Quectel EC25 Mini PCIe LTE module Hardware Design
The EC25 Mini PCIe is a LTE module that provides data connectivity on FDD-LTE, TDD-LTE, WCDMA and GSM networks with PCI Express Mini Card 1.2 standard interface. It can be used for a wide range of applications, including PDA and Laptop Computer, Remote Monitor System, Vehicle System, Wireless POS System, Intelligent Meter Reading System, Wireless Router and Switch, and other Wireless Terminal Devices.
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EC25 Mini PCIe
Hardware Design
LTE Module Series
Rev. EC25_Mini_PCIe_Hardware_Design_V1.0
Date: 2016-06-07 www.quectel.com
LTE Module Series
EC25 Mini PCIe Hardware Design
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Quectel Wireless Solutions Co., Ltd.
Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233
Tel: +86 21 5108 6236
Email: [email protected]
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GENERAL NOTES
QUECTEL OFFERS THE INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION
PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT
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CHANGE WITHOUT PRIOR NOTICE.
COPYRIGHT
THE INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF
Confidential
OR DESIGN.
Copyright © Quectel Wireless Solutions Co., Ltd. 2016. All rights reserved.
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About the Document
History
Revision Date
1.0 2016-06-07
Author
Mountain ZHOU/
Frank WANG
Description
Initial
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Contents
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Table Index
TABLE 18: CONDUCTED RF RECEIVING SENSITIVITY OF EC25-AUT MINI PCIE ............................. 31
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Figure Index
FIGURE 8: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .............................. 24
FIGURE 17: DIMENSIONS OF THE MINI PCI EXPRESS CONNECTOR (UNIT: MM) ........................... 36
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1
Introduction
This document defines EC25 Mini PCIe module, and describes its hardware interfaces which are connected with your application as well as its air interfaces.
This document can help you to quickly understand the interface specifications, electrical and mechanical details as well as other related information of EC25 Mini PCIe module. To facilitate its application in different fields, relevant reference design documents are also provided. Associated with application notes and user guide of EC25 Mini PCIe module, you can use the module to design and set up mobile applications easily.
1.1. Safety Information
The following safety precautions must be observed during all phases of the operation, such as usage, service or repair of any cellular terminal or mobile incorporating EC25 Mini PCIe module. Manufacturers liability for customers
Quectel
Full attention must be given to driving at all times in order to reduce the risk of an accident. Using a mobile while driving (even with a handsfree kit) causes distraction and can lead to an accident. You must comply with laws and regulations restricting the use of wireless devices while driving.
Confidential the use of wireless devices on boarding the aircraft, if your device offers an
Airplane Mode which must be enabled prior to boarding an aircraft.
Switch off your wireless device when in hospitals, clinics or other health care facilities. These requests are desinged to prevent possible interference with sentitive medical equipment.
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Cellular terminals or mobiles operating over radio frequency signal and cellular network cannot be guaranteed to connect in all conditions, for example no mobile fee or with an invalid SIM card. While you are in this condition and need emergent help, please remember using emergency call. In order to make or receive a call, the cellular terminal or mobile must be switched on and in a service area with adequate cellular signal strength.
Your cellular terminal or mobile contains a transmitter and receiver. When it is ON, it receives and transmits radio frequency energy. RF interference can occur if it is used close to TV set, radio, computer or other electric equipment.
In locations with potencially explosive atmospheres, obey all posted signs to turn off wireless devices such as your phone or other cellular terminals. Areas with potencially explosive atmospheres include fuelling areas, below decks on boats, fuel or chemical transfer or storage facilities, areas where the air contains chemicals or particles such as grain, dust or metal powders, etc.
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2
Product Concept
2.1. General Description
EC25 Mini PCIe module provides data connectivity on FDD-LTE, TDD-LTE, WCDMA and GSM networks with PCI Express Mini Card 1.2 standard interface. It supports embedded operating system such as
WinCE, Linux, Android, etc., and also provides audio, high-speed data transmission and GNSS functionalities for your applications.
EC25 Mini PCIe module can be applied in the following fields:
PDA and Laptop Computer
Remote Monitor System
Vehicle System
Wireless POS System
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This chapter generally introduces the following aspects of EC25 Mini PCIe module:
Product Series
Key Features
Functional Diagram
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EC25 Mini PCIe contains Telematics version and Data-Only version. Telematics version supports voice and data functions, while Data-Only version only supports data function.
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2.2. Description of Product Series
The following table shows the product series of EC25 Mini PCIe module.
