Quectel Wireless Solutions 201708EC25E User Manual

EC25Hard ware es ig n

LTE Module Series

Rev. EC25_H ardware_ Design_V1.3

Date: 2017-01-24

www.quectel.com

LTE Module Series

EC25Hardware Design

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: [phone]

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QUECTEL OFFERS THEINFORMATION 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.

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Copyright © Quectel Wireless Solutions Co., Ltd. 2017. All rights reserved.

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About the Document

History

	Revision	Date		Author	Description
1.0		2016-04-01		Woody WU	Initial
					1.	Updated EC25 series frequency bands in Table 1.
					2.	Updated transmitting power, supported maximum
						baud rate of main UART/internal protocols/USB
						drivers of USB interface, firmware upgrade and
						temperature range in Table 2.
					3.	Updated timing of turning on module in Figure 12.
					4.	Updated timing of turning off module in Figure 13.
1.1		2016-09-22		Lyndon LIU/	5.	Updated timing of resetting module in Figure 16.
				Frank WANG	6.	Updated supported baud rates of main UART in
						Chapter 3.11.
					7.	Added notes for ADC interface in Chapter 3.13.
					8.	Updated GNSS performance in Table 21.
					9.	Updated operating frequencies of module in Table 23.
					10.	Added current consumption in Chapter 6.4.
					11.	Updated RF output power in Chapter 6.5.
					12.	Added RF receiving sensitivity in Chapter 6.6.
					1.	Added SGMII and WLAN interfaces in Table 2.
					2.	Updated function diagram in Figure 1.
					3.	Updated pin assignment (Top View) in Figure 2.
					4.	Added description of SGMII and WLAN interfaces in
1.2		2016-11-04		Lyndon LIU/		Table 4.
				Michael ZHANG	5.	Added SGMII interface in Chapter 3.17.
					6.	Added WLAN interface in Chapter 3.18.
					7.	Added USB_BOOT interface in Chapter 3.19.
					8.	Added reference design of RF layout in Chapter 5.1.4.
					9.	Added note about SIMO in Chapter 6.6.
1.3		2017-01-24		Lyndon LIU/	1.	Updated function diagram in Figure 1.
				Frank WANG	2.	Updated pin assignment (top view) in Figure 2.
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3.Added BT interface in Chapter 3.18.2.

4.Updated GNSS performance in Table 24.

5.Updated reference circuit of wireless connectivity interfaces with FC20 module in Figure 29.

6.Updated current consumption of EC25-E module in Table 33.

7.Updated EC25-A conducted RF receiving sensitivity in Table 38.

8.AddedEC25-J conducted RF receiving sensitivity in Table 40.

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Contents

About the Document ................................................................................................................................					2
Contents		....................................................................................................................................................			4
Table Index ...............................................................................................................................................					6
Figure Index..............................................................................................................................................					8
1	Introduction .....................................................................................................................................				10
	1.1. ..................................................................................................................	Safety Information			11
2	Product .............................................................................................................................Concept				12
	2.1. ..............................................................................................................	General Description			12
	2.2. .........................................................................................................................	Key Features			13
	2.3. ...............................................................................................................	Functional Diagram			15
	2.4. ...................................................................................................................	Evaluation Board			16
3	Application .......................................................................................................................Interface				17
	3.1. ..............................................................................................................	General Description			17
	3.2. .....................................................................................................................	Pin Assignment			18
	3.3. ......................................................................................................................	Pin Description			19
	3.4. ..................................................................................................................	Operating Modes			28
	3.5. ........................................................................................................................	Power Saving			28
	3.5.1. ..................................................................................................................		Sleep Mode		28
	...............................................................................................	3.5.1.1. UART Application			28
	.......................................	3.5.1.2. USB Application with USB Remote Wakeup Function			29
	..........................	3.5.1.3. USB Application with USB Suspend/Resume and RI Function			30
	...............................................	3.5.1.4. USB Application without USB Suspend Function			31
	3.5.2. ..............................................................................................................		Airplane Mode		31
	3.6. ........................................................................................................................	Power Supply			32
	3.6.1. .......................................................................................................		Power Supply Pins		32
	3.6.2. ................................................................................................		Decrease Voltage Drop		33
	3.6.3. ............................................................................Reference Design for Power Supply				34
	3.6.4. ............................................................................................Monitor the Power Supply				34
	3.7. .....................................................................................................	Turn on and off Scenarios			34
	3.7.1. ...........................................................................Turn on Module Using the PWRKEY				34
	3.7.2. ............................................................................................................		Turn off Module		36
	...........................................................	3.7.2.1. Turn off Module Using the PWRKEY Pin			36
	.................................................................	3.7.2.2. Turn off Module Using AT Command			37
	3.8. ..................................................................................................................	Reset the Module			37
	3.9. .............................................................................................................	USIM Card Interface			39
	3.10. ........................................................................................................................	USB Interface			41
	3.11. ....................................................................................................................	UART Interfaces			43
	3.12. ........................................................................................................	PCM and I2C Interfaces			45
	3.13. ........................................................................................................................	ADC Function			47
	3.14. .....................................................................................................	Network Status Indication			48
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	3.15.	STATUS ................................................................................................................................			49
	3.16.	Behavior of the RI .................................................................................................................			50
	3.17.	SGMII Interface.....................................................................................................................			51
	3.18.	Wireless Connectivity Interfaces ...........................................................................................			53
	3.18.1.		WLAN Interface ...........................................................................................................		55
	3.18.2.		BT Interface*................................................................................................................		56
	3.19.	USB_BOOT Interface............................................................................................................			56
4	GNSS Receiver ................................................................................................................................				58
	4.1.	General Description ..............................................................................................................			58
	4.2.	GNSS Performance ..............................................................................................................			58
	4.3.	Layout Guidelines .................................................................................................................			59
5	Antenna Interfaces..........................................................................................................................				60
	5.1.	Main/Rx-diversity Antenna Interface .....................................................................................			60
	5.1.1.		Pin Definition................................................................................................................		60
	5.1.2.		Operating Frequency ...................................................................................................		60
	5.1.3. Reference Design of RF Antenna Interface .................................................................				61
	5.1.4. Reference Design of RF Layout...................................................................................				62
	5.2.	GNSS Antenna Interface.......................................................................................................			64
	5.3.	Antenna Installation ..............................................................................................................			65
	5.3.1.		Antenna Requirement..................................................................................................		65
	5.3.2. Recommended RF Connector for Antenna Installation................................................				66
6	Electrical, Reliability and Radio Characteristics ..........................................................................				68
	6.1.	Absolute Maximum Ratings ..................................................................................................			68
	6.2.	Power Supply Ratings...........................................................................................................			69
	6.3.	Operating Temperature .........................................................................................................			69
	6.4.	Current Consumption............................................................................................................			70
	6.5.	RF Output Power ..................................................................................................................			73
	6.6.	RF Receiving Sensitivity .......................................................................................................			74
	6.7.	Electrostatic Discharge .........................................................................................................			76
7	Mechanical Dimensions..................................................................................................................				77
	7.1.	Mechanical Dimensions of the Module..................................................................................			77
	7.2.	Recommended Footprint.......................................................................................................			79
	7.3.	Design Effect Drawings of the Module ..................................................................................			80
8	Storage, Manufacturing and Packaging........................................................................................				81
	8.1.	Storage .................................................................................................................................			81
	8.2.	Manufacturing and Soldering ................................................................................................			82
	8.3.	Packaging .............................................................................................................................			83
9	Appendix A References..................................................................................................................				84
10	Appendix B GPRS Coding Schemes .............................................................................................				88
11	Appendix C GPRS Multi-slot Classes............................................................................................				89
12	Appendix D EDGE Modulation and Coding Schemes..................................................................				90

