SIMCom SIM8905X User Guide

SIM8905-EVB Kit_

User Guide

Smart Module

SIMCom Wireless Solutions Limited

Building B, SIM Technology Building, No.633, Jinzhong Road

Changning District, Shanghai P.R. China

Tel: 86-21-31575100 [email protected] www.simcom.com

SIM8905-EVB Kit_User Guide_V1.02

Document Title

Version

Date

Status

SIM8905-EVB Kit_User Guide

1.02

2020-5-22

Released

Document Control ID SIM8905-EVB Kit_User Guide_V1.02

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.

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THIS DOCUMENT CONTAINS PROPRIETARY TECHNICAL INFORMATION WHICH IS THE PROPERTY

OF SIMCOM WIRELESS SOLUTIONS LIMITED COPYING, TO OTHERS AND USING THIS DOCUMENT,

ARE FORBIDDEN WITHOUT EXPRESS AUTHORITY BY SIMCOM. OFFENDERS ARE LIABLE TO THE

PAYMENT OF INDEMNIFICATIONS. ALL RIGHTS RESERVED BY SIMCOM IN THE PROPRIETARY

TECHNICAL INFORMATION ， INCLUDING BUT NOT LIMITED TO REGISTRATION GRANTING OF A

PATENT , A UTILITY MODEL OR DESIGN. ALL SPECIFICATION SUPPLIED HEREIN ARE SUBJECT TO

CHANGE WITHOUT NOTICE AT ANY TIME.

SIMCom Wireless Solutions Limited

Building B, SIM Technology Building, No.633 Jinzhong Road, Changning District, Shanghai P.R.China

Tel: +86 21 31575100

Email: [email protected]

For more information, please visit:

https://www.simcom.com/download/list-863-en.html

For technical support, or to report documentation errors, please visit:

https://www.simcom.com/ask/ or email to: [email protected]

Copyright © 2020 SIMCom Wireless Solutions Limited All Rights Reserved

.

www.simcom.com 2 / 56

Version History

Revision Date

V1.01

2018.02.28

V1.02

2020.05.22

SIM8905-EVB Kit_User Guide_V1.02

Author

Bing Li

Bing Li

Description

Origin

Modify document template format www.simcom.com 3 / 56

SIM8905-EVB Kit_User Guide_V1.02

Contents

Version History ..................................................................................................................................... 3

Contents ................................................................................................................................................ 4

SCOPE ................................................................................................................................................... 9

1.

Introduction ................................................................................................................................. 10

2.

General Overview ........................................................................................................................ 11

2.1

Key Features ............................................................................................................................ 11

2.2

Interface Overviews .................................................................................................................. 12

2.3

Top Views of SIM8905 EVB ...................................................................................................... 19

2.4

Top and Bottom Views of SIM8905 TE ..................................................................................... 20

2.5

SIM8905 EVB Kit Accessories .................................................................................................. 22

3.

SIM8905 EVB Kit Accessories Assmbly .................................................................................... 24

4.

Interface Applications ................................................................................................................. 25

4.1

Power Supply Interface (J101, J103)........................................................................................ 25

4.1.1

Adapter Interface .............................................................................................................. 26

4.1.2

Battery Interface ................................................................................................................ 28

4.1.3

Switches for Power Supply ............................................................................................... 29

4.2

TE Interface (J801, J802) ......................................................................................................... 30

4.3

LCM Interface ........................................................................................................................... 33

4.3.1

LCM Interface ........................................................................................................................ 33

4.3.2

Backlight Driver for LCM Interface ......................................................................................... 33

4.4

Touch Panel Interface ............................................................................................................... 34

4.5

Camera Interfaces .................................................................................................................... 35

4.6

USB Interfaces ......................................................................................................................... 37

4.7

Audio Interfaces ....................................................................................................................... 38

4.7.1

Loudspeaker Interface ...................................................................................................... 38

4.7.2

Headset Interface .............................................................................................................. 38

4.7.3

Handle............................................................................................................................... 40

4.8

USIM Interfaces ........................................................................................................................ 42

4.9

UART Interfaces ....................................................................................................................... 43

4.10

SD Card Interface ..................................................................................................................... 45

4.11

Sensors .................................................................................................................................... 45

4.12

Vibrator ..................................................................................................................................... 46

4.13

Buttons ..................................................................................................................................... 46

4.14

Status Indication LEDs ............................................................................................................. 47

4.15

Forced USB BOOT Interface .................................................................................................... 47

5.

Operation Procedures Illustration............................................................................................ 49

5.1

Power ON Smart Modules ........................................................................................................ 49

5.2

Communication Via USB or UART Interface ............................................................................ 50

5.2.1

Communication via USB Interface .................................................................................... 50

www.simcom.com 4 / 56

SIM8905-EVB Kit_User Guide_V1.02

5.2.2

Communication via UART Interface .................................................................................. 51

5.3

Firmware Upgrade .................................................................................................................... 52

5.4

Power OFF Smart Modules ...................................................................................................... 53

6.

Appendix .................................................................................................................................... 55

6.1

References ............................................................................................................................... 55

6.2

Terms and Abbreviations .......................................................................................................... 55

6.3

Safety Information .................................................................................................................... 56

www.simcom.com 5 / 56

SIM8905-EVB Kit_User Guide_V1.02

Table Index

Table 1: Key Features ..................................................................................................................................................................... 11

Table 2: Interfaces of SIM8905 EVB ............................................................................................................................................. 17

Table 3: Accessories List ................................................................................................................................................................ 22

Table 5: Pin Definition of Battery Interface ................................................................................................................................... 28

Table 6: Description of Power Supply Switches .......................................................................................................................... 29

Table 7: Pin Definition of B2B Connectors ................................................................................................................................... 30

Table 8: Pin Definition of Touch Panel Interfaces ........................................................................................................................ 34

Table 9: Pin Definition of Micro USB Interface ............................................................................................................................. 37

Table 10: Pin Definition of Headset Interface ............................................................................................................................... 39

Table 11: Pin Definition of Handle Interface ................................................................................................................................. 41

Table 12: Pin Definition of USIM Card Connector ....................................................................................................................... 42

Table 13: Pin Definition of UART Port ........................................................................................................................................... 44

Table 14: PWRKEY / VOL + / VOL key combination .................................................................................................................. 47

