Quectel Wireless Solutions 201609MC60 User Manual

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MC60 Hardware Design

GSM/GPRS/GNSS Module Series

Rev. MC60_Hardware_Design_V1.0

Date: 2016-06-28

www.quectel.com

GSM/GPRS/GNSS Module Series

MC60 Hardware 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: +86 21 5108 6236

Email: info@quectel.com

Or our local office. For more information, please visit:

http://www.quectel.com/support/salesupport.aspx

For technical support, or to report documentation errors, please visit: http://www.quectel.com/support/techsupport.aspx

Or email to: Support@quectel.com

GENERAL NOTES

QUECTEL OFFERS THE INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION. ALL INFORMATION SUPPLIED HEREIN IS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE.

COPYRIGHT

THE INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF QUECTEL CO., LTD. TRANSMITTING, REPRODUCTION, DISSEMINATION AND EDITING OF THIS DOCUMENT AS WELL AS UTILIZATION OF THE CONTENT ARE FORBIDDEN WITHOUT PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL OR DESIGN.

Copyright © Quectel Wireless Solutions Co., Ltd. 2016. All rights reserved.

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About the Document

History

Revision

Date

Author

Description

 

 

 

 

1.0

2016-06-28

Tiger CHENG

Initial

 

 

 

 

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Contents

About the Document ................................................................................................................................

 

 

2

Contents....................................................................................................................................................

 

 

 

3

Table Index ...............................................................................................................................................

 

 

 

6

Figure Index..............................................................................................................................................

 

 

 

8

1

Introduction

.....................................................................................................................................

 

 

10

 

1.1.

Safety Information.................................................................................................................

 

10

2

Product Concept .............................................................................................................................

 

 

12

 

2.1.

General Description ..............................................................................................................

 

12

 

2.2.

Directives and Standards ......................................................................................................

 

13

 

 

2.2.1.

2.2.1. FCC Statement ..................................................................................................

 

13

 

 

2.2.2. FCC Radiation Exposure Statement ............................................................................

13

 

2.3.

Key Features.........................................................................................................................

 

 

13

 

2.4.

Functional Diagram...............................................................................................................

 

17

 

2.5.

Evaluation Board...................................................................................................................

 

18

3

Application Functions.....................................................................................................................

 

19

 

3.1.

Pin of Module ........................................................................................................................

 

20

 

 

3.1.1.

Pin Assignment ............................................................................................................

 

20

 

 

3.1.2.

Pin Description.............................................................................................................

 

21

 

3.2.

Application Modes Introduction .............................................................................................

 

25

 

3.3.

Power Supply........................................................................................................................

 

27

 

 

3.3.1.

Power Features ...........................................................................................................

 

27

 

 

3.3.2. Decrease Supply Voltage Drop

....................................................................................

28

 

 

3.3.2.1.

Decrease Supply Voltage Drop for GSM Part..................................................

28

 

 

3.3.2.2.

Decrease Supply Voltage Drop for GNSS Part................................................

29

 

 

3.3.3. Reference Design for Power Supply............................................................................

29

 

 

3.3.3.1.

Reference Design for Power Supply of GSM Part...........................................

29

 

 

3.3.3.2.

Reference Design for Power Supply of GNSS Part in All-in-one Solution

....... 30

 

 

3.3.3.3.

Reference Design for Power Supply of GNSS Part in Stand-alone Solution ... 31

 

 

3.3.4.

Monitor Power Supply..................................................................................................

 

32

 

 

3.3.5. Backup Domain of GNSS ............................................................................................

 

32

 

 

3.3.5.1.

Use VBAT as the Backup Power Source of GNSS..........................................

32

 

 

3.3.5.2.

Use VRTC as Backup Power of GNSS ...........................................................

32

 

3.4.

Operating Modes ..................................................................................................................

 

34

 

 

3.4.1. Operating Modes of GSM Part.....................................................................................

 

34

 

 

3.4.1.1.

Minimum Functionality Mode...........................................................................

35

 

 

3.4.1.2.

SLEEP Mode...................................................................................................

 

35

 

 

3.4.1.3.

Wake up GSM Part from SLEEP Mode ...........................................................

36

 

 

3.4.2. Operating Modes of GNSS Part...................................................................................

36

 

 

 

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3.4.2.1.

Full on Mode ....................................................................................................

 

36

 

3.4.2.2.

Standby Mode .................................................................................................

 

37

 

3.4.2.3.

Backup Mode ..................................................................................................

 

38

3.4.3. Summary of GSM and GNSS Parts’ State in All-in-one Solution..................................

38

3.4.4. Summary of GSM and GNSS Parts’ State in Stand-alone Solution .............................

39

3.5. Power on and down Scenarios in All-in-one Solution............................................................

39

3.5.1.

Power on .....................................................................................................................

 

39

3.5.2.

Power down .................................................................................................................

 

41

 

3.5.2.1.

Power down Module Using the PWRKEY Pin .................................................

41

 

3.5.2.2.

Power down Module Using AT Command .......................................................

43

 

3.5.2.3.

Power down GNSS Part Alone Using AT Command .......................................

43

 

3.5.2.4.

Under - voltage Automatic Shutdown ................................................................

44

3.5.3.

.........................................................................................................................

 

44

3.6. Power on and down Scenarios in Stand-alone Solution........................................................

44

3.6.1. Power on GSM Part.....................................................................................................

 

44

3.6.2. Power down ................................................................................................GSM Part

 

46

 

3.6.2.1. .............................................

Power down GSM Part Using the PWRKEY Pin

46

 

3.6.2.2. .........................................................

Power down GSM Part using Command

47

3.7.

Serial Interfaces ....................................................................................................................

 

47

3.7.1.

UART Port ...................................................................................................................

 

50

 

3.7.1.1. ....................................................................................

Features of UART Port

 

50

 

3.7.1.2. ................................................................................

The Connection of UART

51

 

3.7.1.3. ...........................................................................................

Firmware Upgrade

 

52

3.7.2.