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Table Index
TABLE 1: FREQUENCY BANDS OF EC25 SERIES MODULE........................................................................	12
TABLE 2: KEY FEATURES OF EC25 MODULE...............................................................................................	13
TABLE 3: I/O PARAMETERS DEFINITION.......................................................................................................	19
TABLE 4: PIN DESCRIPTION...........................................................................................................................	19
TABLE 5: OVERVIEW OF OPERATING MODES.............................................................................................	28
TABLE 6: VBAT AND GND PINS.......................................................................................................................	32
TABLE 7: PWRKEY PIN DESCRIPTION ..........................................................................................................	35
TABLE 8: RESET_N PIN DESCRIPTION .........................................................................................................	37
TABLE 9: PIN DEFINITION OF THE USIM CARD INTERFACE ......................................................................	39
TABLE 10: PIN DESCRIPTION OF USB INTERFACE .....................................................................................	41
TABLE 11: PIN DEFINITION OF THE MAIN UART INTERFACE .....................................................................	43
TABLE 12: PIN DEFINITION OF THE DEBUG UART INTERFACE.................................................................	43
TABLE 13:LOGIC LEVELS OF DIGITAL I/O .....................................................................................................	44
TABLE 14: PIN DEFINITION OF PCM AND I2C INTERFACES .......................................................................	46
TABLE 15: PIN DEFINITION OF THE ADC ......................................................................................................	48
TABLE 16: CHARACTERISTIC OF THE ADC ..................................................................................................	48
TABLE 17: PIN DEFINITION OF NETWORK CONNECTION STATUS/ACTIVITY INDICATOR......................	48
TABLE 18: WORKING STATE OF THE NETWORK CONNECTION STATUS/ACTIVITY INDICATOR ...........	49
TABLE 19: PIN DEFINITION OF STATUS ........................................................................................................	50
TABLE 20: BEHAVIOR OF THE RI ...................................................................................................................	50
TABLE 21: PIN DEFINITION OF THE SGMII INTERFACE ..............................................................................	51
TABLE 22: PIN DEFINITION OF WIRELESS CONNECTIVITY INTERFACES................................................	53
TABLE 23: PIN DEFINITION OF USB_BOOT INTERFACE .............................................................................	56
TABLE 24: GNSS PERFORMANCE .................................................................................................................	58
TABLE 25: PIN DEFINITION OF THE RF ANTENNA.......................................................................................	60
TABLE 26: MODULE OPERATING FREQUENCIES........................................................................................	60
TABLE 27: PIN DEFINITION OF GNSS ANTENNA INTERFACE.....................................................................	64
TABLE 28: GNSS FREQUENCY.......................................................................................................................	64
TABLE 29: ANTENNA REQUIREMENTS..........................................................................................................	65
TABLE 30: ABSOLUTE MAXIMUM RATINGS ..................................................................................................	68
TABLE 31: THE MODULE POWER SUPPLY RATINGS ..................................................................................	69
TABLE 32: OPERATING TEMPERATURE........................................................................................................	69
TABLE 33: EC25-E CURRENT CONSUMPTION .............................................................................................	70
TABLE 34: EC25-A CURRENT CONSUMPTION .............................................................................................	72
TABLE 35: GNSS CURRENT CONSUMPTION OF EC25 SERIES MODULE.................................................	73
TABLE 36: RF OUTPUT POWER .....................................................................................................................	73
TABLE 37: EC25-E CONDUCTED RF RECEIVING SENSITIVITY..................................................................	74
TABLE 38: EC25-A CONDUCTED RF RECEIVING SENSITIVITY ..................................................................	74
TABLE 39: EC25-V CONDUCTED RF RECEIVING SENSITIVITY..................................................................	75
TABLE 40: EC25-J CONDUCTED RF RECEIVING SENSITIVITY...................................................................	75
TABLE 41: ELECTROSTATICS DISCHARGE CHARACTERISTICS ...............................................................	76