Table 1: Description of EC25 Mini PCIe
Product Series Description
EC25-A Mini PCIe
EC25-AUT Mini PCIe
Support WCDMA: B2/B5
Support LTE FDD: B2/B4/B12
Support LTE/WCDMA receive diversity
Support GNSS
1)
Support digital audio
2)
Support WCDMA: B1/B5
Support LTE FDD: B1/B3/B5/B7/B28
Support LTE/WCDMA receive diversity
Support GNSS
1)
Support digital audio
2)
Support GSM: 900/1800MHz
EC25-E Mini PCIe
Support WCDMA: B1/B5/B8
Support LTE FDD: B1/B3/B5/B7/B8/B20
Quectel
Support LTE FDD: B4/B13
Support LTE receive diversity
1.
2.
EC25-V Mini PCIe
NOTES
Support digital audio
2)
SS
GNSS function is optional.
1)
Support GNSS
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2)
Digital audio (PCM) function is only supported in Telematics version.
2.3. Key Features
The following table describes the detailed features of EC25 Mini PCIe module.
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Table 2: Key Features of EC25 Mini PCIe
Feature Details
Function Interface PCI Express Mini Card 1.2 Standard Interface
Power Supply
Transmitting Power
LTE Features
WCDMA Features
Supply voltage: 3.0~3.6V
Typical supply voltage: 3.3V
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
Class 3 (24dBm+1/-3dB) for WCDMA bands
Class 3 (23dBm±2dB) for LTE FDD and TDD bands
Support up to non-CA CAT4
Max 150Mbps (DL), Max 50Mbps (UL)
Support up to DC-HSPA+
Max 42Mbps (DL), Max 5.76Mbps (UL)
R99: CS data: 9.6k, 14.4kbps
GPRS: Support GPRS multi-slot class 12 (12 by default)
Coding scheme: CS-1, CS-2, CS-3 and CS-4
GSM Features
Maximum of four Rx time slots per frame
EDGE: Support EDGE multi-slot class 12 (12 by default)
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Support TCP/UDP/PPP/FTP
1)
FILE
1)
/CMUX
1)
/QMI protocols
/HTTP
1)
/SMTP
1)
/MMS
1)
/NTP/PING/DTMF
1)
/
Internet Protocol Features
SMS
Support the protocols PAP (Password Authentication Protocol) and CHAP
(Challenge Handshake Authentication Protocol) usually used for PPP connections
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USIM Interface
SMS storage: ME by default
Support USIM/SIM card: 1.8V, 3.0V
UART Interface
Audio Feature
1)
Baud rate can reach up to 230400bps, 115200bps by default
Used for AT command
Support one digital audio interface: PCM interface
GSM: HR/FR/EFR/AMR/AMR-WB
WCDMA: AMR/AMR-WB
LTE: AMR/AMR-WB
Support echo cancellation and noise suppression
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PCM Interface
1)
USB Interface
Antenna Interface
Support 8-bit Alaw, μ-law and 16-bit linear data formats
Support long frame sync and short frame sync
Support master and slave mode, but must be the master in long frame sync
Compliant with USB 2.0 specification (slave only); the data transfer rate can reach up to 480Mbps
Used for AT command communication, data transmission, firmware upgrade, software debugging and GNSS NMEA output
USB Driver: Windows XP, Windows Vista, Windows 7, Windows 8/8.1,
Window CE 5.0/6.0/7.0, Linux 2.6 or later, Android 2.3/4.0/4.2/4.4/5.0
Include main antenna, diversity antenna and GNSS antenna
Rx-diversity Support LTE/WCDMA Rx-diversity
GNSS Features
1)
IZat Gen 8C of Qualcomm (GPS, GLONASS, BeiDou, Galileo, QZSS)
Protocol: NMEA 0183
AT Commands
Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT commands
Size: 51.0±0.1 × 30.0±0.1 × 4.9±0.2 mm
Physical Characteristics
Weight: approx. 9.8g
2.
3.
Operation temperature range: -35℃ ~ +75℃
2)
Temperature Range
RoHS
NOTES
1.
Extended temperature range: -40℃ ~ +85℃
3)
USB interface and DFOTA
1)
Firmware Upgrade
Quectel
1)
These functions are under development.
2)
Within operating temperature range, the module is 3GPP compliant.
3)
Within extended temperature range, the module remains the ability to establish and maintain a
P out voice, SMS, data transmission, emergency call, etc. There is no unrecoverable malfunction; there are
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2.4. Functional Diagram
The following figure shows the block diagram of EC25 Mini PCIe.
