Quectel Wireless Solutions 201605EC25A Users Manual
EC25-A
User Manual
LTE Module Series
Rev. EC25-A_User_Manual_V1.0
Date: 2016-03-28
www.quectel.com
LTE Module
EC25-A User Manual
Our aim is to provide customers with timely and comprehensive service. For any
assistance, please contact our company headquarters:
Quectel Wireless Solutions Co., Ltd.
Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233
Tel: +86 21 5108 6236
Mail: info@quectel.com
Or our local office, for more information, please visit:
http://www.quectel.com/support/salesupport.aspx
For technical support, to report documentation errors, please visit:
http://www.quectel.com/support/techsupport.aspx
Or Email: Support@quectel.com
GENERAL NOTES
QUECTEL OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION
PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT
TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT
MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT
ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR
RELIANCE UPON THE INFORMATION. THE INFORMATION SUPPLIED HEREIN IS SUBJECT TO
CHANGE WITHOUT PRIOR NOTICE.
COPYRIGHT
THIS INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF
QUECTEL CO., LTD. TRANSMITTABLE, REPRODUCTION, DISSEMINATION AND EDITING OF THIS
DOCUMENT AS WELL AS UTILIZATION OF THIS CONTENTS ARE FORBIDDEN WITHOUT
PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS
ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL
OR DESIGN.
Copyright © Quectel Wireless Solutions Co., Ltd. 2016. All rights reserved.
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EC25-A User Manual
About the Document
History
Revision Date Author Description
V1.0 2016-03-28 Woody WU Initial
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Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 3
Table Index ................................................................................................................................................... 5
Figure Index ................................................................................................................................................. 6
1 Introduction .......................................................................................................................................... 7
1.1. Safety Information ................................................................................................................... 7
2 Product Concept .................................................................................................................................. 9
2.1. General Description ................................................................................................................ 9
2.2. Directives and Standards ..................................................................................................... 10
2.2.1. FCC Statement ............................................................................................................. 10
2.3. Key Features .......................................................................................................................... 10
2.4. Functional Diagram ............................................................................................................... 12
2.5. Evaluation Board ................................................................................................................... 13
3 Application Interface ......................................................................................................................... 14
3.1. General Description .............................................................................................................. 14
3.2. Pin Assignment ...................................................................................................................... 14
3.3. Pin Description ...................................................................................................................... 16
3.4. Operating Modes ................................................................................................................... 21
3.5. Power Saving ......................................................................................................................... 22
3.5.1. Sleep Mode ................................................................................................................... 22
3.5.1.1. UART Application .............................................................................................. 22
3.5.1.2. USB Application with USB Remote Wakeup Function .................................. 23
3.5.1.3. USB Application with USB Suspend/Resume and RI Function .................... 23
3.5.1.4. USB Application without USB Suspend Function ......................................... 24
3.5.2. Airplane Mode .............................................................................................................. 25
3.6. Power Supply ......................................................................................................................... 25
3.6.1. Power Supply Pins ....................................................................................................... 25
3.6.2. Decrease Voltage Drop ................................................................................................ 26
3.6.3. Reference Design for Power Supply .......................................................................... 27
3.6.4. Monitor the Power Supply ........................................................................................... 28
3.7. Turn on and off Scenarios .................................................................................................... 28
3.7.1. Turn on Module Using the PWRKEY .......................................................................... 28
3.7.2. Turn off Module ............................................................................................................ 30
3.7.2.1. Turn off Module Using the PWRKEY Pin......................................................... 30
3.7.2.2. Turn off Module Using AT Command .............................................................. 30
3.8. Reset the Module ................................................................................................................... 30
3.9. USIM Card Interface .............................................................................................................. 32
3.10. USB Interface ......................................................................................................................... 34
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3.11. UART Interface ....................................................................................................................... 36
3.12. PCM and I2C Interface ........................................................................................................... 38
3.13. ADC Function ......................................................................................................................... 41
3.14. Network Status Indication .................................................................................................... 41
3.15. STATUS................................................................................................................................... 42
