L831-EAU-01 Hardware User Manual. Version: Update date:

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1 L831-EAU-01 Hardware User Manual Version: Update date:

2 Applicability Table No. Product model Description 1 L831-EAU-01 2 modes and 6 bands L831-EAU-01 Hardware User Manual Page 2 of 39

3 Copyright Copyright 2017Fibocom Wireless Inc. All rights reserved. Without the prior written permission of the copyright holder, any company or individual is prohibited to excerpt, copy any part of or the entire document, or distribute the document in any form. Notice The document is subject to update from time to time owing to the product version upgrade or other reasons. Unless otherwise specified, the document only serves as the user guide. All the statements, information and suggestions contained in the document do not constitute any explicit or implicit guarantee. Version Record Version Update Date Description V Initial release L831-EAU-01 Hardware User Manual Page 3 of 39

4 Contents 1 Foreword Introduction Reference Standard Related Documents Overview Introduction Specification Application Framework Hardware Framework Application Interface M.2 Interface Pin Distribution Pin Definition Power Supply Power Supply Logic level Power Consumption Control Signal Module Start-Up Start-up Circuit Start-up Timing Sequence Module Shutdown Software Shutdown Hardware Shutdown Host Reboot Module Reset USB Interface USB Interface Definition USB2.0 Interface Application USIM Interface USIM Pins USIM Interface Circuit N.C. SIM Card Slot L831-EAU-01 Hardware User Manual Page 4 of 39

5 3.5.3 USIM Hot-Plugging USIM Design Status Indicator LED#1Signal WAKE_WWAN# Interrupt Control W_DISABLE# GNSS Control Clock Interface Config Interface Other Interfaces Radio Frequency RF Interface RF Interface Functionality RF Connector Characteristic RF Connector Dimension Operating Band Transmitting Power Receiver Sensitivity GNSS Antenna Design Structure Specification Product Appearance Dimension of Structure M.2 Interface Model M.2 Connector Storage Storage Life Packing Tray Package Tray size...39 L831-EAU-01 Hardware User Manual Page 5 of 39

6 1 Foreword 1.1 Introduction The document describes the electrical characteristics, RF performance, dimensions and application environment, etc. of L831-EAU-01 module. With the assistance of the document and other instructions, the developers can quickly understand the hardware functions of L831-EAU modules and develop products. 1.2 Reference Standard The design of the product complies with the following standards: 3GPP TS V10.8.0: User Equipment (UE) conformance specification;radio transmission and reception (FDD);Part 1: Conformance specification 3GPP TS V10.6.0: User Equipment (UE) conformance specification; Radio transmission and reception; Part 1: Conformance testing 3GPP TS V10.0.0: USIM and IC card requirements 3GPP TS V4.15.0: Specification of the Subscriber Identity Module -Mobile Equipment (SIM-ME) interface 3GPP TS V : Characteristics of the Universal Subscriber Identity Module (USIM) application 3GPP TS V : Universal Subscriber Identity Module (USIM) Application Toolkit(USAT) 3GPP TS V10.3.0: ElectroMagnetic Compatibility (EMC) requirements for mobile terminals and ancillary equipment 3GPP TS V10.0.8: AT command set for User Equipment (UE) PCI Express M.2 Specification Rev Related Documents The performance test report of L831-EAU module RF Antenna Application Design Specification L8-Family System Driver Integration and Application Guidance L8-Family AT Commands Manual L831-EAU-01 Hardware User Manual Page 6 of 39

7 2 Overview 2.1 Introduction The L831-EAU is a highly integrated 4G wireless communication module which adopts the standard M.2 interface, and supports LTE FDD/WCDMA systems. 2.2 Specification Specification L831-EAU-01 Operating Band LTE FDD: Band 1, 3, 7, 8, 20, 28 WCDMA/HSPA+: Band I, VIII LTE FDD 150Mbps DL/50Mbps UL(Cat 4) Data Transmission UMTS/HSPA+ UMTS:384 kbps DL/384 kbps UL DC-HSDPA+:42Mbps DL(Cat 24)/5.76Mbps UL(Cat 6) Power Supply DC 3.135V~4.4V, Typical 3.3V Temperature Physical characteristics Operating temperature: -10 C ~+55 C Storage temperature: -40 C ~+85 C Interface: M.2 Key-B Dimension: 30 x 42 x 2.3mm Weight: About 5.4 g Interface Antenna WWAN Main Antenna x 1 WWAN Diversity Antenna(GNSS) x 1 USIM 3V/1.8V USB 2.0 x 1 Function Interface I2S(Reserved) I2C EINT System Indicator Clock(Reserved) L831-EAU-01 Hardware User Manual Page 7 of 39

Software Protocol Stack AT commands Firmware update IPV4/IPV6 3GPP TS 27.007 and 27.005, and proprietary FIBOCOM AT commands USB 2.