Table 15: Related Documents ........................................................................................................................................................ 55

Table 16: Terms and Abbreviations ............................................................................................................................................... 55

Table 17: Safety Caution ................................................................................................................................................................. 56

www.simcom.com 6 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure Index

Figure 1: Module / TE / EVB functional block diagram ................................................................................................................... 12

Figure 2: Front view of EVB board ................................................................................................................................................ 13

Figure 3: Rear view of EVB board ................................................................................................................................................. 14

Figure 4: SIM8905 EVB PCBA Top View ..................................................................................................................................... 15

Figure 5: SIM8905 EVB PCBA Bottom View ............................................................................................................................... 16

Figure 6: SIM8905 EVB Top View ................................................................................................................................................. 19

Figure 7: SIM8905 TE Top View .................................................................................................................................................... 20

Figure 8: SIM8905 TE Bottom View .............................................................................................................................................. 20

Figure 9: SIM8905 TE PCBA Top View ........................................................................................................................................ 21

Figure 10: SIM8905 TE PCBA Bottom View ................................................................................................................................ 21

Figure 11: SIM8905 EVB Kit Accessories .................................................................................................................................... 22

Figure 12: SIM8905 EVB Kit Accessories Assembly .................................................................................................................. 24

Figure 13: Power Supply Diagram .................................................................................................................................................... 26

Figure 14: Placement of EVB power supply ..................................................................................................................................... 27

Figure 15: Power Plug Design .......................................................................................................................................................... 27

Figure 16: Reference Design for Battery Interface ........................................................................................................................... 28

Figure 17: Pin Assignment of Battery Interface ................................................................................................................................ 28

Figure 18: Power Supply Switches ................................................................................................................................................... 29

Figure 19: B2B Connectors ............................................................................................................................................................... 30

Figure 20: Reference Design for Main LCM Interface ..................................................................................................................... 33

Figure 21: Reference Design for Backlight Driver ........................................................................................................................... 33

Figure 22: Reference Design for Touch Panel Interfaces .................................................................................................................. 34

Figure 23: Pin Assignments of Touch Panel Interfaces ..................................................................................................................... 34

Figure 24: Reference Design for Rear Camera Interface .................................................................................................................. 35

Figure 25: Reference Design for Camera Interfaces ......................................................................................................................... 36

Figure 26: Camera Interfaces with Cameras Assembled ................................................................................................................... 36

Figure 27: Reference Design for USB Interfaces .............................................................................................................................. 37

Figure 28: USB Interfaces ................................................................................................................................................................. 37

Figure 29: Reference Design for Loudspeaker Interface ................................................................................................................... 38

Figure 30: Reference Design for Headset Interface .......................................................................................................................... 39

Figure 31: Pin Assignment of Headset Interface ............................................................................................................................... 39

Figure 32: The order of Headset interface ......................................................................................................................................... 40

Figure 33: Reference Design for Earphone Interface ........................................................................................................................ 40

Figure 34: EMC microphone reference circuit .................................................................................................................................. 41

Figure 35: Handle Interface .............................................................................................................................................................. 41

Figure 36: Reference Design for USIM Card Interface..................................................................................................................... 42

Figure 37: Pin Assignment of USIM1 Card Connector ..................................................................................................................... 42

Figure 38: Reference Design for Uart Interface ................................................................................................................................ 43

Figure 39: Pin Assignment of UART Port (Bottom View) ................................................................................................................ 44

Figure 40: SD card reference circuit ................................................................................................................................................. 45

Figure 41: Sensors............................................................................................................................................................................. 45

Figure 42: Vibrator reference circuit ................................................................................................................................................. 46

Figure 43: Buttons............................................................................................................................................................................. 46

Figure 44: Status Indication LED ...................................................................................................................................................... 47

www.simcom.com 7 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 45: Emergency download reference circuit ...................................................................................................................... 48

Figure 46: Emergency download ................................................................................................................................................... 48

Figure 47: LCD Display Indicating Module’s Power-on .................................................................................................................. 50

Figure 48: USB COM Ports .............................................................................................................................................................. 50

Figure 49: “adb shell” Command ...................................................................................................................................................... 51

Figure 50: USB Serial Port ............................................................................................................................................................... 51

Figure 51: SIMCom Serial Port Tool Introduction ........................................................................................................................ 52

Figure 52: Firmware Upgrade Steps ................................................................................................................................................. 53

Figure 53: LCD Display Indicating Module’s Power-off .................................................................................................................. 54

www.simcom.com 8 / 56

SIM8905-EVB Kit_User Guide_V1.02

SCOPE

THIS DOCUMENT DESCRIBES HOW TO USE SIMCOM EVB AND TE BOARDS TO DO TEST; USER

CAN GET USEFUL INFO ABOUT SIMSIM8905 QUICKLY THROUGH THIS DOCUMENT.

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE AT ANY TIME. www.simcom.com 9 / 56

SIM8905-EVB Kit_User Guide_V1.02

1. Introduction

SIM8905 module is a smart module newly released by SIMCom Wireless Solutions. It has Android operating system, the customers could use this module for the development of the hand devices, without

MCU or other external device.

The functions the module supports include LCM, touch panel, camera, audio, charging, dual USIM, etc. For the fast understanding of the module’s characters, we developed an EVB （ SIM8905-EVB ） for customers.

By operation of the EVB, the customers could complete the development and advanced research for

SIM8905.

This document shows the usage of SIM8905-EVB, the users can get useful information about SIM8905 quickly through this document, and develop quickly and independently. This document applies to

SIM8905-EVB. www.simcom.com 10 / 56

SIM8905-EVB Kit_User Guide_V1.02

2. General Overview

SIMCom supplies SIM8905-EVB for designers to develop applications based on SIM8905 module.

This EVB can test basic functionalities of the module.

2.1 Key Features

Table 1: Key Features

Features Description

Power Supply

LCM Interface

●

DC Power Supply:4.8V~6V(typical:5V)

●

VBAT:3.4V~4.4V(typical:3.8V)

●

One 4.66 inch, 720*1280 QHD resolution TFT LCD

●

4-lane MIPI DSI interface for LCD

Touch Panel Interfaces One capacitive touch panel

Camera Interfaces Support two cameras:

●

Rear camera supports 5M pixels with 2-lane CSI interface

USB Interface

Audio Interfaces

USIM Interfaces

UART Interface

SD Card Interface

●

Front camera supports 0.3M pixels with 1-lane CSI interface

Mirco USB interface

●

One Mirco USB used for charging,data transmission,software debugging and firmware upgrade

Support USB OTG (Eternal 5V power supply is required, such as Adapter on

J101).