Debug ................................................................................................................... Port

 

53

3.7.3. Auxiliary .................................................................UART Port and GNSS UART Port

54

 

3.7.3.1. .....................................................................

Connection in All - in - one Solution

54

 

3.7.3.2. ................................................................

Connection in Stand - alone Solution

54

3.7.4.

UART Application .........................................................................................................

 

55

3.8.

Audio Interfaces ....................................................................................................................

 

56

3.8.1. Decrease ........................................................................TDD Noise and Other Noise

58

3.8.2.

Microphone ..................................................................................... Interfaces Design

 

58

3.8.3. Receiver ......................................................................and Speaker Interface Design

59

3.8.4.

Earphone .......................................................................................... Interface Design

 

60

3.8.5. Loud Speaker ....................................................................................Interface Design

60

3.8.6.

Audio Characteristics ...................................................................................................

 

61

3.9.

SIM Card Interface............................................................................................................ ....

 

61

3.10.

ADC

 

 

65

3.11.

Behaviors of ...............................................................................................................the RI

 

65

3.12.

Network Status ......................................................................................................Indication

 

67

3.13. EASY .................................................................................Autonomous AGPS Technology

68

3.14.

EPO .............................................................................................Offline AGPS Technology

 

68

3.15.

Multi .......................................................................................................................-tone AIC

 

69

4 Antenna Interface............................................................................................................................

 

 

70

4.1.

GSM .........................................................................................................Antenna Interface

 

70

 

 

 

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4.1.1.

Reference Design ........................................................................................................

70

 

 

4.1.2.

RF Output Power .........................................................................................................

71

 

 

4.1.3.

RF Receiving Sensitivity ..............................................................................................

72

 

 

4.1.4.

Operating Frequencies ................................................................................................

72

 

 

4.1.5.

RF Cable Soldering .....................................................................................................

72

 

4.2.

 

GNSS Antenna Interface.......................................................................................................

73

 

 

4.2.1.

Antenna Specifications ................................................................................................

73

 

 

4.2.2.

Active Antenna.............................................................................................................

74

 

 

4.2.3.

Passive Antenna ..........................................................................................................

75

 

4.3.

 

Bluetooth Antenna Interface..................................................................................................

75

5

Electrical, Reliability and Radio Characteristics ..........................................................................

78

 

5.1.

 

Absolute Maximum Ratings ..................................................................................................

78

 

5.2.

 

Operating Temperature .........................................................................................................

78

 

5.3.

 

Power Supply Ratings...........................................................................................................

79

 

5.4.

 

Current Consumption............................................................................................................

81

 

5.5.

 

Electrostatic Discharge .........................................................................................................

83

6

Mechanical Dimensions..........................................................................................................

........ 85

 

6.1. Mechanical Dimensions of Module .......................................................................................

85

 

6.2.

 

Recommended Footprint.......................................................................................................

87

 

6.3. Top and Bottom View of the Module......................................................................................

88

7

Storage and Manufacturing............................................................................................................

89

 

7.1.

 

Storage..................................................................................................................................

89

 

7.2.

 

Soldering...............................................................................................................................

89

 

7.3.

 

Packaging .............................................................................................................................

90

 

 

7.3.1. Tape and Reel Packaging............................................................................................

91

8

Appendix A References..................................................................................................................

92

9

Appendix B GPRS Coding Schemes .............................................................................................

97

10

Appendix C GPRS Multi-slot Classes............................................................................................

99

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Table Index

 

TABLE 1: KEY FEATURES (GMS/GPRS PART OF MC60) ....................................................................

13

TABLE 2: CODING SCHEMES AND MAXIMUM NET DATA RATES OVER AIR INTERFACE ...............

15

TABLE 3: KEY FEATURES (GNSS PART OF MC60) .............................................................................

15

TABLE 4: PROTOCOLS SUPPORTED BY THE MODULE.....................................................................

17

TABLE 5: I/O PARAMETERS DEFINITION.............................................................................................

21

TABLE 6: PIN DESCRIPTION.................................................................................................................

21

TABLE 7: MULTIPLEXED FUNCTIONS..................................................................................................

25

TABLE 8: COMPARISON BETWEEN ALL-IN-ONE AND STAND-ALONE SOLUTION...........................

27

TABLE 9: OPERATING MODES OVERVIEW OF GSM PART................................................................

34

TABLE 10: DEFAULT CONFIGURATION OF FULL ON MODE (GNSS PART) ......................................

36

TABLE 11: COMBINATION STATES OF GSM AND GNSS PARTS IN ALL-IN-ONE SOLUTION ...........

38

TABLE 12: COMBINATION STATES OF GSM AND GNSS PARTS IN STAND-ALONE SOLUTION......

39

TABLE 13: LOGIC LEVELS OF THE UART INTERFACE.......................................................................

49

TABLE 14: PIN DEFINITION OF THE UART INTERFACES ...................................................................

49

TABLE 15: PIN DEFINITION OF AUDIO INTERFACE............................................................................

56

TABLE 16: AOUT2 OUTPUT CHARACTERISTICS ................................................................................

57

TABLE 17: TYPICAL ELECTRET MICROPHONE CHARACTERISTICS................................................

61

TABLE 18: TYPICAL SPEAKER CHARACTERISTICS...........................................................................

61

TABLE 19: PIN DEFINITION OF THE SIM INTERFACE.........................................................................

62

TABLE 20: PIN DEFINITION OF THE ADC.............................................................................................

65

TABLE 21: CHARACTERISTICS OF THE ADC ......................................................................................

65

TABLE 22: BEHAVIORS OF THE RI .......................................................................................................

65

TABLE 23: WORKING STATE OF THE NETLIGHT ................................................................................

67

TABLE 24: PIN DEFINITION OF THE RF_ANT ......................................................................................

70

TABLE 25: ANTENNA CABLE REQUIREMENTS ...................................................................................

71

TABLE 26: ANTENNA REQUIREMENTS................................................................................................

71

TABLE 27: RF OUTPUT POWER ...........................................................................................................

71

TABLE 28: RF RECEIVING SENSITIVITY..............................................................................................

72

TABLE 29: OPERATING FREQUENCIES...............................................................................................