VCC VBAT
USB
PCM&I2C
UART
USIM
Boost
Circuit
EC25
Module
Main
Antenna
Interface
GNSS
Antenna
Interface
Diversity
Antenna
Interface
W_DISABLE#
PERST#
DTR
WAKE#
RI
LED_WWAN#
Figure 1: Functional Diagram
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Main
Antenna
GNSS
Antenna
Diversity
Antenna
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3
Application Interface
DI
DO
OC
PI
3.1. General Description
The physical connections and signal levels of EC25 Mini PCIe comply with PCI Express Mini CEM specifications. This chapter mainly describes the following interfaces
’ definition and application of EC25
Mini PCIe:
Power supply
USIM interface
USB interface
UART interface
PCM&I2C interface
Control signals
Antenna interface
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3.2.1. Definition of Interface
application.
Type
IO
The following tables show the pin definition and pin assignment of EC25 Mini PCIe on the 52-pin
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Description
Bidirectional input/output
Digital input
Digital output
Open collector
Power input
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Power output PO
Table 4: Description of Pins
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Description Comment Pin No.
Mini PCI Express
Standard Name
EC25 Mini PCIe
Pin Name
I/O
WAKE# WAKE# OC
3.3Vaux VCC_3V3
Output signal can be used to wake up the host.
3.3V DC supply
COEX1 RESERVED
PI
—
Reserved
GND
COEX2
W_DISABLE#
GND
GND
RESERVED
W_DISABLE# DI
Mini Card ground
—
—
Reserved
—
1.5V NC
CLKREQ# RESERVED Reserved
—
GND
UIM_PWR
GND
UIM_DATA
REFCLK-
USIM_VDD
GND
USIM_DATA
UART_RX
PO
IO
DI
Power source for the
USIM/SIM card
Mini Card ground
USIM/SIM data signal
UART receive data
UIM_CLK USIM_CLK DO USIM/SIM clock signal
Connect to
DTE’s TX
REFCLK+
GND
UIM_VPP RESERVED
—
Reserved
Connect to
UIM_RESET
UART_TX
USIM_RST
GND
DO
DO
UART transmit data
USIM/SIM reset signal
Mini Card ground
DTE’s RX
RESERVED RI DO
Output signal can be used to wake up the host.
GND Mini Card ground
—
RESERVED RESERVED Reserved
Disable wireless communications
Mini Card ground
Pull-up,
Active low
GND
PERST# PERST# DI Functional reset to the card Active low
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31
32
37
38
39
40
41
33
34
35
36
42
43
44
45
23
24
25
26
27
28
29
30
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PERn0
3.3Vaux
PERp0
GND
GND
1.5V
UART_CTS
RESERVED
UART_RTS
GND
GND
NC
DI
—
DO
—
UART clear to send
Reserved
UART request to send
Mini Card ground
Mini Card ground
—
Connect to
DTE’s RTS
Connect to
DTE’s CTS
GND
SMB_CLK
GND
I2C_SCL DO
Mini Card ground
I2C serial clock
Require external pull-up to
1.8V
PETn0 DTR DI Sleep mode control
SMB_DATA I2C_SDA IO I2C serial data
GND
PETp0
GND
GND
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Reserved
Mini Card ground
Mini Card ground
USB_D- USB_DM IO USB differential data (-)
USB_D+
GND
USB_DP
VCC_3V3
GND
IO
PI
Mini Card ground
USB differential data (+)
3.3V DC supply
Mini Card ground
3.3Vaux
GND
Require external pull-up to
1.8V
3.3Vaux VCC_3V3 PI
LED_WWAN#
GND
LED_WLAN#
RESERVED
LED_WWAN#
GND
RESERVED
PCM_CLK*
OC
—
IO
3.3V DC supply
Active-low LED signal for indicating the state of the card
Mini Card ground
Reserved
PCM clock signal
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46
47
48
49
LED_WPAN#
RESERVED
1.5V
RESERVED
RESERVED
PCM_DOUT*
NC
PCM_DIN*
—
DO
—
DI
Reserved
PCM data output
—
PCM data input
50
51
GND
RESERVED
GND
PCM_SYNC* IO
Mini Card ground
PCM frame sync
52
NOTES
3.3Vaux VCC_3V3 PI 3.3V DC supply
1. Keep all NC, reserved and unused pins unconnected.
2.
“*” means the digital audio (PCM) function is only supported on Telematics version.
3.2.2. Pin Assignment
The following figure shows the pin assignment of EC25 Mini PCIe module. The top side contains EC25 module and antenna connectors.