8 Software Protocol Stack AT commands Firmware update IPV4/IPV6 3GPP TS and , and proprietary FIBOCOM AT commands USB 2.3 Application Framework The peripheral applications for L831-EAU module are shown in Figure 2-1: Figure2-1 Application Framework L831-EAU-01 Hardware User Manual Page 8 of 39

2.4 Hardware Framework The hardware framework in Figure 2-2 shows the main hardware functions of L831-EAU module, including base band and RF functions.

9 2.4 Hardware Framework The hardware framework in Figure 2-2 shows the main hardware functions of L831-EAU module, including base band and RF functions. Baseband contains the followings: UMTS/LTE FDD controller/power supply NAND/Micron LPDDR2 RAM Application interface RF contains the followings: RF Transceiver RF Power/PA RF Front end RF Filter GNSS Antenna Figure 2-2 Hardware Framework 3 Application Interface 3.1 M.2 Interface The L831-EAU module applies standard M.2 Key-B interface, with a total of 75 pins. L831-EAU-01 Hardware User Manual Page 9 of 39

10 3.1.1 Pin Distribution Figure 3-1 Pin Distribution L831-EAU-01 Hardware User Manual Page 10 of 39

11 Note: Pin Notch represents the gap of the gold fingers Pin Definition The pin definition is as follows: Pin Pin Name I/O Reset Value Pin Description Type 1 CONFIG_3 O L Connected to internal GND V PI Module main power input Power Supply 3 GND GND Power Supply V PI Module main power input Power Supply 5 GND GND Power Supply 6 FULL_CARD_POWER_OFF# I WWAN M.2 Power on/off control signal CMOS 1.8V 7 USB D+ I/O USB 2.0 D+ signal V 8 W_DISABLE# I PU WWAN M.2 RF Disable signal 3.3V/1.8V 9 USB D- I/O USB 2.0 D- signal V 10 LED#1 O OD System status LED, drain output CMOS 3.3V 11 GND GND Power Supply 12 Notch Notch 13 Notch Notch 14 Notch Notch 15 Notch Notch 16 Notch Notch 17 Notch Notch 18 Notch Notch 19 Notch Notch 20 I2S_CLK O PD I2S serial clock(reserved) CMOS 1.8V 21 CONFIG_0 O Not connected L831-EAU-01 Hardware User Manual Page 11 of 39

12 Pin Pin Name I/O Reset Value Pin Description Type 22 I2S_RX I PD I2S serial data input(reserved) CMOS 1.8V 23 WAKE_WWAN# O PU Wake up host signal(reserved) CMOS 1.8V 24 I2S_TX O PD I2S serial data output(reserved) CMOS 1.8V 25 DPR I PU Body SAR control signal(reserved) CMOS 1.8V 26 GNSS_DISABLE# I PU GNSS Disable signal(reserved) CMOS 1.8V 27 GND GND Power Supply 28 I2S_WA O PD 29 SSIC_RXN I/O I2S clock for left and right channels (Reserved) USB SSIC transmit data minus (Reserved) CMOS 1.8V 30 UIM_RESET O PP USIM reset signal 1.8V/3V 31 SSIC_RXP I/O USB SSIC transmit data plus (Reserved) 32 UIM_CLK O PP USIM clock signal 1.8V/3V 33 GND GND Power Supply 34 UIM_DATA I/O PU USIM data signal 1.8V/3V 35 SSIC_TXN I/O USB SSIC receive data minus (Reserved) 36 UIM_PWR O USIM power supply 1.8V/3V 37 SSIC_TXP I/O USB SSIC receive data plus (Reserved) 38 NC Not Connect 39 GND GND Power Supply 40 I2C_SCL O PU I2C serial clock signal CMOS 1.8V 41 NC Not Connect 42 I2C_SDA I/O PU I2C serial data signal CMOS 1.8V 43 NC Not Connect 44 I2C_IRQ I PU GNSS interrupt input signal CMOS 1.8V L831-EAU-01 Hardware User Manual Page 12 of 39