72

TABLE 30: RECOMMENDED ANTENNA SPECIFICATIONS .................................................................

73

TABLE 31: ABSOLUTE MAXIMUM RATINGS ........................................................................................

78

TABLE 32: OPERATING TEMPERATURE..............................................................................................

79

TABLE 33: POWER SUPPLY RATINGS OF GSM PART (GNSS IS POWERED OFF)...........................

79

TABLE 34: POWER SUPPLY RATINGS OF GNSS PART ......................................................................

80

TABLE 35: CURRENT CONSUMPTION OF GSM AND GNSS PARTS..................................................

81

TABLE 36: CURRENT CONSUMPTION OF GSM PART (GNSS IS POWERED OFF) ..........................

81

TABLE 37: CURRENT CONSUMPTION OF THE GNSS PART..............................................................

83

TABLE 38: ESD ENDURANCE (TEMPERATURE: 25ºC, HUMIDITY: 45%) ...........................................

84

TABLE 39: REEL PACKAGING ...............................................................................................................

91

TABLE 40: RELATED DOCUMENTS ......................................................................................................

92

TABLE 41: TERMS AND ABBREVIATIONS ............................................................................................

93

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TABLE 42: DESCRIPTION OF DIFFERENT CODING SCHEMES.........................................................

97

TABLE 43: GPRS MULTI-SLOT CLASSES.............................................................................................

99

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Figure Index

 

FIGURE 1: MODULE FUNCTIONAL DIAGRAM...............................................................................................

18

FIGURE 2: PIN ASSIGNMENT .........................................................................................................................

20

FIGURE 3: ALL-IN-ONE SOLUTION SCHEMATIC DIAGRAM.........................................................................

26

FIGURE 4: STAND-ALONE SOLUTION SCHEMATIC DIAGRAM ...................................................................

26

FIGURE 5: VOLTAGE RIPPLE DURING TRANSMITTING ..............................................................................

28

FIGURE 6: REFERENCE CIRCUIT FOR THE VBAT INPUT ...........................................................................

28

FIGURE 7: REFERENCE CIRCUIT FOR THE GNSS_VCC INPUT.................................................................

29

FIGURE 8: REFERENCE CIRCUIT FOR POWER SUPPLY OF THE GSM PART ..........................................

30

FIGURE 9: REFERENCE CIRCUIT DESIGN FOR GNSS PART IN ALL-IN-ONE SOLUTION........................

31

FIGURE 10: REFERENCE CIRCUIT DESIGN FOR GNSS PART IN STAND-ALONE SOLUTION ................

31

FIGURE 11: INTERNAL GNSS’S BACKUP DOMAIN POWER CONSTRUCTION ..........................................

32

FIGURE 12: VRTC IS POWERED BY A RECHARGEABLE BATTERY ...........................................................

33

FIGURE 13: VRTC IS POWERED BY A CAPACITOR......................................................................................

33

FIGURE 14: TURN ON THE MODULE WITH AN OPEN-COLLECTOR DRIVER............................................

39

FIGURE 15: TURN ON THE MODULE WITH A BUTTON................................................................................

40

FIGURE 16: TURN-ON TIMING........................................................................................................................

41

FIGURE 17: TURN-OFF TIMING BY USING THE PWRKEY PIN ....................................................................

42

FIGURE 18: TURN-OFF TIMING OF GNSS PART BY USING AT COMMAND ...............................................

43

FIGURE 19: TURN-ON TIMING OF GSM PART ..............................................................................................

45

FIGURE 20: TURN-OFF TIMING OF GSM PART BY USING THE PWRKEY PIN ..........................................

47

FIGURE 21: REFERENCE DESIGN FOR FULL-FUNCTION UART................................................................

51

FIGURE 22: REFERENCE DESIGN FOR UART PORT (THREE LINE CONNECTION).................................

52

FIGURE 23: REFERENCE DESIGN FOR UART PORT WITH HARDWARE FLOW CONTROL ....................

52

FIGURE 24: REFERENCE DESIGN FOR FIRMWARE UPGRADE.................................................................

53

FIGURE 25: REFERENCE DESIGN FOR DEBUG PORT ...............................................................................

53

FIGURE 26: AUXILIARY AND GNSS UART PORT CONNECTION IN ALL-IN-ONE SOLUTION....................

54

FIGURE 27: AUXILIARY AND GNSS UART PORT CONNECTION IN STAND-ALONE SOLUTION ..............

55

FIGURE 28: LEVEL MATCH DESIGN FOR 3.3V SYSTEM..............................................................................

55

FIGURE 29: SKETCH MAP FOR RS-232 INTERFACE MATCH......................................................................

56

FIGURE 30: REFERENCE DESIGN FOR AIN .................................................................................................

58

FIGURE 31: HANDSET INTERFACE DESIGN FOR AOUT1 ...........................................................................

59

FIGURE 32: SPEAKER INTERFACE DESIGN WITH AN AMPLIFIER FOR AOUT1 .......................................

59

FIGURE 33: EARPHONE INTERFACE DESIGN..............................................................................................

60

FIGURE 34: LOUD SPEAKER INTERFACE DESIGN......................................................................................

60

FIGURE 35: REFERENCE CIRCUIT FOR SIM1 INTERFACE WITH AN 8-PIN SIM CARD HOLDER............

63

FIGURE 36: REFERENCE CIRCUIT FOR SIM1 INTERFACE WITH A 6-PIN SIM CARD HOLDER ..............

63

FIGURE 37: REFERENCE CIRCUIT FOR SIM2 INTERFACE WITH A 6-PIN SIM CARD HOLDER ..............

64

FIGURE 38: RI BEHAVIOR AS A RECEIVER WHEN VOICE CALLING ..........................................................

66

FIGURE 39: RI BEHAVIOR AS A CALLER .......................................................................................................

66

FIGURE 40: RI BEHAVIOR WHEN URC OR SMS RECEIVED .......................................................................

66

FIGURE 41: REFERENCE DESIGN FOR NETLIGHT .....................................................................................

