Quectel Wireless Solutions 201202M35 Users Manual

M35

Quectel Cellular Engine

Hardware Design

M35_HD_V1.0

M35 Hardware Design

		Document Title		M35 Hardware Design
		Revision		1.0
				2012-02-06
		Date
				Released
		Status
				M35_HD_V1.0
		Document Control ID
	General Notes
		Quectel
	Quectel offers this information as a service to its custom rs, to support application and
	engineering efforts that use the products designed by Qu c l. The information provided is based
	upon requirements specifically provided for ustomers of Qu c					l. Qu ct	has not undertaken any
Confidential
	independent search for additional information, relevant				o any information that m y be n the
	customer’s possession. Furth rmor , syst m valida ion of				his product d signed by Quec el w thin
	a larger electronic system r mains the r sponsibili y of				he customer or		he cus omer’s system
	integrator. All specifications s ppli d h r in are subje t to				hange.
	Copyright
	This document contains		proprietary techn cal nformation of			Qu ct l Co., Ltd. Copying this
	document, distribution to others, and commun cation of the cont nts thereof, are forbidden
	without permission. Offenders are liable to the paym nt of				amag s. All rights are reserved in the
	event of a patent gra t or registration of a ut l ty mo el or					esign. All specifications supplied
	herein are subject to cha		ge without ot ce at any t me.

Copyright © Shanghai Quectel Wireless Solutions Ltd. 2012

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			Contents
Contents ............................................................................................................................................				3
Table Index .......................................................................................................................................				5
Figure Index ......................................................................................................................................				6
0. Revision history ............................................................................................................................				8
1. Introduction...................................................................................................................................				9
1.1. Related documents .............................................................................................................				9
1.2. Terms and abbreviations ..................................................................................................				10
1.3. Directives and standards ..................................................................................................				12
1.3.1. FCC Statement ......................................................................................................				12
1.3.2. FCC/IC Radiation exposure statement ..................................................................				12
1.3.3. Industry Canada licence ........................................................................................				12
1.4. Safety cautions .................................................................................................................				13
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2. Product concept...........................................................................................................................				15
2.1. Key features .....................................................................................................................				15
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2.2. Functional diagram ..........................................................................................................				17
2.3. Evaluation board ..............................................................................................................				18
3. Application interface...................................................................................................................				19
3.1. Pin ....................................................................................................................................				20
3.1.1. Pin assignm nt ......................................................................................................				20
3.1.2. Pin description.......................................................................................................				21
3.2. Operating modes ..............................................................................................................				26
3.3. Power supply....................................................................................................................				27
3.3.1. Feature of GSM power..........................................................................................				27
3.3.2. Minimize supply voltage			rop...............................................................................	27
3.3.3. Refere		ce p wer des gn	or the module................................................................	28
3.3.4. M nit		r p wer supply ...........................................................................................		29
3.4. P wer	n a d d wn sce arios ..........................................................................................			29
3.4.1. P	wer	...............................................................................................................		29
3.4.2. P wer d wn...........................................................................................................				31
3.4.3. Restart		...................................................................................................................		35
3.5. Power saving ....................................................................................................................				36
3.5.1. Minimum functionality mode................................................................................				36
3.5.2. Sleep mode ............................................................................................................				36
3.5.3. Wake up the module from SLEEP mode ..............................................................				37
3.6. Summary of state transitions ............................................................................................				37
3.7. RTC backup .....................................................................................................................				37
3.8. Serial interfaces................................................................................................................				39
3.8.1. UART Port ............................................................................................................				40
3.8.2. Debug Port ............................................................................................................				44
3.8.3. UART Application ................................................................................................				44
3.9. Audio interfaces ...............................................................................................................				48
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3.9.1. Decrease TDD noise and other noise ....................................................................	49
3.9.2. Microphone interfaces design ...............................................................................	50
3.9.3. Receiver interface design ......................................................................................	50
3.9.4. Earphone interface design .....................................................................................	51
3.9.5. Loud speaker interface design...............................................................................	51
3.9.6. Audio characteristics .............................................................................................	52
3.10. SIM card interface..........................................................................................................	52
3.10.1. SIM card application ...........................................................................................	52
3.10.2. 6 Pin SIM cassette ...............................................................................................	54
3.12. Behaviors of the RI ........................................................................................................	55
3.13. Network status indication...............................................................................................	57
3.14. Operating status indication.............................................................................................	57
4. Antenna interface ........................................................................................................................	59
4.1. RF reference design .........................................................................................................	59
4.2. RF output power...............................................................................................................	60
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4.3. RF receiving sensitivity....................................................................................................	60
4.4. Operating frequencies ......................................................................................................	60
4.5. RF cable soldering ...........................................................................................................	60
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5. Electrical, reliability and radio chara t risti s ............................................................................	62
5.1. Absolute maxim m ratings ..............................................................................................	62
5.2. Operating temperat re......................................................................................................	62
5.3. Power s pply ratings ........................................................................................................	62
5.4. Current cons mption........................................................................................................	63
5.5. Electro-static discharge ....................................................................................................	64
6. Mechanical dimensions...............................................................................................................	65
6.1. Mechanical dimensions of module...................................................................................	65
6.2. Footprint of recomme dation...........................................................................................	67
6.3. Top view of the module ...................................................................................................	68
6.4. B tt m view f the m dule..............................................................................................	69
7. Storage and Manufacturi g .........................................................................................................	70
7.1. St rage .............................................................................................................................	70
7.3. Packaging .........................................................................................................................	72
Appendix A: GPRS c ding schemes...............................................................................................	73
Appendix B: GPRS multi-slot classes.............................................................................................	74