Analog Input:

2 groups of analog microphone inputs, integrating internal bias voltage. 

●

One headset input

●

One ECM-type microphone input

Analog Output:

3 groups of analog audio outputs, including:

●

One stereo headset output

●

One mono earphone differential output

●

One mono loudspeaker differential amplifier output

●

Support USIM/SIM cards: 1.8V and 2.95V

●

Support dual SIM dual standby

Two UART interfaces:

●

Debug UART for debugging

●

Main UART is not used by default

Support 4-bit SD card with hot-plug detection www.simcom.com 11 / 56

SIM8905-EVB Kit_User Guide_V1.02

Sensors Support two sensors including ALS/PS, accelerometer/gyroscope

Vibrator A vibrator for testing the motor drive interface of the module

Switches and Buttons 2 switches including one power supply switche and one USB switch;

4 buttons including RESET, PWRKEY, VOL_UP and VOL_DOWN;

12 buttons including(0~9, *, #);

Physical Characteristics Size: 23cm × 17.65cm

2.2 Interface Overviews

SIM8905_EVB

_DN _DP

Micro

USB

S

_VB

Adapter

LDO BATTERY

AT

VB

FLASH

LED

I

IP

_CS

0

I

IP

_CS

1

CAMER_REAR

CAMER_FRONT

SIM8905_TE

LCM

DB9 1#

J605

DB9 2#

J606

TP_CON

BACKLIGHT

DRIVER

TF Card

Handset

Headset

SPEAKER

Level

Shift

SP3238

TP_I2C

PWM

SD

EAR_P/N

MIC1_P/N

HPH_L/R

MIC2_P

SPK_P/N

Y

ER

W

_PO

Y

KE

_UP

Y

N

W

_DO

T

SE

Y

KE

Y

ER

W

_PO

Y

KE

_UP

Y

N

W

_DO

T

SE

Y

KE

SIM8905

S

/AL

T

IN

O EL

AC

/

`

USB_BOOT

RTC

WIFI_ANT

MAIN_ANT

GPS_ANT

DIV_ANT

FORCE_USB

_BOOT

RTC

D

_AN

G

_AN

G

_AN

T

_AN

N

AI

I

I

IF

W

IF

W

Figure 1: Module / TE / EVB functional block diagram www.simcom.com 12 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 2: Front view of EVB board www.simcom.com 13 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 3: Rear view of EVB board www.simcom.com 14 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 4: SIM8905 EVB PCBA Top View www.simcom.com 15 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 5: SIM8905 EVB PCBA Bottom View www.simcom.com 16 / 56

SIM8905-EVB Kit_User Guide_V1.02

Table 2: Interfaces of SIM8905 EVB

Interface

DC5V Input

VBAT

Reference

Number

J101

J103

S101

Power Supply

Switches

J102

J104

PWRKEY S701

RESET

VOL_UP

VOL_DOWN

USB

Audio

S702

S716

S715

J604

J401

J404

J403

J601

USIM

J602

UART

SD

LEDs

TE-Connector

J605

J606

J603

LED101

J801, J802

J301

Cameras

LCM and TP

Sensors

J302

J201

J202

U501

U502

J402 Vibrator

Coin Cell B1601

UART to RS232 U601

Description

●

The power jack on the EVB. Typical power supply: +5.0V

●

Li-polymer battery connector

●

Used to select LDO as VBAT power supply of Module or battery Charging power supply

●

Used to select the way of charging between DC power supply and Mirco USB power supply

●

Used to connect VBAT Power supply to VBAT of the TE board.

Power key (push button)

Used to turn on/off the module

Reset key (push button)

Used to return on the module

Used to turn the volume up

Used to turn the volume down

●

Micro USB connector

●

Used for loudspeaker

●

Used for headset

●

Used for handle

●

USIM1 card connector

●

USIM2 card connector

Main UART port (RS232)

Debug UART port (RS232)

SD card connector

LED101 indicates the power supply of the module

Used to connect the TE board

Rear camera connector (connector on EVB Bottom Layer),

Support 5M CMOS sensor

Front camera connector, support 0.3M CMOS sensor

ZIF connector for main LCM

ZIF connector for main touch panel

Accelerometer and gyroscope sensor

Ambient light sensor and proximity sensor

Motor driver interface

Coin cell battery for RTC power supply

Level Shifter between UART1/UART2 and RS232 www.simcom.com 17 / 56

Level Shifter U603

SIM8905-EVB Kit_User Guide_V1.02

Level Shifter of UART1/UART2 between 1.8V and 3V www.simcom.com 18 / 56

2.3 Top Views of SIM8905 EVB

SIM8905-EVB Kit_User Guide_V1.02

Figure 6: SIM8905 EVB Top View www.simcom.com 19 / 56

2.4 Top and Bottom Views of SIM8905 TE

SIM8905-EVB Kit_User Guide_V1.02

Figure 7: SIM8905 TE Top View

Figure 8: SIM8905 TE Bottom View www.simcom.com 20 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 9: SIM8905 TE PCBA Top View

Figure 10: SIM8905 TE PCBA Bottom View www.simcom.com 21 / 56

SIM8905-EVB Kit_User Guide_V1.02

2.5 SIM8905 EVB Kit Accessories

All accessories of the SIM8905 EVB kit are listed as below. Please contact the supplier if there is something missing.