67

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FIGURE 42: REFERENCE DESIGN FOR GSM ANTENNA.............................................................................

70

FIGURE 43: RF SOLDERING SAMPLE ...........................................................................................................

73

FIGURE 44: REFERENCE DESIGN WITH ACTIVE ANTENNA.......................................................................

74

FIGURE 45: REFERENCE DESIGN WITH PASSIVE ANTENNA ....................................................................

75

FIGURE 46: REFERENCE DESIGN FOR BLUETOOTH ANTENNA ...............................................................

76

FIGURE 47: MC60 TOP AND SIDE DIMENSIONS (UNIT: MM).......................................................................

85

FIGURE 48: MC60 BOTTOM DIMENSIONS (UNIT: MM).................................................................................

86

FIGURE 49: RECOMMENDED FOOTPRINT (UNIT: MM)................................................................................

87

FIGURE 50: TOP VIEW OF THE MODULE......................................................................................................

88

FIGURE 51: BOTTOM VIEW OF THE MODULE..............................................................................................

88

FIGURE 52: REFLOW SOLDERING THERMAL PROFILE..............................................................................

90

FIGURE 53: TAPE AND REEL SPECIFICATION..............................................................................................

91

FIGURE 54: DIMENSIONS OF REEL...............................................................................................................

91

FIGURE 54: RADIO BLOCK STRUCTURE OF CS-1, CS-2 AND CS-3...........................................................

97

FIGURE 56: RADIO BLOCK STRUCTURE OF CS-4.......................................................................................

98

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1 Introduction

This document defines the MC60 module and describes its hardware interface which is connected with the customer application as well as its air interface.

The document can help you quickly understand module interface specifications, as well as the electrical and mechanical details. Associated with application note and user guide, you can use MC60 module to design and set up mobile applications easily.

1.1. Safety Information

The following safety precautions must be observed during all phases of the operation, such as usage, service or repair of any cellular terminal or mobile incorporating MC60 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, Quectel assumes 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 a Airplane Mode which must be enabled prior to boarding an aircraft.

Switch off your wireless device when in hospitals, clinics or other health care facilities. These requests are desinged to prevent possible interference with sentitive medical equipment.

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

Your cellular terminal or mobile contains a transmitter and receiver. When it is ON , it receives and transmits radio frequency energy. RF interference can occur if it is used close to TV set, radio, computer or other electric equipment.

In locations with potencially explosive atmospheres, obey all posted signs to turn off wireless devices such as your phone or other cellular terminals. Areas with potencially explosive atmospheres include fuelling areas, below decks on boats, fuel or chemical transfer or storage facilities, areas where the air contains chemicals or particles such as grain, dust or metal powders, etc.

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2 Product Concept

2.1. General Description

MC60 is a multi-purpose module which integrates a high performance GNSS engine and a dual-band GSM/GPRS engine. It can work as all-in-one solution or stand-alone solution according to customers' application demands.

The dual-band GSM/GPRS engine can work at frequencies of EGSM900MHz and DCS1800MHz. MC60 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 the Appendix B &

C.

The GNSS engine is a single receiver integrating GLONASS and GPS systems. It supports multiple positioning and navigation systems including autonomous GPS, GLONASS, SBAS (including WAAS, EGNOS, MSAS and GAGAN), and QZSS. It is able to achieve the industry’s highest level of sensitivity, accuracy and TTFF with the lowest power consumption. The embedded flash memory provides capacity for storing user-specific configurations and allows for future updates.

MC60 is an SMD type module with 54 LCC pads and 14 LGA pads which can be easily embedded into applications. With a compact profile of 18.7mm × 16.0mm × 2.1mm, the module can meet almost all the requirements for M2M applications, including vehicle and personal tracking, wearable devices, security systems, wireless POS, industrial PDA, smart metering, remote maintenance & control, etc.

Designed with power saving technique, the current consumption of MC60 is as low as 1.2mA in SLEEP mode when DRX is 5 and the GNSS part is powered off. The GNSS engine also has many advanced power saving modes including standby and backup modes which can fit the requirement of low-power consumption in different scenes.

GSM part of MC60 is integrated with Internet service protocols such as TCP/UDP, PPP, HTTP and FTP. Extended AT commands have been developed for you to use these Internet service protocols easily.

EASY technology as a key feature of GNSS part of MC60 module is one kind of AGPS. Capable of collecting and processing all internal aiding information like GNSS time, ephemeris, last position, etc., the GNSS part will have a fast TTFF in either Hot or Warm start.

The module fully complies with the RoHS directive of the European Union.

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2.2. Directives and Standards

The MC60module is designed to comply with the FCC statements. FCC ID: XMR201609MC60

The Host system using MC60 should have label “contains FCC ID: XMR201609MC60”.

2.2.1. 2.2.1. FCC Statement

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

2.2.2. 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 Mobile status of this module usage. This module should NOT be installed and operating simultaneously with other radio. The manual of the host system, which uses MC60, must include RF exposure warning statement to advice user should keep minimum 20cm from the radio antenna of MC60 module depending on the Mobile status. Note: If a portable device (such as PDA) uses MC60 module, the device needs to do permissive change and SAR testing.

The following list indicates the performance of antenna gain in certificate testing.

Part

Frequency Range (MHz)

Peak Gain

Average

VSWR

Impedance

Number

(XZ-V)

Gain(XZ-V)

 

 

 

3R007

GSM850:824 894MHz

1 dBi typ.

1 dBi typ.

2 max

50Ω

PCS1900: 1850 1990MHz

 

 

 

 

 

2.3. Key Features

The following table describes the detailed features of MC60 module.

Table 1: Key Features (GMS/GPRS Part of MC60)

 

Features

 

Implementation

 

 

 

 

 

Power Supply

 

Single supply voltage: 3.3V ~ 4.6V

 

 

Typical supply voltage: 4V

 

 

 

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Typical power consumption in SLEEP mode (GNSS is powered off):

 

Power Saving

 

1.2mA@DRX=5

 

 

 

 

0.8mA@DRX=9

 

 

 

 

 

 

 

 

 

Dual-band: EGSM900, DCS1800.

