UCLOUDLINK NETWORK TECHNOLOGY GLMM18A02 LTE MODULE User Manual

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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
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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 world’s 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 SIMfree 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
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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
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
Revision History
Revision
Date
1.0
2018/05/22
Author
Max Wei
Ji Yongshun
Description
Initial Release
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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
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
Mechanical Dimensions ........................................................................................................ 31
5.1. Outer Dimension of M2 Module ...........................................................................................31
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
5.2. Standard Dimension ..............................................................................................................31
Appendix Terms and Abbreviation ........................................................................................ 33
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
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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
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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.
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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
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
Name
uCloudlink M2 Mini PCIe-C
Description
LTE-FDD: B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B19/B20/B26/B28
TDD-LTE: B34/B38/B39/B40/B41
WCDMA: B1/B2/B4/B5/B8
GSM850/900/1800 /1900
２．４Ｇ ＷｉＦｉ：８０２．１１ 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 (33dBm±2dB) for GSM900
Class 1 (30dBm±2dB) for DCS1800
Class E2 (27dBm±3dB) for GSM900 8-PSK
Class E2 (26dBm±3dB) for DCS1800 8-PSK
Output Power
Class 3 (24dBm+1/-3dB) for WCDMA bands
Class 3 (23dBm±2dB) for LTE FDD bands
Class 3 (23dBm±2dB) for LTE TDD bands
Up to non-CA CAT7
Support 1.4~20MHz RF bandwidth
LTE
Support downlink multi-user MIMO
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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
GSM/GPRS/EDGE
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
Support different modulation and encoding of GMSK and 8-PSK
Support uplink and downlink encoding CS 1-4 and MCS 1-9
Support TCP/UDP/PPP/FTP/HTTP/SMTP/MMS/NTP/PING/QMI
Internet Protocol
Support PAP (Password Authentication Protocol) and CHAP
(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
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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
Antenna Interface
WIFI
Compliant with 3GPP TS 27.007, 27.005 and enhanced AT commands
Support main antenna pad, diversity antenna pad and WIFI/BT antenna
pad
Protocol: 802.11 b/g/n
Dimension and weight
Operating Temperature
Dimensions (L x W x H): 51.0 mm ×3 0.0 mm×4 .9 mm
Weight: about 11 g
Normal operating temperature: -30°C ~+75°C 1)
Extended operating temperature: -40°C ~ +85°C 2)
Firmware upgrade
USB interface or DFOTA interface
RoHS
All hardware components meet the EU RoHS standard
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 won’t occur; radio spectrum and network won’t 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.
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
2.4 Function Overview
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
Mini PCI Express Interface
Antenna
UART
Main
Antenna
WIFI BT
USB
USIM
uCloudlink
M2 Mini
PCIe-C
Antenna
Interface
Antenna
Interface
Antenna
Diversity
Antenna
WAKEUP_IN
WAKEUP_OUT
W_DISABLE#
PERST#
LED_WWAN#
Figure 1 Functional Diagram
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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
Description
IO
Bidirectional input/output
DI
Digital Input
DO
Digital Output
AI
Analog Input
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
AO
Analog Output
PI
Power Input
PO
Power Output
OC
Open Collector
Table 4 Definition of pins on the M2 module
Pin No.
Status
Pin Name
I/O
Description
WAKE#
MIC_P*
AI
3.3Vaux
VBAT
PI
COEX1
MIC_N*
AI
GND
GND
COEX2
SPK_P*
AO
1.5V
NC
—
CLKREQ#
SPK_N*
AO
UIM_PWR
USIM_VDD
PO
GND
GND
10
UIM_DATA
USIM_DATA
IO
USIM data signal
11
REFCLK-
VDD_EXT
PO
1.8V Power Output
Note
Audio
Input(Positive)
Power Input
Audio
Input(Negative)
Ground
Audio
Output(Positive)
—
Audio
Output(Negative)
USIM Power
Output
Ground
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
12
UIM_CLK
USIM_CLK
DO
USIM Clock Signal
13
REFCLK+
RESERVED
—
Reserved
14
UIM_RESET
USIM_RST
DO
USIM Reset Signal
15
GND
GND
16
UIM_VPP
RESERVED
—
Reserved
17
RESERVED
RESERVED
—
Reserved
18
GND
GND
19
RESERVED
WAKEUP_IN
Ground
Ground
DI
DI
Module Sleep
Control Pin
Disable RF
20
W_DISABLE#
W_DISABLE#
21
GND
GND
22
PERST#
PERST#
DI
23
PERn0
UART_RXD
DI
24
3.3Vaux
VBAT
PI
25
PERp0
UART_RTS
DO
26
GND
GND
Ground
27
GND
GND
Ground
28
1.5V
UART_CTS
Communication
Allows to
sleep when
low level
Valid when
low level
Ground
DI
Reset Control Pin
Valid when
low level
Module receiving
end
Power Input
Module request
to send
Module request
to delete
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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
33
PETp0
PERST#
DI
34
GND
GND
Ground
35
GND
GND
Ground
36
USB_D-
USB_DM
37
GND
GND
38
USB_D+
USB_DP
IO
USB Differential Signal (+)
39
3.3Vaux
VBAT
PI
Power Input
40
GND
GND
41
3.3Vaux
VBAT
PI
Power Input
42
LED_WWAN#
LED_WWAN#
OC
Status Light Indication
43
GND
GND
44
LED_WLAN#
RESERVED
—
Reserved
45
RESERVED
RESERVED
—
Reserved
46
LED_WPAN#
UART_DTR
DI
DTE is ready
47
RESERVED
RESERVED
—
Reserved
48
1.5V
NC
—
—
49
RESERVED
RESERVED
—
Reserved
50
GND
GND
51
RESERVED
RESERVED
IO
Module Carrier
Sense
Module sending
end
Module Sleep
Indication
Reset Control Pin
Valid when
low level
USB Differential Signal (-)
Ground
Ground
Ground
Ground
—
Reserved
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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
USIM interface is available with 1.8V and 3.0V.
