SimCom SIM800L Supplément

SIM800L（MT6261）_Hardware Design_V1.01

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SIM800L(MT6261)_Hardware Design_V1.012 2016-07-07

Document Title SIM800L(MT6261)_Hardware Design_V1.01

Version 1.01

Date 2016-07-07

Status Release

Document Control ID SIM800L(MT6261)_Hardware Design_V1.01

General Notes

SIMCom offers this information as a service to its customers, to support application and engineering efforts that

use the products designed by SIMCom. The information provided is based upon requirements specifically

provided to SIMCom by the customers. SIMCom has not undertaken any independent search for additional

relevant information, including any information that may be in the customer’s possession. Furthermore, system

validation of this product designed by SIMCom 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.

This document contains proprietary technical information which is the property of SIMCom Limited, copying of

this document and giving it to others and the using or communication of the contents thereof, are forbidden

of a patent or the registration of a utility model or design. All specification supplied herein are subject to change

without notice at any time.

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SIM800L(MT6261)_Hardware Design_V1.013 2016-07-07

Contents

Table Index................................................................................................................... 6

Figure Index ................................................................................................................. 8

Version History.......................................................................................................... 10

1. Introduction........................................................................................................ 11

2. SIM800L Overview............................................................................................ 11

2.1. SIM800L ............................................................................................................................. 11

2.2. SIM800L Key Features....................................................................................................... 11

2.3. Operating Mode ..................................................................................................................13

2.4. Functional Diagram.............................................................................................................14

3. Package Information ......................................................................................... 15

3.1. Pin Out Diagram .................................................................................................................15

3.2. Pin Description....................................................................................................................15

3.3. Package Dimensions ...........................................................................................................18

4. Application Interface......................................................................................... 20

4.1. Power Supply ......................................................................................................................20

4.1.1. Power Supply Pin................................................................................................................................ 21

4.1.2. Monitoring Power Supply ................................................................................................................... 22

4.2. Power on/off Scenarios .......................................................................................................22

4.2.1. Power on SIM800L............................................................................................................................. 22

4.2.2. Power down SIM800L ........................................................................................................................ 23

4.2.3. Reset Function..................................................................................................................................... 24

4.3. Power Saving Mode ............................................................................................................ 25

4.3.1. Minimum Functionality Mode ............................................................................................................ 26

4.3.2. Sleep Mode 1 (AT+CSCLK=1) .......................................................................................................... 26

4.3.3. Wake Up SIM800L from Sleep Mode 1 ............................................................................................. 26

4.3.4. Sleep Mode 2 (AT+CSCLK=2) .......................................................................................................... 26

4.3.5. Wake Up SIM800L from Sleep Mode 2 ............................................................................................. 27

4.4. RTC Backup........................................................................................................................27

4.5. Serial Port and USB Interface.............................................................................................28

4.5.1 Function of Serial Port ........................................................................................................................ 28

4.5.2 Serial Interfaces................................................................................................................................... 29

4.5.3 Debug Interface................................................................................................................................... 31

4.5.4 Software Upgrade................................................................................................................................ 32

4.6. RI Behaviors .......................................................................................................................32

4.7. Audio Interfaces..................................................................................................................33

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4.7.1. Speaker Interfaces Configuration........................................................................................................ 34

4.7.2. Microphone Interfaces Configuration ................................................................................................. 35

4.7.3. Audio Electronic Characteristic .......................................................................................................... 35

4.7.4. TDD .................................................................................................................................................... 35

4.8. SIM Card Interface..............................................................................................................36

4.8.1. SIM Card Application ......................................................................................................................... 36

4.8.2. SIM Card Design Guide...................................................................................................................... 37

4.8.3. Design Considerations for SIM Card Holder...................................................................................... 37

4.9. PCM Interface .....................................................................................................................39

4.9.1. PCM Interface ..................................................................................................................................... 40

4.10. Keypad Interface .................................................................................................................40

4.11. I2C Bus ...............................................................................................................................42

4.12. General Purpose Input/Output (GPIO) ...............................................................................43

4.13. ADC ....................................................................................................................................43

4.14. PWM ...................................................................................................................................44

4.15. Network Status Indication...................................................................................................45

4.16. Operating Status Indication.................................................................................................45