 

Frequency Bands

The module can search these frequency bands automatically

 

The frequency bands can be set by AT commands

 

 

 

 

 

 

Compliant to GSM Phase 2/2+

 

 

GSM Class

Small MS

 

 

 

 

 

 

Transmitting Power

Class 4 (2W) at EGSM900

 

Class 1 (1W) at DCS1800

 

 

 

 

 

 

 

 

 

 

 

GPRS multi-slot class 12 (default)

 

GPRS Connectivity

GPRS multi-slot class 1~12 (configurable)

 

 

 

GPRS mobile station class B

 

 

 

 

 

 

 

 

GPRS data downlink transfer: max. 85.6kbps

 

 

 

GPRS data uplink transfer: max. 85.6kbps

 

 

 

Coding scheme: CS-1, CS-2, CS-3 and CS-4

 

DATA GPRS

Support the protocols PAP (Password Authentication Protocol)

 

 

usually used for PPP connections

 

 

 

 

 

 

 

Internet service protocols TCP/UDP, FTP, PPP, HTTP, NTP, PING

 

 

 

Support Packet Broadcast Control Channel (PBCCH)

 

 

 

Support Unstructured Supplementary Service Data (USSD)

 

 

Temperature Range

Operation temperature range: -35°C ~ +75°C 1)

 

Extended temperature range: -40°C ~ +85°C 2)

 

 

 

 

 

SMS

Text and PDU mode

 

SMS storage: SIM card

 

 

 

 

 

 

 

 

 

SIM Interface

Support SIM card: 1.8V, 3.0V

 

Support Dual SIM Single Standby

 

 

 

 

 

 

 

Speech codec modes:

 

 

 

Half Rate (ETS 06.20)

 

 

 

Full Rate (ETS 06.10)

 

 

 

Enhanced Full Rate (ETS 06.50/06.60/06.80)

 

Audio Features

Adaptive Multi-Rate (AMR)

 

 

 

Echo Suppression

 

 

 

Noise Reduction

 

 

 

Embedded one amplifier of class AB with maximum driving power up

 

 

 

 

to 870mW

 

 

 

 

 

 

 

 

UART Port:

 

 

 

Seven lines on UART port interface

 

UART Interfaces

Used for AT command and GPRS data

 

Used for NMEA output in all-in-one solution

 

 

 

 

 

 

Multiplexing function

 

 

 

Support autobauding from 4800bps to 115200bps

 

 

 

 

 

 

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Debug Port:

 

Two lines on debug port interface DBG_TXD and DBG_RXD

 

Debug port only used for firmware debugging

 

Auxiliary Port:

 

Two lines on auxiliary port interface: TXD_AUX and RXD_AUX

 

Used for communication with the GNSS Part in all-in-one solution

Phonebook Management

Support phonebook types: SM, ME, ON, MC, RC, DC, LD, LA

 

 

SIM Application Toolkit

Support SAT class 3, GSM 11.14 Release 99

 

 

Physical Characteristics

Size: (18.7±0.15) × (16±0.15) × (2.1±0.2)mm

Weight: Approx. 1.3g

 

Firmware Upgrade

Firmware upgrade via UART port

 

 

Antenna Interface

Connected to antenna pad with 50 Ohm impedance control

 

 

NOTES

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.

Table 2: 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

 

 

 

 

 

 

 

Table 3: Key Features (GNSS Part of MC60)

 

 

 

Features

 

Implementation

 

 

 

GNSS

 

GPS+GLONASS

 

 

 

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Power Supply

Power Consumption

Receiver Type

Sensitivity

GPS+GLONASS

Time-to-First-Fix

(EASY Enabled) 1)

Time-to-First-Fix

(EASY Disabled)

Horizontal Position

Accuracy (Autonomous)

Update Rate

Velocity Accuracy

Acceleration Accuracy

Dynamic Performance

GNSS UART Port

NOTE

Supply voltage: 2.8V~4.3V

Typical: 3.3V

Acquisition: 25mA @-130dBm (GPS)

Tracking: 19mA @-130dBm (GPS)

Acquisition: 29mA @-130dBm (GPS+GLONASS)

Tracking: 22mA @-130dBm (GPS+GLONASS)

Standby: 500uA @VCC=3.3V

Backup: 14uA @V_BCKP=3.3V

GPS L1 1575.42MHz C/A Code

GLONASS L1 1598.0625~1605.375MHz C/A Code

Acquisition: -149dBm

Reacquisition: -161dBm

Tracking: -167dBm

Cold Start: <15s average @-130dBm

Warm Start: <5s average @-130dBm

Hot Start: 1s @-130dBm

Cold Start (Autonomous): <35s average @-130dBm

Warm Start (Autonomous): <30s average @-130dBm

Hot Start (Autonomous): 1s @-130dBm

<2.5 m CEP @-130dBm

Up to 10Hz, 1Hz by default

Without aid: 0.1m/s

Without aid: 0.1m/s²

Maximum Altitude: 18,000m

Maximum Velocity: 515m/s

Acceleration: 4G

GNSS UART port: GNSS_TXD and GNSS_ RXD

Support baud rate from 4800bps to 115200bps; 115200bps by default

Used for communication with the GSM Part in all-in-one solution

Used for communication with peripherals in stand-alone solution

1) In this mode, GNSS part’s backup domain should be valid.

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Table 4: Protocols Supported by the Module

 

 

 

Protocol

 

Type

 

 

 

NMEA

Input/output, ASCII, 0183, 3.01

 

 

PMTK

Input, MTK proprietary protocol

 

 

 

NOTE

Please refer to document [2] for details of NMEA standard protocol and MTK proprietary protocol.

2.4. Functional Diagram

The following figure shows a block diagram of MC60 and illustrates the major functional parts.

Radio frequency part

Power management

Peripheral interfaces —Power supply —Turn-on/off interface —UART interface —Audio interface —SIM interface

 

 

—ADC

 

 

interface

 

 

—RF

 

 

interface

 

 

—PCM

 

 

interface

 

 

—BT

 

 

interface

 

 

—SD

 

 

interface

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Figure 1: Module Functional Diagram

2.5. Evaluation Board

In order to help you develop applications with MC60, 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 document [11].

