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Development Kit ManualDevelopment Kit Manual

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SIM700D-EVB User Guide

Document Title: SIM700D-EVB User Guide

Version: 1.02

Date: 2008-08-20

Status:

Document Control ID: SIM700D-EVB_UGD_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 customers possession. Furthermore, system validation of this

product designed by SIMCom within a larger electronic system remains the responsibility of

the customer or the customers system integrator. All specifications supplied herein are

subject to change.

Copyright

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 without express authority. Offenders are liable to the

payment of damages. All rights reserved in the event of grant 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.

Copyright Shanghai SIMCom Wireless Solutions Ltd. 2008

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Contents

1 Scope of the users guide ...............................................................................................................6

2 EVB kit Overview..........................................................................................................................7

2.1 Content of the kit.................................................................................................................7

2.2 General Description ............................................................................................................8

2.2.1 Block Diagram .........................................................................................................8

2.2.2 Electrical .................................................................................................................9

2.2.3 Mechanical feature..................................................................................................9

2.2.4 Basic Features .......................................................................................................10

3 SIM700D Interface .................................................................................................................11

3.1 Pin description...................................................................................................................12

4 Accessory Interface.................................................................................................................15

4.1 Power Interface .................................................................................................................15

4.1.1 Power Supply .........................................................................................................15

4.1.2 Charging interface ..................................................................................................16

4.2 Audio Interface .................................................................................................................17

4.2.1 Audio Overview.....................................................................................................17

4.2.2 Audio interface1.....................................................................................................17

4.2.3 Audio Interface2.....................................................................................................18

4.3 SIM card interface.............................................................................................................20

4.4 RF Interface.......................................................................................................................20

4.5 RS232 Interface.................................................................................................................21

4.5.1 Main RS232 Interface ............................................................................................22

4.5.2 Debug RS232 Interface ..........................................................................................22

4.6 USB Interface....................................................................................................................23

4.7 Service lights and switches ...............................................................................................24

4.7.1 Service lights..........................................................................................................24

4.7.2 Switches .................................................................................................................24

4.7.2.1 PWRKEY switch.........................................................................................25

4.7.2.2 VBAT switch...............................................................................................25

4.7.2.3 Download switch.........................................................................................25

5 Test Interface................................................................................................................................26

5.1 X204---UART Interface ....................................................................................................26

5.2 X206--- CTRL signal ........................................................................................................27

5.3 X207..................................................................................................................................28

6 Illustration....................................................................................................................................30

6.1 Turning on.........................................................................................................................30

6.2 Connecting Net and calling...............................................................................................30

6.3 Turning off ........................................................................................................................30

6.4 Service and firmware update.............................................................................................31

7 Safety precautions........................................................................................................................34

8 Acronyms and Abbreviations.......................................................................................................35

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List of Figures

FIGURE 1CONTENT OF THE KIT ..............................................................................................................7

FIGURE 2BLOCK DIAGRAM ...................................................................................................................8

FIGURE 3EVBINTERFACE PLACEMENT ...............................................................................................10

FIGURE 4SIM700D-DTE........................................................... ......................................................... 11

FIGURE 5SIM700D-DTESOLDERED WITH SIM700DMODULE ....................................................... .... 11

FIGURE 6POWER JACK.........................................................................................................................15

FIGURE 7: POWER PLUG ........................................................................................................................16

FIGURE 8: POWER TEST-POINT INTERFACE.............................................................................................16

FIGURE 9: AUDIO INTERFACE ................................................................................................................17

FIGURE 10: HANDSET INTERFACE..........................................................................................................18

FIGURE 11: AUDIO INTERFACE2 ............................................................. ............................................... 19

FIGURE 12: EARPHONE INTERFACE .......................................................................................................19

FIGURE 13: SIMCARD HOLDER.............................................................................................................20

FIGURE 14:RS232INTERFACE ................................................................................................................21

FIGURE 15:MAIN INTERFACE...................................................................................................................22

FIGURE 16:USBINTERFACE....................................................................................................................23