2.
Please suspend all of NC, RESERVED and unused pins.
3.
“*” indicates the audio feature is not available and reserved function.
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.
Figure 2 Pin Assignment (Top View)
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
3.3 Power Interface
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
PI
3.3~3.6V Power Input
4, 9, 15, 18, 21,
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
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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
23
UART_RXD
31
- I/O
Typ.(V)
Description
DI
1.8V
Receive data
UART_TXD
DO
1.8V
Send data
28
UART_CTS
DI
1.8V
Clear to Send
25
UART_RTS
DO
1.8V
Ready for Receive
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.
4.7 K
VDD_EXT
VDD_EXT
1 nF
MCU/ARM
Module
10 K
/TXD
UART_RXD
/RXD
UART_TXD
10 K
VCC_MCU
1 nF
VDD_EXT
4.7 K
/RTS
UART_RTS
/CTS
UART_CTS
GND
GND
Voltage level: 3.3V
Figure 4 Recommended Power Circuit of Level Match
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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
I/O
Typ.(V)
USIM_VDD
PO
Description
1.8V/3.0V
Output Power supply for
USIM card
10
USIM_DATA
IO
1.8V/3.0V
USIM/SIM Data
12
USIM_CLK
DO
1.8V/3.0V
USIM/SIM Clock
14
USIM_RST
DO
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.
USIM_VDD
100 nF
Module
15 K
USIM 卡座
GND
USIM_VDD
USIM_RST
USIM_CLK
USIM_DATA
22 R
22 R
VCC
GND
RST
VPP
CLK
IO
22 R
33 pF33pF33pF
100 nF
ESD
GND
GND
Figure 5 Circuit of the 6-pin USIM Card Interface
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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 22Ω 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
36
USB_DM
IO
38
USB_DP
IO
Description
Comment
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
22／35
uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
MCU
Module
ESD Array
USB_DM
USB_DP
R1
0R
USB_DM
R2
0R
USB_DP
Close to Module
GND
GND
Figure 6 Recommended Circuit of USB Interface
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.
20
Pin Name
W_DISABLE#
Pad Type
Typ.(V)
DI
1.8V
22, 33
PERST#
DI
1.8V
42
LED_WWAN#
OC
—
Description
Disable RF communication, effective
low level (inside pull up)
Reset control, low level reset (internal
pull up)
Status Indication
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
19
WAKEUP_IN
DI
1.8V
Sleep control pin (internal pull-down)
32
WAKEUP_OUT
DO
1.8V
Sleep indication
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#
RF status
High Level
Enable RF
High Level
Disable RF
Low Level
Disable RF
3.7.2 PERST# Signal
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
460ms
150ms
VIH ≥ 1.3V
PERST#
Module
Status
VIL ≤ 0.5V
Running
Resetting
Restart
Figure 7 Timing Sequence of Module Reset
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
3.7.3 LED_WWAN# Signal
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#
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 Level（LED is on）
Successfully registered
1. No Internet or registration failed
High Impedance（LED is off）
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
H: DTE Wake up Module
WAKEUP_IN
L: DTE Allows to enable sleep mode
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
H: Wake-up mode is on, USB and serial port are available
WAKEUP_OUT
L: Wake-up is on, USB and serial port are not available
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
GPS Frequency range:
1575.42MHz
Polarization: RHCP or linear
VSWR: < 2 (Typ.)