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TABLE 42: RELATED DOCUMENTS................................................................................................................	84
TABLE 43: TERMS AND ABBREVIATIONS......................................................................................................	84
TABLE 44: DESCRIPTION OF DIFFERENT CODING SCHEMES ..................................................................	88
TABLE 45: GPRS MULTI-SLOT CLASSES ......................................................................................................	89
TABLE 46: EDGE MODULATION AND CODING SCHEMES...........................................................................	90

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Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ...............................................................................................................	16
FIGURE 2: PIN ASSIGNMENT (TOP VIEW) ....................................................................................................	18
FIGURE 3: SLEEP MODE APPLICATION VIA UART.......................................................................................	29
FIGURE 4: SLEEP MODE APPLICATION WITH USB REMOTE WAKEUP ....................................................	30
FIGURE 5: SLEEP MODE APPLICATION WITH RI .........................................................................................	30
FIGURE 6: SLEEP MODE APPLICATION WITHOUT SUSPEND FUNCTION ................................................	31
FIGURE 7: POWER SUPPLY LIMITS DURING BURST TRANSMISSION......................................................	33
FIGURE 8: STAR STRUCTURE OF THE POWER SUPPLY............................................................................	33
FIGURE 9: REFERENCE CIRCUIT OF POWER SUPPLY ..............................................................................	34
FIGURE 10: TURN ON THE MODULE USING DRIVING CIRCUIT.................................................................	35
FIGURE 11: TURN ON THE MODULE USING KEYSTROKE..........................................................................	35
FIGURE 12: TIMING OF TURNING ON MODULE ...........................................................................................	36
FIGURE 13: TIMING OF TURNING OFF MODULE .........................................................................................	37
FIGURE 14: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ......................................	38
FIGURE 15: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON ......................................................	38
FIGURE 16: TIMING OF RESETTING MODULE .............................................................................................	38
FIGURE 17: REFERENCE CIRCUIT OF USIM CARD INTERFACE WITH AN 8-PIN USIM CARD
CONNECTOR....................................................................................................................................................	40
FIGURE 18: REFERENCE CIRCUIT OF USIM CARD INTERFACE WITH A 6-PIN USIM CARD CONNECTOR
...........................................................................................................................................................................	40
FIGURE 19: REFERENCE CIRCUIT OF USB APPLICATION .........................................................................	42
FIGURE 20: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ...................................................................	44
FIGURE 21: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT ..............................................................	45
FIGURE 22: PRIMARY MODE TIMING ............................................................................................................	46
FIGURE 23: AUXILIARY MODE TIMING ..........................................................................................................	46
FIGURE 24: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC ....................................	47
FIGURE 25: REFERENCE CIRCUIT OF THE NETWORK INDICATOR..........................................................	49
FIGURE 26: REFERENCE CIRCUITS OF STATUS.........................................................................................	50
FIGURE 27: SIMPLIFIED BLOCK DIAGRAM FOR ETHERNET APPLICATION .............................................	52
FIGURE 28: REFERENCE CIRCUIT OF SGMII INTERFACE WITH PHY AR8033 APPLICATION.................	52
FIGURE 29: REFERENCE CIRCUIT OF WIRELESS CONNECTIVITY INTERFACES WITH FC20 MODULE
...........................................................................................................................................................................	55
FIGURE 30: REFERENCE CIRCUIT OF USB_BOOT INTERFACE ................................................................	57
FIGURE 31: REFERENCE CIRCUIT OF RF ANTENNA INTERFACE .............................................................	61
FIGURE 32: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB......................................................................	62
FIGURE 33: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB..................................................	62
FIGURE 34: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE
GROUND)..........................................................................................................................................................	63
FIGURE 35: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE
GROUND)..........................................................................................................................................................	63
FIGURE 36: REFERENCE CIRCUIT OF GNSS ANTENNA.............................................................................	64

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FIGURE 37: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM)	................................................ 66
FIGURE 38: MECHANICALS OF UF.L-LP CONNECTORS .............................................................................	66
FIGURE 39: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ...........................................................	67
FIGURE 40: MODULE TOP AND SIDE DIMENSIONS.....................................................................................	77
FIGURE 41: MODULE BOTTOM DIMENSIONS (BOTTOM VIEW) .................................................................	78
FIGURE 42: RECOMMENDED FOOTPRINT (TOP VIEW) ..............................................................................	79
FIGURE 43: TOP VIEW OF THE MODULE......................................................................................................	80
FIGURE 44: BOTTOM VIEW OF THE MODULE..............................................................................................	80
FIGURE 45: REFLOW SOLDERING THERMAL PROFILE..............................................................................	82
FIGURE 46: TAPE AND REEL SPECIFICATIONS ...........................................................................................	83

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1 Introduction

This document defines the EC25module 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 note and user guide, you can use EC25 module to design and set up mobile applications easily.