FIGURE 17: ALL TEST INTERFACE..........................................................................................................26

FIGURE 18:X204INTERFACE ..................................................................................................................26



FIGURE 21:SIM700DDOWNLOAD TOOL CONFIGURE1DOWNLOAD.................................................31

FIGURE 22:SIM700DDOWNLOAD TOOL CONFIGURE2PROFILE .....................................................32

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List of Table

TABLE 1:CONTENT OF THE KIT..................................................................................................................7

TABLE 2:EVBMODULE INTERFACE .......................................................................................................12

TABLE 3:HANDSET INTERFACE...............................................................................................................18

TABLE 4:EARPHONE INTERFACE .............................................................................................................19

TABLE 5:MAIN RS232INTERFACE PIN DESCRIPTION...............................................................................22

TABLE 6:DEBUG RS232INTERFACE PIN DESCRIPTION ............................................................................23

TABLE 7:USBINTERFACE PIN DESCRIPTION............................................................................................23

TABLE 8:WORKING STATE OF SERVICE LIGHTS ........................................................................................24

TABLE 9:RS232INTERFACE PIN LIST .....................................................................................................27

TABLE 10:X206INTERFACE PIN LIST .....................................................................................................28

TABLE 11:X207INTERFACE PIN LIST......................................................................................................29

TABLE 12:SWITCH SETTING ...................................................................................................................30

TABLE 13:SWITCH SETTING FOR DOWNLOAD .........................................................................................32

TABLE 14:ACRONYMS AND ABBREVIATIONS ...........................................................................................35

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1 Scope of the users guideThis document gives the usage of SIM700D-EVB. User can get useful info about the

SIM700D-EVB quickly through this document.

This document is subject to change without notice at any time.

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2 EVB kit Overview2.1 Content of the kitWe provide the development equipments as following table, please check out the content of your

SIM700D-EVBkit. If any of the items are missing, please contact your supplier.

Figure 1Content of the kitTable 1: Content of the kit

Part NO. Description Quantity

1 3-Pins headset 1

2 AC adapter 1

3 SIM700D-EVB 1

4 RF cable 1

5 Car carried antenna 1

6 USB cable 1

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2.2 General DescriptionSIMCom supplies the SIM700D kitto assist the designer, during the developing project phase, to

develop your applications based on SIM700D.

The SIM700Dkit provides a fully functional solution for a complete data/phone application. We

assume you have to provide are:

1) A personal computer;

2) A SIM card with a valid network subscription;

3) Knowledge of AT commands programming;

4) A power supply.

2.2.1 Block DiagramThe SIM700D-EVB can be split into several functional blocks depending on the implemented

function; the following drawings show a block diagram and the displacement of the main blocks

on the kit.

Figure 2Block DiagramAs you see, you can use this development kit for audio or some data applications. There are

following features in our kit:

Quad-band GSM/GPRS/EDGE (850, 900, 1800, 1900 MHz)

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Class 4 (2W at 850/900MHz)

Class 1 (1W at 1800/1900 MHz)

Small size and low power consumption

Voice, SMS

Fax and data transmission

Internal 3V/1.8V SIM interface

USB interface

Easy remote control by AT commands for dedicated applications

2.2.2 Electrical Power supply: 5-7 V DC +/- 5% 2A

2.2.3 Mechanical feature Length: 131 mm

Width: 85 mm

Height: 25 mm

Weight: 70.6 g (without any interface)

Operating temperature range: -20C to + 60C

Storage temperature: -40C to +85C

The following figure shows the interface placement of the EVB:

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Figure 3EVB interface placement

2.2.4 Basic FeaturesYou can use any features as following chapter in your development or on the SIM700D kit.

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3 SIM700D InterfaceSIM700D can't be directly connected to SIM700D-EVB. A SIM700D-DTE is used as a bridge

for the connection between SIM700D and SIM700D-EVB.

Figure 4SIM700D-DTE

Figure 5SIM700D-DTE soldered with SIM700D modulePlease ensure your connection in a right orientationotherwise SIM700D module might be

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destroyed.