3.16. Behavior of the RI .................................................................................................................. 43
4 GNSS Receiver ................................................................................................................................... 45
4.1. General Description .............................................................................................................. 45
4.2. GNSS Performance ............................................................................................................... 45
4.3. Layout Guideline.................................................................................................................... 46
5 Antenna Interface ............................................................................................................................... 47
5.1. Main/Rx-diversity Antenna Interface ................................................................................... 47
5.1.1. Pin Definition ................................................................................................................ 47
5.1.2. Operating Frequency ................................................................................................... 47
5.1.3. Reference Design ......................................................................................................... 48
5.2. GNSS Antenna Interface ....................................................................................................... 48
5.3. Antenna Installation .............................................................................................................. 50
5.3.1. Antenna Requirement .................................................................................................. 50
5.3.2. Install the Antenna with RF Connector ...................................................................... 50
6 Electrical, Reliability and Radio Characteristics ............................................................................ 53
6.1. Absolute Maximum Ratings ................................................................................................. 53
6.2. Power Supply Ratings ........................................................................................................... 53
6.3. Operating Temperature ......................................................................................................... 54
6.4. Current Consumption ........................................................................................................... 54
6.5. RF Output Power ................................................................................................................... 54
6.6. RF Receiving Sensitivity ....................................................................................................... 55
6.7. Electrostatic Discharge ......................................................................................................... 55
7 Mechanical Dimensions .................................................................................................................... 57
7.1. Mechanical Dimensions of the Module ............................................................................... 57
7.2. Footprint of Recommendation ............................................................................................. 59
7.3. Top View of the Module ........................................................................................................ 60
7.4. Bottom View of the Module .................................................................................................. 60
8 Storage and Manufacturing .............................................................................................................. 61
8.1. Storage.................................................................................................................................... 61
8.2. Manufacturing and Welding ................................................................................................. 61
8.3. Packaging ............................................................................................................................... 62
9 Appendix A Reference ....................................................................................................................... 64
10 Appendix B GPRS Coding Scheme ................................................................................................. 68
11 Appendix C GPRS Multi-slot Class .................................................................................................. 69
12 Appendix D EDGE Modulation and Coding Scheme ..................................................................... 70
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Table Index
TABLE 1: EC25 SERIES FREQUENCY BANDS ........................................................................................ 9
TABLE 2: EC25 KEY FEATURES .............................................................................................................. 10
TABLE 3: IO PARAMETERS DEFINITION ................................................................................................ 16
TABLE 4: PIN DESCRIPTION ................................................................................................................... 16
TABLE 5: OVERVIEW OF OPERATING MODES ..................................................................................... 21
TABLE 6: VBAT AND GND PINS ............................................................................................................... 26
TABLE 7: PWRKEY PIN DESCRIPTION ................................................................................................... 28
TABLE 8: RESET_N PIN DESCRIPTION .................................................................................................. 31
TABLE 9: PIN DEFINITION OF THE USIM INTERFACE .......................................................................... 32
TABLE 10: USB PIN DESCRIPTION ......................................................................................................... 34
TABLE 11: PIN DEFINITION OF THE MAIN UART INTERFACE ............................................................. 36
TABLE 12: PIN DEFINITION OF THE DEBUG UART INTERFACE ......................................................... 36
TABLE 13: LOGIC LEVELS OF DIGITAL I/O............................................................................................. 37
TABLE 14: PIN DEFINITION OF PCM AND I2C INTERFACE .................................................................. 39
TABLE 15: PIN DEFINITION OF THE ADC ............................................................................................... 41
TABLE 16: CHARACTERISTIC OF THE ADC ........................................................................................... 41
TABLE 17: PIN DEFINITION OF NETWORK INDICATOR ....................................................................... 41
TABLE 18: WORKING STATE OF THE NETWORK INDICATOR ............................................................. 42
TABLE 19: PIN DEFINITION OF STATUS ................................................................................................. 43
