FCC ID: 2AC88-GLMM18A02 LTE MODULE

uCloudlink M2 Mini PCIe-C Hardware Design Guide GLMM18A02 LTE Module Version: uCloudlink M2 Mini PCIe-C _Hardware Design Guide _V1.0 Date: 05/22/2018 135 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 uCloudlink was found by some senior international communications experts. uCloudlink has its headquarter, R&D center and call center located in Shenzhen, various branch offices and operations centers in the United States, United Kingdom and Hong Kong(China). uCloudlink has been focusing on Cloud SIM technology and providing more convenient, fast and cheap data services for mobile users and enterprise users with the coverage more than 100 countries and regions globally so they can access the Internet at local rate anywhere, anytime. Meanwhile, setting up the worlds leading Cloud SIM PaaS brings the benefits of winning and serving customers with lower cost to these global mobile data providers. uCloudlink has achieved success in the wireless industry by providing Internet access for more than a hundred million users. Now we are on our way to enter Internet of Things (IoT) market with the aim to provide global connectivity for billion IoT links. M2 is the M2M module based on Cloud SIM technology launched by uCloudlink providing SIM-

free wireless access services for Industrial IoT (IIoT), Connected Car, Vending Machine, Advertising Machine and POS Machine and more across different network operators. uCloudlink always strives to provide our customers with the fastest and most comprehensive services. Should you have any questions, please contact our headquarter in Shenzhen as follows:

Shenzhen uCloudlink Network Technology Co., Ltd Address: 3rd Floor, A Zone, Building 1, High-tech Zone, Shenzhen. E-mail: IOT@ucloudlink.com Tel: 0755-2639-920 235 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 Preface This guide can help our customers to design their products. They shall design the product according to the specifications and parameters contained herein. We shall not be liable or responsible for any loss or damage resulting from their improper operation. We reserve the right to make any updates and any other modifications to this manual at any time without prior notice. Copyright No part of this manual may be reproduced or transmitted in any form or by any means without prior written consent of Shenzhen uCloudlink Network Technology Co., Ltd (uCloudlink). Copyright Shenzhen uCloudlink Network Technology Co, Ltd 2018. All Rights Reserved 335 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 Revision History Revision Date Author Description 1.0 2018/05/22 Max Wei Ji Yongshun Initial Release 435 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 Contents Revision History ............................................................................................................................ 4 Contents ....................................................................................................................................... 5 Table Index ................................................................................................................................... 6 Figure Index .................................................................................................................................. 7 1 Introduction ............................................................................................................................. 8 1.1 Safety Information ...................................................................................................................... 8 2 Product Overview ..................................................................................................................... 9 2.1 About This Chapter ..................................................................................................................... 9 2.2 Product Introduction................................................................................................................... 9 2.3 Key features ............................................................................................................................. 10 2.4. Function Overview ................................................................................................................... 13 3. Interface Application ............................................................................................................. 14 3.1. About This Chapter .................................................................................................................. 14 3.2. M2 Module Interface ............................................................................................................... 14 3.3. Power Interface ........................................................................................................................ 19 3.4. UART Interface ......................................................................................................................... 20 3.5. USIM Card Interface ................................................................................................................. 21 3.6. USB Interface ........................................................................................................................... 22 3.7. Signal Control Signal ................................................................................................................ 23 3.7.1. W_DISABLE# Signal ........................................................................................................ 24 3.7.2. PERST# Signal ................................................................................................................. 24 3.7.3. LED_WWAN# Signal ....................................................................................................... 25 3.7.4. WAKEUP_IN and WAKEUP_OUT Signal ......................................................................... 25 3.8. Antenna Interface .................................................................................................................... 26 3.8.1. Antenna Requirements .................................................................................................. 26 4 Electrical Interface and RF Specifications .............................................................................. 27 4.1. About This Chapter ............................................................................................................... 27 4.2. Power Supply Ratings ............................................................................................................ 27 4.3. I/O Interface .......................................................................................................................... 28 4.4. RF Specifications .................................................................................................................... 28 4.5. WIFI/BT Receiving Sensitivity .................................................................................................... 29 4.6. Electrostatic Discharge Characteristics ................................................................................. 30 5 Mechanical Dimensions ........................................................................................................ 31 5.1. Outer Dimension of M2 Module ........................................................................................... 31 535 5.2. Standard Dimension .............................................................................................................. 31 6 Appendix Terms and Abbreviation ........................................................................................ 33 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 Table Index Table 1 M2 module features................................................................................................................ 9 Table 2 Key Features............................................................................................................................ 9 Table 3 Definition of I/O Parameters ................................................................................................. 13 Table 4 Definition of pins on the M2 module..................................................................................... 14 Table 5 Definition of power interfaces............................................................................................... 17 Table 6 UART interface signals........................................................................................................... 18 Table 7 USIM Card interface signals................................................................................................... 19 Table 8 Definition of USB Interfaces..................................................................................................... 20 Table 9 Definition of the pins on the signal control interface.............................................................. 22 Table 10 Operating status of radio frequency..................................................................................... 23 Table 11 Network status indication..................................................................................................... 24 Table 12 WAKEUP_IN and WAKEUP_OUT pin..................................................................................... 24 Table 13 Antenna requirements.......................................................................................................... 25 Table 14 Input power range................................................................................................................ 26 Table 15 I/O Interface.......................................................................................................................... 27 Table 16 RF output power.................................................................................................................... 27 Table 17 RF receiving sensitivity........................................................................................................ 28 Table 18 ESD Characteristics............................................................................................................... 29 Table 19 Terms and Abbreviations..................................................................................................... 32 635 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 Figure Index Figure 1 Functional Diagram ............................................................................................................. 12 Figure 2 Pin Assignment (Top View)................................................................................................... 16 Figure 3 Recommended Power Circuit of the M2 module................................................................. 17 Figure 4 Recommended Power Circuit of Level Match...................................................................... 18 Figure 5 Circuit of the 6-pin USIM Card interface.............................................................................. 19 Figure 6 Recommended Circuit of USB Interface............................................................................... 21 Figure 7 Timing sequence of module reset........................................................................................ 23 Figure 8 Driving circuit....................................................................................................................... 24 Figure 9 Antenna Interface................................................................................................................. 25 Figure 10 Outer dimension of the M2 module.................................................................................... 30 Figure 11 Standard dimension of MINI PCI EXPRESS card.................................................................. 31 Figure 12 Mini PCI Express Connector ................................................................................................ 31 735 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 1 Introduction This document gives a general introduction of key features, functions, interface description, electrical characteristics and RF characteristics and layout of the M2 Mini PCIe-C module (M2). 1.1 Safety Information The following safety precautions shall be observed to ensure your safety and protect your device and working environment from potential damage. Road safety comes first! Using a mobile device while driving is prohibited even it has speakerphone. Please pull over your car in a safe place first then make or receive a call. Switch your phone off before take-off. Electromagnetic waves emitted by your phone may affect the electronic navigation equipment in the aircraft. The ignorance of this tip may affect fight safety or even break the law. Be aware if there are any restrictions on mobile device use during a hospital or healthcare facility. All medical equipment may be susceptible to radio frequency interference, which could affect performance, so you shall switch off your mobile device. It cannot guarantee that mobile device can access Internet under any circumstances. For example, when you run out of credits or insert invalid SIM card. For any emergency situations, remember to make the emergency call and make sure your device is powered on and you are in an area with known-good signal strength. Your mobile device would send and receive radio frequency signal when switched on. The interference occurs when you place the device near television, radio, computer and other electronic devices. Do not place your mobile device near inflammable gas. Always switch off your mobile device near gas station, oil depot, chemical plant or explosion areas. Operating the mobile device in potential explosion areas has risk. 835 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 2 Product Overview 2.1 About This Chapter M2 module is the LTE module with the PCI Express Mini Card 1.2 standard interface providing FDD-LTE/TDD-LTE/WCDMA /GSM network connections and compatible with embedded operating system, such as Linux or Android. M2 module is available for the following occasions:

Tablet, notebook Remote monitoring Car-mounted device Wireless POS machine Intelligent metering Wireless router, exchanger Other wireless devices This chapter gives a brief introduction of the M2 module including:

Product Introduction Key Features Function Overview 2.2 Product Introduction The M2 module is only available with Data Only version. Table 1 M2 module features 935 Name Description uCloudlink M2 Mini PCIe-C LTE-FDD: B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B19/B20/B26/B28 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 TDD-LTE: B34/B38/B39/B40/B41 WCDMA: B1/B2/B4/B5/B8 GSM850/900/1800 /1900 2.4G WiFi802.11 b/g/n GPS

/BT 2.3 Key features The following table describes detailed features of the M2 module. Table 2 key features Feature Description Mini PCle Interface Standard PCI Express Mini Card 1.2 interface Power Voltage 3.3~3.6V Class 4 (33dBm2dB) for GSM900 Class 1 (30dBm2dB) for DCS1800 Class E2 (27dBm3dB) for GSM900 8-PSK Class E2 (26dBm3dB) for DCS1800 8-PSK Output Power Class 3 (24dBm+1/-3dB) for WCDMA bands Class 3 (23dBm2dB) for LTE FDD bands Class 3 (23dBm2dB) for LTE TDD bands Up to non-CA CAT7 Support 1.4~20MHz RF bandwidth LTE Support downlink multi-user MIMO 1035 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 FDD: Max uplink speed 50Mbps, max downlink speed 150Mbps TDD: Max uplink speed 35Mbps, max downlink speed 130Mbps Support 3GPP R8 DC-HSPA+

Support 16-QAM, 64-QAM and QPSK modulation WCDMA 3GPP R6 CAT6 HSUPA: max uplink speed 5.76Mbps 3GPP R8 CAT24 DC-HSPA+: max downlink speed 42Mbps R99:

CSD transmission speed: 9.6kbps, 14.4kbps GPRS:

GPRS multi-slot class 12 by default Encoding: CS-1/CS-2/CS-3 and CS-4 Up to 4 RX time slots per frame EDGE:

Support EDGE multi-slot class 12 by default GSM/GPRS/EDGE Support different modulation and encoding of GMSK and 8-PSK Support uplink and downlink encoding CS 1-4 and MCS 1-9 Internet Protocol Support PAP (Password Authentication Protocol) and CHAP Support TCP/UDP/PPP/FTP/HTTP/SMTP/MMS/NTP/PING/QMI

(Challenge Handshake Authentication Protocol) USIM Interface Support USIM/SIM: 1.8V and 3.0V UART Interface Support RTS and CTS hardware flow control Baud rate can reach up to 230400bps, 115200 bps by default Used for AT command and data transmission 1135 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 Compliant with USB2.0 specification (slave only)the data transfer can reach up to 480 Mbps. USB Interface Used for firmware upgrade, AT command, data transmission, log output;

USB driver: Support Windows 7, Windows 8/8.1, Linux 2.6 or Later, Android 4.0/4.2/4.4/5.0 AT Commands Compliant with 3GPP TS 27.007, 27.005 and enhanced AT commands Antenna Interface Support main antenna pad, diversity antenna pad and WIFI/BT antenna pad WIFI Protocol:

802.11 b/g/n Dimension and weight Dimensions (L x W x H): 51.0 mm 3 0.0 mm4 .9 mm Weight: about 11 g Operating Temperature Normal operating temperature: -30C ~+75C 1) Extended operating temperature: -40C ~ +85C 2) Firmware upgrade USB interface or DFOTA interface All hardware components meet the EU RoHS standard RoHS Note 1) when M2 module works within this temperature range, and all its RF performances comply with the 3GPP standard requirements. 2) when M2 module works within this temperature range, and can still work properly with data transmission, irretrievable malfunctions wont occur; radio spectrum and network wont be affected. And only few features may be out of the 3GPP standard such as output power. When the temperature is back within normal range, all features properly resume. 1235 2.4 Function Overview uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 Figure 1 shows the functional diagram of the M2 module. The major functions are following:

Support line 1 of USIM card interface Support line 1 of USIM 2.0 interface Support line 1 of UART interface Support LED status indication Support RF shut-down feature Support external reset feature Support sleep control and sleep indication Support 3 RF antenna interfaces VBAT UART USB USIM M n i i P C I E x p r e s s I n t e r f a c e WAKEUP_IN WAKEUP_OUT W_DISABLE#