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3 Application Functions

MC60 is an SMD type module with 54 LCC pads and 14 LGA pads. The following chapters provide detailed descriptions about these pins.

Pin of module

Power supply

Operating modes

Power on/down

Power saving

Backup domain of GNSS

Serial interfaces

Audio interfaces

SIM card interface

ADC

Behaviors of the RI

Network status indication

RF transmitting signal indication

EASY autonomous AGPS technology

EPO offline AGPS technology

Multi-tone AIC

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3.1. Pin of Module

3.1.1. Pin Assignment

Figure 2: Pin Assignment

NOTE

Keep all reserved pins open.

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3.1.2. Pin Description

Table 5: I/O Parameters Definition

Type

Description

 

 

IO

Bidirectional input/output

 

 

DI

Digital input

 

 

DO

Digital output

 

 

PI

Power input

 

 

PO

Power output

 

 

AI

Analog input

 

 

AO

Analog output

 

 

Table 6: Pin Description

Power Supply

 

PIN Name

PIN No.

I/O

Description

DC Characteristics

Comment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

It must be able to

 

 

 

 

Power supply of

VImax=4.6V

provide sufficient

 

VBAT

50, 51

PI

GSM/GPRS part:

VImin=3.3V

current up to 1.6A

 

 

 

 

VBAT=3.3V~4.6V

VInorm=4.0V

in a transmitting

 

 

 

 

 

 

burst.

 

 

 

 

 

 

 

 

 

GNSS_

 

 

Power supply of GNSS

VImax=4.3V

Assure load

 

26

PI

part:

VImin=2.8V

current no less

 

VCC

 

 

 

VBAT=2.8V~4.3V

VInorm=3.3V

than 150mA.

 

 

 

 

 

 

 

 

Power supply for GNSS’s

VImax=3.3V

 

 

 

 

 

 

VImin=1.5V

 

 

 

 

 

 

backup domain

 

 

 

 

 

 

VInorm=2.8V

 

 

 

 

 

 

 

 

 

 

VRTC

52

IO

Charging for backup

VOmax=3V

Refer to Section

 

VOmin=2V

3.3.5

 

 

 

 

 

battery or golden

 

 

 

 

 

VOnorm=2.8V

 

 

 

 

 

 

capacitor when the VBAT

 

 

 

 

 

 

IOmax=2mA

 

 

 

 

 

 

is applied.

 

 

 

 

 

 

Iin≈14uA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOmax=2.9V

1. If unused, keep

 

VDD_

43

PO

Supply 2.8V voltage for

VOmin=2.7V

this pin open.

 

EXT

external circuit.

VOnorm=2.8V

2. Recommend

 

 

 

 

 

 

 

 

IOmax=20mA

adding a

 

 

 

 

 

 

 

 

 

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2.2~4.7uF bypass

 

 

 

 

 

 

 

capacitor, when

 

 

 

 

 

 

 

using this pin for

 

 

 

 

 

 

 

power supply.

 

 

 

 

 

 

 

 

 

 

14,27,

 

 

 

 

 

 

 

31,40,

 

 

 

 

 

 

GND

42,44,

 

Ground

 

 

 

 

 

45,48,

 

 

 

 

 

 

 

49

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn on/off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PIN Name

PIN No.

I/O

Description

DC Characteristics

Comment

 

 

 

 

 

 

 

 

 

 

 

 

Power on/off key.

VILmax=

 

 

 

 

 

 

PWRKEY should be

0.1×VBAT

 

 

 

PWRKEY

5

DI

pulled down for a

VIHmin=

 

 

 

 

 

 

moment to turn on or

0.6×VBAT

 

 

 

 

 

 

turn off the system.

VIHmax=3.1V

 

 

 

Audio Interface

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PIN Name

PIN No.

I/O

Description

DC Characteristics

 

Comment

 

 

 

 

 

 

 

 

 

MICP

1,

AI

Positive and negative

 

 

If unused, keep

 

MICN

2

voice input

 

 

these pins open.

 

 

 

 

 

 

 

 

 

 

 

If unused, keep

 

SPKP

3,

 

Channel 1 positive and

 

 

these pins open.

 

AO

 

 

Support both

 

SPKN

4

negative voice output

 

 

 

 

 

 

voice and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ringtone output.

 

 

 

 

 

Refer to Section 3.8.6

 

1. If unused, keep

 

 

 

 

 

 

these pins open.

 

 

 

 

 

 

 

 

LOUD

 

 

 

 

 

2. Integrate a

 

 

 

 

 

 

ClassAB

 

SPKP

54

 

Channel 2 positive and

 

 

 

AO

 

 

amplifier

 

LOUD

53

negative voice output

 

 

 

 

 

 

internally.

 

SPKN

 

 

 

 

 

 

 

 

 

 

 

3. Support both

 

 

 

 

 

 

 

 

 

 

 

 

 

 

voice and

 

 

 

 

 

 

 

ringtone output.

 

 

 

 

 

 

 

Network Status Indicator

 

 

 

 

 

 

 

 

 

 

 

 

 

PIN Name

PIN No.

I/O

Description

DC Characteristics

 

Comment

 

 

 

 

 

 

 

 

 

 

 

 

 

VOHmin=

 

 

 

NETLIGHT

47

DO

Network status

0.85×VDD_EXT

 

If unused, keep

 

indication

VOLmax=

 

this pin open.

 

 

 

 

 

0.15×VDD_EXT

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UART Port

 

PIN Name

PIN No.

I/O

Description

DC Characteristics

Comment

 

 

 

 

 

 

 

 

TXD

33

DO

Transmit data

VILmin=0V

 

 

 

 

 

 

VILmax=

 

 

RXD

34

DI

Receive data

 

 

0.25×VDD_EXT

If only TXD, RXD

 

 

 

 

 

VIHmin=

and GND are

 

DTR

37

DI

Data terminal ready

 

0.75×VDD_EXT

used for

 

 

 

 

 

 

RI

35

DO

Ring indication

 

VIHmax=

communication, it

 

 

 

 

 

VDD_EXT+0.2

is recommended

 

DCD

36

DO

Data carrier detection

 

VOHmin=

to keep all other

 

 

 

 

 

 

 

 

 

 

 

CTS

38

DO

Clear to send

0.85×VDD_EXT

pins open.