Quectel
PIN1
PIN2
TOP
BOT
PIN51
Figure 2: Pin Assignment
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3.3. Power Supply
The following table shows pin definition of VCC_3V3 pins and ground pins.
Table 5: VCC_3V3 and GND Pin Definition
Pin No.
Pin Name
I/O
2, 39, 41, 52 VCC_3V3 3.3V DC supply
GND Mini Card ground
4, 9, 15, 18, 21,
26, 27, 29, 34, 35,
37, 40, 43, 50
The typical supply voltage of EC25 Mini PCIe is 3.3V. In the 2G networks, the input peak current may reach to 2.7A during the transmitting time. Therefore, the power supply must be able to provide enough current, and a bypass capacitor of no less than 470µF with low ESR should be used to prevent the voltage from dropping.
The following figure shows a reference design of power supply. The precision of resistor R2 and R3 is 1%, and the capacitor C3 needs a low ESR.
LDO_IN
C1
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C2
VCC_3V3
D1
TVS
470uF 100nF
R1
51K
R2
82K 1%
R4
C3
C4 C5 C6
MCU_POWER
_ON/OFF
R5
4.7K
R6
47K
R3
47K 1%
470R 470uF
100nF 33pF 10pF
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Figure 3: Reference Design of Power Supply
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3.4. USIM Card Interface
The following table shows the pin definition of the USIM card interface.
Table 6: USIM Pin Definition
Pin No.
8
10
Pin Name
USIM_VDD
USIM_DATA
I/O
IO 1.8V/3.0V USIM/SIM data signal
12 USIM_CLK DO 1.8V/3.0V USIM/SIM clock signal
14 USIM_RST USIM/SIM reset signal
EC25 Mini PCIe supports 1.8V and 3.0V USIM cards. The following figure shows a reference design for a
6-pin USIM connector.
100nF
Module
USIM_VDD
15K
GND
USIM_VDD
USIM_RST
USIM_CLK
USIM_DATA
Quectel
22R
USIM Connector
VCC
RST
CLK
GND
VPP
IO
33pF 33pF 33pF 33pF
GND
Figure 4: Reference Circuit for a 6-Pin USIM Connector
In order to enhance the reliability and availability of the USIM card in your application, please follow the criteria below in the USIM circuit design:
Keep layout of USIM card as close to the module as possible. Keep the trace length as less than
200mm as possible.
Keep USIM card signal away from RF and power supply alignment.
Keep the width of ground and USIM_VDD no less than 0.5mm to maintain the same electric potential.
The decouple capacitor of USIM_VDD should be less than 1uF and must near to USIM connector.
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To avoid cross-talk between USIM_DATA and USIM_CLK, keep them away from each other and shield them with surrounded ground.
In order to offer good ESD protection, it is recommended to add a TVS whose parasitic capacitance should be not more than 50pF. The 22ohm resistors should be added in series between the module and the USIM card so as to suppress the EMI spurious transmission and enhance the ESD protection. The 33pF capacitors are used for filtering interference of GSM900. Please note that the
USIM peripheral circuit should be close to the USIM connector.
The pull-up resistor on USIM_DATA line can improve anti-jamming capability when long layout trace and sensitive occasion are applied, and should be placed close to the connector.
3.5. USB Interface
The following table shows the pin definition of USB interface.
Table 7: USB Pin Definition
36
38
Pin No.
Pin Name
I/O Description
USB_DM IO
USB_DP IO
USB differential data (-)
USB differential data (+)
Comment
Require differential impedance of 90Ω
Require differential impedance of 90Ω it supports high speed (480Mbps) mode and full speed (12Mbps) mode. The USB interface is used for AT command communication, data transmission, GNSS NMEA output, software debugging and firmware upgrade. The following figure shows a reference circuit of USB interface.
Test Points
Minimize this stub
Module MCU
R4
NM_0R
NM_0R
ESD Array
USB_DM
USB_DP
GND
R1
R2
0R
0R
Close to Module
USB_DM
USB_DP
GND
Figure 5: Reference Circuit of USB Interface
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The component R1, R2, R3 and R4 must be placed close to module, and then these resistors should be placed close to each other. The extra stubs of trace must be as short as possible.
In order to ensure the USB interface design corresponding with the USB 2.0 specification, please comply with the following principles:
It is important to route the USB signal traces as differential pairs with total grounding. The impedance of USB differential trace is 90ohm.
Do not route signal traces under crystals, oscillators, magnetic devices or RF signal traces. It is important to route the USB differential traces in inner-layer with ground shielding, and not only upper and lower layer but also right and left side should be shielded.
