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Summary of Contents for SimCom SIM802 HD

  • Page 1 Hardware Design SIM802_HD_V2.01...
  • Page 2 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.
  • Page 3: Table Of Contents

    SIM802 Hardware Design Contents Contents ............................3 Version history..........................8 1 Introduction........................... 9 1.1 Related documents ......................9 1.2 Terms and abbreviations....................10 1.3 Safety caution........................12 2 Product concept........................... 14 2.1 SIM802 key features at a glance ..................15 2.2 SIM802 functional diagram ....................
  • Page 4 SIM802 Hardware Design 3.11 SIM interface........................50 3.11.1 SIM card application ..................... 50 3.11.2 Design considerations for SIM card holder ............51 3.11.3 Design considerations for SIM card holder ............52 3.12 LCD display interface ..................... 54 3.13 General purpose input & output (GPIO) ................. 55 3.14 ADC ..........................
  • Page 5 SIM802 Hardware Design Table Index TABLE 1: RELATED DOCUMENTS....................9 TABLE 2: TERMS AND ABBREVIATIONS ..................10 TABLE 3: SIM802 KEY FEATURES....................15 TABLE 4: CODING SCHEMES AND MAXIMUM NET DATA RATES OVER AIR INTERFACE. 16 TABLE 5: PIN DESCRIPTION ......................19 TABLE 6: OVERVIEW OF OPERATING MODES................
  • Page 6 SIM802 Hardware Design Figure Index FIGURE 1: SIM802 FUNCTIONAL DIAGRAM ................17 FIGURE 2: TOP VIEW OF SIM802 EVB .................... 18 FIGURE 3: VBAT INPUT ......................... 24 FIGURE 4: REFERENCE CIRCUIT OF THE SOURCE POWER SUPPLY INPUT......25 FIGURE 5: VBAT VOLTAGE DROP DURING TRANSMIT BURST ..........25 FIGURE 6: TURN ON SIM802 USING DRIVING CIRCUIT ............
  • Page 7: Sim802_Hd_V2.01

    SIM802 Hardware Design FIGURE 44: TOP VIEW OF SIM802 ....................71 FIGURE 45: THE RAMP-SOAK-SPIKE REFLOW PROFILE OF SIM802........72 SIM802_HD_V2.01 12.01.2010...
  • Page 8: Version History

    Origin Jirang Feng Scope of the document This document is intended for the following versions of the SIMCom modules •SIM802-A: GSM/GPRS 900/1800 MHz and 850/1900MHz, SRD RF 433MHz Version SIM802-B: GSM/GPRS 900/1800 MHz and 850/1900MHz, SRD RF 868MHz Version SIM802-C: GSM/GPRS 900/1800 MHz and 850/1900MHz, SRD RF 915MHz Version SIM802_HD_V2.01...
  • Page 9: Introduction

    SIM802 Hardware Design 1 Introduction This document describes the hardware interface of the SIMCom SIM802 module that connects to the specific application and the air interface. As SIM802 can be integrated with a wide range of applications, all functional components of SIM802 are described in great detail.
  • Page 10: Terms And Abbreviations

    SIM802 Hardware Design 1.2 Terms and abbreviations Table 2: Terms and abbreviations Abbreviation Description Analog-to-Digital Converter Adaptive Multi-Rate Antenna Reference Point ASIC Application Specific Integrated Circuit Bit Error Rate Base Transceiver Station CHAP Challenge Handshake Authentication Protocol Coding Scheme Circuit Switched Data Clear to Send Digital-to-Analog Converter Discontinuous Reception...
  • Page 11 SIM802 Hardware Design kbps Kilo bits per second Light Emitting Diode Li-Ion Lithium-Ion Mobile Originated Mobile Station (GSM engine), also referred to as TE Mobile Terminated Password Authentication Protocol PBCCH Packet Switched Broadcast Control Channel Printed Circuit Board Personal Communication System, also referred to as GSM 1900 Protocol Data Unit Point-to-point protocol Radio Frequency...
  • Page 12: Safety Caution

    If not so, SIMCom does not take on any liability for customer failure to comply with these precautions. When in a hospital or other health care facility, observe the restrictions about the use of mobiles.
  • Page 13 SIM802 Hardware Design 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.
  • Page 14: Product Concept

    SIM802 Hardware Design 2 Product concept Designed for global market, SIM802 module is a complete Quad-Band GSM/GPRS solution that is also equipped with SRD RF technology and embedded SIM card IC (optional).The GSM/GPRS engine works on frequencies GSM/GPRS 900/1800 MHz and 850/1900MHz, SIM802 series features GPRS multi-slot class 10/Class 8 (the default is class 10) capability and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4.
  • Page 15: Sim802 Key Features At A Glance