3.1 Pin descriptionThe connection between SIM700D-EVB and SIM700D-DTE is made through two 80-pins

connectors. The pin function is listed in the following table.

Table 2: EVB Module Interface

PIN NO. PIN NAME Module

attribute

Function

72,74,76,7

8,80VBAT I SIM700D Power supply

1,2,7,41,7

1,73,75,77

,79

GND Ground

4 ADC0 I General purpose analog to digital converter.

6 STATUS O

Indicating the modules ON/OFF state. High state of

the STATUS indicates the modules ON state; Low

state of the STATUS indicates the modules OFF

state

8 BT_TXD O Blue tooth transmit data

10 BT_RXD I Blue tooth receive data

12 BT_EN O Enable blue tooth function

16 GPIO1 O General Purpose Output Port 1

23 VBUS_IN I VBUS voltage input provided by USB host

24 USB_DP I/O USB positive signal

25 JACKSENSE I Indication for earphone inserted

26 USB_DN I/O USB negative signal

29 WAKEUP I Wakeup the module into active mode

30 AGND Analog ground

31 SIM_CLK O Clock output from module to SIM card

32 SPK2N O SIM700D Audio2 output-

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PIN NO. PIN NAME Module Function

attribute

33 SIM_VDD O Voltage supply for SIM card

34 SPK2P O SIM700D Audio2 output+

35 SIM_DATA I/O Data output/input from SIM700D to SIM

36 SPK1P O SIM700D Audio1 output+

37 SIM_RST O Reset output from SIM700D to SIM card

38 SPK1N O SIM700D Audio1 output-

40 MIC2N I SIM700D Microphone2 input-

42 MIC2P I SIM700D Microphone2 input+

43 DISP_RST O LCD reset

44 MIC1P I SIM700D Microphone1 input+

45 DISP_CLK O SIM700D display clock for LCD

46 MIC1N I SIM700D Microphone1 input-

47 DISP_CS O SIM700D display enable

49 DISP_DATA O SIM700D display data output

50 PWRKEY I System power on key

51 DISP_ D/C O SIM700D display data or command select

53 TEMP_BAT ITEMP_BATT is used for measuring the battery

temperature

54 DCD O Data carrier detection

55 NETLIGHT O Network state indication

57 DBG_RXD I SIM700D software debug information input

58 CTS O Clear to send

59 RXD I Receive data

61 DBG_TXD O SIM700D software debug information output

62 DTR I Data terminal ready

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PIN NO. PIN NAME Module Function

attribute

63 TXD O Transmit data

64 RTS I Request to send

65VRT I/O

SIM700D backup battery charge power output or

RTC power in

67VCHG I

Voltage input for the charge circuit, as the signal for

detecting the charger insertion

68 RI O Ring indicator

70 VDD_EXT O SIM700D supply 2.8V voltage for external circuit

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4 Accessory InterfaceThis chapter describes the hardware interfaces:

Interfaces on the 80-pins general purpose connector

Power interface

Charging interface

Audio interfaces

SIM card interface

RF interface

RS232 interfaces

USB interface

Service lights and switches

4.1 Power InterfaceThe SIM700D-EVBcould be powered by different external sources, only one at the same time.The requested setting is made inserting the proper connectors in the right position as described in

the following paragraphs.

4.1.1 Power SupplyConnect apower supplyto X401 respecting the polarization.

v

Figure 6Power jackYou must select a right power plug. The following figure shows the configuration of the power

plug.

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SIM700D-EVB_UGD _V1.02 16 20.08.2008

Figure 7: Power plug

4.1.2 Charging interfaceSIM700D has integrated a charging circuit into the module for Li-Ion battery charging control. In

order to use charging function, please connect VBAT test-point to your Li-Ion battery positive

poleconnect GND test-point to your Li-Ion battery negative pole, and connect VCHG test-point

to your charging power supply. Please refer to the following figure

Figure 8: Power test-point interface

Warning: The VBAT test-point is connected with SIM700D module directly, please ensure your

power supply does not exceed 4.5V. If you want to use RS232 UART in this case, you must

switch S402 to ON state.