If you use the USB connector, you should keep the ESD components as close to the USB connector as possible. Pay attention to the influence of junction capacitance of ESD component on USB data lines. Typically, the capacitance value should be less than 1pF.
Keep USB data test points traces short to avoid noise coupled on USB data lines. If possible, reserve
0R resistor on these two lines.
NOTES
S
There are three preconditions when enabling EC25 Mini PCIe to enter into the sleep mode:
1. Execute AT command AT+QSCLK=1 to enable the sleep mode. Refer to document [2].
2. DTR pin should be kept in high level (pull-up internally).
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3.6. UART Interface
The following table shows the pin definition of the UART interface.
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Pin No.
EC25 Mini PCIe Pin Name
I/O
11 UART_RX UART receive data
13 UART_TX UART transmit data
23 UART_CTS DI 3.3V UART clear to send
25 UART_RTS DO 3.3V UART request to send
The UART interface supports 9600, 19200, 38400, 57600, 115200 and 230400bps baud rate. The default
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is 115200bps. This interface can be used for AT command communication.
NOTE
AT command AT+IPR is used to set the baud rate of the UART, and AT command AT+IFC is used to set the hardware flow control (hardware flow control is disabled by default). Please refer to document [2] for details.
3.7. PCM and I2C Interface
The following table shows the pin definition of PCM interface that can be applied in audio codec design.
Table 9: PCM and I2C Pin Definition
Pin No. Pin Name
45
47
49
51
30
PCM_CLK
I/O
IO
Power Domain
1.8V
PCM_DOUT
PCM_DIN
PCM_SYNC
DO
DI
IO
1.8V
1.8V
I2C_SCL DO 1.8V
Description
PCM clock signal
PCM data output
PCM data input
PCM frame sync
I2C serial clock, require external pull-up to 1.8V
I2C serial data, require external pull-up to 1.8V
32 I2C_SDA IO 1.8V data formats and the following modes:
Primary mode (short sync, works as either master or slave)
Auxiliary mode (long sync, works as master only)
In primary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising edge; the PCM_SYNC falling edge represents the MSB. In this mode, PCM_CLK supports 128, 256, 512,
1024 and 2048kHz for different speed codecs. The following figure shows the timing relationship in primary mode with 8kHz PCM_SYNC and 2048kHz PCM_CLK.
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125us
PCM_CLK 1 2 255 256
PCM_SYNC
MSB LSB MSB
PCM_DOUT
MSB
MSB LSB
PCM_DIN
Figure 6: Timing in Primary Mode
In auxiliary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising edge; while the PCM_SYNC rising edge represents the MSB. In this mode, PCM interface operates with a
128kHz PCM_CLK and an 8kHz, 50% duty cycle PCM_SYNC only. The following figure shows the timing relationship in auxiliary mode with 8kHz PCM_SYNC and 128kHz PCM_CLK.
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PCM_SYNC
15 16
PCM_DOUT
PCM_DIN
MSB
MSB
LSB
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Figure 7: Timing in Auxiliary Mode
Clock and mode can be configured by AT command, and the default configuration is master mode using short sync data format with 2048kHz PCM_CLK and 8kHz PCM_SYNC. In addition, EC25
Mini PCIe’s firmware has integrated the configuration on some PCM codec
’s application with I2C interface. Refer to
document [2] for details about the command AT+QDAI.
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The following figure shows a reference design of PCM interface with an external codec IC.
PCM_CLK
PCM_SYNC
PCM_DOUT
PCM_DIN
I2C_SCL
I2C_SDA
Module
1.8V
BCLK
FS
DACIN
ADCOUT
MIC_BIAS
MIC+
MIC-
SPKOUT+
SCLK
SDIN
Codec
SPKOUT-
Figure 8: Reference Circuit of PCM Application with Audio Codec
3.8. Control Signals
1
31
20
22
42
17
The following table shows the pin definition of control signals.
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Pin No. Pin Name I/O
Output signal can be used to wake up
RI
DTR
W_DISABLE#
PERST#
DO
DI
3.3V
3.3V the host.
Sleep mode control.
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LED_WWAN#
Active-low LED signal for indicating the state of the module.
Output signal can be used to wake up the host.
WAKE# OC
—
3.8.1. RI Signal
The RI signal can be used to wake up the host. When URC returns, there will be the following behavior on the RI pin after executing AT command AT+QCFG=
”risignaltype”,”physical”.