PERST#

LED_WWAN#

Main Antenna WIFI BT Antenna Diversity Antenna Antenna Antenna Interface Antenna Interface uCloudlink M2 Mini PCIe-C Figure 1 Functional Diagram 1335 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 3 Interface Application 3.1 About This Chapter This chapter mainly gives the external application interfaces of the M2 module, including:

Power Interface UART Interface USIM Interface USB Interface Control Signal Antenna Interface 3.2 M2 Module Interface 3.2.1 Interface Definition The interface of the M2 module is the standard Mini PCI Express interface. For details about the 52-pin interfaces, see table 3 I/O parameters definition. Table 3 Definition of I/O parameters Mark IO DI DO AI Description Bidirectional input/output Digital Input Digital Output Analog Input 1435 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 AO PI PO Analog Output Power Input Power Output OC Open Collector Table 4 Definition of pins on the M2 module Pin No. Status Pin Name I/O Description Note 1 2 3 4 5 6 7 8 9 10 11 WAKE#

MIC_P*

3.3Vaux VBAT COEX1 MIC_N*

GND GND AI PI AI COEX2 SPK_P*

AO Audio Input(Positive) Power Input Audio Input(Negative) Ground Audio Output(Positive) 1.5V NC CLKREQ#

SPK_N*

AO UIM_PWR USIM_VDD PO GND GND Audio Output(Negative) USIM Power Output Ground UIM_DATA USIM_DATA IO USIM data signal REFCLK-

VDD_EXT PO 1.8V Power Output 1535 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 12 13 14 15 16 17 18 UIM_CLK USIM_CLK DO USIM Clock Signal REFCLK+

RESERVED Reserved UIM_RESET USIM_RST DO USIM Reset Signal GND GND UIM_VPP RESERVED RESERVED RESERVED GND GND Ground Reserved Reserved Ground 19 RESERVED WAKEUP_IN DI 20 W_DISABLE#

W_DISABLE#

DI Module Sleep Control Pin Allows to sleep when low level Disable RF Valid when Communication low level 21 GND GND Ground 22 PERST#

PERST#

23 PERn0 UART_RXD 24 3.3Vaux VBAT DI DI PI 25 PERp0 UART_RTS DO 26 27 GND GND GND GND 28 1.5V UART_CTS DI Reset Control Pin Valid when low level Module receiving end Power Input Module request to send Ground Ground Module request to delete 1635 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 29 GND GND Ground 30 SMB_CLK UART_DCD DO 31 PETn0 UART_TXD DO 32 SMB_DATA WAKEUP_OUT DO Module Carrier Sense Module sending end Module Sleep Indication 33 PETp0 PERST#

DI Reset Control Pin Valid when low level 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 GND GND GND GND USB_D-

USB_DM GND GND USB_D+

USB_DP 3.3Vaux GND 3.3Vaux VBAT GND VBAT IO IO PI PI Ground Ground USB Differential Signal (-) Ground USB Differential Signal (+) Power Input Ground Power Input LED_WWAN#

LED_WWAN#

OC Status Light Indication GND GND LED_WLAN#

RESERVED RESERVED RESERVED LED_WPAN#

UART_DTR RESERVED RESERVED 1.5V NC RESERVED RESERVED GND GND RESERVED RESERVED DI Ground Reserved Reserved DTE is ready Reserved Reserved Ground Reserved 1735 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 52 3.3Vaux VBAT PI Power Input Note Besides USIM interfaces, the voltage domain of other digital interfaces is 1.8V, and the 1 USIM interface is available with 1.8V and 3.0V. Please suspend all of NC, RESERVED and unused pins.