13 Pin Pin Name I/O Reset Value Pin Description Type 45 GND GND Power Supply 46 SYSCLK O L 26MHz clock output(reserved) 1.8V 47 NC Not Connect 48 TX_BLANKING O L PA Blanking Signal(Reserved) CMOS 1.8V 49 NC Not Connect 50 NC Not Connect 51 GND GND Power Supply 52 NC Not Connect 53 NC Not Connect 54 NC Not Connect 55 NC Not Connect 56 NC Not Connect 57 GND GND Power Supply 58 NC Not Connect 59 ANTCTL0 O L 60 COEX3 O 61 ANTCTL1 O L 62 COEX2 O 63 ANTCTL2 O L 64 COEX1 O Tunable antenna control signal (Reserved) WWAN and WIFI/BT module coexistence hardware synchronization signal(reserved) Tunable antenna control signal (Reserved) WWAN and WIFI/BT module coexistence hardware synchronization signal(reserved) Tunable antenna control signal (Reserved) WWAN and WIFI/BT module coexistence hardware synchronization signal(reserved) CMOS 1.8V CMOS 1.8V CMOS 1.8V L831-EAU-01 Hardware User Manual Page 13 of 39

14 Pin Pin Name I/O Reset 65 ANTCTL3 O Value Pin Description Tunable antenna control signal (Reserved) Type CMOS 1.8V 66 SIM_DETECT I SIM card detect CMOS 1.8V 67 RESET# I Reset WWAN control signal CMOS 1.8V 68 NC Not Connect 69 CONFIG_1 O L Connected to internal GND V PI Module main power input Power Supply 71 GND GND Power Supply V PI Module main power input Power Supply 73 GND GND Power Supply V PI Module main power input Power Supply 75 CONFIG_2 O L Connected to internal GND H: High Voltage Level L: Low Voltage Level PD: Pull-Down PU: Pull-Up T: Tristate OD: Open Drain PP: Push-Pull PI: Power Input PO: Power Output Note: The unused pins can be left floating. L831-EAU-01 Hardware User Manual Page 14 of 39

15 3.2 Power Supply The power interface of L831-EAU module as shown in the following table: DC Parameter(V) Pin Pin Name I/O Pin Description Minimum Typical Maximum Value Value Value 2,4,70,72, V PI Power supply input UIM_PWR PO USIM power supply 1.8V/3V Power Supply The L831-EAU module should be powered through the +3.3V pins, and the power supply design is shown in Figure 3-2: Figure 3-2 Power Supply Design L831-EAU-01 Hardware User Manual Page 15 of 39

16 The filter capacitor design for power supply as shown in the following table: Recommended capacitance 220uF 1uF,100nF Application Voltage-stabilizing capacitors Digital signal noise Description Reduce power fluctuations of the module in operation, requiring capacitors with low ESR. LDO or DC/DC power supply requires the capacitor of no less than 220uF The capacitor for battery power supply can be reduced to 100uF Filter out the interference generated from the clock and digital signals 39pF 900 MHz frequency band Filter out low frequency band RF interference 18pF,8.2pF,6.8pF 1800/1900,2100/2300,2500 /2600MHz frequency band Filter out medium/high frequency band RF interference The stable power supply can ensure the normal operation of L831-EAU module; and the ripple of the power supply should be less than 300mV in design. When the module operates under maximum transmitted power, the maximum operating current can reach 750mA, so the power source should be not lower than 3.0V, or the module may shut down or reboot Logic level The L831-EAU module 1.8V logic level definition as shown in the following table: Parameters Minimum Typical Maximum Unit 1.8V logic level V VIH V VIL V The L831-EAU module 3.3V logic level definition as shown in the following table: Parameters Minimum Typical Maximum Unit 3.3V logic level V VIH V VIL V L831-EAU-01 Hardware User Manual Page 16 of 39

17 3.2.3 Power Consumption In the condition of 3.3V power supply, the L831-EAU power consumption as shown in the following table Average Parameter Mode Condition Typical Current(mA) Ioff Power off Power supply,module power off 0.08 DRX=6 4.8 WCDMA DRX=8 4.1 ISleep DRX=9 4.0 LTE FDD Paging cycle #256 frames (2.56 sec DRX cycle) 3.8 Radio Off AT+CFUN=4,Flight mode 2.0 IWCDMA-RMS ILTE-RMS WCDMA LTE FDD WCDMA Data transfer Band 625 WCDMA Data transfer Band 600 LTE FDD Data transfer Band 630 LTE FDD Data transfer Band 675 LTE FDD Data transfer Band 715 LTE FDD Data transfer Band 680 LTE FDD Data transfer Band 640 LTE FDD Data transfer Band Control Signal The L831-EAU module provides two control signals for power on/off and reset operations, the pin defined as shown in the following table: Pin Pin Name I/O Reset Value Functions Type Power on/off signal, internal 150KΩ 6 FULL_CARD_POW ER_OFF# I pull-down. High: Power on 1.8V/3.3V Low or floating: Power off 67 RESET# I Reset signal, internal 100KΩ pull-up, active low. 1.8V L831-EAU-01 Hardware User Manual Page 17 of 39