 

 

 

 

 

VOLmax=

 

 

RTS

39

DI

Request to send

 

 

0.15×VDD_EXT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Debug Port

 

 

 

 

 

 

 

 

 

 

 

 

 

PIN Name PIN No.

I/O

Description

DC Characteristics

Comment

 

 

 

 

 

 

 

 

DBG_

29

DO

Transmit data

 

 

 

TXD

The same as UART

If unused, keep

 

 

 

 

 

DBG_

30

DI

Receive data

port

these pins open.

 

RXD

 

 

 

 

 

 

 

 

 

Auxiliary UART Port

 

 

 

 

 

 

 

 

 

 

 

 

PIN Name PIN No.

I/O

Description

DC Characteristics

Comment

 

 

 

 

 

 

 

 

 

TXD_

25

DO

Transmit data

 

 

 

 

AUX

The same as UART

Refer to Section

 

 

 

 

 

RXD_

24

DI

Receive data

port

3.2

 

 

AUX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GNSS UART Port

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PIN Name PIN No.

I/O

Description

DC Characteristics

Comment

 

 

 

 

 

 

 

 

 

GNSS_

 

 

 

VOLmax=0.42V

 

 

 

22

DO

Transmit data

VOHmin=2.4V

 

 

 

TXD

 

 

 

 

 

 

VOHnom=2.8V

Refer to Section

 

 

 

 

 

 

 

 

 

 

VILmin=-0.3V

3.2

 

 

GNSS_

23

DI

Receive data

VILmax=0.7V

 

 

 

RXD

VIHmin=2.1V

 

 

 

 

 

 

 

 

 

 

 

 

 

VIHmax=3.1V

 

 

 

SIM Interface

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PIN Name

PIN No. I/O

Description

DC Characteristics

Comment

 

 

 

 

 

 

 

 

 

SIM1_ VDD

18

PO

Power supply for SIM

The voltage can be

All signals of SIM

 

SIM2_ VDD

13

card

selected by software

interface should

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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automatically. Either

be protected

 

 

 

 

 

1.8V or 3.0V.

against ESD with

 

 

 

 

 

 

a TVS diode

 

 

 

 

 

VOLmax=

 

SIM1_ CLK

19

DO

SIM clock

0.15×SIM_VDD

array.

 

SIM2_ CLK

10

VOHmin=

Maximum trace

 

 

 

 

 

 

 

 

0.85×SIM_VDD

length is 200mm

 

 

 

 

 

VILmax=

from the module

 

SIM1_

 

 

 

0.25×SIM_VDD

pad to SIM card

 

DATA

21

 

 

VIHmin=

holder.

 

 

 

0.75×SIM_VDD

 

SIM2_

IO

SIM data

 

 

11

VOLmax=

 

 

DATA

 

 

 

 

 

 

 

0.15×SIM_VDD

 

 

 

 

 

 

VOHmin=

 

 

 

 

 

 

0.85×SIM_VDD

 

 

 

 

 

 

VOLmax=

 

 

SIM1_ RST

20

DO

SIM reset

0.15×SIM_VDD

 

 

SIM2_ RST

12

VOHmin=

 

 

 

 

 

 

 

 

 

 

0.85×SIM_VDD

 

 

 

 

 

 

 

 

 

SIM_

16

 

SIM ground

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VILmin =0V

 

 

 

 

 

 

VILmax =

Default DTR

 

 

 

 

 

0.25×VDD_EXT

 

SIM1_

 

 

 

function. Now the

 

37

I

SIM1 card detection

VIHmin =

 

PRESENCE

software does not

 

 

 

 

0.75×VDD_EXT

 

 

 

 

 

support it.

 

 

 

 

 

VIHmax =

 

 

 

 

 

 

 

 

 

 

 

VDD_EXT+0.2

 

 

ADC

 

 

 

 

 

 

 

 

 

 

 

 

 

PIN Name

PIN No.

I/O

Description

DC Characteristics

Comment

 

 

 

 

 

 

 

 

 

 

 

General purpose

Voltage range:

If unused, keep

 

ADC

6

AI

analog to digital

 

0V to 2.8V

this pin open.

 

 

 

 

converter.

 

 

 

 

 

 

 

 

 

 

 

 

Digital Audio Interface (PCM)

 

 

 

 

 

 

 

 

 

 

 

PCM_CLK

59

DO

PCM clock

 

 

 

 

 

 

 

 

 

 

PCM_OUT

60

DO

PCM data output

 

 

 

 

 

 

 

 

 

 

PCM_SYNC

61

DO

PCM frame

 

 

 

synchronization

 

 

 

 

 

 

 

 

 

PCM_IN

62

DI

PCM data input

 

 

 

 

 

 

 

 

 

SD Card Interface

 

 

 

 

 

 

 

 

 

 

 

 

SD_CMD

7

DO

SD Command line

 

 

 

 

 

 

 

 

 

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SD_CLK

8

DO

SD clock

 

 

 

 

 

 

 

 

 

 

SD_DATA

9

IO

SD data line

 

 

 

 

 

 

 

 

 

Antenna Interface

 

 

 

 

 

 

 

 

 

 

 

 

PIN Name

PIN No.

I/O

Description

DC Characteristics

Comment

 

 

 

 

 

 

 

 

RF_

41

IO

GSM antenna pad

Impedance of 50Ω

 

 

ANT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BT_

32

IO

BT antenna pad

 

 

 

ANT

 

 

 

 

 

 

 

 

 

GNSS_

15

I

GNSS signal input

Impedance of 50Ω

 

 

ANT

 

 

 

 

 

 

 

 

Other Interface

 

 

 

 

 

 

 

 

 

 

 

 

PIN Name

PIN No.