* indicates the audio feature is not available and reserved function. 2. 3. 3.2.2 Pin Assignment The following figure shows the pin assignment of the M2 module, and the top face is for sticking antenna connector and opposite face is the BOT. 1835 Figure 2 Pin Assignment (Top View) 3.3 Power Interface uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 Table 5 lists the definitions of the pins on the power supply interface. Table 5 Definition of power interfaces Pin No. Pin Name I/O Description 2, 24, 39 , 41, 52 VBAT 4, 9, 15, 18, 21, 3.3~3.6V Power Input PI 26, 27, 29, 34 ,35, GND Ground 37, 40, 43, 50 When the M2 module works normally, power is supplied through the VBAT pins. When it works at EGSM900 mode and transmits current may reach the transient peak value of about 2.5 A. To make sure that the voltage does not decrease below 3.3V, a low-dropout (LDO) regulator or switch power with current output of more than 2.5 A is recommended for external power supply. Furthermore, it is recommended that customers add the 1000uF or above energy storage capacitor to connect in parallel at the power interface of the M2 module. And keep the power device and power cable away from antenna to avoid EMI interference. Figure 3 shows the recommended power circuit of M2 module using DC-DC power supply. The resistance accuracy of R3 and R4 is 1%. The capacitance E1 needs to use high polymer tantalum capacitor to add the drive capability of pulse current in dialing process. Figure 3 Recommended Power Circuit of the M2 module 1935 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 3.4 UART Interface Table 6 lists the UART interface signals. Table 6 UART interface signals Pin No. Pin name

-

I/O Typ.(V) Description UART_RXD UART_TXD UART_CTS UART_RTS DI DO DI DO 1.8V 1.8V 1.8V 1.8V Receive data Send data Clear to Send Ready for Receive 23 31 28 25 The M2 module is available with 1-wire hardware flow control UART (DSR and R1 signal are not supported), which supports 9600, 19200, 38400, 57600, 115200, 230400bps and the default value is 115200bps. Figure 4 shows the recommended power circuit of level match in the 3.3V power. Pay attention to the connection direction. The dotted circuit and full circuit can be used as reference to each other. MCU/ARM VDD_EXT 4.7 K 1 nF VDD_EXT 10 K 10 K 1 nF VCC_MCU 4.7 K VDD_EXT

/TXD

/RXD

/RTS

/CTS GND Voltage level: 3.3V Figure 4 Recommended Power Circuit of Level Match Module UART_RXD UART_TXD UART_RTS UART_CTS GND 2035 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 3.5 USIM Card Interface The signal definition of the M2 module USIM card interface is as below. Table 7 USIM card interface signals Pin No. Pin Name 8 USIM_VDD USIM_DATA USIM_CLK USIM_RST 10 12 14 I/O PO IO DO DO Typ.(V) Description 1.8V/3.0V Output Power supply for USIM card 1.8V/3.0V USIM/SIM Data 1.8V/3.0V USIM/SIM Clock 1.8V/3.0V USIM/SIM Reset The M2 module is available with 1.8V and 3.0V USIM/SIM card. Figure 5 shows the circuit of the 6-pin USIM card interface. Module GND USIM_VDD USIM_RST USIM_CLK USIM_DATA USIM_VDD 15 K 22 R 22 R 22 R 100 nF USIM VCC RST CLK GND VPP IO 33 pF33pF33pF 100 nF ESD GND GND Figure 5 Circuit of the 6-pin USIM Card Interface 2135 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 In order to enhance the reliability and availability of the USIM card, please pay attention to these key points:

1. The USIM socket should be placed near the USIM interface and it is recommend that PCB circuit connecting the USIM interface to the USIM socket does not exceed 200 mm. 2. Keep USIM card signal cable away from RF antenna and module power cable. 3. The decouple capacitor of USIM_VDD should be less than 1uF and placed near the USIM socket. 4. To avoid the mutual interference between USIM_DATA and USIM_CLK, keep them away with each other and shield them with surrounded ground including USIM_RST. 5. In order to ensure ESD protection in good performance, it is recommended to place the TVS with stray capacitance of less than 50pF near USIM card socket. 6. It is recommended to connect the 22 resistors to USIM_CLK, USIM_DATA and USIM_RST to avoid EMI interference and enhance ESD protection. Meanwhile, connecting the 33pF capacitor in parallel to filter interference from EGSM900 RF signals, and keep these components close to the USIM card socket. 7. USIM_DATA is pulled up internally, which is good for improving the anti-jamming capability. When the PCB circuit of USIM card is too long or the interference is nearby, the pull-up resistor is recommended to be placed close to the USIM socket. 3.6 USB Interface The Pin definition of the M2 module USB interface is as below. Table 8 Definition of the USB interface Pin No. Pin Name Pad Type Description Comment 36 USB_DM 38 USB_DP IO IO USB differential data Require differential bus(minus) impedance of 90ohm USB differential data Require differential bus(positive) impedance of 90ohm The M2 module is compliant with USB 2.0 High Speed Mode (480Mbps) and Full Speed Mode 12Mbps). And only can be used as slave device. The USB interface is mainly for AT commands, data transfer, catch log, and software upgrade. Figure 6 shows the circuit of the USB interface 2235 Module MCU uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 ESD Array R1 R2 R 0 0 R Close to Module USB_DM USB_DP GND Figure 6 Recommended Circuit of USB Interface USB_DM USB_DP GND In order to meet the requirement for completeness of USB signal trace, R1 and R2 shall be placed near the M2 module and ESD protection components. Based on the USB 2.0 specification, please comply with the following requirements:

1. It is required to control the differential impendence -90ohm. 2. Do not route the USB signal trace under the following components: crystals, oscillator, electromagnetic component and RF signal. Keep it away from interference sources and signals susceptible to disturbance and shielding with ground. 3. If the USB interface of the M2 module is connected to the USB socket, place ESD protection component with no more than of 2pF capacitance near the USB socket. 4. Avoid the coupled noise on the USB signal trace, keep the testing stubs as short as possible. If possible, add resistor of 0 ohm or common mode choke to the USB signal trace. 3.7 Signal Control Signal Table 9 lists the pins on the signal control interface. Table 9 Definition of the pins on the signal control interface Pin No. Pin Name Pad Type Typ.(V) Description 20 W_DISABLE#

DI 1.8V 22, 33 PERST#

DI 1.8V Disable RF communication, effective low level (inside pull up) Reset control, low level reset (internal pull up) 42 LED_WWAN#

OC Status Indication 2335 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 WAKEUP_IN DI 1.8V Sleep control pin (internal pull-down) WAKEUP_OUT DO 1.8V Sleep indication 19 32 3.7.1 W_DISABLE# Signal The W_DISABLE# signal can be used to disable the RF communication , which can controlled through hardware and software. Table 10 shows the operating status of radio frequency. Table 10 Operating status of radio frequency W_DISABLE#

High Level High Level Low Level 3.7.2 PERST# Signal RF status Enable RF Disable RF Disable RF PERST# signal can be used externally reset the module. PERST# 150~460ms can be pulled down to reset the module. PERST# signal is sensitive to interference, so keep the route on the module interface board as short as possible and shield with ground. VBAT PERST#

Module Status 460 ms ms 150 V IL 0.5V V IH 1.3V Running Resetting Restart Figure 7 Timing Sequence of Module Reset 2435 3.7.3 LED_WWAN# Signal uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 The LED_WWAN# signal interface is OC output format and the max current can reach up to the 40mA. When it connects to LED externally, connects the resistor in serial. You can adjust the LED brightness by adjusting the resistance of resistor. When it is low, the external LED lights up. Figure 8 shows the recommended circuit of the LED_WWAN# pin. LED_WWAN#

R VCC Figure 8 Driving Circuit Check the LED_WWAN# signal network status indicator as below, when the M2 module is successfully registered, the LED is on. When the RF is disabled, turned off or error (No SIM card or registration failed), the LED is off. Table 11 Network status indication LED_WWAN#

