LE910Cx mPCIe HW Design Guide SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE NOTICE While reasonable efforts have been made to assure the accuracy of this document, Telit assumes no liability resulting from any inaccuracies or omissions in this document, or from use of the information obtained herein.
LE910Cx mPCIe HW Design Guide 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.
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LE910Cx mPCIe HW Design Guide 7.3.4.2. Linear and Patch GNSS Antenna ..........61 MECHANICAL DESIGN ............. 62 Mechanical Dimensions .............. 62 8.1.1. Mechanical Drawing ..............62 8.1.2. Top View..................62 8.1.3. Bottom View ................63 8.1.4. Side View..................64 APPLICATION PCB DESIGN ............ 65 Recommended footprint for the application .........
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LE910Cx mPCIe HW Design Guide List of Tables TABLE 1 PRODUCT VARIANTS AND FREQUENCY BANDS ............14 TABLE 2 MAIN FEATURES ......................16 TABLE 3 TX OUTPUT POWER ....................... 17 TABLE 4 RX SENSITIVITY ......................17 TABLE 5 TEMPERATURE RANGE ....................19 TABLE 6 PIN-OUT ..........................
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LE910Cx mPCIe HW Design Guide List of Figures FIGURE 1 LINEAR REGULATOR WITH 5V INPUT ................ 26 FIGURE 2 SWITCHING REGULATOR 12V ..................27 FIGURE 3 POWER SUPPLY RECOMMENDED CIRCUIT ............. 31 FIGURE 4 POWER ON TIMING DIAGRAMM.................. 38 FIGURE 5 RECOMENDED RESET DRIVER CUIRCUIT ..............42 FIGURE 6 SHUTDOWN BY SOFTWARE COMMAND ..............
LE910Cx mPCIe HW Design Guide 1. INTRODUCTION Scope The aim of this document is the description of some hardware solutions useful for developing a product with the Telit xE910Cx Mini PCIe Adapter. Audience This document is intended for Telit customers, especially system integrators, about to implement their applications using the Telit xE910Cx Mini PCIe Adapter.
LE910Cx mPCIe HW Design Guide 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.
LE910Cx mPCIe HW Design Guide 2. GENERAL PRODUCT DESCRIPTION Overview The aim of this document is to present possible and recommended hardware solutions useful for developing a product with the Telit LE910Cx-mPCIe module. LE910Cx-mPCIe is Telit platform for Mini PCIe applications, such as M2M applications, industrial mobile router and table PC, based on the following technologies: •...
LE910Cx mPCIe HW Design Guide Main features Function Features • Modem Multi-RAT cellular modem for voice and data communication • LTE FDD Catx data rates per the module variant used. • Carrier aggregation is not supported • GSM/GPRS/EDGE • WCDMA up to DC HSPA+, Rel.9 •...
LE910Cx mPCIe HW Design Guide Environment and The entire module is designed and qualified by Telit for satisfying quality requirements the environment and quality requirements. Single supply The module generates all its internal supply voltages. module No dedicated RTC supply, RTC is supplied by VBATT Table 2 Main features 1VV0301510 Rev.
LE910Cx mPCIe HW Design Guide Mechanical specifications 2.7.1. Dimensions The overall dimensions of LE910Cx-mPCIe family are: Length: 50.95 mm Width: 30 mm Thickness : 3.2 mm (Version with SIM holder : 4.62 mm) 2.7.2. Weight The nominal weight of the module is 7 grams. 1VV0301510 Rev.
LE910Cx mPCIe HW Design Guide Temperature range Case Range Note The module is fully functional(*) in all the –20°C ÷ +55°C temperature range, and it fully meets the 3GPP specifications. The module is fully functional (*) in all the temperature range. Operating However, there may be some Temperature...
LE910Cx mPCIe HW Design Guide 3. PINS ALLOCATION Pin-out LE910C1 mPCIe Pin out follows the mPCIe specification Signal Function Type Comment Power Supply 3.3V Main Power Supply for 3.3V I/O Power Supply UART/DVI interface 3.3V Main Power 3V3_AUX Power Supply 3.3V Main Power 3V3_AUX Power...
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LE910Cx mPCIe HW Design Guide Ground Ground Ground Signal Function Type Comment SIM Card Interface External SIM signal – SIMVCC 1.8 / 3V Power supply for the SIM External SIM signal - SIMIO 1.8 / 3V Data I/O External SIM signal – SIMCLK 1.8 / 3V Clock...