4.17. LED Interface......................................................................................................................46

4.18. RF Synchronization Signal .................................................................................................46

4.19. Antenna Interface................................................................................................................47

4.19.1. GSM Antenna Interface ................................................................................................................... 47

4.19.2. FM Antenna Interface ...................................................................................................................... 48

5. PCB Layout ........................................................................................................ 50

5.1 Pin Assignment ...................................................................................................................50

5.2 Principle of PCB Layout .....................................................................................................50

5.2.1 Antenna Interface ................................................................................................................................ 51

5.2.2. Power Supply ...................................................................................................................................... 51

5.2.3 SIM Card Interface.............................................................................................................................. 51

5.2.4 Audio Interface.................................................................................................................................... 51

5.2.5 Others .................................................................................................................................................. 51

5.3 Recommended PCB Layout................................................................................................51

6. Electrical, Reliability and Radio Characteristics ........................................... 53

6.1 Absolute Maximum Ratings ...............................................................................................53

6.2 Recommended Operating Conditions .................................................................................53

6.3 Digital Interface Characteristics..........................................................................................53

6.4 SIM Card Interface Characteristics.....................................................................................53

6.5 SIM_VDD Characteristics ..................................................................................................54

6.6 VDD_EXT Characteristics..................................................................................................54

6.7 VRTC Characteristics .........................................................................................................54

6.8 Current Consumption (VBAT=3.8V) .................................................................................54

6.9 Electro-Static Discharge......................................................................................................55

6.10 Radio Characteristics ..........................................................................................................56

6.10.1. Module RF Output Power................................................................................................................ 56

6.10.2. Module RF Receive Sensitivity ....................................................................................................... 57

6.10.3. Module Operating Frequencies........................................................................................................ 57

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7. Manufacturing ................................................................................................... 58

7.1. Top and Bottom View of SIM800L....................................................................................58

7.2. Typical Solder Reflow Profile ............................................................................................58

7.3. The Moisture Sensitivity Level...........................................................................................59

7.4. Baking Requirements..........................................................................................................59

8. Appendix............................................................................................................. 60

I. Related Documents .............................................................................................................60

II. Terms and Abbreviations ....................................................................................................61

III. Safety Caution.....................................................................................................................63

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Table Index

TABLE 1: MODULE INFORMATION ........................................................................................................................... 11

TABLE 2: SIM800L KEY FEATURES............................................................................................................................ 11

TABLE 3: CODING SCHEMES AND MAXIMUM NET DATA RATES OVER AIR INTERFACE ............................ 13

TABLE 4: OVERVIEW OF OPERATING MODES........................................................................................................ 13

TABLE 5: PIN DESCRIPTION ....................................................................................................................................... 15

TABLE 6: RECOMMENDED ZENER DIODE .............................................................................................................. 20

TABLE 7: ELECTRONIC CHARACTERISTIC OF THE RESET PIN.......................................................................... 25

TABLE 8: THE CURRENT CONSUMPTION OF MINIMUM FUNCTIONALITY MODE(AT+CSCLK=1) ............. 26

TABLE 9: SERIAL PORT AND USB PIN DEFINITION ............................................................................................... 28

TABLE 10: SERIAL PORT CHARACTERISTICS......................................................................................................... 28

TABLE 11: VBUS OPERATION VOLTAGE .................................................................................................................. 31

TABLE 12: RI BEHAVIOURS......................................................................................................................................... 32

TABLE 13: AUDIO INTERFACE DEFINITION............................................................................................................ 33

TABLE 14: PERFORMANCE OF AUDIO AMPLIFIER................................................................................................ 34

TABLE 15: MICROPHONE INPUT CHARACTERISTICS........................................................................................... 35

TABLE 16: AUDIO OUTPUT CHARACTERISTICS .................................................................................................... 35

TABLE 17: SIM PIN DEFINITION................................................................................................................................. 36

TABLE 18: PIN DESCRIPTION (MOLEX SIM CARD HOLDER) .............................................................................. 38

TABLE 19: PIN DESCRIPTION (AMPHENOL SIM CARD HOLDER)....................................................................... 39

TABLE 20: PCM PIN DEFINITION ............................................................................................................................... 39