Description Low LevelLED is on Successfully registered High ImpedanceLED is off 1. No Internet or registration failed 1. W_DISABLE# pin is pulled down(disable RF) 3.7.4 WAKEUP_IN and WAKEUP_OUT Signal WAKEUP_IN pin is the authorization signal of the M2 module entering sleep mode. WAKEUP_OUT pin is used to wake up the external devices. Table 12 shows the definition of the WAKEUP_IN pin and WAKEUP_OUT signal. Table 12 WAKEUP_IN and WAKEUP_OUT pin Pin Name Description WAKEUP_IN H: DTE Wake up Module L: DTE Allows to enable sleep mode 2535 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 H: Wake-up mode is on, USB and serial port are available L: Wake-up is on, USB and serial port are not available WAKEUP_OUT 3.8 Antenna Interface The M2 module provides three antenna pads (WIFI BT antenna pad, main antenna pad and DIV antenna pad) for connecting the external antennas. Main Antenna Interface WIFI BT Antenna Interface DIV Antenna Interface Figure 9 Antenna Interface 3.8.1 Antenna Requirements Table 13 lists the requirements for main antenna, diversity antenna and WIFI/BT antenna. Table 13 Antenna requirements Type Requirements WIFI/BT/GPS GPS Frequency range:

1575.42MHz Polarization: RHCP or linear VSWR: < 2 (Typ.) Passive antenna gain: > 0dBi WIFI Frequency range:2412 - 2472Hz BT Frequency range:2402 - 2482Hz Passive antenna gain: > 0dBi VSWR: 2 Gain (dBi): 1 2635 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 GSM/

WCDMA/

Max input power (W): 50 Input resistance(ohm): 50 Polarization type: vertical TD-SCDMA/

Cable insertion loss: < 1dB LTE

(GSM900, WCDMA B8, LTE B8) Cable insertion loss: < 1.5dB Cable insertion loss: < 2dB 4 Electrical Interface and RF Specifications 4.1 About This Chapter This chapter describes the mainly gives the electrical interface and RF specifications of the M2 module, including:

Power Supply Ratings IO Interface Working Current RF Performance WIFI/BT Receiving Sensitivity ESD Feature 4.2 Power Supply Ratings M2 module comes with VBAT voltage with the input voltage 3.3~3.6V and the input power at least meets the requirement of 2.3A capacity. Table shows the power range of the M2 module. Table 14 Input Power Range Parameter Description Min. Typ. Max. Unit 2735 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 Module power supply 3.3 3.6 V VBAT 4.3 I/O Interface Table 15 shows the I/O interface of the M2 module. Table 15 I/O Interface Parameter Description Min. Max. Unit High Level Input Voltage 0.7*VDDIO1) VDDIO1)+0.3 Low Level Input Voltage

-0.3 0.3*VDDIO1) High Level Input Voltage VDDIO1)-0.5 VDDIO1) V V V Low Level Input Voltage 0 0.4 V VIH VIL VOH VOL Notes 1. The voltage of PERST# and W_DISABLE VIL(max) is 0.5V. 2. VDDIO voltage is 1.8V 4.4 RF Specifications Table 16 shows the RF output power and RF receiving sensitivity of the M2 module. Table 16 RF Output Power Band GSM900 DCS1800 Max 33dBm2dB 30dBm2dB GSM900 (8-PSK) 27dBm3dB DCS1800 (8-PSK) 26dBm3dB Min 5dBm5dB 0dBm5dB 5dBm5dB 0dBm5dB WCDMA B1/B8 24dBm+1/-3dB

<-49dBm 2835 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 LTE FDD B1/B3/B8 23dBm2dB LTE TDD B38/B39/B40/B41 23dBm2dB

<-39dBm

<-39dBm Table 17 RF Receiving Sensitivity Band Receiving Sensitivity(Typ.) Master set

+Diversity 3GPP(Main+Diversity) EGSM900

-109dBm DCS1800

-109dBm WCDMA Band1

-110dBm WCDMA Band8

-110dBm NA NA NA NA NA NA NA NA

-102dBm

-102dBm

-106.7dBm

-103.7dBm LTE-FDD B1(10M)

-97dBm

-97dBm

-101dBm

-96.3dBm LTE-FDD B3(10M)

-95dBm

-94dBm

-96dBm

-93.3dBm LTE-FDD B8(10M)

-94dBm

-94dBm

-97dBm

-93.3dBm LTE-TDD B38(10M)

-97dBm

-97dBm

-97.5dBm

-96.3dBm LTE-TDD B39(10M)

-97dBm

-97dBm

-102dBm

-96.3dBm LTE-TDD B40(10M)

-97dBm

-97dBm

-100dBm

-96.3dBm LTE-TDD B41(10M)