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Table Index
TABLE 1: RELATED DOCUMENTS ....................................................................................................	9
TABLE 2: TERMS AND ABBREVIATIONS ......................................................................................	10
TABLE 3: MODULE KEY FEATURES...............................................................................................	15
TABLE 4: CODING SCHEMES AND MAXIMUM NET DATA RATES OVER AIR INTERFACE17
TABLE 5: M35 PIN ASSIGNMENT.....................................................................................................	20
TABLE 6: PIN DESCRIPTION.............................................................................................................	21
TABLE 7: OVERVIEW OF OPERATING MODES ............................................................................	26
TABLE 8: SUMMARY OF STATE TRANSITION .............................................................................	37
TABLE 9: LOGIC LEVELS OF THE UART INTERFACE.................................................................	40
TABLE 10: PIN DEFINITION OF THE UART INTERFACES ..........................................................	40
TABLE 11: PIN DEFINITION OF AUDIO INTERFACE ...................................................................	48
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TABLE 12: AOUT2 OUTPUT CHARACTERISTICS .........................................................................	49
TABLE 13: TYPICAL ELECTRET MICROPHONE CHARACTERISTICS ......................................	52
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TABLE 14: TYPICAL SPEAKER CHARACTERISTICS ...................................................................	52
TABLE 15: PIN DEFINITION OF THE SIM INTERFACE ................................................................	53
TABLE 16: PIN DESCRIPTION OF AMPHENOL SIM CARD HOLDER.........................................	54
TABLE 17: BEHAVIORS OF THE RI..................................................................................................	55
TABLE 18: WORKING STATE OF THE NETLIGHT ........................................................................	57
TABLE 19: PIN DEFINITION OF THE STATUS ...............................................................................	57
TABLE 20: PIN DEFINITION OF THE ANTENNA INTERFACE ....................................................	59
TABLE 21: THE MODULE CONDUCTED RF OUTPUT POWER ...................................................	60
TABLE 22: THE MODULE CONDUCTED RF RECEIVING SENSITIVITY ...................................	60
TABLE 23: THE MODULE OPERATING FREQUENCIES ...............................................................	60
TABLE 24: ABSOLUTE MAXIMUM RATINGS................................................................................	62
TABLE 25: OPERATING TEMPERATURE........................................................................................	62
TABLE 26: THE MODULE POWER SUPPLY RATINGS .................................................................	62
TABLE 27: THE MODULE CURRENT CONSUMPTION .................................................................	63
TABLE 28: THE ESD ENDURANCE (TEMPERATURE:25 ,HUMIDITY:45 %) ..........................	64
TABLE 29: DES RIPTION OF DIFFERENT CODING SCHEMES ..................................................	73
TABLE 30: GPRS MULTI-SLOT CLASSES .......................................................................................	74