TABLE 21: PCM SPECIFICATION ................................................................................................................................ 40

TABLE 22: PIN DEFINITION OF THE KEYPAD INTERFACE................................................................................... 42

TABLE 23: PIN DEFINITION OF THE I2C ................................................................................................................... 43

TABLE 24: PIN DEFINITION OF THE GPIO................................................................................................................ 43

TABLE 25: PIN DEFINITION OF THE ADC................................................................................................................. 43

TABLE 26: ADC SPECIFICATION ................................................................................................................................ 44

TABLE 27: PIN DEFINITION OF THE PWM ............................................................................................................... 44

TABLE 28: BUZZER CHARACTERISTICS .................................................................................................................. 44

TABLE 29: PIN DEFINITION OF THE NETLIGHT ..................................................................................................... 45

TABLE 30: STATUS OF THE NETLIGHT PIN.............................................................................................................. 45

TABLE 31: PIN DEFINITION OF THE STATUS........................................................................................................... 45

TABLE 32: PIN DEFINITION OF THE LED ................................................................................................................. 46

TABLE 33: ISINK SPECIFICATION .............................................................................................................................. 46

TABLE 34: DEFINITION OF THE RF_SYNC PIN........................................................................................................ 46

TABLE 35: RECOMMENDED TRANSIENT VOLTAGE SUPPRESSOR .................................................................... 48

TABLE 36: ABSOLUTE MAXIMUM RATINGS........................................................................................................... 53

TABLE 37: RECOMMENDED OPERATING CONDITIONS ....................................................................................... 53

TABLE 38: DIGITAL INTERFACE CHARACTERISTICS ........................................................................................... 53

TABLE 39: SIM CARD INTERFACE CHARACTERISTICS........................................................................................ 53

TABLE 40: SIM_VDD CHARACTERISTICS................................................................................................................ 54

TABLE 41: VDD_EXT CHARACTERISTICS ............................................................................................................... 54

TABLE 42: VRTC CHARACTERISTICS ....................................................................................................................... 54

TABLE 43: CURRENT CONSUMPTION ...................................................................................................................... 54

TABLE 44: THE ESD CHARACTERISTICS (TEMPERATURE: 25℃, HUMIDITY: 45 %) ....................................... 55

TABLE 45: GSM850 AND EGSM900 CONDUCTED RF OUTPUT POWER.............................................................. 56

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TABLE 46: DCS1800 AND PCS1900 CONDUCTED RF OUTPUT POWER............................................................... 56

TABLE 47: CONDUCTED RF RECEIVE SENSITIVITY ............................................................................................. 57

TABLE 48: OPERATING FREQUENCIES..................................................................................................................... 57

TABLE 49: MOISTURE SENSITIVITY LEVEL AND FLOOR LIFE ........................................................................... 59

TABLE 50: BAKING REQUIREMENTS ....................................................................................................................... 59

TABLE 51: RELATED DOCUMENTS ........................................................................................................................... 60

TABLE 52: TERMS AND ABBREVIATIONS................................................................................................................ 61

TABLE 53: SAFETY CAUTION..................................................................................................................................... 63

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SIM800L(MT6261)_Hardware Design_V1.018 2016-07-07

Figure Index

FIGURE 1: SIM800L FUNCTIONAL DIAGRAM ......................................................................................................... 14

FIGURE 2: PIN ASSIGNMENT (TOP VIEW)................................................................................................................ 15

FIGURE 3: DIMENSIONS OF SIM800L (UNIT: MM).................................................................................................. 18

FIGURE 4: RECOMMENDED PCB FOOTPRINT OUTLINE (UNIT: MM) ................................................................ 19

FIGURE 5: REFERENCE CIRCUIT OF THE VBAT INPUT......................................................................................... 20

FIGURE 6: REFERENCE CIRCUIT OF THE LDO POWER SUPP LY ......................................................................... 20

FIGURE 7: REFERENCE CIRCUIT OF THE DC-DC POWER SUPPLY..................................................................... 21

FIGURE 8: VBAT VOLTAGE DROP DURING TRANSMIT BURST........................................................................... 21

FIGURE 9: THE MINIMAL VBAT VOLTAGE REQUIREMENT AT V B AT DROP .................................................... 22

FIGURE 10: POWERED ON/OFF MODULE USING TRANSISTOR .......................................................................... 22