-96dBm

-96dBm

-98dBm

-94.3dBm 4.5 WIFI BT Receiving Sensitivity 2935 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 The WIFI/BT receiver is disabled by default. As the WIFI/BT antenna interface connects to the power 2.95V, it is recommended to use the active antenna suitable for the voltage. 4.6 Electrostatic Discharge Characteristics Table 18 lists the ESD (Electrostatic Discharge) characteristics of the M2 module. Table 18 Electrostatics discharge characteristics Parameter Contact Discharge Air Discharge Unit Power and grounding interface Antenna Interface USB Interface USIM Card Interface

+/-5

+/-4

+/-4

+/-4 Other Interface s

+/-0.5

+/-10

+/-8

+/-8

+/-8

+/-1 kV kV kV kV kV 3035 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 5 Mechanical Dimensions This chapter gives the mechanical dimensions of the M2 module, including:

Outer Dimension of the M2 module Standard dimension of Mini PCI Express 5.1. Outer Dimension of M2 Module Figure 10 Outer Dimension of M2 Module (Unit: mm) 5.2. Standard Dimension The M2 module comes with standard interfaces. 3135 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 Figure 11 Standard Dimension of Mini PCI Express (Unit: mm) Any qualified PCI Express Mini Card connectors are compatible with the M2 module. Figure 12 shows the connector 679100002 made of Molex Company. Figure 12 Mini PCI Express Connector (Unit: mm) 3235 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 6 Appendix Terms and Abbreviation Table 19 Terms and Abbreviation Abbr. 8-PSK bps CS CSD CTS DCE DL DTE DTR EMC ESD FDD GLONASS GMSK GNSS GPS GSM HSPA Description 8-Phase Shift Keying Bits Per Second Coding Scheme Circuit Switched Data Clear To Send Data Communications Equipment (typically module) Down Link Data Terminal Equipment (typically computer, external controller) Data Terminal Ready Electromagnetic Compatibility Electrostatic Discharge Frequency Division Duplexing GLObalnayaNAvigatsionnayaSputnikovaya Sistema, the Russian Global Navigation Satellite System Gaussian Minimum Shift Keying Global Navigation Satellite System Global Positioning System Global System for Mobile Communications High Speed Packet Access 3335 PAD TYPE Input/Output uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 kbps LED LTE Mbps MCS ME MMS MO MS MT PAP PDU PPP RF RX SIM SMS TDD KiloBitsPer Second Light Emitting Diode Long Term Evolution Million Bits Per Second Modulation and Coding Scheme Mobile Equipment Multimedia Messaging Service Mobile Originated Mobile Station (GSM engine) Mobile Terminated Password Authentication Protocol Protocol Data Unit Point-to-Point Protocol Radio Frequency Receive Direction Subscriber Identification Module Short Message Service Time Division Duplexing TD-SCDMA Time Division-Synchronous Code Division Multiple Access TE TTFF TX UART UL UMTS Terminal Equipment Time to First Fix Transmitting Direction Universal Asynchronous Receiver & Transmitter Up Link Universal Mobile Telecommunications System 3435 uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0 URC Unsolicited Result Code USSD WCDMA Unstructured Supplementary Service Data Wideband Code Division Multiple Access FCC Statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two NOTICE:

conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Please notice that if the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following:

Contains FCC ID:2AC88-GLMM18A02 any similar wording that expresses the same meaning may be used. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator & your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. The module is limited to OEM installation ONLY. The OEM integrator is responsible for ensuring that the end-user has no manual instruction to remove or install module. The module is limited to installation in mobile application. A separate approval is required for all other operating configurations, including portable configurations with respect to Part 2.1093 and difference antenna configurations. There is requirement that the grantee provide guidance to the host manufacturer for compliance with Part 15B requirements. The finished product is required to comply with all applicable FCC equipment authorisations, regulati-

ons and qequipment. We will provide guidance to the host manufacturer for conpliance with the FCC part 15B requiremnets. The OEM integrator is responsible for ensuring that the end-user has no manual instructions to rem-

ove or install module. The module is limited to installation in mobile or fixed application. 3535