I/O

Description

DC Characteristics

Comment

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to Section

 

 

 

 

 

 

3.3.3.2 in

 

 

 

 

 

VOHmin=

all-in-one

 

GNSS_

28

O

GNSS power enabled

0.85×VDD_EXT

solution.

 

VCC_EN

VOLmax=

Keep this pin

 

 

 

 

 

0.15×VDD_EXT

open in

 

 

 

 

 

 

stand-alone

 

 

 

 

 

 

solution.

 

 

17, 46

 

 

 

 

 

 

55, 56,

 

 

 

 

 

RESERVED

57, 58,

 

 

 

Keep these pins

 

63, 64,

 

 

 

open

 

 

 

 

 

 

 

65, 66,

 

 

 

 

 

 

67, 68,

 

 

 

 

Table 7: Multiplexed Functions

PIN Name

PIN No.

Function After Reset

Alternate Function

 

 

 

 

DTR/SIM1_PRESENCE

37

DTR

SIM1_PRESENCE

 

 

 

 

3.2. Application Modes Introduction

MC60 module integrates both GSM and GNSS engines which can work as a whole (all-in-one solution) unit or work independently (stand-alone solution) according to customer demands.

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MC60 Hardware Design

In all-in-one solution, the MC60 works as a whole unit. The GNSS Part can be regarded as a peripheral of the GSM Part. This allows for convenient communication between GSM and GNSS Parts, such as AT command sending for GNSS control, GNSS part firmware upgrading, and EPO data download.

In stand-alone solution, GSM and GNSS Parts work independently, and thus have to be controlled separately.

All-in-one solution and stand-alone solution schematic diagrams are shown below.

Figure 3: All-in-one Solution Schematic Diagram

Figure 4: Stand-alone Solution Schematic Diagram

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Table 8: Comparison between All-in-one and Stand-alone Solution

 

 

All-in-one.

 

 

Stand-alone

 

 

 

Remarks

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Firmware upgrade

via

Firmware

upgrade

via

 

 

 

 

Firmware upgrade

UART

Port

(GSM

and

UART

Port (GSM

and

 

Refer to 3.7.1.3

 

GNSS

Parts

share

the

GNSS

Parts

share

the

 

for details

 

 

 

 

 

same firmware package)

same firmware package)

 

 

 

 

 

 

 

 

 

GSM

data

is

transmitted

 

 

 

 

 

Both GSM and GNSS data

through the GSM UART

 

 

 

 

 

Port.

 

 

 

 

 

 

 

 

Data transmission

are transmitted through

GNSS data is transmitted

 

 

 

 

 

the GSM UART Port

 

through the GNSS UART

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Port.

 

 

 

 

 

 

 

 

GNSS TURN ON/OFF

By AT command through

Through

the

external

 

Refer to 3.5 and

 

GSM UART Port

 

switch of MCU

 

 

 

3.6 for details

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GNSS wake up GSM

GNSS can wake up GSM

N/A

 

 

 

 

 

 

 

 

 

by interrupts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MCU

receives

the

EPO

 

 

 

 

GNSS’s EPO data

EPO data is downloaded

data which is downloaded

 

Refer to 3.14 for

 

directly through the GSM

through the GSM part, and

 

 

download

part.

 

 

 

then

transmit

it to

the

 

details

GNSS part.

3.3. Power Supply

3.3.1. Power Features

The power supply of the GSM part is one of the key issues in MC60 module design. Due to the 577us radio burst in GSM part every 4.615ms, the power supply must be able to deliver high current peaks in a burst period. During these peaks, drops on the supply voltage must not exceed the minimum working voltage of the module.

For MC60 module, the maximum current consumption could reach 1.6A during a burst transmission. It will cause a large voltage drop on the VBAT. In order to ensure stable operation of the module, it is recommended that the maximum voltage drop during the burst transmission does not exceed 400mV.

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Figure 5: Voltage Ripple during Transmitting

3.3.2. Decrease Supply Voltage Drop

3.3.2.1. Decrease Supply Voltage Drop for GSM Part

Power supply range of the GSM part is from 3.3V to 4.6V. Make sure that the input voltage will never drop below 3.3V even in a burst transmission. If the power voltage drops below 3.3V, the module will be turned off automatically. For better power performance, it is recommended to place a 100uF tantalum capacitor with low ESR (ESR=0.7Ω) and ceramic capacitors 100nF, 33pF and 10pF near the VBAT pin. A reference circuit is illustrated in the following figure.

The VBAT trace should be wide enough to ensure that there is not too much voltage drop during burst transmission. The width of trace should be no less than 2mm; and in principle, the longer the VBAT trace, the wider it will be.

Figure 6: Reference Circuit for the VBAT Input

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3.3.2.2. Decrease Supply Voltage Drop for GNSS Part

The same as VBAT, power supply range of GNSS part is from 2.8 to 4.3V. Typical GNSS_VCC peak current is 40mA during GNSS acquisition after power up. So it is important to supply sufficient current and make the power clean and stable. The decouple combination of 10uF and 100nF capacitor is recommended nearby GNSS_VCC pin. A reference circuit is illustrated in the following figure.

Figure 7: Reference Circuit for the GNSS_VCC Input

3.3.3. Reference Design for Power Supply

3.3.3.1. Reference Design for Power Supply of GSM Part

In all-in-one solution, the GSM part controls the power supply of the GNSS part. Therefore, the GSM part share the same power circuit design in both all-in-one and stand-alone solutions.

The power supply of GSM part is capable of providing sufficient current up to 2A at least. If the voltage drop between the input and output is not too high, it is suggested to use a LDO as the module’s power supply. If there is a big voltage difference between the input source and the desired output (VBAT), a switcher power converter is recommended to be used as the power supply.

The following figure shows a reference design for +5V input power source for GSM part. The designed output for the power supply is 4.0V and the maximum load current is 3A. In addition, in order to get a stable output voltage, a zener diode is placed close to the pins of VBAT. As to the zener diode, it is suggested to use a zener diode whose reverse zener voltage is 5.1V and dissipation power is more than 1 Watt.

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