3.3.1 Module Start-Up 3.3.1.1 Start-up Circuit By pulling up 1.8V/3.

8V/3.3V) is provided externally. The module provides two power-on modes: AP (Application Processor) controls 3.

controls FULL_CARD_POWER_OFF# module for powering on, the recommended circuit design is shown in Figure 3-4: Figure

18 3.3.1 Module Start-Up Start-up Circuit By pulling up 1.8V/3.3V voltage externally, the module power-on pin FULL_CARD_POWER_OFF# can power on, while the pull-up voltage VDD (1.8V/3.3V) is provided externally. The module provides two power-on modes: AP (Application Processor) controls 3.3V power module for powering on, the recommended circuit design is shown in Figure 3-3: Battery-powered, AP controls FULL_CARD_POWER_OFF# module for powering on, the recommended circuit design is shown in Figure 3-4: Figure 3-3 Power-on Circuit of AP Controlling 3.3V Power Module Figure 3-4 Power-on Circuit of AP Controlling FULL_CARD_POWER_OFF# Module L831-EAU-01 Hardware User Manual Page 18 of 39

3.3.1.2 Start-up Timing Sequence For the above two different power-on circuits, there are the following two power-on timings after the module powered on: AP (Application Processor) controls 3.

19 Start-up Timing Sequence For the above two different power-on circuits, there are the following two power-on timings after the module powered on: AP (Application Processor) controls 3.3V power module for powering on, the power-on timing is shown in Figure 3-5: Battery-powered, AP controls FULL_CARD_POWER_OFF# module for powering on, the power-on timing is shown in Figure 3-6: Figure 3-5 Power-on Timing Diagram of AP Controlling the Power Figure 3-6 Power-on Timing Diagram of AP Controlling FULL_CARD_POWER_OFF# Note: When AP controls FULL_CARD_POWER_OFF# for powering on, RESET# shall be pulled up at least 1ms in advance Module Shutdown The module can be shut down by software or hardware control: Shutdown Control Action Condition Software Sending AT+CPWROFF command Normal shutdown. Hardware AP controlling 3.3V power module for powering off AP controlling FULL_CARD_POWER_OFF# for powering off (battery-powered) Only used when a hardware exception occurs and the software control cannot be used L831-EAU-01 Hardware User Manual Page 19 of 39

20 Software Shutdown When the module receives the software shutdown command (AT+CPWROFF), the module will start the finalization process (the reverse process of initialization), and it will be completed after 3s. In the finalization process, the module will save the network, SIM card and some other parameters from memory, then clear the memory and PMU will be powered off. After shutdown, the VSD2_1V8 voltage is also shut down. The software control timing is shown in Figure 3-7: Figure 3-7 Software Shutdown Timing Control After the software shutdown, the FUL_CARD_POWER_OFF # pin will remain high which prevents the module from restarting again. To enable the next restart, the FUL_CARD_POWER_OFF# pin should be pulled low after shutting down more than 500ms (recommended1000ms). Note: The VSD2_1V8 signal is the internal PMU 1.8V output voltage which is not connected to the M.2 interface. The above timing of VSD2_1V8 is only for reference Hardware Shutdown By pulling down RESET for 1ms first and then FULL_CARD_POWER_OFF# (or controlling M.2 3.3V power by GPIO) for more than 500ms (1,000 ms recommended), the Power Management Unit (PMU) of the module loses its power, and then the module will shut down by hardware. As the PMU of the module loses its power when FULL_CARD_POWER_OFF# is pulled down, the module may be damaged after repeated reboots. The power-off timing diagram of hardware controlling 3.3V power is shown in Figure 3-8; The power-off timing diagram of hardware controlling FULL_CARD_POWER_OFF# is shown in Figure 3-9; L831-EAU-01 Hardware User Manual Page 20 of 39

Figure 3-8 Power-off Timing of Hardware Controlling 3.3V Power Figure 3-9 Power-off Timing of Hardware Controlling FULL_CARD_POWER_OFF# 3.3.3 Host Reboot According to two different connections of power-on circuit, the Host Reboot module has two recommended timing diagrams: AP (Application Processor) controls 3.