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120 ms
High
Low
URC return
Figure 9: RI Behavior
3.8.2. DTR Signal
The DTR signal supports sleep control function. Drive it to low level will wake up the module. AT command AT+QCFG=
”pwrsavedtr”,0 is used to disable the sleep control function.
3.8.3. W_DISABLE# Signal
EC25 Mini PCIe provides W_DISABLE# signal to disable wireless communications through hardware operation. The following table shows the radio operational states of module. Please refer to document [2] for related AT commands.
Quectel
W_DISABLE#
High Level
AT Commands
AT+CFUN=1
Radio Operation
Enabled
High Level
Low Level
3.8.4. PERST# Signal
AT+CFUN=0
AT+CFUN=4
AT+CFUN=0
AT+CFUN=1
AT+CFUN=4
Disabled
Disabled
The PERST# signal can be used to force a hardware reset on the card. You can reset the module by driving the PERST# to a low level voltage with the time frame of 150~460ms and then releasing it. The reset scenario is illustrated in the following figure.
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VCC_3V3
≤ 460ms
≥ 150ms
PERST#
V
IH
≥ 2.3V
V
IL
≤ 0.5V
Module
Status
Running Resetting
Restart
Figure 10: Timing of Resetting Module
3.8.5. LED_WWAN# Signal
The LED_WWAN# signal of EC25 Mini PCIe is used to indicate the network status of the module, which can absorb the current up to 40mA. According to the following circuit, in order to reduce the current of the
LED, a resistor must be placed in series with the LED. The LED is emitting light when the LED_WWAN# output signal is active low.
R
VCC
Figure 11: LED_WWAN# Signal Reference Circuit Diagram
The following table shows the indications of network status of the LED_WWAN# signal.
LED_WWAN#
Confidential
Low Level (Light on) Registered on network
No network coverage or not registered
W_DISABLE# signal is in low level. (Disable the RF)
AT+CFUN=0, AT+CFUN=4
High-impedance (Light off)
3.8.6. WAKE# Signal
The WAKE# signal is an open collector signal which is similar to RI signal. But a host pull-up resistor and
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AT command AT+QCFG=
”risignaltype”,”physical” are required. When URC returns, there will be
120ms low level pulse output as below.
120 ms
High
(external pull-up)
Low
URC return
Figure 12: WAKE# Behavior
3.9. Antenna Interfaces
Type
EC25 Mini PCIe antenna interfaces include a main antenna interface, a Rx-diversity antenna interface and a GNSS antenna interface. receive diversity.
Rx-diversity function is enabled by default. Use the AT command AT+QCFG=
”diversity”,0 can disable
Quectel
Table 13: Antenna Requirements
GNSS
GSM/WCDMA/LTE
Requirements
Frequency range: 1561 - 1615MHz
Confidential
Gain (dBi): 1
Max Input Power (W): 50
Input Impedance (ohm): 50
Polarization Type: Vertical
Cable Insertion Loss: < 1dB
(GSM900, WCDMA B5/B8, LTE B5/B8/B12/B17/ B20)
Cable Insertion Loss: < 1.5dB
(GSM1800, WCDMA B1/B2/B3/B4, LTE B1/B2/B3/B4)
Cable insertion loss < 2dB
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(LTE B7/B38/B40/B41)
The following figure shows the overall sizes of RF connector.
Figure 13: Dimensions of the RF Connector (Unit: mm)
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Confidential
Figure 14: Mechanicals of U.FL-LP Connectors
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4
Electrical and Radio Characteristics
4.1. General Description
This chapter mainly describes the following electrical and radio characteristics of EC25 Mini PCIe:
Power supply requirements
IO requirements
Current consumption
RF characteristics
GNSS receiver
ESD characteristics
4.2. Power Supply Requirements
Quectel
Table 14: Power Supply Requirements
Parameter
VCC_3V3
Description
Power Supply
Min.
3.0
Typ.
3.3
Max.
3.6
Unit
V
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4.3. IO Requirements
The following table shows the IO requirements of EC25 Mini PCIe.
Table 15: IO Requirements
Parameter Description
V
IH
Input High Voltage
Min.
0.7 x VCC_3V3
Max.
VCC_3V3+0.3
Unit
V
V
IL
V
OH
Input Low Voltage
Output High Voltage
-0.3
VCC_3V3-0.5
0.3 x VCC_3V3 V
VCC_3V3 V
Output Low Voltage 0 0.4 V V
OL
NOTES
S
1. The PCM and I2C interface belongs to 1.8V power domain, and other IO interfaces belong to
2. The maximum value of V
IL for PERST# signal and W_DISABLE# signal is 0.5V.
