Cx itself and the application •...

  • Page 102: Bypass Capacitor On Power Supplies

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Bypass Capacitor on Power Supplies 11.2. 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 103: Sim Interface

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 SIM Interface 11.3. This section presents the recommended schematics for the design of SIM interfaces on the application boards. The LE910Cx 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 104: Emc Recommendations

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 EMC Recommendations 11.4. All LE910Cx 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 105: Download And Debug Port

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Download and Debug Port 11.5. Chose one of the following options in the design of host system to download or upgrade the Telit software and debug the LE910Cx module when it is already mounted on a host system. UART and USB interfaces •...

  • Page 106: Packing System

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Packing System 12.1. Packing system – Tray The LE910Cx 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 107: Figure 30: Tray Drawing

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 107 of 116...

  • Page 108: Tape & Reel

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Tape & Reel 12.2. The LE910Cx 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 109: Figure 33: Reel Detail

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 109 of 116...

  • Page 110: Moisture Sensitivity

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Figure 34: Reel Box Detail 12.3. Moisture Sensitivity The LE910Cx 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 111: Safety Recommendations

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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: Where it can interfere with other electronic devices in environments such as hospitals, •...

  • Page 112: Conformity Assessment Issues

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 113 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 Frequency Band Freq [MHz] LE910C1 NA Gain LE910C1 NS Gain [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 114 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 115: Document History

    LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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 116 LE910Cx Hardware User Guide 1VV0301298 Rev. 1.04 - 2017-05-25 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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