Figure 11: SIM8905 EVB Kit Accessories

Table 3: Accessories List

Items Description Quantity

Adapter 1

1

Cables

Antennas

DC 5V Output

USB cable

USB to UART converter cable

RF cables

Main/Diversity antennas

Wi-Fi antenna

1

3

2

1 www.simcom.com 22 / 56

Cameras

GNSS antenna

(active)

Rear Camera

Module

Front Camera

Module

1

1

1

SIM8905-EVB Kit_User Guide_V1.02 www.simcom.com 23 / 56

SIM8905-EVB Kit_User Guide_V1.02

3. SIM8905 EVB Kit Accessories

Assmbly

Figure 12: SIM8905 EVB Kit Accessories Assembly www.simcom.com 24 / 56

SIM8905-EVB Kit_User Guide_V1.02

4. Interface Applications

This chapter describes the hardware interfaces of SIM8905 EVB , shown as follows:

●

Power supply interfaces

●

TE-Connector interface

●

LCM interface

●

Touch panel interface

●

Camera interfaces

●

USB interfaces

●

Audio interfaces

●

USIM interfaces

●

UART interface

●

SD card interface

It also provides information about flashlight, sensors, vibrator, buttons, status indication LED and test points to help customers use the SIM8905 EVB.

NOTE

If the customer wants to use the forced download function, the S101 of the TE board needs to be shorted.

4.1 Power Supply Interface (J101, J103)

There are two power supply methods for SIM8905-EVB:

Method 1:

It is powered by a 5V adapter, which is powered down by the LDO on the EVB board to 4.2V to supply power to the SIM8905 module. When the adapter is used for power supply, the switch S101 needs to be www.simcom.com 25 / 56

SIM8905-EVB Kit_User Guide_V1.02 switched to VBAT to ensure the conduction of the path. The function of S101 here is to avoid the inconvenience of frequently plugging and unplugging the adapter when the adapter is powered, and only need to toggle the switch and short connect J102 to realize the charging function when charging with the adapter.

Method 2:

The module is powered by the battery 3.5V-4.4V: In order to prevent the adapter and the battery from being connected at the same time, the MOS control (Q102) is added to the battery power supply path. When the adapter is inserted, the MOS (Q102) disconnects the battery powered by.

In order to facilitate the user to test the current consumption of the module, the VBAT and GND test points are added to the TE Board. The customer can test the power consumption of the module by powering the

VBAT test point and disconnecting the jumper J104.

When the module is powered by an adapter, it is necessary to pull down BATT_THERM (Pin 134) of

SIM8905 module to GND with a 47K resistor, otherwise charging and power supply will be abnormal.

The priority selection of EVB adapter or battery power supply is as follows:

MIRCO

USB

J604

Adapter

J101

Battery

J103

S101

Q102

J102

LDO

U101

J104

VBUS

VBAT

SIM8905

Module

Figure 13: Power Supply Diagram

Customer can choose to use S101 to select charge function or not.

If the customers do not want to use charge function, they may disconnect jumper J102, then S101 will be the switch for the power control.

4.1.1 Adapter Interface

The following figure shows the DC power jack of the SIM8905 EVB. www.simcom.com 26 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 14: Placement of EVB power supply

Before connecting the power supply, customers have to select a proper +5V DC power adapter to supply power for the SIM8905 EVB, and the power plug design of the adapter is shown as below.

Figure 15: Power Plug Design www.simcom.com 27 / 56

SIM8905-EVB Kit_User Guide_V1.02

4.1.2 Battery Interface

The following figure shows a reference circuit design for battery interface.

Figure 16: Reference Design for Battery Interface

The following figure shows the pin assignment of battery interface, and the following table shows the pin definition of battery connector.

Figure 17: Pin Assignment of Battery Interface

Table 4: Pin Definition of Battery Interface

Pin No.

1

2

3

Pin Name

VBAT

THERM

GND

Description

Power input pins.

Connect to the positive pole of the battery.

Used for battery temperature detection.

A 47K thermistor is used for the battery protection circuit.

Ground pins.

Connected to the negative pole of the battery. www.simcom.com 28 / 56

SIM8905-EVB Kit_User Guide_V1.02

4.1.3 Switches for Power Supply

The switches for power supply are shown in following figure.

J102 is used to select the way of charging between DC power supply and Mirco USB power supply. J104 is used to connect VBAT Power supply to VBAT of the TE board. S101 is used to select LDO as VBAT power supply of Module or battery Charging power supply.

Figure 18: Power Supply Switches

Table 5: Description of Power Supply Switches

Switch No.

J102

J104

Description

Used to select the way of charging between DC power supply and Mirco

USB power supply.

Used to connect VBAT Power supply to VBAT of the TE board.

S101

Used to select LDO as VBAT power supply of Module or battery Charging power supply. www.simcom.com 29 / 56

SIM8905-EVB Kit_User Guide_V1.02

4.2 TE Interface (J801, J802)

The TE interface supports SIM8905 module, and includes two B2B connectors named J801 and J802.The

TE board is connected to the EVB via the two connectors.

With the Smart module, customers can easily design wireless communication products.

The following two figures show the two B2B connectors.

8

9

10

11

12

13

14

3

4

5

6

7

Figure 19: B2B Connectors

The following table describes the pin definition of the two B2B connectors J801 and J802.