VCC_3V3 power domain.
Quectel
The following tables show the output power and receiving sensitivity of conducted RF of EC25 Mini PCIe module.
Frequency
GSM900
DCS1800
GSM900 (8-PSK)
DCS1800 (8-PSK)
WCDMA bands
LTE FDD bands
Max.
33dBm±2dB
30dBm±2dB
27dBm±3dB
26dBm±3dB
24dBm+1/-3dB
23dBm±2dB
Min.
5dBm±5dB
0dBm±5dB
5dBm±5dB
0dBm±5dB
<-50dBm
<-44dBm
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LTE TDD bands 23dBm±2dB
Table 17: Conducted RF Receiving Sensitivity of EC25-A Mini PCIe
Frequency
WCDMA B2
WCDMA B4
Primary
-110dBm
-110dBm
WCDMA B5
LTE FDD B2 (10M)
-110.5dBm
-98dBm
LTE FDD B4 (10M) -97.5dBm
LTE FDD B12 (10M) -94.5dBm
Diversity
NA
NA
NA
-98dBm
-99dBm
-98dBm
Table 18: Conducted RF Receiving Sensitivity of EC25-AUT Mini PCIe
SIMO
NA
NA
NA
-101dBm
-101dBm
-101dBm
<-44dBm
3GPP (SIMO)
-104.7dBm
-106.7dBm
-104.7dBm
-94.3dBm
-96.3dBm
-93.3dBm
Frequency
WCDMA B1
WCDMA B5
Primary
-110dBm
-110.5dBm
Diversity
NA
NA
SIMO
NA
NA
-98.5dBm -98dBm -101dBm
3GPP (SIMO)
-106.7dBm
-104.7dBm
LTE FDD B1 (10M) -96.3dBm
LTE FDD B3 (10M)
LTE FDD B5 (10M)
LTE FDD B7 (10M)
-98dBm
-98dBm
-97dBm
LTE FDD B28 (10M) -97dBm
-96dBm
-99dBm
-95dBm
-99dBm
-100dBm
-102.5dBm
-98.5dBm
-102dBm
-93.3dBm
-94.3dBm
-94.3dBm
-93.3dBm
Table 19: Conducted RF Receiving Sensitivity of EC25-E Mini PCIe
Frequency
GSM
Primary
-109dBm
Diversity
NA
SIMO
NA
3GPP (SIMO)
-102dBm
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WCDMA Band1
WCDMA Band5
WCDMA Band8
LTE-FDD B1 (10M)
LTE-FDD B3 (10M)
LTE-FDD B5 (10M)
LTE-FDD B7 (10M)
-110.5dBm
-110.5dBm
-110.5dBm
-98dBm
-96.5dBm
-98dBm
-97dBm
LTE-FDD B8 (10M) -97dBm
LTE-FDD B20 (10M) -97.5dBm
LTE-TDD B38 (10M) -97 dBm
LTE-TDD 40 (10M) -96.3dBm
LTE-TDD 41 (10M) -95.2dBm
NA
NA
NA
-98dBm
-98.5dBm
-98.5dBm
-94.5dBm
-97dBm
-99dBm
-97dBm
-98dBm
-95dBm
NA
NA
NA
-101.5dBm
-101.5dBm
-101dBm
-99.5dBm
-101dBm
-102.5dBm
-100dBm
-101dBm
-99dBm
-106.7dBm
-104.7dBm
-103.7dBm
-96.3dBm
-93.3dBm
-94.3dBm
-94.3dBm
-93.3dBm
-93.3dBm
-96.3dBm
-96.3dBm
-94.3dBm
Frequency
LTE FDD B4 (10M)
Primary
-97.5dBm
Diversity
-99dBm
SIMO
-101dBm
3GPP (SIMO)
-96.3dBm
LTE FDD B13 (10M) -95dBm
4.5. GNSS Receiver
-97dBm -100dBm -93.3dBm
Confidential
EC25 Mini PCIe integrates a GNSS receiver that supports IZat Gen 8C of Qualcomm (GPS, GLONASS,
BeiDou, Galileo, QZSS). Also, it supports Qualcomm gpsOneXTRA technology (one kind of A-GNSS).
This technology will download XTRA file from the internet server to enhance the TTFF. XTRA file contains predicted GPS and GLONASS satellites coordinates and clock biases valid for up to 7 days. It is best if
XTRA file is downloaded every 1-2 days. Additionally, EC25 Mini PCIe can support standard NMEA-0183 protocol and output NMEA messages with 1Hz via USB NMEA interface.