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Figure Index

FIGURE 1: MODULE FUNCTIONAL DIAGRAM .............................................................................		18
FIGURE 2: PIN ASSIGNMENT ...........................................................................................................		20
FIGURE 3: RIPPLE IN SUPPLY VOLTAGE DURING TRANSMITTING BURST..........................		27
FIGURE 4: REFERENCE CIRCUIT OF THE VBAT INPUT..............................................................		28
FIGURE 5: REFERENCE CIRCUIT OF THE SOURCE POWER SUPPLY INPUT ..........................		28
FIGURE 6: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................		30
FIGURE 7: TURN ON THE MODULE USING KEYSTROKE...........................................................		30
FIGURE 8: TIMING OF TURNING ON SYSTEM..............................................................................		31
FIGURE 9: TIMING OF TURNING OFF THE MODULE ..................................................................		32
FIGURE 10: REFERENCE CIRCUIT FOR EMERG_OFF BY USING DRIVING CIRCUIT............		34
FIGURE 11: REFERENCE CIRCUIT FOR EMERG_OFF BY USING BUTTON .............................		34
FIGURE 12: TIMING OF RESTARTING SYSTEM............................................................................		35
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FIGURE 13: TIMING OF RESTARTING SYSTEM AFTER EMERGENCY SHUTDOWN.............		35
FIGURE 14: RTC SUPPLY FROM NON-CHARGEABLE BATTERY..............................................		38
FIGURE 15: RTC SUPPLY FROM RECHARGEABLE BATTERY...................................................		38
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FIGURE 16: RTC SUPPLY FROM CAPACITOR ...............................................................................		38
FIGURE 17: SEIKO XH414H-IV01E CHARGE CHARACTERISTICS.............................................		39
FIGURE 18: CONNECTION OF ALL FUNCTIONAL UART PORT.................................................		42
FIGURE 19: CONNECTION OF THREE LINES UART PORT..........................................................		42
FIGURE 20: CONNECTION OF UART PORT ASSOCIATED HARDWARE FLOW CONTROL ..		43
FIGURE 21: CONNECTION OF SOFTWARE UPGRADE ................................................................		43
FIGURE 22: CONNECTION OF SOFTWARE DEBUG......................................................................		44
FIGURE 23: 3.3V LEVEL MATCH CIRCUIT .....................................................................................		45
FIGURE 24: 5V LEVEL MATCH CIRCUIT ........................................................................................		46
FIGURE 25: RS232 LEVEL MATCH CIRCUIT ..................................................................................		47
FIGURE 26: MICROPHONE INTERFACE DESIGN OF AIN1&AIN2..............................................		50
FIGURE 27: RECEIVER INTERFACE DESIGN OF AOUT1.............................................................		50
FIGURE 28: EARPHONE INTERFACE DESIGN ...............................................................................		51
FIGURE 29: LOUD SPEAKER INTERFACE DESIGN ......................................................................		51
FIGURE 30: REFERENCE CIRCUIT OF THE 6 PINS SIM CARD ...................................................		53
FIGURE 31: AMPHENOL C707 10M006 512 2 SIM CARD HOLDER .............................................		54
FIGURE 32: RI BEHAVIOR OF VOICE CALLING AS A RECEIVER .............................................		55
FIGURE 33: RI BEHAVIOR OF DATA CALLING AS A RECEIVER ..............................................		56
FIGURE 34: RI BEHAVIOR AS A CALLER.......................................................................................		56
FIGURE 35: RI BEHAVIOR OF URC OR SMS RECEIVED..............................................................		56
FIGURE 36: REFERENCE CIRCUIT OF THE NETLIGHT ...............................................................		57
FIGURE 37: REFERENCE CIRCUIT OF THE STATUS ....................................................................		58
FIGURE 38: REFERENCE CIRCUIT OF RF .......................................................................................		59
FIGURE 39: RF SOLDERING SAMPLE .............................................................................................		61
FIGURE 40: M35 TOP AND SIDE DIMENSIONS UNIT: MM ...................................................		65
FIGURE 41: M35 BOTTOM DIMENSIONS UNIT: MM .............................................................		66
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FIGURE 42: FOOTPRINT ONE OF RECOMMENDATION UNIT: MM ....................................	67
FIGURE 43: TOP VIEW OF THE MODULE .......................................................................................	68
FIGURE 44: BOTTOM VIEW OF THE MODULE..............................................................................	69
FIGURE 45: PASTE APPLICATION ...................................................................................................	71
FIGURE 46: RAMP-SOAK-SPIKE REFLOW PROFILE ....................................................................	72
FIGURE 47: MODULE TRAY..............................................................................................................	72
FIGURE 48: RADIO BLOCK STRUCTURE OF CS-1, CS-2 AND CS-3 ...........................................	73
FIGURE 49: RADIO BLOCK STRUCTURE OF CS-4 ........................................................................	73

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0. Revision history

	Revision			Date			Author			Description of change
1.0			2011-12-29				Luka WU			Initial

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1. Introduction

This document defines Module M35 and describes its hardware interface which are connected with the customer application and the air interface.