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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 incorporate these guidelines into all manuals supplied with the product. If not so, Quectelassumes no liability for the customer’s failure to comply with these precautions.

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 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 sensitive medical equipment.

Cellular terminals or mobiles operatingover radio frequency signal and cellular network cannot be guaranteed to connect in all conditions, for example no mobile fee or with an invalid USIM/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 potentially explosive atmospheres, obey all posted signs to turn off wireless devices such as your phone or other cellular terminals. Areas with potentially 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 is a series of LTE-FDD/LTE-TDD/WCDMA/GSM wireless communication module with receive diversity, which provides data connectivity on LTE-FDD,LTE-TDD,DC-HSPA+, HSPA+, HSDPA, HSUPA, WCDMA,EDGE andGPRSnetworks. It also provides GNSS1) and voice functionality2) for your specific application.EC25 contains fivevariants:EC25-E, EC25-A, EC25-V, EC25-Jand EC25-AU. You can choose a dedicated type based on the region or operator. The following table shows the frequency bands of EC25 series module.

Table 1: Frequency Bands of EC25 Series Module

Modules2)

LTE Bands

3G Bands

GSM

Rx-

GNSS1)

diversity

FDD:B1/B3/B5/B7/B8/

WCDMA:

EC25-E

B20

900/1800

Supported

B1/B5/B8

TDD: B38/B40/B41

EC25-A

FDD: B2/B4/B12

WCDMA:

Not supported

Supported

GPS,

B2/B4/B5

GLONASS,

EC25-V

FDD: B4/B13

Not supported

Not supported

Supported

BeiDou/

Compass,

FDD: B1/B3/B8/B18/B19/

WCDMA:

Galileo,

EC25-J

B26

B1/B6/B8/

Not supported

Supported

QZSS

TDD: B41

B19

FDD: B1/B2/B3/B4/B5/B7/

WCDMA:

850/900/

EC25-AU3)

B8/B28

Supported

B1/B2/B5/B8

1800/1900

TDD: B40

NOTES

1.

1) GNSS function is optional.

2.

2) EC25

series module (EC25-E/EC25-A/EC25-V/EC25-J/EC25-AU)

includes Data-only and

Telematics versions. Data-only version does not support voice function, while Telematics version

supports it.

3.

3) B2 band on EC25-AU module does not support Rx-diversity.

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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, tablet PC, etc.

EC25 is an SMD type module which can be embedded in applications through its 144-pin pads, including 80 LCC signal pads and 64 other pads.

2.2. Key Features

The following table describes the detailed features of EC25 module.

Table 2: Key Features of EC25 Module

Feature

Power Supply

Transmitting Power

LTE Features

WCDMA Features

GSMFeatures

Details

Supply voltage: 3.3V~4.3VTypical supply voltage: 3.8V

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 (23dBm+1/-3dB) for WCDMA bands Class 3 (23dBm+1/-3dB) for LTE-FDD band5 Class 3 (22.5dBm+1/-3dB) for LTE-FDD band7 Class 3 (23dBm+1/-3dB) for LTE-TDD bands Support up to non-CA CAT4

Support 1.4 to 20MHz RF bandwidth Support MIMO in DL direction

FDD: Max 50Mbps (UL), 150Mbps (DL) TDD: Max 35Mbps (UL), 130Mbps (DL) Support 3GPP R8 DC-HSPA+

Support 16-QAM, 64-QAM and QPSKmodulation 3GPP R6 CAT6 HSUPA: Max 5.76Mbps (UL) 3GPP R8 CAT24 DC-HSPA+: Max 42Mbps (DL)

R99:

CSD: 9.6kbps, 14.4kbps

GPRS:

Support GPRS multi-slot class 12 (12 by default) Coding scheme: CS-1, CS-2, CS-3 and CS-4 Maximum of four Rx time slots per frame

EDGE:

Support EDGE multi-slot class 12 (12 by default)

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Internet Protocol Features

SMS

Support GMSK and 8-PSK for different MCS (Modulation and Coding Scheme)

Downlink coding schemes: CS 1-4 and MCS 1-9 Uplink coding schemes: CS 1-4 and MCS 1-9

SupportTCP/UDP/PPP/FTP/HTTP/NTP/PING/QMI/HTTPS*/SMTP*/MMS*

/FTPS*/SMTPS*/SSL*protocols

Support the protocols PAP (Password Authentication Protocol) and CHAP (Challenge Handshake Authentication Protocol) usually used for PPP connections

Text and PDU mode Point to point MO and MT SMS cell broadcast

SMS storage: ME by default

USIM Interface	Support USIM/SIM card: 1.8V, 3.0V
	Support one digital audio interface: PCM interface
	GSM: HR/FR/EFR/AMR/AMR-WB
Audio Features	WCDMA: AMR/AMR-WB
	LTE: AMR/AMR-WB
	Support echo cancellation and noise suppression
	Used for audio function with external codec
	Support 8-bit A-law*, μ-law*and 16-bit linear data formats
PCM Interface	Support long frame synchronization and short frame synchronization
	Support master and slave modes, but must be the master in long frame
	synchronization
	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
USB Interface	output, software debugging, firmware upgrade and voiceover USB*
	Support USB drivers for: Windows XP, Windows Vista, Windows 7,
	Windows 8/8.1, Windows 10, Linux 2.6 or later, Android
	4.0/4.2/4.4/5.0/5.1/6.0
	Main UART:
	Used for AT command communication and data transmission
	Baud rate reach up to 3000000bps, 115200bps by default
UART Interface	Support RTS and CTS hardware flow control
	Debug UART:
	Used for Linux console, log output
	115200bps baud rate
SGMII Interface	Support 10/100/1000Mbps Ethernet connectivity
Wireless Connectivity	Support a low-power SDIO 3.0 interface for WLAN and UART/PCM
Interfaces	interface for Bluetooth*