Table 6: Pin Definition of B2B Connectors

J801

1

2

Pin Name of J801

VBAT_MOD

VBAT_MOD

J802

1

2

Pin Name of J802

MIPI_CSI1_CLKP

MIPI_CSI1_CLKN

VBAT_MOD

VBAT_MOD

VBAT_MOD

VBAT _THERM

GND

ADC

GND

RESET

PWRKEY

NC

GPIO_32

SENSOR_I2C_SDA

8

9

10

11

12

13

14

3

4

5

6

7

MIPI_CSI1_D0P

MIPI_CSI1_D0N

USIM1_DET

USIM2_DET

CAM_I2C_SCL

CAM_I2C_SDA

GND

GPIO_31

GPIO_23

NC

GND

MIPI_CSI0_CLKP www.simcom.com 30 / 56

40

41

42

43

36

37

38

39

32

33

34

35

28

29

30

31

24

25

26

27

20

21

22

23

15

16

17

18

19

48

49

50

51

44

45

46

47

52

53

54

55

SENSOR_I2C_SCL

UART1_RTS

UART1_CTS

UART1_RX

UART1_TX

UART2_RX

UART2_TX

GPIO_58

GPIO_99

GPIO_95

GPIO_11

GPIO_10

GPIO_9

GPIO_8

GPIO_16

GPIO_17

GND

SD_DATA3

SD_DATA2

SD_DATA1

SD_DATA0

SD_CLK

GND

SD_LDO11

SD_DET

SD_CMD

GPIO_94/ALSP_INT_N

NC

NC

GPIO_96/ACCL_INT1_N

GPIO_65/ACCL_INT2_N

NC

NC

GPIO_36/MAG_INT_N

NC

NC

NC

NC

NC

VOL_UP

VOL_DOWN

SIM8905-EVB Kit_User Guide_V1.02

MIPI_CSI0_CLKN

MIPI_CSI0_D1P

MIPI_CSI0_D1N

MIPI_CSI0_D0P

MIPI_CSI0_D0N

GND

NC

LDO17_2P85

LDO17_2P85

LCD_RST

NC

LCD_TE

PWM

GND

MIPI_DSI_D3N

MIPI_DSI_D3P

MIPI_DSI_D2P

MIPI_DSI_D2N

MIPI_DSI_D1P

MIPI_DSI_D1N

MIPI_DSI_D0P

MIPI_DSI_D0N

GND

MIPI_DSI_CLKP

MIPI_DSI_CLKN

GND

USIM1_CLK

USIM1_DATA

USIM1_RST

USIM1_VDD

GND

USIM2_CLK

USIM2_DATA

USIM2_RST

USIM2_VDD

GND

NC

NC

VIB_DRV_N

LDO6_1P8

CAM0_RST

43

44

45

46

39

40

41

42

35

36

37

38

31

32

33

34

51

52

53

54

55

47

48

49

50

27

28

29

30

23

24

25

26

19

20

21

22

15

16

17

18 www.simcom.com 31 / 56

73

74

75

76

69

70

71

72

77

78

79

80

65

66

67

68

61

62

63

64

56

57

58

59

60

NC

NC

VBUS

USB_DN

USB_DP

USB_ID

GND

NC

GPIO_92

GPIO_88

GPIO_89

GPIO_0

GPIO_98

GPIO_69

GPIO_68

GPIO_97

GPIO_110

VCOIN

CHARGE_SEL

VBAT_SNS

GND

GND

GND

GND

GND

68

69

70

71

64

65

66

67

60

61

62

63

56

57

58

59

76

77

78

79

80

72

73

74

75

SIM8905-EVB Kit_User Guide_V1.02

CAM0_PWDN

CAM0_MCLK

GND

TP_RST_N

TP_INT_N

TP_I2C_SDA

TP_I2C_SCL

GND

HS_DET

SPK_N

SPK_P

EAR_N

EAR_P

HPH_L

HPH_GND

HPH_R

NC

MIC2P

MIC1P

MIC_GND

GND

CAM1_MCLK

CAM1_RST

GND

CAM1_PWDN www.simcom.com 32 / 56

SIM8905-EVB Kit_User Guide_V1.02

4.3 LCM Interface

4.3.1 LCM Interface

The SIM8905 EVB provides a LCM interface and can be equipped with a LCD module. Currently the

SIM8905 EVB provides a 4.66-inch 1280

×

720 HD resolution liquid crystal display.

Module

PWM

LDO17_2V85

LDO6_1V8

LCD_RST_N

LCD_TE

MIPI_DSI_CLK_M

MIPI_DSI_CLK_P

MIPI_DSI_LANE0_M

MIPI_DSI_LANE0_P

MIPI_DSI_LANE1_M

MIPI_DSI_LANE1_P

MIPI_DSI_LANE2_M

MIPI_DSI_LANE2_P

MIPI_DSI_LANE3_M

MIPI_DSI_LANE3_P

VBAT

1M

1uF

WLED driver

1uF

LED+

LED-

J201

LCM

1 GND

2 LED+

3 LED_

4 GND

5 VCC(2.8V)

6 GND

7 VDDIO(1.8V)

8 RESET

9 TE

10 LCD_ID

11 GND

12 DSI_CLK-

13 DSI_CLK+

14 GND

15 DSI_D0-

16 DSI_D0+

17 GND

18 DSI_D1-

19 DSI_D1+

20 GND

21 DSI_D2-

22 DSI_D2+

23 GND

24 DSI_D3-

25 DSI_D3+

Figure 20: Reference Design for Main LCM Interface

4.3.2 Backlight Driver for LCM Interface

The SIM8905 EVB uses a PWM dimming step-up LED driver for the WLED backlighting of LCM interface.

The following figure shows a reference circuit design for the backlight driver.

10uH

B1

VBAT

PWM

R1_100K

VIN

VOUT

EN

LX

GND

FB

KTD256EHD

B2

R2_10R

VLED_P

VLED_N

Figure 21: Reference Design for Backlight Driver www.simcom.com 33 / 56

SIM8905-EVB Kit_User Guide_V1.02

4.4 Touch Panel Interface

The SIM8905 EVB provides a touch panel interfaces: J202

J202 is used for the connection between touch panel interfaces of LCM and EVB.

The following figure shows a reference design for touch panel interfaces.

LDO5_1V8 LDO5_1V8

MODULE

TP_I2C_SDA

TP_I2C_SCL

TP_RST_N

TP_INT_N

LDO17_2V85

GND

2.2K

2.2K

10K

J202

TP MODULE

1 SDA

2 SCL

3 RST

4 INT

5 VDD

6 GND

1uF 33pF

Figure 22: Reference Design for Touch Panel Interfaces

The following figure shows the pin assignments of touch panel interfaces, and the following table shows the pin definition of touch panel interfaces.

Figure 23: Pin Assignments of Touch Panel Interfaces

Table 7: Pin Definition of Touch Panel Interfaces

Pin No. Pin Name Description

1

2

3

4

5

TP_I2C_SDA I2C data signal of touch panel

TP_I2C_SCL I2C clock signal of touch panel

TP_RST

TP_INT

VDD

Reset signal of touch panel

Interrupt signal of touch panel

2.85V power supply for touch panel VDD power

Comment

Active low www.simcom.com 34 / 56

SIM8905-EVB Kit_User Guide_V1.02

6 GND Ground

4.5 Camera Interfaces

SIM8905 EVB provides two camera interfaces (2-lane+1-lane) with rear camera and front camera assembled.

● The rear camera uses a 5M pixels digital CMOS sensor with auto-focusing function.

● The front camera uses a 0.3M pixels digitals CMOS sensor with auto-focusing function.

The following figure shows a reference design for camera interfaces.