This document can help customers quickly understand the interface specifications, electrical and mechanical details of M35. Associated with application notes and user guide, customers can use M35 to design and set up mobile applications easily.

1.1. Related documents

Table 1: Related documents

			Quectel
	SN		Document name	Remark
	[1]		M35 ATC	AT ommands s
		ConfidentialAlphabets and language-specific information
	[2]		ITU-T Draft new	S rial asyn hronous au omatic dialing and con rol
			recommendation V.25t r
	[3]		GSM 07.07	Digital	llular telecommu icatio s (Phase 2+); AT
				ommand set for GSM Mobile Equipme (ME)
	[4]		GSM 07.10	Support GSM 07.10 multipl xi g pro ocol
	[5]		GSM 07.05	Digital cellular t l commu icatio s (Phase 2+); Use of
				Data Term nal Equipm t – Data Circuit terminating
				Equ pment (DTE – DCE) int rface for Short Message
				Serv ce (SMS) and C ll Broadcast Service (CBS)
	[6]		GSM 11.14	D g tal cellular telecommunications (Phase 2+);
				Spec	cat on of the SIM Application Toolkit for the
				Subscriber Identity module – Mobile Equipment (SIM –
				ME) interface
	[7]		GSM 11.11	Digital cellular telecommunications (Phase 2+);
				Specification of the Subscriber Identity module – Mobile
				Equipment (SIM – ME) interface
	[8]		GSM 03.38	Digital cellular telecommunications (Phase 2+);
	[9]		GSM 11.10	Digital cellular telecommunications (Phase 2); Mobile
				Station (MS) conformance specification; Part 1:
				Conformance specification
	[10]		GSM_UART_AN	UART port application notes
	[11]		GSM_FW_Upgrade_Tool_	GSM Firmware upgrade tool lite GS2 user guide
			Lite_GS2_UDG
	[12]		M35_EVB_UGD	M35 EVB user guide
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1.2. Terms and abbreviations

Table 2: Terms and abbreviations

		Abbreviation			Description
	ADC				Analog-to-Digital Converter
	AMR				Adaptive Multi-Rate
	ARP				Antenna Reference Point
	ASIC				Application Specific Integrated Circuit
	BER				Bit Error Rate
	BOM				Bill Of Material
	BTS				Base Transceiver Station
				Quectel
	CHAP				Challenge Handshake Authentication Protocol
	CS				Coding Scheme
	CSD				Circuit Switched Data
	CTS				Clear To Send
	DAC				Digital-to-Analog Conv rt r
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	DRX				Discontinuous R c ption
	DSP				Digital Signal Proc ssor
	DCE				Data Comm nications Equipment (typi ally module)
	DTE				Data Terminal Eq ipm nt (typically comput r, xt r al co roller)
	DTR				Data Terminal Ready
	DTX				Discontin o s Transm ss on
	EFR				Enhanced Full Rate
	EGSM				E ha ced GSM
	EMC				Electromag etic Compat b l ty
	ESD				Electr static Discharge
	ETS				Eur pean Telecommu ication Standard
	F				Federal C mmu ications Commission (U.S.)
	FDMA				Frequency Division Multiple Access
	FR				Full Rate
	GMSK				Gaussian Minimum Shift Keying
	GPRS				General Packet Radio Service
	GSM				Global System for Mobile Communications
	HR				Half Rate
	I/O				Input/Output
	IC				Integrated Circuit
	IMEI				International Mobile Equipment Identity
	Imax				Maximum Load Current
	Inorm				Normal Current
	kbps				Kilo Bits Per Second
	LED				Light Emitting Diode
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	Li-Ion		Lithium-Ion
	Abbreviation		Description
	MO		Mobile Originated
	MS		Mobile Station (GSM engine)
	MT		Mobile Terminated
	PAP		Password Authentication Protocol
	PBCCH		Packet Switched Broadcast Control Channel
	PCB		Printed Circuit Board
	PDU		Protocol Data Unit
	PPP		Point-to-Point Protocol
	RF		Radio Frequency
	RMS		Root Mean Square (value)
	RTC		Real Time Clock
	RX		Receive Direction
		Quectel
	SIM		Subscriber Identification Module
	SMS		Short Message Servi e
	TDMA		Time Division Multiple A	ss
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	TE		Terminal Equipm nt
	TX		Transmitting Dir ction
	UART		Universal Asynchronous R	iver & Transmitter
	URC		Unsolicit d R s lt Code
	USSD		Unstr ct red S pplementary Service Data
	VSWR		Voltage Standing Wave Rat o
	Vmax		Maximum Voltage Value
	Vnorm		Normal Voltage Value
	Vmin		Mi imum Voltage Value
	VIHmax		Maximum I put H gh Level Voltage Value
	VIHmin		Mi imum I put High Level Voltage Value
	VILmax		Maximum I put Low Level Voltage Value
	VILmin		Mi imum I put Low Level Voltage Value
	VImax		Abs lute Maximum Input Voltage Value
	VImin		Absolute Minimum Input Voltage Value
	VOHmax		Maximum Output High Level Voltage Value
	VOHmin		Minimum Output High Level Voltage Value
	VOLmax		Maximum Output Low Level Voltage Value
	VOLmin		Minimum Output Low Level Voltage Value
	Phonebook abbreviations
	FD		SIM Fix Dialing phonebook
	LD		SIM Last Dialing phonebook (list of numbers most recently dialed)
	MC		Mobile Equipment list of unanswered MT Calls (missed calls)
	ON		SIM (or ME) Own Numbers (MSISDNs) list
	RC		Mobile Equipment list of Received Calls
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SM	SIM phonebook

