Quectel Wireless Solutions 201202M95 Users Manual

M95

Quectel Cellular Engine

Hardware Design

M95_HD_V1.0

M95 Hardware Design

		Document Title		M95 Hardware Design
		Revision		1.0
		Date		2012-02-06
		Status		Released
		Document Control ID		M95_HD_V1.0

General Notes

Quectel offers this information as a service to its customers, to support application and engineering efforts that use the products designed by Quectel. The information provided is based upon requirements specifically provided for customers of Quectel. Quectel has not undertaken any independent search for additional information, relevant to any information that may be in the customer’s possession. Furthermore, system validation of this product designed by Quectel within a larger electronic system remains the responsibility of the customer or the customer’s system integrator. All specifications supplied herein are subject to change.

Copyright

This document contains proprietary technical information of Quectel Co., Ltd. Copying this document, distribution to others, and communication of the contents thereof, are forbidden without permission. Offenders are liable to the payment of damages. All rights are reserved in the event of a patent grant or registration of a utility model or design. All specifications supplied herein are subject to change without notice at any time.

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 Radiation exposure statement .......................................................................	12
1.3.3. Industry Canada licence ........................................................................................	12
1.4. Safety cautions .................................................................................................................	13
2. Product concept...........................................................................................................................	15
2.1. Key features .....................................................................................................................	15
2.2. Functional diagram ..........................................................................................................	17
2.3. Evaluation board ..............................................................................................................	18
3. Application interface...................................................................................................................	19
3.1. Pin ....................................................................................................................................	20
3.1.1. Pin assignment ......................................................................................................	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 drop...............................................................................	27
3.3.3. Reference power design for the module................................................................	28
3.3.4. Monitor power supply ...........................................................................................	29
3.4. Power on and down scenarios ..........................................................................................	29
3.4.1. Power on ...............................................................................................................	29
3.4.2. Power down...........................................................................................................	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
4.3. RF receiving sensitivity....................................................................................................	60
4.4. Operating frequencies ......................................................................................................	60
4.5. RF cable soldering ...........................................................................................................	60
5. Electrical, reliability and radio characteristics ............................................................................	62
5.1. Absolute maximum ratings ..............................................................................................	62
5.2. Operating temperature......................................................................................................	62
5.3. Power supply ratings ........................................................................................................	62
5.4. Current consumption........................................................................................................	63
5.5. Electro-static discharge ....................................................................................................	64
6. Mechanical dimensions...............................................................................................................	65
6.1. Mechanical dimensions of module...................................................................................	65
6.2. Footprint of recommendation...........................................................................................	67
6.3. Top view of the module ...................................................................................................	68
6.4. Bottom view of the module..............................................................................................	69
7. Storage and Manufacturing .........................................................................................................	70
7.1. Storage .............................................................................................................................	70
7.3. Packaging .........................................................................................................................	72
Appendix A: GPRS coding 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: M95 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
TABLE 12: AOUT2 OUTPUT CHARACTERISTICS .........................................................................	49
TABLE 13: TYPICAL ELECTRET MICROPHONE CHARACTERISTICS ......................................	52
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: DESCRIPTION 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
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
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: M95 TOP AND SIDE DIMENSIONS UNIT: MM ...................................................	65
FIGURE 41: M95 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 M95 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 M95. Associated with application notes and user guide, customers can use M95 to design and set up mobile applications easily.