21 Figure 3-8 Power-off Timing of Hardware Controlling 3.3V Power Figure 3-9 Power-off Timing of Hardware Controlling FULL_CARD_POWER_OFF# Host Reboot According to two different connections of power-on circuit, the Host Reboot module has two recommended timing diagrams: AP (Application Processor) controls 3.3V power, the timing of Host Reboot module is shown in Figure 3-10: Battery-powered, the timing of Host Reboot module is shown in Figure 3-11: Figure 3-10 Recommended Timing of Host Reboot Module when AP Controls the Power L831-EAU-01 Hardware User Manual Page 21 of 39

22 Figure 3-11 Recommended Timing of Host Reboot Module in the case of Battery-powered Module Reset The L831-EAU module can reset to its initial status by pulling down the RESET# signal for more than 20ms (100ms is recommended), and the module will restart after the RESET# signal is released. When the customer executes RESET# function, the PMU remains its power inside the module. The recommended circuit design is shown in the Figure 3-12: 图 3-12 Recommended Design for Reset Circuit The reset control timing is shown in Figure 3-10: L831-EAU-01 Hardware User Manual Page 22 of 39

图 3-13 Reset Timing Control Note: RESET can be conducted only when system crash or no response occurs to L831-EAU module; if the problem cannot be resolved after RESET, it s recommended to pull down

23 图 3-13 Reset Timing Control Note: RESET can be conducted only when system crash or no response occurs to L831-EAU module; if the problem cannot be resolved after RESET, it s recommended to pull down FULL_CARD_POWER_OFF# for at least 500ms, and then pull it up to complete module reset. 3.4 USB Interface The L831-EAU module supports USB 2.0(High-Speed 480 Mbits/s). For the USB timing and electrical specification of L831-EAU module, please refer to Universal Serial Bus Specification 2.0 The USB of L831-EAU module can map one MBIM interface and one GNSS Sensor in Win10 system host. GNSS Sensor used for processing GNSS positioning MBIM interface used for initiating data services USB Interface Definition Pin# Pin Name I/O Reset Value Description Type 7 USB D+ I/O T USB Data Plus 9 USB D- I/O T USB Data Minus V, USB V, USB2.0 L831-EAU-01 Hardware User Manual Page 23 of 39

24 3.4.2 USB2.0 Interface Application The reference circuit is shown in Figure 3-14: Figure3-14 Reference Circuit for USB 2.0 Interface Since the module supports USB 2.0 High-Speed, it is required to use TVS diodes with equivalent capacitance of 1pF or smaller ones on the USB_D-/D+ differential signal lines, it is recommended to use 0.5pF TVS diodes. USB_D- and USB_D+ are high speed differential signal lines with the maximum transfer rate of 480 Mbit/s, so the following rules shall be followed carefully in the case of PCB layout: USB_D- and USB_D+ signal lines should have the differential impedance of 90 ohms. USB_D- and USB_D+ signal lines should be parallel and have the equal length, the right angle routing should be avoided. USB_D- and USB_D+ signal lines should be routed on the layer that is adjacent to the ground layer, and wrapped with GND vertically and horizontally. 3.5 USIM Interface The L831-EAU module has a built-in USIM card interface, which supports 1.8V and 3V SIM cards USIM Pins The USIM pins description as shown in the following table: Pin Pin Name I/O Reset Value Description Type 36 UIM_PWR PO USIM power supply 1.8V/3V 30 UIM_RESET O L USIM reset 1.8V/3V 32 UIM_CLK O L USIM clock 1.8V/3V L831-EAU-01 Hardware User Manual Page 24 of 39

25 Pin Pin Name I/O Reset Value Description Type 34 UIM_DATA I/O L USIM data,internal pull up(4.7kω) 1.8V/3V USIM detect, pull up(100kω) 66 SIM_DETECT I Active high, and high level indicates SIM card is inserted; and low level indicates SIM card is detached 1.8V USIM Interface Circuit N.C. SIM Card Slot The reference circuit design for N.C. (Normally Closed) SIM card slot is shown in Figure 3-15: Figure 3-12 Reference Circuit for N.C. SIM Card Slot The principles of the N.C. SIM card slot are described as follows: When the SIM card is detached, it connects the short circuit between CD and SW pins, and drives the SIM_DETECT pin low. When the SIM card is inserted, it connects an open circuit between CD and SW pins, and drives the SIM_DETECT pin high. Note: SIM_DETECT pull-up is 100K. L831-EAU-01 Hardware User Manual Page 25 of 39