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Rx-diversity

GNSS Features

AT Commands

Network Indication

Antenna Interface

Physical Characteristics

Temperature Range

Firmware Upgrade

RoHS

NOTES

Support LTE/WCDMA Rx-diversity

Gen8CLite of Qualcomm Protocol: NMEA 0183

Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT commands

Two pins including NET_MODE and NET_STATUS to indicate network connectivity status

Including main antenna interface (ANT_MAIN), Rx-diversityantenna interface (ANT_DIV) and GNSS antenna interface (ANT_GNSS)

Size: 32.0±0.15×29.0±0.15×2.4±0.2mm Weight: approx. 4.9g

Operation temperature range: -35°C ~ +75°C1) Extended temperature range: -40°C ~ +85°C2)

USB interface and DFOTA*

All hardware components are fully compliant with EU RoHS directive

1. 1) Within operation temperature range, the module is 3GPP compliant.

2. 2) Within extended temperature range, the module remains the ability to establish and maintain a voice, SMS, data transmission, emergency call, etc. There is no unrecoverable malfunction. There are also no effects on radio spectrum and no harm to radio network. Only one or more parameters like Pout might reduce in their value and exceed the specified tolerances. When the temperature returns to the normal operating temperature levels, the module will meet 3GPP compliant again.

3.“*” means under development.

2.3. Functional Diagram

The following figure shows a block diagram of EC25 and illustrates the major functional parts.

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Power management

Baseband

DDR+NAND flash

Radio frequency

Peripheral interfaces

		ANT_MAIN	ANT_GNSS ANT_DIV
		Switch	SAW	Switch
		Duplex	LNA
VBAT_RF				SAW
		PA
	APT
		PRx		DRx
		Tx
		Transceiver			NAND
					DDR2
					SDRAM
		IQ	Control
VBAT_BB	PMIC
		Control
PWRKEY
			Baseband
RESET_N
ADCs
STATUS		19.2M
		XO
	VDD_EXT	USB USIM	PCM SGMII WLAN	I2C	UART GPIOs	BT

Figure 1: Functional Diagram

2.4. Evaluation Board

In order to help youto 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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3 Application Interface

3.1. General Description

EC25 is equipped with 80-pin SMT pads plus 64-pin ground pads and reserved pads that can beconnected 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 interfaces

PCM interface

ADC interface

Status indication

SGMII interface

Wireless connectivityinterfaces

USB_BOOT interface

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3.2. Pin Assignment

The following figure shows the pin assignment of EC25 module.

	WAKEUP_IN1)	1
	AP_READY	2	129	117
	RESERVED	3
			130	118	108
	W_DISABLE#	4
	NET_MODE1)	5	131	119
	NET_STATUS	6	132	120
	VDD_EXT	7			109
	RESERVED	141	133	121
	RESERVED	142	134	122
	GND	8			110
	GND	9	135	123
	USIM_GND	10	136	124
	DBG_RXD	11
					111
	DBG_TXD	12	137	125
	USIM_PRESENCE	13	138	126
	USIM_VDD	14
	USIM_DATA	15	139	127	112
	USIM_CLK	16	140	128
	USIM_RST	17
	RESERVED	18

																																								GND
																																							54
																																								GND
																																							53
																																								GND
		103					99									95						90						85											52
																																								GND
																																							51
																																								GND
																																							50
																																								ANT_MAIN
		104					100									96						91						86											49
																																								GND
																																							48
																																								RESERVED
																																							144
																																								RESERVED
							82			79			76				73																						143
		105
																																								ANT_GNSS
							83			80			77				74					92						87											47
																																								GND
							84			81			78				75																						46
																																								ADC0
																																							45
																																								ADC1
		106					101									97						93						88											44
																																							43	RESERVED
																																								I2C_SDA
																																							42
																																								I2C_SCL
		107					102									98						94						89											41
																																								BT_CTS
																																							40
																																								BT_RXD
																																							39
																																								BT_TXD
																																							38
																																								BT_RTS
																																							37

	GND Pins		Signal Pins		RESERVED Pins		SGMII Pins
	WLAN Pins		Power Pins		Bluetooth Pins

Figure 2: Pin Assignment (Top View)

NOTES

1. 1)meansthat these pins cannot be pulled up before startup.

2. 2) PWRKEY output voltage is 0.8V because of the diode drop in the Qualcomm chipset.

3.Pads 119~126 are SGMII function pins.

4.Pads 37~40, 118, 127 and 129~139 are wireless connectivity interfaces, among which pads 127 and 129~138 are WLAN function pins, and others are Bluetooth (BT) function pins. BT function is under development.

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5.Pads 24~27 are multiplexing pins used for audio design on EC25 module and BT function on FC20 module.

6.Keep all RESERVEDpins and unused pins unconnected.