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4.2 Audio Interface

4.2.1 Audio OverviewSIM700D-EVB provides two analog input channels, Microphone 1 input and Microphone 2

input, that may be used for both microphone and line input. The Microphone 1 input channel is

differential, but Microphone 2 input channel issingle-ended. Usually one of the two channels is

typically used with a microphone built into a handset. The other channel is typically used with a

microphone built into a earphone or external line input. The SIM700D-EVB analog input

configuration is determined by AT COMMAND. The connection can be either differential or

single-ended, but using a differential connection in order to reject common mode noise and

TDMA noise is recommended.

Figure 9: Audio interface

4.2.2 Audio interface1Both Microphone1 inputs and Audio 1 outputs are differential signals:

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Figure 10: Handsetinterface

You should insert your headset into X303. Pin function is listed in the following table.

Table 3 : Handset interface

Pin Signal I/O Description

1 MIC1P I Microphone input +

2 SPK1P O Speaker output +

3 SPK1N O Speaker output -

4 MIC1N I Microphone input -

4.2.3 Audio Interface2In SIM700D-EVB audio interface2 are designed as single-ended.

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SIM700D-EVB_UGD _V1.02 19 20.08.2008

Figure 11: Audio interface2

You should insert your earphone into X302, Pin function is listed in the following table.

Figure 12: Earphone interface

Table 4: Earphone interface


1 SPK2P O speak output+

4 MIC2P I microphone input +

2,3 GND Ground

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4.3 SIM card interfaceThe SIM700D-EVB contains a dedicated smart card interface, conforming to the ISO/IEC7816-3

(Identification Card) standard but only supporting the subset required for GSM phase 2+operation.This interface is fully compliant with GSM 11.11 recommendations concerning the

SIM functionality.

The SIM interface is available through the 80 pins connector connected to a stand-alone SIM

card holder.

Figure 13: SIM card holder

Notes: This interface is compatible 3V and 1.8V on the SIM700D-EVB, it can be recognize

automatically by software. 5V SIM card can be driven with production unit using an external

level shifter.

The SIM Interface module functions as an asynchronous serial communications port. It is half

duplex and therefore allows sharing of hardware between receive and transmit modes. The

interface is symmetric, with the same timing for transmit and receive.

4.4 RF Interface

The SIM700D-DTE has been equiped with an Antenna PAD and a ultra-miniature SMT GSC

type RF connector(the vendor Part Number:MM9329-2700B) so that the customers can complete

the antenna installation easily and alternatively.

Install antenna via the SIM700D Antenna PAD.---The customer can connect its antenna via a microwave coaxial cable which one terminal

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is SMA type and the other is opened. The SMA type terminal is connected with customers

antenna, and the opened terminal is soldered on the modules antenna PAD(the woven outer

conductor is soldered on the GND PAD which near the Antenna PAD, and the inner

conductor is soldered on the Antenna PAD).

---If the customers antenna equiped with a spring contactor, the antenna can be attached on

the Antenna PAD via a spring contactor directly.

Install antenna via the ultra-miniature RF connector.

The customer can connect its antenna via a MXTK series microwave coaxial cable which

vended by Murata. The SMA type terminal of the coaxial cable is connected with customers

antenna, and the other terminal can be connected with the modules ultra-miniature RF

connector directly.

4.5 RS232 Interface

RS232 interface is available complying with 2.93 Volts interface. The signals are Tx data (TXD),

Rx data (RXD), Request To Send (RTS), Clear To Send (CTS), Data Terminal Ready (DTR). The

set of RS232 signals can be required for GSM DATA services application. Two additional signals

are Data Carrier Detect (DCD) and Ring Indicator (RI).