1.3. Directives and standards

The M35 module is designed to comply with the FCC statements. FCC ID is XMR201202M35. The Host system using M35, should have label indicated FCC ID: XMR201202M35.

1.3.1. FCC Statement

1. This device complies with Part 15 of the FCC rules. Operation is subject to the following conditions:

a) This device may not cause harmful interference.

b) This device must accept any interference rec iv d, including int rference that may cause undesired operation.

2. Changes or modifications not expressly approved by he party r sponsib e for compli nce could void the user’s authority to op rate the equipm nt.

1.3.2. FCC/IC Radiation expos re stat m nt

This equipment complies with FCC/IC ra iation exposure limits s t forth for an uncontrolled

environment. This eq ipment sho ld be nstalled and op rat d with mi imum distance 20cm
between the radiator and your body as well as kept minimum 20cm from radio antenna depending
on the portable or Mobile status of th s mo ule usage.
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The manual f the h st system, which uses M35, must include RF exposure warning statement to
advice user sh uld keep mi imum 20cm rom the radio antenna of M35 module depending on
portable or M bile status.
1.3.3. Industry	anada licence
Under Industry	anada regulations, this radio transmitter may only operate using an antenna of a
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type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful.

The host system using M35 should have label indicating “transmitter module IC:

10224-201202M35.

This radio transmitter (identify the device by certification number, or module number if Category II) has been approved by Industry Canada to operate with the antenna type listed below with the

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maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.

The following list of antenna is indicating the maximum permissible antenna gain.

	Type			Maximum Gain			Impedance
External Antenna		Monopole		2dBi			50Ω
		Vehicular antenna		2dBi			50Ω
Internal Antenna		Monopole		2dBi			50Ω
		PIFA		2dBi			50Ω
		FPC		2dBi			50Ω
		PCB		2dBi			50Ω

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1.4. Safety cautions
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The following safety precautions must be obs rved during all phas s of		he oper		on, such	s
usage, service or repair of any c llular t rminal or mobile	i corpora i g		M35 modu e.
Manufacturers of the cell lar t rminal should s nd the followi g safety i		forma	on	o users	nd
operating personnel and to incorporate th se guid lin s into all ma	uals supplied w h			he product.
If not so, uectel does not take on any liability for custom r	failure	o comply		wi h these
precautions.

When in a hospital or other health care facility, obs rve the restrictions about the use of mobile. Switch the cellular terminal or mobile off. Medical equipment may be se sitive to ot operate normally for RF energy interference.

Switch ff the cellular terminal or mobile before boarding an aircraft. Make sure it switched ff. The operation of wireless appliances in an aircraft is forbidden to prevent interference with communication systems. Forget to think much of these instructions may lead to the flight safety or offend against local legal action, or both.

Do not operate the cellular terminal or mobile in the presence of flammable gas or fume. Switch off the cellular terminal when you are near petrol station, fuel depot, chemical plant or where blasting operations are in progress. Operation of any electrical equipment in potentially explosive atmosphere can constitute a safety hazard.