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LE910Cx mPCIe HW Design Guide Signal Function Type Comment Digital Voice Interface (DVI) Digital Audio Interface PCM_CLK 1.8V (BIT Clock) Digital Audio Interface PCM_TX 1.8V (TX Out of the card) Digital Audio Interface PCM_RX 1.8V (RX Into the card) Digital Audio Interface PCM_SYNC 1.8V (Frame_Sync)
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LE910Cx mPCIe HW Design Guide Signal Function Type Comment Miscellaneous Functions Active low output signal WAKE_N used to wake up the 3.3V system from stand-by Active low signal for W_DISABLE_N wireless disabling 3.3V (Flight mode) Active low functional reset PERST_N 3.3V input to the card Supply output for external...
LE910Cx mPCIe HW Design Guide 4. 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 overall performances, hence read carefully the requirements and the guidelines that will follow for a proper design. Power Supply Requirements The external power supply must be connected to VBATT signal and must fulfil the following requirements:...
LE910Cx mPCIe HW Design Guide 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. 4.3.1. Electrical Design Guidelines The electrical design of the power supply depends strongly from the power source where this power is drained.
LE910Cx mPCIe HW Design Guide 4.3.1.2. +12V 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 suited and shall not be used.
LE910Cx mPCIe HW Design Guide 4.3.1.3. 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, hence a single 3.7V Li-Ion cell battery type is suited for supplying the power to the Telit LE910Cx Mini PCIe module.
LE910Cx mPCIe HW Design Guide 4.3.2. Thermal Design Guidelines The thermal design of the application board and the power supply heat sink should be done with the following specifications: • Typical average current consumption during xE910Cx Mini PCIe transmission @ Max PWR level at min battery level (LTE) : 700 mA •...
LE910Cx mPCIe HW Design Guide 4.3.3. Power Supply PCB layout Guidelines The GSM system is made in a way that the RF transmission is not continuous, else it is packed into bursts at a base frequency of about 216 Hz, and the relative current peaks can be as high as about 2.4A.
LE910Cx mPCIe HW Design Guide 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: Figure 3 Power supply recommended circuit 1VV0301510 Rev. 4 Page 31 of 79 2018-06-26...
LE910Cx mPCIe HW Design Guide VAUX/PWRMON Power Output A regulated power supply output is provided 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 as follows: Item Typical Output voltage...
LE910Cx mPCIe HW Design Guide GNSS LNA BIAS A dedicated regulated bias is provided to support active antenna GNSS applications. The operating range characteristics of the supply are as follows: Item Typical Output voltage 3.1V Output current 100mA Table 9 GNSS LNA BIAS NOTE: Follow LE9x0 AT Command User Guide 80407ST10116A to control dedicated enable GPS_LNA_EN (pin 48) for LE910Cx-mPCIe on...
LE910Cx mPCIe HW Design Guide 5. ELECTRICAL SPECIFICATION Absolute Maximum Ratings – Not Operational Caution - A deviation from the value ranges listed below may harm the LM940 module. Table 10 Absolute Maximum Ratings – Not Operational Symbol Parameter Unit VBATT Battery supply voltage on pin VBATT -0.5...
LE910Cx mPCIe HW Design Guide 6. DIGITAL SECTION Logic Levels ABSOLUTE MAXIMUM RATINGS: Parameter Input level on any digital pin (CMOS 1.8) with respect -0.3V 2.16V to ground Input level on any digital pin (CMOS 1.8) with respect -0.3V 0.3V to ground when VBATT is not supplied Table 12 Absolute Maximum Rating CMOS 1.8V...
LE910Cx mPCIe HW Design Guide Power On The LE910Cx-mPCIe will automatically power on as soon as VBATT applied to the module. The LE910Cx-mPCIe is not yet activated because the SW initialization process of the module is still in process internally. It takes some time to fully complete the HW and SW initialization of the module.
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LE910Cx mPCIe HW Design Guide The following flow chart shows the proper turn on procedure: “Modem ON Proc” START PWR Supply ON Delay = 8 s Delay = 20 s PWRMON=ON Enter AT<CR> AT Answer in AT Init Sequence 1sec? Delay 1s –...
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LE910Cx mPCIe HW Design Guide A flow chart showing the AT commands managing procedure is displayed below: “Start AT CMD” START Delay = 300 msec Enter AT <CR> AT answer in Disconnect PWR Supply 1 sec ? “Start AT CMD” GO TO “Modem ON Proc.”...
LE910Cx mPCIe HW Design Guide Unconditional Restart To unconditionally restart the LE910Cx-mPCIe, the pad PERST_N (pin 22) must be tied low for at least 200 milliseconds and then released. The hardware unconditional Restart must not be used during normal operation of the device since it does not detach the device from the network.