26 3.5.3 USIM Hot-Plugging The L831-EAU module supports the SIM card hot-plugging function, which determines whether the SIM card is inserted or detached by detecting the SIM_DETECT pin state of the SIM card slot. The module detects that the SIM card is inserted when the SIM_DETECT pin is high, then executes the initialization program and finish the network registration after reading the SIM card information. When the SIM_DETECT pin is low, the module determines that the SIM card is detached and does not read the SIM card. Note: By default, SIM_DETECT is active-high USIM Design The SIM card circuit design shall meet the EMC standards and ESD requirements with the improved capability to resist interference, to ensure that the SIM card can work stably. The following guidelines should be noted in case of design: The SIM card slot placement should near the module as close as possible, and away from the RF antenna, DC/DC power supply, clock signal lines, and other strong interference sources. The SIM card slot with a metal shielding housing can improve the anti-interference ability. The trace length between the SIM card slot and the module should not exceed 100mm, or it could reduce the signal quality. The UIM_CLK and UIM_DATA signal lines should be isolated by GND to avoid crosstalk interference. If it is difficult for the layout, the whole SIM signal lines should be wrapped with GND as a group at least. The filter capacitors and ESD devices for SIM card signals should be placed near to the SIM card slot, and the ESD devices with 22~33pF capacitance should be used. 3.6 Status Indicator The L831-EAU module provides three signals to indicate the operating status of the module, and the status indicator pins as shown in the following table: Pin Pin Name I/O Reset Value Pin Description Type 10 LED#1 O PD System status LED, drain output. CMOS 3.3V L831-EAU-01 Hardware User Manual Page 26 of 39

27 Pin Pin Name I/O Reset Value Pin Description Type 23 WAKE_WWAN# O PU 48 TX_BLANKING O PD Module wakes up Host (AP). active-low (not support yet) PA Blanking output (not support yet) CMOS 1.8V CMOS 1.8V LED#1Signal The LED#1 signal is used to indicate the operating status of the module, and the detailed description as shown in the following table: Module Status RF function ON RF function OFF Date interaction LED1# Signal Low level (LED On) High level (LED Off) LED flashing The LED driving circuit is as follows: Figure 3-16 LED Driving Circuit Note: The resistance of LED current-limiting resistor is selected according to the driving voltage and the driving current WAKE_WWAN# The module can wake the Host (AP) by WAKE_WWAN# signal when there is data request, L831-EAU does not support waking the Host by WAKE_WWAN# signal. L831-EAU-01 Hardware User Manual Page 27 of 39

28 3.7 Interrupt Control The L831-EAU module provides four interrupt signals, and the pin definition is as follows: Pin Pin Name I/O Reset Value Pin Description Type 8 W_DISABLE# I PU Enable/Disable RF network CMOS 3.3V 25 DPR I PU 26 GNSS_DISABLE# I PU Body SAR control signal (Reserved) GNSS Disable signal (Reserved) CMOS 1.8V CMOS 1.8V 44 I2C_IRQ I PU I2C interrupt signal CMOS 1.8V W_DISABLE# The module provides a hardware pin to enable/disable WWAN RF function, and the function can also be controlled by the AT command. The module enters the Flight mode after the RF function is disabled. The definition of W_DISABLE# signal is as follows: W_DISABLE# signal High/Floating Low Function WWAN function enabled(at Commands can control the module entering or exit the Flight mode.) WWAN function disabled, the module enters Flight mode. Note: When W_DISABLE# is pulled down and then pulled up (or Floating), AT command (AT+CFUN=1) is required for exiting Flight mode! GNSS Control L831-EAU currently does not support controlling GNSS by GNSS_DISABLE#, but by AT command. AT+XLCSSHUTDOWN can shut down GNSS, and AT+XLCSINIT can reinitialize GNSS, the GNSS can be started up only after re-initialization when it has been shut down. L831-EAU-01 Hardware User Manual Page 28 of 39