7.GND pads 85~112 should be connected to ground in the design, and RESERVED pads 73~84should not be designed in schematic and PCB decal.

8.“ ”means these interface functions are only supported on Telematics version.

3.3. Pin Description

The following tables show the pin definition of EC25 modules.

Table 3: I/O Parameters Definition

Type	Description
IO	Bidirectional
DI	Digital input
DO	Digital output
PI	Power input
PO	Power output
AI	Analog input
AO	Analog output
OD	Open drain

Table 4: Pin Description

Power Supply

	Pin Name	Pin No.	I/O	Description	DC Characteristics	Comment
				Power supply for	Vmax=4.3V	It must be able to
	VBAT_BB	59,60	PI	module baseband	Vmin=3.3V	provide sufficient
				part	Vnorm=3.8V	current up to 0.8A.
				Power supply for	Vmax=4.3V	It must be able to
	VBAT_RF	57,58	PI		Vmin=3.3V	provide sufficient
				module RF part
					Vnorm=3.8V	current up to 1.8A in a

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									bursttransmission.
							Provide 1.8V for	Vnorm=1.8V	Power supply for
		VDD_EXT		7		PO			external GPIO’s pull up
							external circuit	IOmax=50mA
									circuits.
				8,9,19,22,3
		GND		6,46,48,50			Ground
				~54,56,72,
				85~112
		Turn on/off
		Pin Name		Pin No.		I/O	Description	DC Characteristics	Comment
								VIHmax=2.1V	The output voltage is
							Turnon/off the		0.8V because of the
		PWRKEY		21		DI		VIHmin=1.3V
							module		diode drop in the
								VILmax=0.5V
									Qualcomm chipset.
								VIHmax=2.1V
		RESET_N		20		DI	Reset the module	VIHmin=1.3V
								VILmax=0.5V
		Status Indication
		Pin Name		Pin No.		I/O	Description	DC Characteristics	Comment
							Indicate the module	The drive current	Require external
		STATUS		61		OD		should be less than	pull-up. If unused,
							operating status
								0.9mA.	keep it open.
									1.8V power domain.
							Indicate the module	VOHmin=1.35V	Cannot be pulled up
		NET_MODE		5		DO	network registration		before startup.
								VOLmax=0.45V
							mode		If unused, keep it
									open.
		NET_					Indicate the module	VOHmin=1.35V	1.8V power domain.
				6		DO	network activity		If unused, keep it
		STATUS						VOLmax=0.45V
							status		open.
		USB Interface
		Pin Name		Pin No.		I/O	Description	DC Characteristics	Comment
								Vmax=5.25V
		USB_VBUS		71		PI	USB detection	Vmin=3.0V
								Vnorm=5.0V
							USB differential data	Compliant with USB	Require differential
		USB_DP		69		IO		2.0 standard
							bus		impedance of 90ohm.
								specification.

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						USB differential data		Compliant with USB	Require differential
		USB_DM		70	IO			2.0 standard
						bus			impedance of 90ohm.
								specification.
		USIM Interface
		Pin Name		Pin No.	I/O Description			DC Characteristics	Comment
		USIM_GND		10		Specified ground for
						USIM card
								For 1.8V USIM:
								Vmax=1.9V
								Vmin=1.7V	Either 1.8V or 3.0V is
						Power supply for
		USIM_VDD		14	PO				supported by the
						USIM card		For 3.0V USIM:
									module automatically.
								Vmax=3.05V
								Vmin=2.7V
								IOmax=50mA
								For 1.8V USIM:
								VILmax=0.6V
								VIHmin=1.2V
								VOLmax=0.45V
						Data signal of USIM		VOHmin=1.35V
		USIM_DATA		15	IO
						card
								For 3.0V USIM:
								VILmax=1.0V
								VIHmin=1.95V
								VOLmax=0.45V
								VOHmin=2.55V
								For 1.8V USIM:
								VOLmax=0.45V
		USIM_CLK		16	DO	Clock signal of USIM		VOHmin=1.35V
						card
								For 3.0V USIM:
								VOLmax=0.45V
								VOHmin=2.55V
								For 1.8V USIM:
								VOLmax=0.45V
						Reset signal of		VOHmin=1.35V
		USIM_RST		17	DO
						USIM card
								For 3.0V USIM:
								VOLmax=0.45V
								VOHmin=2.55V
		USIM_		13	DI	USIM card insertion		VILmin=-0.3V	1.8V power domain.
		PRESENCE				detection		VILmax=0.6V	If unused, keep it
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							VIHmin=1.2V	open.
							VIHmax=2.0V
		UART Interface
		Pin Name		Pin No.	I/O	Description	DC Characteristics	Comment
							VOLmax=0.45V	1.8V power domain.
		RI		62	DO	Ring indicator		If unused, keep it
							VOHmin=1.35V
								open.
						Data carrier	VOLmax=0.45V	1.8V power domain.
		DCD		63	DO			If unused, keep it
						detection	VOHmin=1.35V
								open.
							VOLmax=0.45V	1.8V power domain.
		CTS		64	DO	Clear to send		If unused, keep it
							VOHmin=1.35V
								open.
							VILmin=-0.3V	1.8V power domain.
							VILmax=0.6V
		RTS		65	DI	Request to send		If unused, keep it
							VIHmin=1.2V
								open.
							VIHmax=2.0V
								1.8V power domain.
						Data terminal	VILmin=-0.3V	Pull-up by default.
							VILmax=0.6V	Low level wakes up
		DTR		66	DI	ready,sleep mode
							VIHmin=1.2V	the module.
						control
							VIHmax=2.0V	If unused, keep it
								open.
							VOLmax=0.45V	1.8V power domain.
		TXD		67	DO	Transmit data		If unused, keep it
							VOHmin=1.35V
								open.
							VILmin=-0.3V	1.8V power domain.
							VILmax=0.6V
		RXD		68	DI	Receive data		If unused, keep it
							VIHmin=1.2V
								open.
							VIHmax=2.0V
		Debug UART Interface
		Pin Name		Pin No.	I/O	Description	DC Characteristics	Comment
							VOLmax=0.45V	1.8V power domain.
		DBG_TXD		12	DO	Transmit data		If unused, keep it
							VOHmin=1.35V
								open.
							VILmin=-0.3V	1.8V power domain.
							VILmax=0.6V
		DBG_RXD		11	DI	Receive data		If unused, keep it
							VIHmin=1.2V
								open.
							VIHmax=2.0V