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Your cellular terminal or mobile receives and transmits radio frequency energy while switched on. RF interference can occur if it is used close to TV set, radio, computer or other electric equipment.

Road safety comes first! Do not use a hand-held cellular terminal or mobile while driving a vehicle, unless it is securely mounted in a holder for hands-free operation. Before making a call with a hand-held terminal or mobile, park the vehicle.

GSM cellular terminals or mobiles operate over radio frequency signal and

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cellular network and cannot be guarante d to conn ct in		a conditions, for
example no mobile fee or an invalid SIM card. Whi	you are in this condition
and need emergent help, Please Rem mb r using	m rg ncy call. In order to
make or receive call, the ellular erminal or mobile must be sw tched on nd in
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a service ar a with ad quate llular signal s r ngth.
Some networks do not allow for emergency call if certain		e work serv ces or
phone feat r s are in use (e.g. lo k fun tions, fixed diali g e c.). You m y h ve
to deactivate those f atur s b fore you can make an	m rge	cy call.

Also, some networks requ re that a valid SIM card be properly inserted in cellular terminal or mob le.

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2. Product concept

M35 is a Quad-band GSM/GPRS engine that works at frequencies of GSM850MHz, GSM900MHz, DCS1800MHz and PCS1900MHz. The M35 features GPRS multi-slot class 12 and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4. For more details about GPRS multi-slot classes and coding schemes, please refer to Appendix A and Appendix B.

With a tiny profile of 19.9mm × 23.6mm × 2.65mm, the module can meet the requirements of almost all M2M applications, including Tracking and Tracing, Industrial PDA, Wireless POS, Intelligent Measurement, Remote Controlling, etc.

	M35 is an SMD type module with LCC package, which can be embedded in customer applications.
	It provides abundant hardware interfaces between the module and custom r’s host board.
		Quectel
	Designed with power saving technique, the urrent onsump ion of M35 modu e is as low as 0.9
	mA in SLEEP mode when DRX is 5.
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	M35 is integrated with Int rn t					s rvi proto ols, whi h	are TCP/IP,	UDP, FTP nd PPP.
	Extended AT commands have b					n d v lop d for ustomer to use these I		er et serv ce protocols
	easily.
	The module fully complies to FCC statements and RoHS ir ctive of the European Union.
	2.1. Key features
	Table 3: Module key features
		Feature			Impleme tation
	Power supply				Si gle supply voltage 3.3V ~ 4.6V
					Typical supply voltage 4V
	Power saving				Typical power consumption in SLEEP mode:			0.9 mA@ DRX=5
								0.7 mA@ DRX=9
	Frequency bands					Quad-band: GSM850, GSM900, DCS1800, PCS1900.
						The module can search these frequency bands automatically
						The frequency bands can be set by AT command.
						Compliant with GSM Phase 2/2+
	GSM class				Small MS
	Transmitting power					Class 4 (2W) at GSM850 and GSM900
						Class 1 (1W) at DCS1800 and PCS1900
	GPRS connectivity					GPRS multi-slot class 12	(default)
						GPRS multi-slot class 1~12 (configurable)
						GPRS mobile station class B
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Temperature range	 Normal operation: -35°C ~ +80°C
	 Restricted operation: -40°C ~ -35°C and +80°C ~ +85°C 1)
	 Storage temperature: -45°C ~ +90°C
DATA GPRS:	 GPRS data downlink transfer: max. 85.6 kbps
	 GPRS data uplink transfer: max. 85.6 kbps
	 Coding schemes: CS-1, CS-2, CS-3 and CS-4
	 Support the protocols PAP (Password Authentication Protocol)
		usually used for PPP connections
	 Internet service protocols TCP/UDP/FTP/HTTP
	 Support Packet Switched Broadcast Control Channel (PBCCH)
CSD:	 CSD transmission rates: 2.4, 4.8, 9.6, 14.4 kbps non-transparent
	 Support Unstructured Supplementary Services Data (USSD)
SMS	 Text and PDU mode
	 SMS storage: SIM card
FAX	Group 3 Class 1 and Class 2
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SIM interface	Support SIM ard: 1.8V, 3V
Audio features	Speech codec modes:
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		Half Rate (ETS 06.20)
	 Full Rate (ETS 06.10)
		Enhan d Full Rate (ETS 06.50 / 06.60 / 06.80)
	 Adaptive Multi-Rate (AMR)
		Echo Canc llation
		Echo Suppression
		No se Re uct on
		Embed ed one amplifi r of class AB with maximum driving
		power up to 800mW
UART interface	UART Port:
		Seven l es on UART port interface
		Use or AT command, GPRS data and CSD data
		Multiplexing function
	 Support autobauding from 4800 bps to 115200 bps
	Debug Port:
		Two lines on debug UART port interface DBG TXD and
		DBG RXD
	 Debug Port only used for software debugging
Phonebook management	Support phonebook types: SM, ME, FD, ON, MT
SIM Application Toolkit	Support SAT class 3, GSM 11.14 Release 99
Real time clock	Implemented
Physical characteristics	Size:
	19.9±0.15 ×23.6±0.15 ×2.65±0.2mm
	Weight: 3g
Firmware upgrade	Firmware upgrade via UART Port
Antenna interface	Connected via 50 Ohm antenna pad
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M35 Hardware Design