LE910Cx mPCIe HW Design Guide A typical circuit for implementing an unconditional reset is shown below: Figure 5 Recommended Reset driver circuit NOTE: Recommended values R2 = 47kΩ, R1 = 10kΩ. 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 LE910Cx-mPCIE when the module is powered off or during a reboot transition.
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LE910Cx mPCIe HW Design Guide In the following flow chart is detailed the proper restart procedure: Modem Reset Proc. PERST_N = LOW Delay 200ms PERST_N = OPEN Delay 1s Apply Power On Procedure Note: In order to prevent a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the LE910Cx-mPCIe when the module is powered OFF or during an ON/OFF transition.
LE910Cx mPCIe HW Design Guide Power OFF procedure To turn OFF the LE910Cx-mPCIe module, the W_DISABLE_N pin must be asserted low, otherwise the module will be power up immediately. For proper shutdown operation use AT#SHDN command. When a shutdown command is sent, LE910Cx goes into the finalization state and at the end of the finalization process shuts down PWRMON.
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LE910Cx mPCIe HW Design Guide The below flow chart is detailed the proper power OFF procedure: Modem Power Proc. W_DISABLE_N Delay 200ms AT#SHDN Delay 15s PWRMON is Delay 5s OFF? 1 sec ? Done Note: Software shutdown feature is not supported on early engeeniring samples.
LE910Cx mPCIe HW Design Guide Control signals Signal Function Type WAKE_N Active low signal used to wake up the 3.3V system from stand-by W_DISABLE_N Active low signal for wireless disabling 3.3V (Airplane mode) PERST_N Active low functional reset to the card 3.3V LED_WWAN_N Active low, open drain signal for...
LE910Cx mPCIe HW Design Guide The below picture shows the internal WAKE_N driver Figure 7 WAKE_N internal driver WAKE_N output may be connected to an edge sensitive application input (e.g. a microcontroller input with IRQ enabled). No external pull-up is needed, since it is internally implemented.
LE910Cx mPCIe HW Design Guide 6.5.2. W_DISABLE_N W_DISABLE_N is used to force the module into airplane mode. Thanks to its internal pull- up, leaving this pin unconnected allows the module to operate normally. This switch follows the behavior as described in the PCI Express Mini Card Electromechanical Specification Revision 2.1.
LE910Cx mPCIe HW Design Guide 6.5.4. PERST_N PERST_N is used to reset the LE910Cx-mPCIe. Whenever this signal is pulled low, the LE910Cx-mPCIe is reset. When the device is reset it stops any operation. After the release of the reset the LE910Cx is unconditionally restarted, without doing any detach operation from the network where it is registered.
LE910Cx mPCIe HW Design Guide Table Below lists the USB interface signals: Signal Pin No Usage USB_D- Minus (-) line of the differential, bi-directional USB signal to/from the peripheral device USB_D+ Plus (+) line of the differential, bi-directional USB signal to/from the peripheral device Table 21 USB Interface NOTE: USB_VBUS controlled internally by TGPIO_10.
LE910Cx mPCIe HW Design Guide 6.6.2. Serial Port The serial port is typically a secondary interface between the LE910Cx-mPCIe module and OEM hardware. MODEM SERIAL PORT 1(Main) is available on LE910Cx-mPCIe adaptor Several configurations can be designed for the serial port on the OEM hardware. The most common configurations are: •...
LE910Cx mPCIe HW Design Guide 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. NOTE: For minimum implementations, only the TXD and RXD lines need be connected.
LE910Cx mPCIe HW Design Guide NOTE: The digital input lines operating at 1.8V CMOS therefore, the level translator IC must not be powered by the +3.8V supply of the module. Instead, it must be powered from a dedicated +1.8V power supply. RS232 Level Adaption Circuitry Example: Figure 9 Level Adapter Example NOTE:...
LE910Cx mPCIe HW Design Guide 6.6.3. I2C - Inter-integrated Circuit The LE910Cx-mPCIe supports an I2C interface on the following pins: • Pin 30 - I2C_SCL • Pin 32 - I2C_SDA The I2C can also be used externally by the end customer application. LE910Cx-mPCIe supports I2C Master Mode only.
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LE910Cx mPCIe HW Design Guide LE910Cx-mPCIe DVI has the following characteristics: • PCM Master mode or Slave mode using short or long frame sync modes • 16 bit linear PCM format • PCM clock rates of 256 kHz, 512 kHz, 1024 kHz and 2048 kHz (Default) •...
LE910Cx mPCIe HW Design Guide SIM Interface The SIM pins provide the connections necessary to interface to a SIM socket located on the host device. Voltage levels over this interface comply with 3GPP standards. SIMIN line terminated to GND internally for standard LE910Cx-mPCIe variant without either SIM holder or onboard eSIM.