1.1. Related documents

Table 1: Related documents

	SN			Document name			Remark
[1]				M95_ATC			AT commands set
[2]				ITU-T Draft new			Serial asynchronous automatic dialing and control
				recommendation V.25ter
[3]				GSM 07.07			Digital cellular telecommunications (Phase 2+); AT
							command set for GSM Mobile Equipment (ME)
[4]				GSM 07.10			Support GSM 07.10 multiplexing protocol
[5]				GSM 07.05			Digital cellular telecommunications (Phase 2+); Use of
							Data Terminal Equipment – Data Circuit terminating
							Equipment (DTE – DCE) interface for Short Message
							Service (SMS) and Cell Broadcast Service (CBS)
[6]				GSM 11.14			Digital cellular telecommunications (Phase 2+);
							Specification 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+);
							Alphabets and language-specific information
[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]				M95_EVB_UGD			M95 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
CHAP				Challenge Handshake Authentication Protocol
CS				Coding Scheme
CSD				Circuit Switched Data
CTS				Clear To Send
DAC				Digital-to-Analog Converter
DRX				Discontinuous Reception
DSP				Digital Signal Processor
DCE				Data Communications Equipment (typically module)
DTE				Data Terminal Equipment (typically computer, external controller)
DTR				Data Terminal Ready
DTX				Discontinuous Transmission
EFR				Enhanced Full Rate
EGSM				Enhanced GSM
EMC				Electromagnetic Compatibility
ESD				Electrostatic Discharge
ETS				European Telecommunication Standard
FCC				Federal Communications 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
SIM		Subscriber Identification Module
SMS		Short Message Service
TDMA		Time Division Multiple Access
TE		Terminal Equipment
TX		Transmitting Direction
UART		Universal Asynchronous Receiver & Transmitter
URC		Unsolicited Result Code
USSD		Unstructured Supplementary Service Data
VSWR		Voltage Standing Wave Ratio
Vmax		Maximum Voltage Value
Vnorm		Normal Voltage Value
Vmin		Minimum Voltage Value
VIHmax		Maximum Input High Level Voltage Value
VIHmin		Minimum Input High Level Voltage Value
VILmax		Maximum Input Low Level Voltage Value
VILmin		Minimum Input Low Level Voltage Value
VImax		Absolute 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 M95 module is designed to comply with the FCC statements. FCC ID is XMR201202M95. The Host system using M95, should have label indicated FCC ID: XMR201202M95.

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 received, including interference that may cause undesired operation.

2.Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

1.3.2. FCC Radiation exposure statement

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum 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 this module usage.

The manual of the host system, which uses M95, must include RF exposure warning statement to advice user should keep minimum 20cm from the radio antenna of M95 module depending on portable or Mobile status.

Note: If a portable device (such as PDA) uses M95 module, the device needs to do permissive change and SAR testing.

1.3.3. Industry Canada licence

English version

This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions:

a)This device may not cause harmful interference.

b)This device must accept any interference, including interference that may cause undesired operation of the device.

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The Host system using M95, should have label indicating “transmitter module

IC:10064-201202M95.

French version

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes :

a)l'appareil ne doit pas produire de brouillage, et

b)L’utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

1.4. Safety cautions

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 M95 module. Manufacturers of the cellular terminal should send the following safety information to users and operating personnel and to incorporate these guidelines into all manuals supplied with the product. If not so, Quectel does not take on any liability for customer failure to comply with these precautions.

When in a hospital or other health care facility, observe the restrictions about the use of mobile. Switch the cellular terminal or mobile off. Medical equipment may be sensitive to not operate normally for RF energy interference.

Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it switched off. 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.

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.

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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 cellular network and cannot be guaranteed to connect in all conditions, for example no mobile fee or an invalid SIM card. While you are in this condition and need emergent help, Please Remember using emergency call. In order to make or receive call, the cellular terminal or mobile must be switched on and in a service area with adequate cellular signal strength.

Some networks do not allow for emergency call if certain network services or phone features are in use (e.g. lock functions, fixed dialing etc.). You may have to deactivate those features before you can make an emergency call.

Also, some networks require that a valid SIM card be properly inserted in cellular terminal or mobile.

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2. Product concept

M95 is a Quad-band GSM/GPRS engine that works at frequencies of GSM850MHz, GSM900MHz, DCS1800MHz and PCS1900MHz. The M95 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.

M95 is an SMD type module with LCC package, which can be embedded in customer applications. It provides abundant hardware interfaces between the module and customer’s host board.

Designed with power saving technique, the current consumption of M95 module is as low as 0.9 mA in SLEEP mode when DRX is 5.