Communication between your application and the SIM700D is allowed connecting the DTE to

the Asynchronous Serial Interfaces of Base-Band Chip, X101 and X102, through the standard

RS232 communications port (double 9way D-socket connector at slow data rates of RS232

protocol)

Figure 14: RS232 interface

X102 can be used as a control interface ,data communication or firmware upgrade.

X101 is a debug 3-wires uart interface, it has to be used as debug function only.

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4.5.1 Main RS232 Interface

Communications between your application and the SIM700D-EVB are allowed use a 9 pins

female D-socket connector.

Figure 15: main interface

Pin function is listed in the following tables.

Table 5: Main RS232 interface pin description





4 DTR I Data Terminal Ready

5 GND GND

6 DSR O Data Set Ready

7 RTS I Request to Send

8 CTS O Clear to Send

9 RI O Ring Indicator

Not all signals will be used in your application. You may select part of the signals in your design.

If you want to use SIM700D module as a modem, you need all signals.

4.5.2 Debug RS232 Interface

The Debug RS232 Interface uses the same connector as Main RS232 Interface.Please refer to

Figure18

Pin function is listed in the following tables.

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Table 6: Debug RS232 interface pin description


2 DBG_TXD O Transmit data

3 DBG_RXD I Receive data

5 GND GND

This port is only used as debug port.

4.6 USB Interface

SIM700D supports an USB 2.0 Full Speed (12Mbit/s) device interface. It is primarily used as

command and data interface and downloading firmware.

SIM700D-EVB contains a B type mini-USB socket. Please refer the following figure.

Figure 16: USB interface

Table 7: USB interface pin description


1VBUS_IN I

VBUS voltage input provided by USB

host

2 USB_DN I/O USB negative signal

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3 USB_DP I/O USB positive signal

4,5 GND Ground

When a Li-Ion Battery pack is connected to the VBAT/GND test-point on the SIM700D-EVB,

you can charge the battery through the VBUS_IN pin powered by USB host.

4.7 Service lights and switches

SIM700D-EVB contains three service lights and three switches.Operating Service lights is used

for the indication of SIM700D&SIM700-EVB working status. Switches are used to set

SIM700D module to a special status by user.

4.7.1 Service lights

There are three sevice lights used for the indication of SIM700D&SIM700-EVB working status.

Table 8: Working state of service lights

State Module function

HL301 (POWER)

OFF SIM700D-EVB is not powered

ON SIM700D-EVB is powered

HL202 (STATUS)

OFF SIM700D is turned off

ON SIM700D is turned on

HL201 (NET_LIGHT)

Off SIM700D is not running

64ms On/ 800ms Off SIM700D does not find the network

64ms On/ 3000ms Off SIM700D find the network

64ms On/ 300ms Off GPRS/EDGE communications

4.7.2 Switches

There are five switches used to set SIM700D to a special status.

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4.7.2.1 PWRKEY switch

S202 is a push button switch used to turn on/off the SIM700D. When S202 is pressed, the

PWRKEY signal of SIM700D is drawn to ground. The level of the voltage of this signal has to

be maintained to low during a minimum time of 1 second.

4.7.2.2 VBAT switch

S402 is used to switch ON or OFF the SIM700D modem VBAT power supply. You must select

this switch to ON to get power supply.

4.7.2.3 Download switch

If you want to upgrade the firmware of the SIM700D module, S201 will be used. Please refer to

Chapter6 for more detail.

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5 Test Interface

SIM700D-EVB convert the module connection technology (BGA soldering) into a test pinconnector .The part of the basic interfaces is served by the SIM700D-EVB, whereas specific

interfaces according to the type of the module (antenna, general purpose inputs/outputs GPIO,

ADC, UART, DISP, Blue tooth, SIM card, etc) are available on the SIM700D-EVB to connect it

to the user applications extension boards, measurements equipment or other tools.

Notes: not all function of the module was connected to this EVB.

Figure 17: All Test interface

5.1 X204---UART Interface

These test port are not contain any level shifter, it was designed a 2.93V interface on SIM700D,

can be used to communicate with MCU immediately. But you must check electric compatibility

between SIM700D and MCU. Please refer to SIM700D_HD.