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		ADC Interface
		Pin Name		Pin No.	I/O	Description	DC Characteristics	Comment
						General purpose	Voltage range:	If unused, keep it
		ADC0		45	AI	analog to digital
							0.3V to VBAT_BB	open.
						converter
						General purpose	Voltage range:	If unused, keep it
		ADC1		44	AI	analog to digital
							0.3V to VBAT_BB	open.
						converter
		PCM Interface
		Pin Name		Pin No.	I/O	Description	DC Characteristics	Comment
							VILmin=-0.3V	1.8V power domain.
							VILmax=0.6V
		PCM_IN		24	DI	PCM data input		If unused, keep it
							VIHmin=1.2V
								open.
							VIHmax=2.0V
							VOLmax=0.45V	1.8V power domain.
		PCM_OUT		25	DO	PCM data output		If unused, keep it
							VOHmin=1.35V
								open.
							VOLmax=0.45V	1.8V power domain.
						PCM data frame	VOHmin=1.35V	In master mode, it is
							VILmin=-0.3V	an output signal. In
		PCM_SYNC		26	IO	synchronization		slave mode, it is an
							VILmax=0.6V
						signal		input signal.
							VIHmin=1.2V	If unused, keep it
							VIHmax=2.0V	open.
							VOLmax=0.45V	1.8V power domain.
							VOHmin=1.35V	In master mode, it is
								an output signal. In
							VILmin=-0.3V
		PCM_CLK		27	IO	PCM clock		slave mode, it is an
							VILmax=0.6V
								input signal.
							VIHmin=1.2V	If unused, keep it
							VIHmax=2.0V	open.
		I2C Interface
		Pin Name		Pin No.	I/O	Description	DC Characteristics	Comment
						I2C serial clock		External pull-up
								resistor is required.
		I2C_SCL		41	OD	Used for external
								1.8V only. If unused,
						codec.
								keep it open.
								External pull-up
		I2C_SDA		42	OD	I2C serial dataUsed		resistor is required.
						for external codec.		1.8V only. If unused,

keep it open.

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		SGMII Interface
		Pin Name		Pin No.	I/O	Description	DC Characteristics Comment
							For 1.8V:
							VOLmax=0.45V	1.8V/2.85V power
							VOHmin=1.4V
		EPHY_RST_						domain.
				119	DO	Ethernet PHY reset
		N					For 2.85V:	If unused, keep it
								open.
							VOLmax=0.35V
							VOHmin=2.14V
							VILmin=-0.3V	1.8V power domain.
						Ethernet PHY	VILmax=0.6V
		EPHY_INT_N 120			DI			If unused, keep it
						interrupt	VIHmin=1.2V
								open.
							VIHmax=2.0V
							For 1.8V:
							VOLmax=0.45V
							VOHmin=1.4V
							VILmax=0.58V	1.8V/2.85V power
						SGMII MDIO	VIHmin=1.27V
		SGMII_						domain.
				121	IO	(Management Data
		MDATA						If unused, keep it
						Input/Output) data	For 2.85V:
								open.
							VOLmax=0.35V
							VOHmin=2.14V
							VILmax=0.71V
							VIHmin=1.78V
							For 1.8V:
							VOLmax=0.45V	1.8V/2.85V power
						SGMII MDIO	VOHmin=1.4V
		SGMII_						domain.
				122	DO	(Management Data
		MCLK						If unused, keep it
						Input/Output) clock	For2.85V:
								open.
							VOLmax=0.35V
							VOHmin=2.14V
								Configurable power
								source.
								1.8V/2.85V power
		USIM2_VDD		128	PO	SGMII MDIO pull-up		domain.
						power source		External pull-up for
								SGMII MDIO pins.
								If unused, keep it
								open.
		SGMII_TX_M		123	AO	SGMII transmission		If unused, keep it
						- minus		open.
		SGMII_TX_P		124	AO	SGMII transmission		If unused, keep it