EC25 Mini PCIe GNSS engine is switched off by default. You must switch on it by AT command. Please refer to document [3] for more details about GNSS engine technology and configurations. The GNSS engine should use a passive antenna.
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4.6. ESD Characteristics
The following table shows the ESD characteristics of EC25 Mini PCIe.
Table 21: ESD Characteristics
Part
Power Supply and GND
Antenna Interface
USB Interface
USIM Interface
Others
Contact Discharge
+/-5
+/-4
+/-4
+/-4
+/-0.5
Air Discharge
+/-10
+/-8
+/-8
+/-8
+/-1 kV kV kV
Unit
kV kV
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Confidential
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5
Dimensions and Packaging
5.1. General Description
This chapter mainly describes the following dimensions as well as the packaging specification of EC25
Mini PCIe:
Mechanical Dimensions of EC25 Mini PCIe
Standard Dimensions of Mini PCI Express
5.2. Mechanical Dimensions of EC25 Mini PCIe
Quectel
Confidential
Figure 15: Mechanical Dimensions of EC25 Mini PCIe (Unit: mm)
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5.3. Standard Dimensions of Mini PCI Express
The following figure shows the standard dimensions of Mini PCI Express. Please refer to document [1] for detailed A and B.
Quectel
Figure 16: Standard Dimensions of Mini PCI Express (Unit: mm)
Confidential
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EC25 Mini PCIe adopts a standard Mini PCI Express connector which compiles with the directives and standards listed in the document [1]. The following figure takes the Molex 679100002 as an example.
Figure 17: Dimensions of the Mini PCI Express Connector (Unit: mm)
Quectel
The EC25 Mini PCIe is packaged in a tray. Each tray contains 10pcs of modules. The smallest package of
EC25 Mini PCIe contains 100pcs.
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6
Appendix References
Table 22: Related Documents
SN
[1]
Document Name
PCI Express Mini Card Electromechanical
Specification Revision 1.2
Quectel_EC25_AT_Commands_Manual [2]
[3]
Table 23: Terms and Abbreviations
Remark
Mini PCI Express Specification
EC25 AT Commands Manual
Quectel_EC25_GNSS_AT_Commands_Manual EC25 GNSS AT Commands Manual
Abbreviation
AMR bps
CS
DC-HSPA+
DFOTA
DL
EFR
ESD
FDD
FR
GLONASS
GMSK
Bits Per Second
Coding Scheme
Dual-carrier High Speed Packet Access
Enhanced Full Rate
Electrostatic Discharge
Frequency Division Duplexing
Full Rate
GLObalnaya Navigatsionnaya Sputnikovaya Sistema, the Russian Global
Navigation Satellite System
Gaussian Minimum Shift Keying
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PPP
RF
Rx
USIM
SIMO
SMS
Mbps
ME
MIMO
MMS
MO
MT
PCM
PDU
UART
UL
URC
WCDMA
GNSS
GPS
GSM
HR kbps
LED
LTE
LTE Module Series
EC25 Mini PCIe Hardware Design
Global Navigation Satellite System
Global Positioning System
Global System for Mobile Communications
Half Rate
Kilo Bits Per Second
Light Emitting Diode
Long-Term Evolution
Million Bits Per Second
Mobile Equipment (Module)
Multiple-Input Multiple-Output
Multimedia Messaging Service
Mobile Originated
Protocol Data Unit
Point-to-Point Protocol
Radio Frequency
Single Input Multiple Output
Short Message Service
Universal Asynchronous Receiver & Transmitter
Up Link
Unsolicited Result Code
Wideband Code Division Multiple Access
EC25_Mini_PCIe_Hardware_Design Confidential / Released 38 / 38
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Key Features
- Supports FDD-LTE, TDD-LTE, WCDMA and GSM networks
- PCI Express Mini Card 1.2 standard interface
- Supports embedded operating systems such as WinCE, Linux, Android
- Provides audio, high-speed data transmission and GNSS functionalities
- Supports up to non-CA CAT4, Max 150Mbps (DL), Max 50Mbps (UL)
- Supports up to DC-HSPA+, Max 42Mbps (DL), Max 5.76Mbps (UL)
- Supports TCP/UDP/PPP/FTP/HTTP/SMTP/MMS/NTP/PING/DTMF/FILE/CMUX/QMI protocols
- Supports text and PDU mode SMS
- Supports USB 2.0 specification (slave only), data transfer rate up to 480Mbps
- Supports one digital audio interface: PCM interface