TABLE 20: BEHAVIOR OF THE RI ............................................................................................................ 44
TABLE 21: GNSS PERFORMANCE .......................................................................................................... 45
TABLE 22: PIN DEFINITION OF THE RF ANTENNA ............................................................................... 47
TABLE 23: THE MODULE OPERATING FREQUENCIES ........................................................................ 47
TABLE 24: PIN DEFINITION OF GNSS ANTENNA .................................................................................. 49
TABLE 25: GNSS FREQUENCY ............................................................................................................... 49
TABLE 26: ANTENNA REQUIREMENTS .................................................................................................. 50
TABLE 27: ABSOLUTE MAXIMUM RATINGS ........................................................................................... 53
TABLE 28: THE MODULE POWER SUPPLY RATINGS ........................................................................... 53
TABLE 29: OPERATING TEMPERATURE ................................................................................................ 54
TABLE 30: CONDUCTED RF OUTPUT POWER...................................................................................... 55
TABLE 31: ELECTROSTATICS DISCHARGE CHARACTERISTICS ....................................................... 56
TABLE 32: RELATED DOCUMENTS ........................................................................................................ 64
TABLE 33: TERMS AND ABBREVIATIONS .............................................................................................. 64
TABLE 34: DESCRIPTION OF DIFFERENT CODING SCHEMES .......................................................... 68
TABLE 35: GPRS MULTI-SLOT CLASSES ............................................................................................... 69
TABLE 36: EDGE MODULATION AND CODING SCHEME ..................................................................... 70
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Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ........................................................................................................ 12
FIGURE 2: PIN ASSIGNMENT (TOP VIEW) ............................................................................................. 15
FIGURE 3: UART SLEEP APPLICATION .................................................................................................. 22
FIGURE 4: SLEEP APPLICATION WITH USB REMOTE WAKEUP ........................................................ 23
FIGURE 5: SLEEP APPLICATION WITH RI ............................................................................................. 24
FIGURE 6: SLEEP APPLICATION WITHOUT SUSPEND FUNCTION .................................................... 24
FIGURE 7: POWER SUPPLY LIMITS DURING TRANSMIT BURST ....................................................... 26
FIGURE 8: STAR STRUCTURE OF THE POWER SUPPLY .................................................................... 27
FIGURE 9: REFERENCE CIRCUIT OF POWER SUPPLY ....................................................................... 27
FIGURE 10: TURN ON THE MODULE USING DRIVING CIRCUIT ......................................................... 28
FIGURE 11: TURN ON THE MODULE USING KEYSTROKE .................................................................. 29
FIGURE 12: TIMING OF TURNING ON MODULE ................................................................................... 29
FIGURE 13: TIMING OF TURNING OFF MODULE .................................................................................. 30
FIGURE 14: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT .............................. 31
FIGURE 15: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON .............................................. 31
FIGURE 16: TIMING OF RESETTING MODULE ...................................................................................... 32
FIGURE 17: REFERENCE CIRCUIT OF 8-PIN USIM CONNECTOR ...................................................... 33
FIGURE 18: REFERENCE CIRCUIT OF 6-PIN USIM CONNECTOR ...................................................... 33
FIGURE 19: REFERENCE CIRCUIT OF USB APPLICATION ................................................................. 35
FIGURE 20: REFERENCE CIRCUIT WITH TRANSLATOR CHIP............................................................ 37
FIGURE 21: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT ...................................................... 38
FIGURE 22: PRIMARY MODE TIMING ..................................................................................................... 39
FIGURE 23: AUXILIARY MODE TIMING ................................................................................................... 39
FIGURE 24: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC ............................ 40
FIGURE 25: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .................................................. 42
FIGURE 26: REFERENCE CIRCUIT OF THE STATUS............................................................................ 43
FIGURE 27: REFERENCE CIRCUIT OF ANTENNA INTERFACE ........................................................... 48
FIGURE 28: REFERENCE CIRCUIT OF GNSS ANTENNA ..................................................................... 49
FIGURE 29: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ........................................ 51
FIGURE 30: MECHANICALS OF UF.L-LP CONNECTORS ..................................................................... 51
FIGURE 31: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ................................................... 52
FIGURE 32: MODULE TOP AND SIDE DIMENSIONS ............................................................................. 57
FIGURE 33: MODULE BOTTOM DIMENSIONS (BOTTOM VIEW) ......................................................... 58
FIGURE 34: RECOMMENDED FOOTPRINT (TOP VIEW) ...................................................................... 59
FIGURE 35: TOP VIEW OF THE MODULE .............................................................................................. 60
FIGURE 36: BOTTOM VIEW OF THE MODULE ...................................................................................... 60
FIGURE 37: LIQUIDS TEMPERATURE .................................................................................................... 62
FIGURE 38: CARRIER TAPE .................................................................................................................... 63
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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.
Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it is
switched off. The operation of wireless appliances in an aircraft is forbidden, so as
to prevent interference with communication systems. Consult the airline staff about
the use of wireless devices on boarding the aircraft, if your device offers a 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.