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						- plus		open.
		SGMII_RX_P		125	AI	SGMII receiving		If unused, keep it
						- plus		open.
		SGMII_RX_M 126			AI	SGMII receiving		If unused, keep it
						-minus		open.
		Wireless Connectivity Interfaces
		Pin Name		Pin No.	I/O	Description	DC Characteristics	Comment
							VOLmax=0.45V
							VOHmin=1.35V	1.8V power domain.
		SDC1_					VILmin=-0.3V
				129	IO	SDIO data bus D3		If unused, keep it
		DATA3					VILmax=0.6V
								open.
							VIHmin=1.2V
							VIHmax=2.0V
							VOLmax=0.45V
							VOHmin=1.35V	1.8V power domain.
		SDC1_					VILmin=-0.3V
				130	IO	SDIO data bus D2		If unused, keep it
		DATA2					VILmax=0.6V
								open.
							VIHmin=1.2V
							VIHmax=2.0V
							VOLmax=0.45V
							VOHmin=1.35V	1.8V power domain.
		SDC1_					VILmin=-0.3V
				131	IO	SDIO data bus D1		If unused, keep it
		DATA1					VILmax=0.6V
								open.
							VIHmin=1.2V
							VIHmax=2.0V
							VOLmax=0.45V
							VOHmin=1.35V	1.8V power domain.
		SDC1_					VILmin=-0.3V
				132	IO	SDIO data bus D0		If unused, keep it
		DATA0					VILmax=0.6V
								open.
							VIHmin=1.2V
							VIHmax=2.0V
							VOLmax=0.45V	1.8V power domain.
		SDC1_CLK		133	DO	SDIO clock		If unused, keep it
							VOHmin=1.35V
								open.
							VOLmax=0.45V	1.8V power domain.
		SDC1_CMD		134	DO	SDIO command		If unused, keep it
							VOHmin=1.35V
								open.
						External power	VOLmax=0.45V	1.8V power domain.
		PM_ENABLE		127	DO			If unused, keep it
						control	VOHmin=1.35V
								open.
		WAKE_ON_		135	DI	Wake up the host	VILmin=-0.3V	1.8V power domain.
		WIRELESS				(EC25 module) by	VILmax=0.6V	Active low.
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						FC20 module.	VIHmin=1.2V	If unused, keep it
							VIHmax=2.0V	open.
						WLAN function		1.8V power domain.
							VOLmax=0.45V	Active high.
		WLAN_EN		136	DO	control via FC20
							VOHmin=1.35V	If unused, keep it
						module
								open.
							VILmin=-0.3V	1.8V power domain.
		COEX_UART				LTE/WLAN&BT	VILmax=0.6V
				137	DI			If unused, keep it
		_RX				coexistence signal	VIHmin=1.2V	open.
							VIHmax=2.0V
		COEX_UART				LTE/WLAN&BT	VOLmax=0.45V	1.8V power domain.
				138	DO			If unused, keep it
		_TX				coexistence signal	VOHmin=1.35V	open.
		WLAN_SLP_		118	DO	WLAN sleep clock		If unused, keep it
		CLK						open.
							VILmin=-0.3V	1.8V power domain.
						BT UART request to	VILmax=0.6V
		BT_RTS*		37	DI			If unused, keep it
						send	VIHmin=1.2V
								open.
							VIHmax=2.0V
						BT UART transmit	VOLmax=0.45V	1.8V power domain.
		BT_TXD*		38	DO			If unused, keep it
						data	VOHmin=1.35V
								open.
							VILmin=-0.3V	1.8V power domain.
						BT UART receive	VILmax=0.6V
		BT_RXD*		39	DI			If unused, keep it
						data	VIHmin=1.2V
								open.
							VIHmax=2.0V
						BT UART clear to	VOLmax=0.45V	1.8V power domain.
		BT_CTS*		40	DO			If unused, keep it
						send	VOHmin=1.35V
								open.
						BT function control	VOLmax=0.45V	1.8V power domain.
		BT_EN*		139	DO			If unused, keep it
						via FC20 module	VOHmin=1.35V
								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	50 ohm impedance	If unused, keep it
								open.

GPIO Pins

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		Pin Name		Pin No.		I/O	Description	DC Characteristics	Comment
									1.8V power domain.
								VILmin=-0.3V	Cannot be pulled up
									before startup.
								VILmax=0.6V
		WAKEUP_IN		1		DI	Sleep mode control		Low level wakes up
								VIHmin=1.2V
									the module.
								VIHmax=2.0V
									If unused, keep it
									open.
									1.8V power domain.
								VILmin=-0.3V	Pull-up by default.
									In low voltage level,
							Airplane mode	VILmax=0.6V
		W_DISABLE#		4		DI			module can enter into
							control	VIHmin=1.2V
									airplane mode.
								VIHmax=2.0V
									If unused, keep it
									open.
							Application	VILmin=-0.3V	1.8V power domain.
								VILmax=0.6V
		AP_READY		2		DI	processor sleep		If unused, keep it
								VIHmin=1.2V
							state detection		open.
								VIHmax=2.0V
		USB_BOOT Interface
		Pin Name		Pin No.		I/O	Description	DC Characteristics	Comment
								VILmin=-0.3V	1.8V power domain.
							Force the module to	VILmax=0.6V
		USB_BOOT		115		DI			If unused, keep it
							boot from USB port	VIHmin=1.2V
									open.
								VIHmax=2.0V
		RESERVED Pins
		Pin Name		Pin No.		I/O	Description	DC Characteristics	Comment
				3, 18, 23,
				28~34, 43,
		RESERVED		55, 73~84,			Reserved		Keep these pins
				113, 114,					unconnected.
				116, 117,
				140~144

NOTES

1.“*” means under development.

2.Pads 24~27 are multiplexing pins used for audio design on EC25 module and BT function on FC20 module.

EC25_Hardware_DesignConfidential / Released

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