Module

LDO17_2V85

MIPI_CSI0_CLK_P

MIPI_CSI0_CLK_M

LDO6_1V8

CAM0_MCLK

MIPI_CSI0_LN0_P

MIPI_CSI0_LN0_M

CAM_I2C_SCL

CAM_I2C_SDA

CAM0_RST_N

CAM0_PWDN

MIPI_CSI0_LN1_P

MIPI_CSI0_LN1_M

2.2K

2.2uF 2.2uF

2.2K

J301

100nF 100nF

Rear

Camera

1 AGND

2 VCM

3 MCP

4 AVDD

5 MCN

6 DVDD

7 GND

8 DOVDD

9 NC

10 NC

11 NC

12 MCLK

13 GND

14 NC

15 MDP0

16 NC

17 MDN0

18 SCL

19 GND

20 SDA

21 NC

22 RESET

23 NC

24 PWDN

25 GND

26 SHUTTER

27 MDP1

28 NC

29 MDN1

30 NC

Figure 24: Reference Design for Rear Camera Interface www.simcom.com 35 / 56

SIM8905-EVB Kit_User Guide_V1.02

Module

MIPI_CSI1_CLK_M

MIPI_CSI1_CLK_P

MIPI_CSI1_LN0_M

MIPI_CSI1_LN0_P

CAM1_PWDN

LDO17_2V85

LDO6_1V8

CAM_I2C_SDA

CAM_I2C_SCL

CAM1_RST_N

CAM1_MCLK

2.2K

2.2K

2.2uF

2.2uF

J302

Front

Camera

1 GND

2 MCN

3 MCP

4 GND

5 MDN0

6 MDP0

7 GND

8 MDN1

9 MDP1

10 GND

11 NC

12 PWDN

13 GND

14 AVDD

15 DVDD

16 IOVDD

17 SDA

18 SCL

19 RESET

20 GND

21 MCLK

22 GND

23 NC

24 NC

25 NC

Figure 25: Reference Design for Camera Interfaces

The following figure shows the camera interfaces with cameras assembled.

Figure 26: Camera Interfaces with Cameras Assembled www.simcom.com 36 / 56

SIM8905-EVB Kit_User Guide_V1.02

4.6 USB Interfaces

The SIM8905 EVB provides Micro USB interface. The Micro USB interface complies with the USB 2.0 specifications and supports high speed (480 Mbps) on USB 2.0 and full speed (12 Mbps) modes.

The following figure shows a reference circuit design for USB interfaces.

USB_VBUS

External

5V(J101)

S101/J102

J604

VBUS

USB_DP USB_DP

USB_DM USB_DM

USB_ID USB_ID

<1pF

GND

Module

GND

Connector

Figure 27: Reference Design for USB Interfaces

The following figure shows the USB interfaces

Figure 28: USB Interfaces

Table 8: Pin Definition of Micro USB Interface

Pin No. Pin Name Description

1 USB_VBUS

Used for USB detection and power supply of OTG equipment

2

3

USB_DM

USB_DP

USB differential bus

Comment

www.simcom.com 37 / 56

SIM8905-EVB Kit_User Guide_V1.02

4

5

USB_ID

GND

USB ID signal

Ground

4.7 Audio Interfaces

SIM8905 EVB provides three analog audio outputs including one mono loudspeaker, one mono earphone, and one stereo headset. The SIM8905 EVB also provides two analog audio inputs including one single-ended and one differential microphone inputs. One single-ended microphone input is used for headset interface. One differential microphone inputs are used for microphone interfaces.

The audio interface provided by SIM8905-EVB board is as follows:

●

Earphones: J404; 3.5mm 4-segment earphones; EVB board can only support national earphones

(earphone detection pins HS_DET and HPH_L form a detection circuit. There is a pull-down resistor inside

HPH_L, when no headphones are inserted, HS_DET and HPH_L are connected, which is low power Flat;

HS_DET and HPH_L are disconnected when the headset is plugged in, which is a high level)

●

Handle: J403; standard 4-wire interface; supports main MIC and handset functions

●

Speaker: J401; CLASS-D,

4Ω, 2W

4.7.1 Loudspeaker Interface

SIM8905 EVB provides one loudspeaker interface. The following figure shows a reference circuit design for loudspeaker interface.

Close to speaker

10pF 33pF

33pF

ESD

10pF

SPK_P

10pF 33pF

10pF 33pF

SPK_N

Module

10pF 33pF

10pF 33pF

Route as differential pair

& shielded by GND

Figure 29: Reference Design for Loudspeaker Interface

4.7.2 Headset Interface

The following figure shows a reference circuit design for headset interface.

ESD www.simcom.com 38 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 30: Reference Design for Headset Interface

The following figure shows the pin assignment of headset interface.

1

2

3

4

5

Figure 31: Pin Assignment of Headset Interface

The following table shows the pin definition of headset interface.

Table 9: Pin Definition of Headset Interface

Pin No. Pin Name Function

MIC2P

GND

HPH_R

DET

HPH_L

Microphone input

Dedicated GND for audio of headset

Headset right channel

Headset detection

Headset left channel www.simcom.com 39 / 56

SIM8905-EVB Kit_User Guide_V1.02

6 NC Not Connected

The order of Headset interface on EVB is as following:

Figure 32: The order of Headset interface

When the headset is inserted, there will be an interrupt to the module which can make the module enter the headset mode. The handset is often used for some audio test.

In the hands-free mode, the MIC used is the handset MIC, which is switched to the EVB speaker.

4.7.3 Handle

Earphone Interface

SIM8905 EVB provides one earphone interface. The following figure shows a reference circuit design for earphone interface.

Close to earpiece

10pF 33pF

10pF 33pF

ESD

EAR_P

10pF 33pF

10pF 33pF

EAR_M

10pF 33pF

10pF 33pF

ESD

Module

Route as differential pair

& shielded by GND

Figure 33: Reference Design for Earphone Interface

Microphone Interfaces

SIM8905 EVB provides one differential microphone inputs for microphone interfaces. The differential microphone input is for ECM-Type microphone. The following figures show a reference circuit design for microphone interfaces. www.simcom.com 40 / 56

SIM8905-EVB Kit_User Guide_V1.02

Module

MIC1P

10pF

0R route as differenctial

0R

10pF

GND_MIC

10pF

Close to micphone

33pF TVS

33pF

33pF TVS 0R

EMC

Figure 34: EMC microphone reference circuit

Figure 35: Handle Interface

Table 10: Pin Definition of Handle Interface

Pin No. Pin Name Function

1

2

3

MIC_GND

EAR_N

EAR_P

Dedicated GND for audio

Earpiece output, negative

Earpiece output, positive

4 MIC1P Microphone input

NOTE

1.Internal MIC_BIAS pull-up is used to reduce BOM cost and PCB routing.