EC25-A User Manual
1 Introduction
This document defines the EC25 module and describes its air interface and hardware interface which are
connected with your application.
This document can help you quickly understand module interface specifications, electrical and
mechanical details, as well as other related information of EC25 module. Associated with application
notes and user guide, you can use EC25 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 module. Manufacturers of the cellular
terminal should send the following safety information to users and operating personnel and to incorporate
these guidelines into all manuals supplied with the product. If not so, Quectel assumes no liability for the
customer’s failure to comply with these precautions.
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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.
EC25-A User Manual
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1.
1)
GNSS function is optional.
2.
2)
EC25 series (EC25-E/EC25-A/EC25-V/EC25-AUT) includes Data-only and Telematics versions.
Data-only version does not support voice function, while Telematics version supports it.
EC25-A User Manual
2 Product Concept
2.1. General Description
EC25 is a series of FDD-LTE /TDD-LTE /WCDMA/TD-SCDMA/CDMA/GSM wireless communication
module with receive diversity, which provides data connectivity on FDD-LTE, TDD-LTE, DC-HSPA+,
HSPA+, HSDPA, HSUPA, WCDMA, TD-SCDMA, CDMA, EDGE and GPRS networks. It can also provide
GNSS1) and voice functionality2) for your specific application. EC25 contains four variants: EC25-E,
EC25-A, EC25-V and EC25-AUT. You can choose the dedicated type based on the region or operator.
The following table shows the frequency bands of EC25 series modules.
Table 1: EC25-A Frequency Bands
NOTES
FDD-LTE
(with Rx-diversity)
TDD-LTE
(with Rx-diversity)
WCDMA
(with Rx-diversity)
GSM Not supported
GNSS
EC25-A
B2/B4/B12
Not supported
B2/B5
GPS,GLONASS,
BeiDou/Compass,Galileo,QZSS
With a tiny profile of 32.0mm × 29.0mm × 2.4mm, EC25 can meet almost all requirements for M2M
applications such as automotive, metering, tracking system, security, router, wireless POS, mobile
computing device, PDA phone and tablet PC, etc.
EC25 is an SMD type module which can be embedded in applications through its 144-pin pads, including
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Feature
Details
Power Supply
Supply voltage: 3.3V~4.3V Typical supply voltage: 3.8V
Transmitting 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
LTE Features
Support up to non-CA CAT4
Support 1.4 to 20MHz RF bandwidth
Support Multiuser MIMO in DL direction
FDD: Max 50Mbps (UL), 150Mbps (DL)
TDD: Max 35Mbps (UL), 130Mbps (DL)
WCDMA Features
Support 3GPP R8 DC-HSPA+
Support 16-QAM, 64-QAM and QPSK modulation
3GPP R6 CAT6 HSUPA: Max 5.76Mbps (UL)
3GPP R8 CAT24 DC-HSPA+: Max 42Mbps (DL)
Internet Protocol Features
Support TCP/UDP/PPP/FTP/HTTP/SMTP/MMS/NTP/PING/QMI protocols
Support the protocols PAP (Password Authentication Protocol) and CHAP
(Challenge Handshake Authentication Protocol) usually used for PPP
connections
SMS
Text and PDU mode
Point to point MO and MT
EC25-A User Manual
80 LCC signal pads and 64 other pads.
2.2. Directives and Standards
2.2.1. FCC Statement
Any Changes or modifications not expressly approved by the party responsible for compliance could void
the user’s authority to operate the equipment.
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.
The outside of final products that contains this module device must display a label
referring to the enclosed module. This exterior label can use wording such as the
following:“Contains Transmitter Module FCC ID: XMR201605EC25A” Any similar wording that expresses the
same meaning may be used.
2.3. Key Features
The following table describes the detailed features of EC25 module.