FIGURE 11: POWERED ON/OFF MODULE USING BUTTON .................................................................................. 22

FIGURE 12: TIMING OF POWER ON MODULE......................................................................................................... 23

FIGURE 13: TIMING OF POWER DOWN SIM800L BY PWRKEY............................................................................ 23

FIGURE 14: TIMING OF RESTART SIM800L.............................................................................................................. 24

FIGURE 15: RESET CIRCUIT........................................................................................................................................ 25

FIGURE 16: RESET TIMING SEQUENCE.................................................................................................................... 25

FIGURE 17: RTC SUPPLY FROM CAPACITOR........................................................................................................... 27

FIGURE 18: RTC SUPPLY FROM NON-CHARGEABLE BATTERY.......................................................................... 27

FIGURE 19: RTC SUPPLY FROM RECHARGEABLE BATTERY .............................................................................. 27

FIGURE 20: CONNECTION OF THE SERIAL INTERFACES..................................................................................... 29

FIGURE 21: RESISTOR MATCHING CIRCUIT ........................................................................................................... 30

FIGURE 22: DIODE ISOLATION CIRCUIT.................................................................................................................. 30

FIGURE 23: TX LEVEL MATCHING CIRCUIT ........................................................................................................... 30

FIGURE 24: RX LEVEL MATCHING CIRCUIT ........................................................................................................... 31

FIGURE 25: USB REFERENCE CIRCUIT .................................................................................................................... 31

FIGURE 26: CONNECTION FOR SOFTWARE UPGRADING AND DEBUGGING .................................................. 32

FIGURE 27: RI BEHAVIOUR OF VOICE CALLING AS A RECEIVER...................................................................... 33

FIGURE 28: RI BEHAVIOUR OF URC OR RECEIVE SMS ........................................................................................ 33

FIGURE 29: RI BEHAVIOUR AS A CALLER ............................................................................................................... 33

FIGURE 30: SPEAKER REFERENCE CIRCUIT .......................................................................................................... 34

FIGURE 31: SPEAKER WITH AMPLIFIER REFERENCE CIRCUIT ......................................................................... 35

FIGURE 32: REFERENCE CIRCUIT OF THE 8-PIN SIM CARD HOLDER............................................................... 36

FIGURE 33: REFERENCE CIRCUIT OF THE 6-PIN SIM CARD HOLDER............................................................... 37

FIGURE 34: MOLEX 91228 SIM CARD HOLDER....................................................................................................... 38

FIGURE 35: AMPHENOL C707 10M006 512 SIM CARD HOLDER........................................................................... 39

FIGURE 36: PCM REFERENCE CIRCUIT.................................................................................................................... 40

FIGURE 37: 25 KEYS REFERENCE CIRCUIT............................................................................................................. 41

FIGURE 38: 50 KEYS REFERENCE CIRCUIT............................................................................................................. 41

FIGURE 39: KEYPAD REFERENCE CIRCUIT ............................................................................................................ 42

FIGURE 40: KEYPAD DETECTED ............................................................................................................................... 42

FIGURE 41: GPIO TIMING SEQUENCES .................................................................................................................... 43

FIGURE 42: REFERENCE CIRCUIT OF PWM DRIVER BUZZER ............................................................................ 44

FIGURE 43: REFERENCE CIRCUIT OF NETLIGHT................................................................................................... 45

FIGURE 44: LED DRIVER REFERENCE CIRCUIT..................................................................................................... 46

FIGURE 45: RF_SYNC SIGNAL DURING TRANSMIT BURST ................................................................................ 47

FIGURE 46: GSM ANTENNA MATCHING CIRCUIT.................................................................................................. 47

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FIGURE 47: GSM SIMPLE ANTENNA MATCHING CIRCUIT .................................................................................. 48

FIGURE 48: FM ANTENNA MATCHING CIRCUIT .................................................................................................... 48

FIGURE 49: GND PIN OF THE EARPHONE USE TO BE THE FM ANTENNA INTERFACE.................................. 49

FIGURE 50: PIN ASSIGNMENT.................................................................................................................................... 50

FIGURE 51: RECOMMENDED PCB LAYOUT ............................................................................................................ 52