2.Single-ended capless input is the only supported configuration, but differential routing is recommended. www.simcom.com 41 / 56

SIM8905-EVB Kit_User Guide_V1.02

4.8 USIM Interfaces

The SIM8905 EVB provides two USIM card (2.95V or 1.8V) connectors J601 (USIM1 card connector) and

J602 (USIM2 card connector). The following figure shows the reference Design.

Module

LDO5_1V8

USIM_VDD

USIM_RST

SUIM_CLK

USIM_DET

USIM_DAT

470K

22R

22R

22R

USIM Card

VCC

RST

CLK

DET

GND

VPP

I/O

COM

220nF 22pF TVS

C<30pF

Figure 36: Reference Design for USIM Card Interface

The following figure shows the pin assignment of USIM1 card connector (J601).

C1

C2

C3

C5

C6

C7

CD1

Figure 37: Pin Assignment of USIM1 Card Connector

Table 11: Pin Definition of USIM Card Connector

Pin No. Pin Name Function

USIM_VDD

USIM_RST

USIM_CLK

GND

VPP

USIM_DATA

GND

USIM card power supply

USIM card reset signal

USIM card clock signal

Ground

Not connected

USIM data line, Bi-directional

Ground www.simcom.com 42 / 56

SIM8905-EVB Kit_User Guide_V1.02

CD2

USIM_DET USIM card detection

4.9 UART Interfaces

The SIM8905-EVB supports 2 UART interface, J605 and J606. There is a level shifter U603 on the EVB, it converts the 1.8V digital voltage of the module to 3V, then it is converted to RS232 through U601. UART1

(J605) supports hardware flow control and the pins are pin34~pin37. UART2(J606) is a 3-line UART interface and does not support hardware flow control, the pins are Pin93 and Pin94. The Schematic of the

UART is as following:

Figure 38: Reference Design for Uart Interface

The following figure shows the pin assignment of UART port (J605/J606) . www.simcom.com 43 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 39: Pin Assignment of UART Port (Bottom View)

Table 12: Pin Definition of UART Port

Pin No. Pin Name

I/O

Description

4

5

6

7

8

9

4

5

6

7

1

2

3

J606 (DEBUG Interface)

RS232_TXD2

RS232_RXD2

8

9

J605

1

2

3

GND

RS232_TXD1

RS232_RXD1

GND

RS232_CTS1

RS232_RTS1

I

O

I

O

I

O RS232 Transmit data

RS232 Receive data

Ground

RS232 Transmit data

RS232 Receive data

Ground

Clear To Send

Require To Send www.simcom.com 44 / 56

SIM8905-EVB Kit_User Guide_V1.02

4.10 SD Card Interface

SIM8905 EVB provides an SD card interface J603 for customers to test the module’s SD card interface.

The following figure shows the simplified interface schematic for SD card interface on SIM8905 EVB.

SD_LDO12

Module

1uF

SD_DATA2

SD_DATA3

SD_CMD

SD_LDO11

SD_CLK

SD_DATA0

SD_DATA1

33R is required for high-speed operation; placed close to the module

33R

LDO5_1V8

1M

SD_DET

1uF 33pF

NM ： Not Mounting

Reserved

TVS

C<15pF

Placed close to SD card

SD Card

1 DAT2

2 DAT3

3 CMD

4 VDD

5 CLK

6 VSS

7 DAT0

8 DAT1

11 GND

12 GND

13 GND

14 GND

9 DET_SW

10 COMMON

Figure 40: SD card reference circuit

NOTE

1

、

SDC signal cannot be pulled up to SD_LDO11

4.11 Sensors

SIM8905 EVB provides two sensors for testing purpose, as shown in the figure below

Figure 41: Sensors www.simcom.com 45 / 56

SIM8905-EVB Kit_User Guide_V1.02

4.12 Vibrator

SIM8905 EVB provides a vibrator for customers to test the motor driver interface of Smart module. The following figures show a reference circuit design and the vibrator on the board.

VBAT

Module

1uF

Vibrator

VIB_DRV_N

0R

Figure 42: Vibrator reference circuit

4.13 Buttons

here is no dedicated keypad interface in SIM8905, customers could use the GPIO (with interrupt feature) of

SIM8905 to simulate one. In the Schematic of SIM8905-EVB, GPIO16\17 are used as +\- control of volume, if customers need more keypad, they should use an extend keypad component through IIC interface.

There are 12 keypads connected with an SN7326 IC on the EVB, they are used to simulate standard number keypad (0~9 、 * 、 #) . Other keypads (+\-, POWERKEY, RESET) are dedicated and cannot be used by customer.

There are 16 keypads total on the EVB board, their locations are as in the following figure:

Figure 43: Buttons www.simcom.com 46 / 56

SIM8905-EVB Kit_User Guide_V1.02

Press PWRKEY and VOL + / VOL- in combination to have specific functions, as shown in the table below

Table 13: PWRKEY / VOL + / VOL key combination

PIN NO.

PWRKEY VOL+ VOL- Function

Key combination before starting

Y

Y

Y

N

Y

Y

Enter forced download mode

Enter engineering mode

After the customer connects the power supply and the module correctly, press the power button until the screen displays normally, then release the button to start the computer normally

4.14 Status Indication LEDs

There is a status indication light (LDE101) for signal indication on SIM8905 EVB, The LED is used to indicated the power on or power off,shown as below.

Figure 44: Status Indication LED

4.15 Forced USB BOOT Interface

FORCED_USB_BOOT is the emergency download interface. FORCED_USB_BOOT is pulled up to

LDO5_1P8, and the module can enter the emergency download mode. Used when the product does not start properly. To facilitate subsequent software upgrades and debugging, please reserve test points.

Table 14: FORCED USB BOOT definitions

Pin Name

FORCED_USB_BOOT

I/O

DI

Description

USB forced download signal, short-circuit to

LDO5_1P8 at power-on to enter forced download mode.