Figure 18: X204 Interface

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Table 9: RS232 Interface Pin List


1,9,14 NC Not connected


3 GND Ground


5 RTS I Request to send

6 CTS O Clear to send


8 DBG_TXD O Transmit data

10 DBG_RXD I Receive data

11 RI O Ring indicator

12 DTR I Data terminal ready

13 PWRKEY I System power on key

5.2 X206--- CTRL signal


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Table 10: X206 Interface Pin List


1 VBUS_IN I VBUS voltage input provided by USBhost

2 GPIO1 O General Purpose Output Port 1

3 GND Ground

4,5,6,8 NC Not connected

7 BT_RXD I Blue tooth receive data

9 BT_TXD O Blue tooth transmit data

10 WAKEUP I Wakeup the module into active mode

11 BT_EN O Enable blue tooth function

12 STATUS O Indicating the modules ON/OFF state.

13 JACKSENSE I Indication for earphone inserted

14 VRTC I/OSIM700D backup battery charge power

output or RTC power in

15 NETLIGHT O Network state indication

16 ADC0 IGeneral purpose analog to digital

converter.

5.3 X207


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Table 11: X207 Interface Pin List


1 SIM_CLK O Clock output from module to SIM card

2,4 NC Not connected

3 SIM_DATA I/OOutput and input from module to SIM

Data

5 SIM_RST O Reset output from module to SIM card

6 SIM_VDD O Voltage Supply for SIM card

7 DISP_CLK O SIM700D display clock for LCD

8 DISP_RST O LCD reset

9 DISP_DATA O SIM700D display data output

10 DISP_CS O SIM700D display enable

11 TEMP_BAT ITEMP_BATT is used for measuring the

battery temperature

12 DISP_ D/C OSIM700D display data or command

select

13 GND ground

14 VDD_EXT OSIM700D supply 2.8V voltage for

external circuit

15 VCHG I

Voltage input for the charge circuit, as

the signal for detecting the charger

insertion

16 VBAT I SIM700D Power supply

Serial Interface Display devices, such as those from Seiko-Epson, Hitachi and Motorola (SPI)

style interfaces can be supported by the SIM300S. If you want use this feature, please contact us

to get technologic support. Normally, release firmware cannot support LCD.

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6 Illustration

6.1 Turning on

(1) Connect the SIM700D-DTE soldered with SIM700D module to the 80 pins connector onSIM700D-EVB, inserting 5V AC adapter. The switch setting is show in the following table.

Table 12 : Switch setting

Switch Status

S402 ON

S201 OFF

(2) Press the PWRKEY button for about 1.5 seconds, then SIM700D module begins running.You can use the AT COMMAND to communicate with SIM700D module.

You can see HL201 on the EVB flashing at a certain frequency. By the state, you can judge the

working status of SIM700D. No function and test can be executed when we have not connected

necessary accessories.

6.2 Connecting Net and calling

(1) Install the USB driver on your PC.

(2) Connect the USB cable to the SIM700D-EVB USB interface J1.

(3) Open the HyperTerminal (AT command windows) on your Personal computer, the location of

the HyperTerminal in windows is STARTaccessorycommunicationHyperTerminal. Set

correct Baud Rate and COM number. The Baud Rate of SIM700D is 460800bps.

(4) Connect the antenna to the SIM700D-DTE using an antenna transmit line, insert SIM card

into the SIM card interface, insert headphones or headset into the audio interface.

(5) Act on the steps of turning on which is mentioned in chapter 6.1.

6.3 Turning off

Turn off SIM700D module: press the PWRKEY for about 1.5 seconds, SIM700D module will be

turned off.

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6.4 Service and firmware update

SIM700D firmware can be updated through the USB interface.The firmware updating can be

done with a specific software tool provided by SIMCom. Please follow the following steps ofupdating.