Table 4: Coding schemes and maximum net data rates over air interface

	Coding scheme			1 Timeslot			2 Timeslot			4 Timeslot
CS-1:				9.05kbps			18.1kbps			36.2kbps
CS-2:				13.4kbps			26.8kbps			53.6kbps
CS-3:				15.6kbps			31.2kbps			62.4kbps
CS-4:				21.4kbps			42.8kbps			85.6kbps

2.2. Functional diagram

The following figure shows a block diagram of the M35 module and illustrates the major functional parts:

 Power management

Quectel Baseband

 The GSM radio frequency part

 The Peripheral interface

Confidential—SIM interface

—Audio interface

—UART interface

—Power s pply

—RF interface

—Turn on/off interface

—RTC interface

M35_HD_V1.0

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M35 Hardware Design

Power

UART

Application

Interface

supply

SIM

26M

MT6252D

VDD_EXT

PWRKEY

SMD-(42

Contro

PA

EMERG_OFF

l

VRTC

TQM6M4068

AUDIO

Pads)

32.768K

Quectel

RF ANTENNA

Confidential

Figure 1: Module fun ional diagram

2.3. Evaluation board

In order to help c stomer to develop appl cat ons w th M35, Qu ct l supplies an evaluation board (EVB), RS-232 to USB cable, power adapter, earphon , ant nna and oth r peripherals to control or test the module. For details, please re er to the ocum nt [12].

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M35 Hardware Design

3. Application interface

The module is equipped with 42 pin SMT pad and it adopts LCC package. Detailed descriptions on Sub-interfaces included in these pads are given in the following chapters:

Power supply

Turn on/off

Power saving

RTC

UART interfaces

Audio interfaces

SIM interface

ConfidentialQuectel

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M35 Hardware Design

3.1. Pin

3.1.1. Pin assignment

Quectel

Confidential

Figure 2: Pin assignment

Table 5: M35 pin assignment

PIN NO.

PIN NAME

I/O

PIN NO.

PIN NAME

I/O

1

AGND

2

MIC2P

I

3

MIC2N

I

4

MIC1P

I

5

MIC1N

I

6

SPK1N

O

7

SPK1P

O

8

LOUDSPKN

O

9

LOUDSPKP

O

10

PWRKEY

I

11

EMERG_OFF

I

12

STATUS

O

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M35 Hardware Design

13

NETLIGHT

O

14

DBG_RXD

I

15

DBG_TXD

O

16

RESERVED

17

RESERVED

18

RESERVED

19

VDD_EXT

O

20

DTR

I

21

RXD

I

22

TXD

O

23

CTS

O

24

RTS

I

25

DCD

O

26

RI

O

27

SIM_VDD

O

28

SIM_RST

O

29

SIM_DATA

I/O

30

SIM_CLK

O

31

SIM_GND

32

VRTC

I/O

33

VBAT

I

34

VBAT

I

35

GND

36

GND

37

GND

38

GND

Quectel

39

RF ANT

I/O

40

GND

41

RESERVED

42

RESERVED

Confidential

3.1.2. Pin description

Table 6: Pin description

Power supply

PIN NAME

PIN

I/

DESCRIPTION

DC

COMMENT

NO.

O

CHARACTERISTICS

VBAT

33,

I

Main power supply of

Vmax= 4.6V

Make sure that supply

34

module:

Vmin=3.3V

sufficient current in a

VBAT=3.3V~4.6V

Vnorm=4.0V

transmitting burst

which typically rises

to 1.6A.