Passive antenna gain: > 0dBi
WIFI/BT/GPS
WIFI Frequency range:2412 - 2472Hz
BT Frequency range:2402 - 2482Hz
Passive antenna gain: > 0dBi
VSWR: ≤ 2
Gain (dBi): 1
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
Max input power (W): 50
GSM/
Input resistance(ohm): 50
WCDMA/
Polarization type: vertical
TD-SCDMA/
Cable insertion loss: < 1dB
LTE
(GSM900, WCDMA B8, LTE B8)
Cable insertion loss: < 1.5dB
Cable insertion loss: < 2dB
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
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
Module power
VBAT
supply
3.3
3.6
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
VIH
High Level Input Voltage
0.7*VDDIO1)
VDDIO1)+0.3
VIL
Low Level Input Voltage
-0.3
0.3*VDDIO1)
VOH
High Level Input Voltage
VDDIO1)-0.5
VDDIO1)
VOL
Low Level Input Voltage
0.4
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
Max
Min
GSM900
33dBm±2dB
5dBm±5dB
DCS1800
30dBm±2dB
0dBm±5dB
GSM900 (8-PSK)
27dBm±3dB
5dBm±5dB
DCS1800 (8-PSK)
26dBm±3dB
0dBm±5dB
WCDMA B1/B8
24dBm+1/-3dB
<-49dBm
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
LTE FDD B1/B3/B8
23dBm±2dB
<-39dBm
LTE TDD B38/B39/B40/B41
23dBm±2dB
<-39dBm
Table 17 RF Receiving Sensitivity
Band
Receiving
Master set
Sensitivity(Typ.)
+Diversity
3GPP(Main+Diversity)
EGSM900
-109dBm
NA
NA
-102dBm
DCS1800
-109dBm
NA
NA
-102dBm
WCDMA Band1
-110dBm
NA
NA
-106.7dBm
WCDMA Band8
-110dBm
NA
NA
-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
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
-96.3dBm
4.5 WIFI BT Receiving Sensitivity
29／35
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
+/-5
+/-10
kV
Antenna Interface
+/-4
+/-8
kV
USB Interface
+/-4
+/-8
kV
USIM Card Interface
+/-4
+/-8
kV
Other Interface s
+/-0.5
+/-1
kV
Power and grounding
interface
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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.
31／35
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)
32／35
uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
6 Appendix Terms and Abbreviation
Table 19 Terms and Abbreviation
Abbr.
Description
8-PSK
8-Phase Shift Keying
bps
Bits Per Second
CS
Coding Scheme
CSD
Circuit Switched Data
CTS
Clear To Send
DCE
Data Communications Equipment (typically module)
DL
Down Link
DTE
Data Terminal Equipment (typically computer, external controller)
DTR
Data Terminal Ready
EMC
Electromagnetic Compatibility
ESD
Electrostatic Discharge
FDD
Frequency Division Duplexing
GLObalnayaNAvigatsionnayaSputnikovaya Sistema, the Russian Global
GLONASS
Navigation Satellite System
GMSK
Gaussian Minimum Shift Keying
GNSS
Global Navigation Satellite System
GPS
Global Positioning System
GSM
Global System for Mobile Communications
HSPA
High Speed Packet Access
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uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
PAD TYPE
Input/Output
kbps
KiloBitsPer Second
LED
Light Emitting Diode
LTE
Long Term Evolution
Mbps
Million Bits Per Second
MCS
Modulation and Coding Scheme
ME
Mobile Equipment
MMS
Multimedia Messaging Service
MO
Mobile Originated
MS
Mobile Station (GSM engine)
MT
Mobile Terminated
PAP
Password Authentication Protocol
PDU
Protocol Data Unit
PPP
Point-to-Point Protocol
RF
Radio Frequency
RX
Receive Direction
SIM
Subscriber Identification Module
SMS
Short Message Service
TDD
Time Division Duplexing
TD-SCDMA
Time Division-Synchronous Code Division Multiple Access
TE
Terminal Equipment
TTFF
Time to First Fix
TX
Transmitting Direction
UART
Universal Asynchronous Receiver & Transmitter
UL
Up Link
UMTS
Universal Mobile Telecommunications System
34／35
uCloudlink M2 Mini PCIe-C _Hardware Design Guide_V1.0
URC
Unsolicited Result Code
USSD
Unstructured Supplementary Service Data
WCDMA
Wideband Code Division Multiple Access
ＦＣＣ Ｓｔａｔｅｍｅｎｔ
NOTICE: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
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, regulations 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 remove or install module.
The module is limited to installation in mobile or fixed application.
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