29 3.8 Clock Interface L831-EAU module has reserved 26MHz clock output while it currently does not support such clock output. Pin Pin Name I/O Reset Value Pin Description Type 46 SYSCLK O 26M clock output(reserved) 1.8V 3.9 Config Interface The L831-EAU module provides four config pins for the configuration as the WWAN-SSIC-0 type M.2 module: Pin Pin Name I/O Reset Value Pin Description Type 1 CONFIG_3 O L Internally connected to GND 21 CONFIG_0 O NC 69 CONFIG_1 O L Internally connected to GND 75 CONFIG_2 O L Internally connected to GND The M.2 module configuration as the following table: Config_0 (pin21) Config_1 (pin69) Config_2 (pin75) Config_3 (pin1) Module Type and Main Host Interface Port Configuration NC GND GND GND WWAN-SSIC 0 Please refer to PCI Express M.2 Specification Rev Other Interfaces The ANT Tunable interface of the module is connected to an external open-line switch, so as to connect to antennas with different impedances and configure with different frequencies, L831-EAU currently does not support this function. The COEX interface of the module is designed to avoid mutual interference between WLAN/BT/GNSS during simultaneous operation, L831-EAU currently does not support this function. For USB Super-speed Inter-Chip (SSIC) interface of the module, L831-EAU currently does not support this function, and Floating is recommended. For I2S interface of the module, L831-EAU currently does not support this function, and Floating is recommended. L831-EAU-01 Hardware User Manual Page 29 of 39

30 4 Radio Frequency 4.1 RF Interface RF Interface Functionality The L831-EAU module supports two RF connectors used for external antenna connection. As the Figure 4-1 shows, Main is for Main antenna, used to receive and transmit RF signals; AUX is for Diversity (GNSS) antenna, used to receive diversity RF. Figure 4-1 RF connectors RF Connector Characteristic Rated Condition Environment Condition Frequency Range DC to 6GHz Temperature Range Characteristic Impedance 50Ω 40 C to +85 C RF Connector Dimension The L831-EAU module adopts standard M.2 module RF connectors, and the connector size is 2*2*0.6m. The connector dimension is shown as following picture: L831-EAU-01 Hardware User Manual Page 30 of 39

31 Figure 4-2 RF connector dimensions Figure mm coaxial antenna dimensions Figure 4-4 Schematic diagram of 0.81mm coaxial antenna connected to the RF connector L831-EAU-01 Hardware User Manual Page 31 of 39

32 4.2 Operating Band The L831-EAU module operating bands of the antennas are as follows: Operating Band Description Mode Tx (MHz) Rx (MHz) Band MHz LTE FDD/WCDMA Band MHz LTE FDD Band MHz LTE FDD Band 8 900MHz LTE FDD/WCDMA Band MHz LTE FDD Band MHz LTE FDD Transmitting Power The transmitting power for each band of the L831-EAU module as shown in the following table: Mode Band Tx Power(dBm) Note WCDMA Band I 23.5±1 Band VIII 23.5±1 Band 1 23±1 10MHz Bandwidth, 1 RB Band 3 23±1 10MHz Bandwidth, 1 RB LTD FDD Band 7 23±1 10MHz Bandwidth, 1 RB Band 8 23±1 10MHz Bandwidth, 1 RB Band 20 23±1 10MHz Bandwidth, 1 RB Band 28 23±1 10MHz Bandwidth, 1 RB L831-EAU-01 Hardware User Manual Page 32 of 39

33 4.4 Receiver Sensitivity The receiver sensitivity for each band of the L831-EAU module as shown in the following table: Mode Band Rx Sensitivity(dBm) Typical Note WCDMA Band I BER<0.1% Band VIII BER<0.1% Band MHz Bandwidth Band MHz Bandwidth LTE FDD Band MHz Bandwidth Band MHz Bandwidth Band MHz Bandwidth Band MHz Bandwidth Note: The above values are measured for the dual antennas situation (Main + Diversity). For single main antenna (without Diversity), the sensitivity will drop around 3dBm for each band of LTE. 4.5 GNSS L831-EAU module supports GPS and GLONASS, as well as agps. It adopts two-in-one antenna of RF Diversity and GNSS. GNSS can be enabled and disabled by AT command, see AT command manual for details. In Win10 system, GNSS outputs data by GNSS Sensor. Description Condition Test Result GPS Fixing 80mA / -130dBm GPS Tracking 80mA/ -144dBm Power GLONASS Fixing 95mA/ -130dBm GLONASS Tracking 95mA/ -144dBm Sleep 2.5mA Cold Start 35s / -130dBm GPS Warm Start 30s / -130dBm TTFT Hot Start 1s / -130dBm L831-EAU-01 Hardware User Manual Page 33 of 39