Table 2: EC25 Key Features
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SMS cell broadcast
SMS storage: ME by default
USIM Interface
Support USIM/SIM card: 1.8V, 3.0V
Audio Features
Support one digital audio interface: PCM interface
WCDMA: AMR/AMR-WB
LTE: AMR/AMR-WB
Support echo cancellation and noise suppression
PCM Interface
Used for audio function with external codec
Support 8-bit A-law, 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
USB Interface
UART Interface
Rx-diversity
Support LTE/WCDMA Rx-diversity
GNSS Features
Gen8C-Lite of Qualcomm
Protocol: NMEA 0183
AT Commands
Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT
commands
Network Indication
Two pins including NET_MODE and NET_STATUS to indicate network
connectivity status
Antenna Interface
Including main antenna (ANT_MAIN), Rx-diversity antenna (ANT_DIV) and
GNSS antenna (ANT_GNSS)
Physical Characteristics
Size: 32.0±0.15 × 29.0±0.15 × 2.4±0.2mm
Weight: approx. 4.9g
Temperature Range
Normal operation: -35°C ~ +75°C
Restricted operation: -40°C ~ -35°C and +75°C ~ +85°C
Storage temperature: -45°C ~ +90°C
Firmware Upgrade
USB interface
RoHS
EC25-A User Manual
Compliant with USB 2.0 specification (slave only); the data transfer rate
can reach up to 480Mbps
Used for AT command communication, data transmission, GNSS NMEA
output, software debug and firmware upgrade
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
Main UART:
Used for AT command and data transmission
Baud rate reach up to 921600bps, 115200bps by default
Support RTS and CTS hardware flow control
Debug UART:
Used for Linux console, log output
115200bps baud rate
All hardware components are fully compliant with EU RoHS directive
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2.4. Functional Diagram
The following figure shows a block diagram of EC25 and illustrates the major functional parts.
Power management
Baseband
DDR+NAND flash
Radio frequency
Peripheral interface
ANT_MAIN ANT_DIVANT_GNSS
VBAT_RF
VBAT_BB
PWRKEY
RESET_N
ADCs
APT
PMIC
Tx
Control
PA
Switch
Duplex
PRx DRx
SAW
LNA
Transceiver
IQ Control
Baseband
Switch
SAW
NAND
DDR2
SDRAM
STATUS
VDD_EXT USB USIM PCM
19.2M
XO
UARTI2C
Figure 1: Functional Diagram
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2.5. Evaluation Board
In order to help you to develop applications with EC25, Quectel supplies an evaluation board (EVB), USB
data cable, earphone, antenna and other peripherals to control or test the module.
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EC25-A User Manual
3 Application Interface
3.1. General Description
EC25 is equipped with an 80-pin SMT pad plus 64-pin ground pads and reserved pads that can be
connected to cellular application platform. Sub-interfaces included in these pads are described in detail in
the following chapters:
Power supply
USIM interface
USB interface
UART interface
PCM interface
ADC interface
Status indication
3.2. Pin Assignment
The following figure shows the pin assignment of the EC25 module.
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1. Keep all RESERVED pins and unused pins unconnected.
2. GND pads 85~112 should be connected to ground in the design, and RESERVED pads 73~84
should not be designed in schematic and PCB decal.
3. “※” means these interface functions are only supported on Telematics version.
EC25-A User Manual
WAKEUP_IN
AP_READY
RESERVED
W_DISABLE#
NET_MODE
NET_STATUS
VDD_EXT
RESERVED
RESERVED
GND
GND
USIM_GND
DBG_RXD
DBG_TXD
USIM_PRESENCE
USIM_VDD
USIM_DATA
USIM_CLK
USIM_RST
RESERVED
1
2
4
5
6
7
141
142
10
11
12
13
14
15
16
17
18
RESERVED
RESERVED
USB_VBUS
USB_DM
USB_DP
GND
114
113
7271706968676665646362616059585756
117
129
118
119
120
121
122
123
124
125
126
127
128
108
109
110
111
112
115
20212223242526272829303132
19
130
131
132
133
134
8
9
135
136
137
138
139
140
116
103
104
105
106
107
RXD
TXD
DTR
99
100
82
83
84
101
102
79
80
81
RTS
CTS
76
77
78
DCD
95
96
73
74
75
97
98
RI
VBAT_BB
STATUS
90
91
92
93
94
VBAT_BB
VBAT_RF
85
86
87
88
89
33
VBAT_RF
GND
34335
RESERVED
55
144
143
36
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
GND
GND
GND
GND
GND
ANT_MAIN
GND
RESERVED
RESERVED
ANT_GNSS
GND
ADC0
ADC1
RESERVED
I2C_SDA
I2C_SCL
RESERVED
RESERVED
RESERVED
RESERVED
NOTES
RESERVED
Power Pins
GND
PWRKEY
PCM_IN※PCM_OUT※PCM_SYNC
RESERVED
GND
GND Pins
PCM_CLK※RESERVED
※
RESET_N
RESERVED
Figure 2: Pin Assignment (Top View)
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
GND
ANT_DIV
Signal Pins RESERVED Pins
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Type
Description
IO
Bidirectional input/output
DI
Digital input
DO
PI
PO
AI
AO
OD
Open drain
Power Supply
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
VBAT_BB
59, 60
PI
Power supply for
module baseband
part.