LE910Cx mPCIe HW Design Guide 7. RF SECTION Bands Variants Please refer to the table provided in section 2.2 TX and RX characteristics Please refer to the Module’s Hardware User guide for the details Antenna requirements 7.3.1. Antenna Connectors The LE910Cx Mini PCIe adapter is equipped with a set of 50 Ω RF U.FL. connectors from Hirose U.FL-R-SMT-1(10).
LE910Cx mPCIe HW Design Guide Connecting cables between the module and the antenna must have 50 Ω impedance. If the impedance of the module is mismatched, RF performance is reduced significantly. If the host device is not designed to use the module’s diversity or GPS antenna, terminate the interface with a 50Ω...
LE910Cx mPCIe HW Design Guide 7.3.3. Antenna Diversity Requirements This product includes an input for a second Rx antenna to improve radio sensitivity. The function is called Antenna Diversity. Item Value Frequency range The customer must use the most suitable antenna band width for covering the frequency bands provided by the network operator while using the Telit module.
LE910Cx mPCIe HW Design Guide NOTE: It is recommended to add a DC block to the customer’s GPS application to prevent damage to the LE910Cx-mPCIe module due to unwanted DC voltage. 7.3.4.1. Combined GNSS Antenna The use of a combined RF/GNSS antenna is NOT recommended. This solution can generate an extremely poor GNSS reception.
LE910Cx mPCIe HW Design Guide 8.1.3. Bottom View The figure below shows mechanical bottom view of the LE910Cx-mPCIe as seen from bottom side. The figure shows the SIM holder although by default it is not mounted. Figure 14 LE910C1-mPCIe Bottom View 1VV0301510 Rev.
LE910Cx mPCIe HW Design Guide 8.1.4. Side View The figure below shows mechanical side view of the LE910Cx-mPCIe. Figure 15 LE910C1-mPCIe Side View 1VV0301510 Rev. 4 Page 64 of 79 2018-06-26...
LE910Cx mPCIe HW Design Guide 9. APPLICATION PCB DESIGN The LE910Cx-mPCIe modules have been designed in order to be compliant with a standard lead-free SMT process. Recommended footprint for the application LE910Cx-mPCIe modules fits any full mPCIe 52 pin socket and latch connectors compliant with PCI Express Mini Card Electromechanical Specification Revision 2.1 Given below example of board connector (MM60-52B1-E1-R650, JAE) and latch (MM60- EZH059-B5-R650, JAE) footprint for reference only:...
LE910Cx mPCIe HW Design Guide EMC RECOMMENDATIONS All LE910Cx-mPCIe signals are provided with some EMC protection. Nevertheless, the accepted level differs according to the specific pin. EMC Recommendations: Signal Function Contact All Pins All pins All functions ± 4KV ± 8KV Antenna Antenna Analog...
LE910Cx mPCIe HW Design Guide PACKING SYSTEM Tray The LE910Cx-mPCIe modules are packaged on trays of 20 pieces each: Modules per Trays per Modules per Envelopes per Carton Modules per Tray Envelope Envelope 5 + 1 empty Table 28 Tray Packing Order Type Quantity Minimum Order Quantity (MOQ)
LE910Cx mPCIe HW Design Guide Tray Drawing Figure 18 LE910C1-mPCIe Tray Drawing WARNING: These trays can withstand a maximum temperature of 65℃. 1VV0301510 Rev. 4 Page 69 of 79 2018-06-26...
LE910Cx mPCIe HW Design Guide Moisture sensitivity The LE910Cx-mPCIe is a Moisture Sensitive Device level 3, in according 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).
LE910Cx mPCIe HW Design Guide CONFORMITY ASSESSMENT ISSUES Declaration of Conformity Hereby, Telit Communications S.p.A declares that the LE910Cx-mPCIe is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: http://www.telit.com\red 1VV0301510 Rev.
LE910Cx mPCIe HW Design Guide 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: •...
LE910Cx mPCIe HW Design Guide ACRONYMS Telit Technical Support Centre TTSC Universal Serial Bus High Speed Data Terminal Equipment Universal Mobile Telecommunication System UMTS Wideband Code Division Multiple Access WCDMA High Speed Downlink Packet Access HSDPA High Speed Uplink Packet Access HSUPA Universal Asynchronous Receiver Transmitter UART...
LE910Cx mPCIe HW Design Guide DOCUMENT HISTORY Revision Date Changes 2018-01-11 First issue Updated weight 2018-02-28 Added note related to Power Down / Off Section 2.2 – Updated product Variants and Frequency Bands Section 3.1 – Updated pinout table 2018-06-11 Section 4.3.2 –...
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