Note

www.simcom.com 47 / 56

LDO5 _1P8

LDO5_1P8

10K

PO

SIM8905-EVB Kit_User Guide_V1.02

1.8V power supply of GPIO port, normally open, voltage is not adjustable

FORCED_USB_BOOT

Module

Figure 45: Emergency download reference circuit

Figure 46: Emergency download www.simcom.com 48 / 56

SIM8905-EVB Kit_User Guide_V1.02

5. Operation Procedures Illustration

This chapter introduces how to use the SIM8905 EVB for testing and evaluating SIM8905 module.

5.1 Power ON Smart Modules

The following are the procedures for powering on the smart module.

1. Connect the TE board to the connectors (J801 and J802) on SIM8905 EVB.

2. If use the battery, install a Li-polymer battery on J103

；

If use 5.0V DC power supply, then switch S101 to

VBAT side.

3. Switch S101 to VBAT side or the battery is used, and then LED101 will be lighted.

4. Press S701 (PWRKEY) for at least 2s to turn on the module. When the following interface is displayed on the utilized LCD, it means the booting has been completed. www.simcom.com 49 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 47: LCD Display Indicating Module’s Power-on

NOTE

Inserting USB cable into USB interface after power supply is provided can also turn on the module

5.2 Communication Via USB or UART Interface

5.2.1 Communication via USB Interface

1. Power on the module according to the procedures mentioned in Chapter 5.1.

2. Connect SIM8905 EVB and the PC with USB cable through USB interface and install the USB driver and

ADB driver. The USB port numbers can be viewed through the PC’s Device Manager, shown as below.

Figure 48: USB COM Ports

3. Open CMD tool: “ START ”  “ ”  “ ”  “ ”.

4. Use the “ adb shell ” command to make the module enter into ADB mode. Then customers can use USB

ADB interface for test. www.simcom.com 50 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 49: “ adb shell ” Command

5.2.2 Communication via UART Interface

1. Connect the UART interface to the PC and then power on the module according to the procedures mentioned in Chapter 5.1.

2. Install the USB-to-RS232 driver. After that, the USB serial port number can be viewed through the PC

Device Manager, shown as the following figure.

Figure 50: USB Serial Port

2. SIMCom provides a serial port tool(SIMCom Serial Port Tool) for customer to test module through AT

Commands. Serial Port Tool can communicate with modules after opening COM Ports on list. On following www.simcom.com 51 / 56

figure, every section of serial tool can be seen.

SIM8905-EVB Kit_User Guide_V1.02

Figure 51: SIMCom Serial Port Tool Introduction

Also, SIMCom Serial Port Tool may take some log records and save these command list to use later again.

Tool has a 3 CMD List sections and holds AT Commands with their notes and saves under .ini format on PC to import it back.

5.3 Firmware Upgrade

SIMCOM modules upgrade firmware via USB port by default. Please follow the procedures below to upgrade firmware.

1. Install and open the firmware upgrade tool QFIL on PC and then power on the smart module according to the procedures mentioned in Chapter 5.1.

2. Click the “ SelectPort ” and select the USB port “ Qualcomm HS-USB QDLoader 9008 (COM36) ”.

3. Select “ Flat Build ” in “ Select Build Type ” option.

4. Click “ Browse ” to select the firmware which needs to be upgraded in “ Select Programmer ” option.

5. Click “ Load XML ” to select the XML which needs to be upgraded in “ Select Build ” option.

6. Click “ Download ” to upgrade the firmware. www.simcom.com 52 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 52: Firmware Upgrade Steps

5.4 Power OFF Smart Modules

There are two methods to power off the module.

The steps for the first method are as follows:

1. Press S701 (PWRKEY) for at least 1s under the power-on state of the module, and then LCD will display a menu for selection www.simcom.com 53 / 56

SIM8905-EVB Kit_User Guide_V1.02

Figure 53: LCD Display Indicating Module’s Power-off

2. Choose “ Power off ” option.

3. The module will be powered off normally.

The other method is to press down PWRKEY for at least 8s until the module is shut down completely www.simcom.com 54 / 56

SIM8905-EVB Kit_User Guide_V1.02

6. Appendix

6.1 References

Table 14: Related Documents

SN

[1]

Document name

SIM8905_Hardware_Design

6.2 Terms and Abbreviations

Remark

SIM8905 series hardware design

Abbreviation

ALS

CMOS

ECM

SIM8905 EVB

LCM

LED

MEMS

MIPI

NC

OTG

PC

PS

PWM

UART

USB

USIM

WLED

ZIF

Table 15: Terms and Abbreviations

Description

Ambient Light Sensor

Complementary Metal Oxide Semiconductor

Electret Microphone

SIM8905 Evaluation Board

LCD Module

Light Emitting Diode

Micro-Electro-Mechanical System

Mobile Industry Processor Interface

Not Connected

On-The-Go

Personal Computer

Proximity Sensor

Pulse Width Modulation

Universal Asynchronous Receiver & Transmitter

Universal Serial Bus

(Universal) Subscriber Identity Module

White LED

Zero Insert Force www.simcom.com 55 / 56

SIM8905-EVB Kit_User Guide_V1.02

6.3 Safety Information

The following safety precautions must be observed during all phases of operation, such as usage, service or repair of any cellular terminal or mobile incorporating SIM8905 module. Manufacturers of the cellular terminal should send the following safety information to customs and operating personnel, and incorporate these guidelines into all manuals supplied with the product. If not so, SIMCom assumes no liability for customers’ failure to comply with these precautions.

Table 16: Safety Caution

Marks Requirements

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

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 to prevent interference with communication systems. Forgetting to think much of these instructions may impact the flight safety, or offend local legal action, or both.

Do not operate the cellular terminal or mobile in the presence of flammable gases or fumes. Switch off the cellular terminal when you are near petrol stations, fuel depots, chemical plants or where blasting operations are in progress. Operation of any electrical equipment in potentially explosive atmospheres 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 sets, radios, computers or other electric equipment.

Road safety comes first! Do not use a hand-held cellular terminal or mobile when 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 signals and cellular networks and cannot be guaranteed to connect in all conditions, especially with a mobile fee or an invalid SIM card. While you are in this condition and need emergent help, please remember to use emergency calls. In order to make or receive calls, 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 the cellular terminal or mobile. www.simcom.com 56 / 56