Vmax=4.3V
Vmin=3.3V
Vnorm=3.8V
It must be able to
provide sufficient
current up to 0.8A.
VBAT_RF
57, 58
PI
Power supply for
module RF part.
Vmax=4.3V
Vmin=3.3V
Vnorm=3.8V
It must be able to
provide sufficient
current up to 1.8A in a
transmitting burst.
VDD_EXT
7
PO
Provide 1.8V for
external circuit.
Vnorm=1.8V
IOmax=50mA
Power supply for
external GPIO’s pull up
circuits.
GND
8, 9, 19,
22, 36, 46,
48, 50~54,
56, 72,
EC25-A User Manual
3.3. Pin Description
The following tables show the EC25’s pin definition.
Table 3: IO Parameters Definition
Digital output
Power input
Table 4: Pin Description
Power output
Analog input
Analog output
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85~112
Turn on/off
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
PWRKEY
21
DI
Turn on/off the
module.
VIHmax=2.1V
VIHmin=1.3V
VILmax=0.5V
RESET_N
20
DI
Reset the module.
VIHmax=2.1V
VIHmin=1.3V
VILmax=0.5V
Status Indication
Pin Name
Pin No.
DC Characteristics
STATUS
61
The drive current
should be less than
0.9mA.
NET_MODE
5
VOHmin=1.35V
VOLmax=0.45V
NET_
STATUS
6
DO
Indicate the module
network activity
status.
VOHmin=1.35V
VOLmax=0.45V
1.8V power domain.
If unused, keep it
open.
USB Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
USB_VBUS
71
PI
USB detection.
Vnorm=5.0V
USB_DP
69
IO
USB differential data
bus.
Compliant with USB
2.0 standard
specification.
Require differential
impedance of 90ohm.
USB_DM
70
IO
USB differential data
bus.
Compliant with USB
2.0 standard
specification.
Require differential
impedance of 90ohm.
USIM Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
USIM_GND
10
Specified ground for
USIM card.
USIM_VDD
14
For 1.8V USIM:
Vmax=1.9V
Vmin=1.7V
EC25-A User Manual
I/O Description
Indicate the module
OD
operating status.
Indicate the module
DO
network registration
mode.
Comment
Require external
pull-up. If unused,
keep it open.
1.8V power domain.
If unused, keep it
open.
EC25-A_User_Manual Confidential / Released 17 / 7
Power supply for
PO
USIM card.
Either 1.8V or 3V is
supported by the
module automatically.
0
LTE Module
For 3.0V USIM:
Vmax=3.05V
Vmin=2.7V
IOmax=50mA
USIM_DATA
15
For 1.8V USIM:
VILmax=0.6V
VIHmin=1.2V
VOLmax=0.45V
VOHmin=1.35V
For 3.0V USIM:
VILmax=1.0V
VIHmin=1.95V
VOLmax=0.45V
VOHmin=2.55V
USIM_CLK
16
For 1.8V USIM:
VOLmax=0.45V
VOHmin=1.35V
For 3.0V USIM:
VOLmax=0.45V
VOHmin=2.55V
USIM_RST
17
DO
Reset signal of
USIM card.
For 1.8V USIM:
VOLmax=0.45V
VOHmin=1.35V
For 3.0V USIM:
VOLmax=0.45V
VOHmin=2.55V
USIM_
PRESENCE
13
DI
USIM card insertion
detection.
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
1.8V power domain.
If unused, keep it
open.
UART Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
RI
62
DO
Ring indicator
VOLmax=0.45V
VOHmin=1.35V
1.8V power domain.
If unused, keep it
open.
DCD
63
VOLmax=0.45V
VOHmin=1.35V
EC25-A User Manual
Data signal of USIM
IO
card.
Clock signal of USIM
DO
card.
EC25-A_User_Manual Confidential / Released 18 / 7
DO
Data carrier
detection.
1.8V power domain.
If unused, keep it
open.
0
LTE Module
CTS
64
DO
Clear to send.