M95 is integrated with Internet service protocols, which are TCP/IP, UDP, FTP and PPP. Extended AT commands have been developed for customer to use these Internet service protocols easily.

The module fully complies to FCC statements and RoHS directive of the European Union.

2.1. Key features

Table 3: Module key features

	Feature			Implementation
Power supply				Single 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
SIM interface	Support SIM card: 1.8V, 3V
Audio features	Speech codec modes:
	 Half Rate (ETS 06.20)
	 Full Rate (ETS 06.10)
	 Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80)
	 Adaptive Multi-Rate (AMR)
		Echo Cancellation
		Echo Suppression
		Noise Reduction
	 Embedded one amplifier of class AB with maximum driving
		power up to 800mW
UART interface	UART Port:
	 Seven lines on UART port interface
	 Use for 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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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 M95 module and illustrates the major functional parts:

Power management

Baseband

The GSM radio frequency part

The Peripheral interface

—SIM interface

—Audio interface

—UART interface

—Power supply

—RF interface

—Turn on/off interface

—RTC interface

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	Power		UART	Application
				Interface
26M	supply		SIM
			MT6252D
			VDD_EXT
			PWRKEY
				SMD-(42
PA		Contro	EMERG_OFF
		l
TQM6M4068			VRTC
			AUDIO
				Pads)
	32.768K
			RF_ANTENNA

Figure 1: Module functional diagram

2.3. Evaluation board

In order to help customer to develop applications with M95, Quectel supplies an evaluation board (EVB), RS-232 to USB cable, power adapter, earphone, antenna and other peripherals to control or test the module. For details, please refer to the document [12].

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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

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3.1. Pin

3.1.1. Pin assignment

Figure 2: Pin assignment

Table 5: M95 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

M95_HD_V1.0

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M95 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

39

RF_ANT

I/O

40

GND

41

RESERVED

42

RESERVED

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/

Power 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

M95_HD_V1.0

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M95 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=
			moment to turn on or	0.6*VBAT
			turn off the system.	VImax=VBAT
Emergency shutdown
PIN NAME	PIN	I/	DESCRIPTION	DC	COMMENT
	NO.	O		CHARACTERISTICS
EMERG_	11	I	Emergency off. Pulled	VILmax=0.4V	Open drain/collector
OFF			down for at least	VIHmin=2.2V	driver required in
			20ms, which will turn	Vopenmax=2.8V	cellular device
			off the module in case		application.
			of emergency. Use it		If unused, keep this
			only when normal		pin open.
			shutdown through
			PWRKEY or AT
			command cannot
			perform well.
Module indicator
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.
M95_HD_V1.0					- 22 -

M95 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.
					3. Support both Voice
					and ring.
Net status indicator
PIN NAME	PIN	I/	DESCRIPTION	DC	COMMENT
	NO.	O		CHARACTERISTICS
NETLIGHT	13	O	Network status	VOHmin=	If unused, keep this
			indication	0.85*VDD_EXT	pin open.
				VOLmax=
				0.15*VDD_EXT
Main UART port
PIN NAME	PIN	I/	DESCRIPTION	DC	COMMENT
	NO.	O		CHARACTERISTICS
DTR	20	I	Data terminal ready	VILmin=-0.3V	If only use TXD,
				VILmax=	RXD and GND to
RXD	21	I	Receiving data
				0.25*VDD_EXT	communicate,
TXD	22	O	Transmitting data
				VIHmin=	recommended keeping
CTS	23	O	Clear to send
				0.75*VDD_EXT	other pins open,
RTS	24	I	Request to send
				VIHmax=	except RTS. Pull
DCD	25	O	Data carrier detection
RI	26	O	Ring indicator	VDD_EXT+0.3V	down RTS.
				VOHmin=
				0.85*VDD_EXT
				VOLmax=
				0.15*VDD_EXT
Debug UART port
PIN NAME	PIN	I/	DESCRIPTION	DC	COMMENT
	NO.	O		CHARACTERISTICS

M95_HD_V1.0

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