34 Description Condition Test Result GLONASS Cold Start Warm Start Hot Start 30s / -130dBm 28s / -130dBm 1s / -130dBm GPS Acquisition -146dBm Sensitivity Tracking -160dBm GLONASS Acquisition -143dBm Tracking -159dBm Note: The GNSS current is measured under RF disabled condition. 4.6 Antenna Design The L831-EAU module provides main and diversity antenna interfaces, and the antenna design requirements as shown in the following table: L831-EAU module Main antenna requirements Frequency range Bandwidth (WCDMA) The most proper antenna to adapt the frequencies should be used. WCDMA band I(2100) : 250 MHz WCDMA band VIII(900) : 80 MHz Bandwidth (LTE) Impedance LTE band 1(2100): LTE Band 3(1800): LTE band 7(2600): LTE Band 8(900): LTE band 20(800): LTE Band 28(750): 50 Ohm 250 MHz 170 MHz 190 MHz 80 MHz 71 MHz 100 MHz Input power Recommended standing-wave ratio (SWR) > 25dBm average power WCDMA & LTE 2:1 L831-EAU-01 Hardware User Manual Page 34 of 39

35 5 Structure Specification 5.1 Product Appearance The product appearance for L831-EAU-01 module is shown in Figure 5-1: 5.2 Dimension of Structure Figure 5-1 Module Appearance The structural dimension of the L831-EAU module is shown in Figure 5-2: Figure 5-2 Dimension of Structure(Unit:mm) L831-EAU-01 Hardware User Manual Page 35 of 39

5.3 M.2 Interface Model The L831-EAU M.2 module adopts 75-pin gold finger as external interface, where 67 pins are signal pins and 8 pins are notch pins as shown in Figure 3-1.

36 5.3 M.2 Interface Model The L831-EAU M.2 module adopts 75-pin gold finger as external interface, where 67 pins are signal pins and 8 pins are notch pins as shown in Figure 3-1. For module dimension, please refer to chapter 5.2. Based on the M.2 interface definition, L831-EAU module adopts Type 3042-S3-B interface (30x42mm, the component maximum height on t top layer is 1.5mm, PCB thickness is 0.8mm, and KEY ID is B). 5.4 M.2 Connector The L831-EAU module connects to AP via M.2 connector, it is recommended to use M.2 connector from LOTES company with the model APCI0026-P001A as shown in Figure 5-3. The package of connector, please refer to the specification. L831-EAU-01 Hardware User Manual Page 36 of 39

37 Figure 5-3 M.2 Dimension of Structure 5.5 Storage Storage Life Storage Conditions (recommended): Temperature is 23 ± 5, relative humidity is RH 35-70%. Storage period (sealed vacuum packing): Under the recommended storage conditions, the storage life is 12 months. 5.6 Packing The L831-EAU module uses the tray sealed vacuum packing, combined with the outer packing method using the hard cartoon box, so that the storage, transportation and the usage of modules can be protected to the greatest extent. Note: The vacuum package bag includes the humidity card and a desiccant. The module is the humidity sensitive device, and the humidity sensitivity level is Class 3, which meets the requirements of the American Electronic Component Industry Association (JEDEC). Please read the relevant application guidance and precautions referred to herein, to avoid the permanent damage to the product caused by humidity. L831-EAU-01 Hardware User Manual Page 37 of 39

38 5.6.1 Tray Package The L831-EAU module uses tray package, 20 pcs are packed in each tray, with 5 trays in each box and 6 boxes in each case. Tray packaging process is shown in Figure 5-4: Figure 5-4 Tray Packaging Process L831-EAU-01 Hardware User Manual Page 38 of 39

39 5.6.2 Tray size The pallet size is 330*175*6.0mm, as shown in Figure 5-5: (Unit:mm) ITEM L W H T A0 B0 DIM 330.0± ± ± ±0.1 43± ±0.3 ITEM A1 B1 C D E F DIM 294.0± ± ± ± ± ±0.2 ITEM G J DIM 105.0± ±0.2 Figure5-5 tray size L831-EAU-01 Hardware User Manual Page 39 of 39

L850-GL Hardware User Manual. Version:1.0.3 Update date:july 26,2017

L850-GL Hardware User Manual. Version:1.0.3 Update date:july 26,2017 L850-GL Hardware User Manual Version:1.0.3 Update date:july 26,2017 Applicability Table No. Product model Description 1 L850-GL-00 NA 2 L850-GL-01 NA 3 L850-GL-02 NA 4 L850-GL-03 NA 5 L850-GL-05 NA 6 L850-GL-10