VOLmax=0.45V
VOHmin=1.35V
1.8V power domain.
If unused, keep it
open.
RTS
65
DI
Request to send.
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
1.8V power domain.
If unused, keep it
open.
DTR
66
DI
Data terminal ready,
sleep mode control.
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
1.8V power domain.
Pull-up by default.
Low level wakes up
the module.
If unused, keep it
open.
TXD
67
VOLmax=0.45V
VOHmin=1.35V
RXD
68
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
Debug UART Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
DBG_TXD
12
DO
Transmit data.
VOLmax=0.45V
VOHmin=1.35V
1.8V power domain.
If unused, keep it
open.
DBG_RXD
11
DI
Receive data.
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
1.8V power domain.
If unused, keep it
open.
ADC Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
ADC0
45
AI
General purpose
analog to digital
converter.
Voltage range:
0.3V to VBAT_BB
If unused, keep it
open.
ADC1
44
AI
General purpose
analog to digital
converter.
Voltage range:
0.3V to VBAT_BB
If unused, keep it
open.
PCM Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
EC25-A User Manual
1.8V power domain.
DO Transmit data.
If unused, keep it
open.
DI Receive data.
1.8V power domain.
If unused, keep it
open.
EC25-A_User_Manual Confidential / Released 19 / 7
0
LTE Module
PCM_IN
24
DI
PCM data input.
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
1.8V power domain.
If unused, keep it
open.
PCM_OUT
25
DO
PCM data output.
VOLmax=0.45V
VOHmin=1.35V
1.8V power domain.
If unused, keep it
open.
PCM_SYNC
26
IO
PCM data frame
sync signal.
VOLmax=0.45V
VOHmin=1.35V
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
1.8V power domain.
In master mode, it is
an output signal. In
slave mode, it is an
input signal.
If unused, keep it
open.
PCM_CLK
27
VOLmax=0.45V
VOHmin=1.35V
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
I2C Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
I2C_SCL
41
OD
I2C serial clock.
Used for external
codec.
External pull-up
resistor is required.
1.8V only. If unused,
keep it open.
I2C_SDA
42
OD
I2C serial data.
Used for external
codec.
External pull-up
resistor is required.
1.8V only. If unused,
keep it open.
RF Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
ANT_DIV
35
AI
Diversity antenna.
50ohm impedance.
If unused, keep it
open.
ANT_MAIN
49
IO
Main antenna.
50ohm impedance.
ANT_GNSS
47
AI
GNSS antenna.
50ohm impedance.
If unused, keep it
open.
GPIO Pins
Pin Name
Pin No.
DC Characteristics
EC25-A User Manual
1.8V power domain.
In master mode, it is
an output signal. In
IO PCM clock.
slave mode, it is an
input signal.
If unused, keep it
open.
EC25-A_User_Manual Confidential / Released 20 / 7
I/O Description
Comment
0
LTE Module
WAKEUP_IN
1
DI
Sleep mode control.
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
1.8V power domain.
Pull-up by default.
Low level wakes up
the module. If
unused, keep it open.
W_DISABLE#
4
DI
Airplane mode
control.
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
1.8V power domain.
Pull-up by default.
In low voltage level,
module can enter into
airplane mode. If
unused, keep it open.
AP_READY
2
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
RESERVED Pins
Pin Name
Pin No.
DC Characteristics
RESERVED
3, 18, 23,
28~34,
37~40, 43,
55, 73~84,
113~144
Reserved.
Keep these pins
unconnected.
Mode
Details
Normal
Operation
Idle
Software is active. The module has registered to the network, and it is
ready to send and receive data.
Talk/Data
Network connection is ongoing. In this mode, the power consumption is
decided by network setting and data transfer rate.
Minimum
Functionality
Mode
AT+CFUN command can set the module entering into a minimum functionality mode
without removing the power supply. In this case, both RF function and USIM card will be
invalid.
Airplane
Mode
AT+CFUN command or W_DISABLE# pin can set the module entering into airplane
mode. In this case, RF function will be invalid.
EC25-A User Manual
Application
DI
processor sleep
state detection.
I/O Description
1.8V power domain.
If unused, keep it
open.
Comment
3.4. Operating Modes
The table below briefly summarizes the various operating modes referred in the following chapters.
Table 5: Overview of Operating Modes
EC25-A_User_Manual Confidential / Released 21 / 7
0
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