VRTC

32

I/

P wer supply for RTC

VImax=VBAT

If unused, keep this

O

when VBAT is not

VImin=2.6V

pin open.

supplied for the

VInorm=2.8V

system.

VOmax=2.85V

Charging for backup

VOmin=2.6V

battery or golden

VOnorm=2.8V

capacitor when the

Iout(max)= 730uA

VBAT is supplied.

Iin=2.6~5 uA

VDD_EXT

19

O

Supply 2.8V voltage

Vmax=2.9V

1. If unused, keep this

for external circuit.

Vmin=2.7V

pin open.

Vnorm=2.8V

2. Recommended to

Imax=20mA

add a 2.2~4.7uF

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M35 Hardware Design

					bypass capacitor,
					when using this pin
					for power supply.
GND	35,		Ground
	36,
	37,
	38,
	40
Turn on/off
PIN NAME	PIN	I/	DESCRIPTION	DC	COMMENT
	NO.	O		CHARACTERISTICS
PWRKEY	10	I	Power on/off key.	VILmax=	Pulled up to VBAT
			PWRKEY should be	0.1*VBAT	internally.
			pulled down for a	VIHmin=
	Quectel
			moment to turn on or	0.6*VBAT
			turn off the system.	VImax=VBAT
Emergency shutdown
		Confidential
PIN NAME	PIN	I/	DESCRIPTION	DC	COMMENT
	NO.	O		CHARACTERISTICS
EMERG	11	I	Em rg n y off. Pulled	VILmax=0.4V	Open dr n/collector
OFF			down for at l ast	VIHmin=2.2V	dr ver requ red in
			20ms, which will turn	Vop nmax=2.8V	cellular device
			off the module n case		application.
			of emergency. Use t		If unused, keep this
			only when normal		pin open.
			shutdown through
			PWRKEY or AT
			c mma d cannot
			perform well.
Module indicat r
PIN NAME	PIN	I/	DESCRIPTION	DC	COMMENT
	NO.	O		CHARACTERISTICS
STATUS	12	O	Indicate module	VOHmin=	If unused, keep this
			operating status. High	0.85*VDD EXT	pin open.
			level indicates module	VOLmax=
			is power-on and low	0.15*VDD_EXT
			level indicates
			power-down.
Audio interface
PIN NAME	PIN	I/	DESCRIPTION	DC	COMMENT
	NO.	O		CHARACTERISTICS
MIC1P	4	I	Channel one of		If unused, keep these
MIC1N	5		positive and negative		pins open.
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M35 Hardware Design

			voice-band input
MIC2P	2	I	Channel two of
MIC2N	3		positive and negative
			voice-band input
SPK1N	6,	O	Channel one of			If unused, keep these
SPK1P	7		positive and negative			pins open.
			voice-band output
AGND	1		Cooperate with			If unused, keep this
			LOUDSPKP			pin open.
LOUDSPKN	8 9	O	Channel two of			1. If unused, keep
			positive and negative			these pins open.
LOUDSPKP			voice-band output			2. Embedded
						amplifier of class AB
						internally.
	Quectel					3. Support both Voice
						and ring.
Net status indicator
		Confidential
PIN NAME	PIN	I/	DESCRIPTION	DC		COMMENT
	NO.	O		CHARACTERISTICS
NETLIGHT	13	O	N twork status	VOHmi =		If unused, keep this
			indication	0.85*VDD EXT		p open.
				VOLmax=
				0.15*VDD EXT
Main UART port
PIN NAME	PIN	I/	DESCRIPTION	DC		COMMENT
	NO.	O		CHARACTERISTICS
DTR	20	I	Data term al rea y	VILmin=-0.3V		If only use TXD,
RXD	21	I	Receivi g data	VILmax=		RXD and GND to
				0.25*VDD EXT		communicate,
TXD	22	O	Tra smitti g data
				VIHmin=		recommended keeping
TS	23	O	Clear to se d
				0.75*VDD EXT		other pins open,
RTS	24	I	Request to send
				VIHmax=		except RTS. Pull
D D	25	O	Data carrier detection
				VDD EXT+0.3V		down RTS.
RI	26	O	Ring indicator
				VOHmin=
				0.85*VDD EXT
				VOLmax=
				0.15*VDD_EXT
Debug UART port
PIN NAME	PIN	I/	DESCRIPTION	DC		COMMENT
	NO.	O		CHARACTERISTICS

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