(1) Install the download tool and USB driver on your PC. Set your download tool configure as

following:

Figure 21: SIM700D download tool configure1Download

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Figure 22: SIM700D download tool configure2 Profile

Warning: Dont select Full Chip Erase, this operation will erase all of the configure information

on your module.

Profile: Lemans65-USB-NOR

Endpoints: 1.

Absolute Address: 04000000

Download file: select the right firmware

(2) Click Start downloadbutton on your PC.

(3) Setting the switches of the SIM700D-EVB in the following table.Table 13 : Switch setting for download

Switch Status

S402 ON

S201 OFF

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(4) Connect the USB cable to J1, and connect the AC adapter to X401.

(5) Switch the S201 to ONstate.

(6) SIM700D start downloading

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7 Safety precautions

READ CAREFULLY

Be sure the use of this product is allowed in the country and in the environment required. The use

of this product may be dangerous and has to be avoided in the following areas:

Where, it can interfere with other electronic devices in environments such as hospitals, airports,

aircrafts, etc.

Where there is risk of explosion such as gasoline stations, oil refineries, etc

It is responsibility of the user to enforce the country regulation and the specific environment

regulation.

Do not disassemble the product; any mark of tampering will compromise the warranty validity.

We recommend following the instructions of the hardware user guides for a correct wiring of the

product. The product has to be supplied with a stabilized voltage source and the wiring has to be

conforming to the security and fire prevention regulations.

The product has to be handled with care, avoiding any contact with the pins because electrostatic

discharges may damage the product itself. Same cautions have to be taken for the SIM, checking

carefully the instruction for its use. Do not insert or remove the SIM when the product is in

power saving mode.

The system integrator is responsible of the functioning of the final product; therefore, care has to

be taken to the external components of the module, as well as of any project or installation issue,

because the risk of disturbing the GSM network or external devices or having impact on the

security. Should there be any doubt, please refer to the technical documentation and the

regulations in force.

Every module has to be equipped with a proper antenna with specific characteristics. The

antenna has to be installed with care in order to avoid any interference with other electronic

devices and has to guarantee a minimum distance from the people (20 cm). In case of this

requirement cannot be satisfied, the system integrator has to assess the final product against theSAR regulation.

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8 Acronyms and Abbreviations

Table 14: Acronyms and abbreviations

Abbreviation Description

AC Alternating Current

ADC Analog-to-Digital Converter

CTS Clear to Send

DAC Digital-to-Analog Converter

DC Direct Current

DTE Data Terminal Equipment (typically computer, terminal, printer)

DTR Data Terminal ReadyDTX Discontinuous Transmission

EDGE Enhanced Data Rate for GSM Evolution

EFR Enhanced Full Rate

EGSM Enhanced GSM

EMC Electromagnetic Compatibility

ESD Electrostatic Discharge

FR Full Rate

GPRS General Packet Radio Service

GSM Global Standard for Mobile Communications

HR Half Rate

I/O Input/Output

IC Integrated Circuit

LED Light Emitting Diode

LDO Low Dropout Linear Regulators

MCU Micro Controller Unit

PWM Pulse-Width Modulation

RS232 Recommended Standard 232

SPI Serial Peripheral Interface

USB Universal Serial Bus

Li-Ion Lithium-Ion

PCB Printed Circuit Board

PCS Personal Communication System, also referred to as GSM 1900

RF Radio Frequency

RMS Root Mean Square (value)

RTC Real Time ClockRx Receive Direction

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SIM Subscriber Identification Module

SMS Short Message Service

TDMA Time Division Multiple Access

Tx Transmit DirectionUART Universal Asynchronous Receiver & Transmitter

NC Not Connect

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Contact us:

Shanghai SIMCom Wireless Solutions Ltd

Building A

SIM Technology BuildingNo.633

Jinzhong Road

Changning District

Shanghai P.R. China 200335

Tel: +86 21 3252 3300

Fax: +86 21 3252 3301

URL: www.sim.com/wm
http://www.sim.com/wmhttp://www.sim.com/wmhttp://www.sim.com/wm

skm sim700d

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