    SIM802 Hardware Design 2.1 SIM802 key features at a glance Table 3: SIM802 key features Feature Implementation Power supply Single supply voltage 3.4V – 4.5V Power saving Typical power consumption in SLEEP mode to 6mA ( BS-PA-MFRMS=5 ) Charging Supports charging control for Li-Ion battery GSM frequency Bands SIM802 quad-band: GSM/GPRS 900/1800 MHz and 850/1900MHz.
  • Page 16: Table 4: Coding Schemes And Maximum Net Data Rates Over Air Interface

    SIM802 Hardware Design Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80) Adaptive multi rate (AMR) Echo Cancellation Serial interface and Serial Port: Seven lines on Serial Port Interface Debug interface Serial Port can be used for CSD FAX, GPRS service and sending AT command of controlling module.
  • Page 17: Sim802 Functional Diagram

    SIM802 Hardware Design 2.2 SIM802 functional diagram The following figure shows a functional diagram of the SIM802 and illustrates the mainly functional part: The GSM baseband engine Flash and SRAM The GSM radio frequency part The GSM antenna interface The SRD radio frequency part The SRD RF antenna interface The embedded SIM card IC (optional) The other external interfaces...
  • Page 18: Sim802 Evaluation Board

    SIM802 Hardware Design 2.3 SIM802 evaluation board In order to help you on the application of SIM802, SIMCom can supply an Evaluation Board (EVB) that interfaces the SIM802 directly with appropriate power supply, SIM card holder, the main serial port and debug serial port, handset port, LCD (optional), antenna and all GPIO of the SIM802.
  • Page 19: Application Interface

    SIM802 Hardware Design 3 Application interface All hardware interfaces are described in detail in following chapters: Power supply and charging control (see Chapters 3.3 and 3.5) Provide main serial interface and debug serial interface (see chapter3.9) Two analog audio interfaces (see chapter 3.10) SIM interface (see chapter 3.11) LCD interface (see chapter 3.12) GPIO interface (see chapter 3.13)
  • Page 20 SIM802 Hardware Design the system. Vnorm=1.8V connected Current output for backup = 20uA battery out(max) battery when the main =5 uA capacitor. battery is present and the backup battery is in low voltage state. VCHG Voltage input for the charge Vmax=5.25V If unused keep pin circuit, as the signal for...
  • Page 21 SIM802 Hardware Design Pin name Description DC characteristics Comment STATUS Indicate work status VOLmin=GND unused keep VOLmax=0.2V pins open VOHmin= 2.93V-0.2 VOHmax= 2.93V GPIO General Input Output Port DISP_DAT Display interface unused keep pins open DISP _CLK DISP _CS DISP _D/C DISP _RST KBR0 Pull up inside, if...
  • Page 22 SIM802 Hardware Design diode array. VIHmax= SIM_VDD+0.3 VOLmin=GND VOLmax=0.2V VOHmin= SIM_VDD-0.2 VOHmax= SIM_VDD Pin Name Description DC characteristics Comment ADC0 General purpose analog to Input voltage value unused keep digital converter. scope 0V to 2.4V pins open TEMP_BA Measure battery temperature SRD interface Pin name...
  • Page 23: Operating Modes

    SIM802 Hardware Design 3.2 Operating modes The table below briefly summarizes the various operating modes referred to in the following chapters. Table 6: Overview of operating modes Mode Function GSM/GPRS Module will automatically go into SLEEP mode if DTR is set to high SLEEP level and there is no on air or audio activity is required and no hardware interrupt (such as GPIO interrupt or data on serial port).
  • Page 24: Power Supply

    SIM802 Hardware Design serial interfaces is still accessible. The power consumption in this case is very low. Alarm mode RTC alert function launches this restricted operation while the module is in POWER DOWN mode. SIM802 will not be registered to GSM network and only parts of AT commands can be available.
  • Page 25: Power Supply Pins

    SIM802 Hardware Design is drained. The following figure is the reference design of +5V input source power supply. The designed output for the power supply is 4V, thus a linear regulator can be used. If there’s a big difference between the input source and the desired output (VBAT), a switching converter power supply will be preferable because of its better efficiency especially with the 2A peak current in burst mode of the module.
  • Page 26: Minimizing Power Losses

    SIM802 Hardware Design one analog GND pins are recommended for grounding. The VCHG Pin serves as a control signal for charging a Li-Ion battery. VRTC Pin can be used to back up the RTC. 3.3.2 Minimizing power losses Please pay special attention to the supply power when you are designing your applications. Please make sure that the input voltage will never drop below 3.4V even in a transmitting burst during which the current consumption may rise up to 2A.
  • Page 27 SIM802 Hardware Design 3.4.1.1 Turn on SIM802 using the PWRKEY Pin (Power on) Turn on the SIM802 by driving the PWRKEY to a low level voltage for a period time. This Pin is pulled up to VBAT in the module. The simple circuit illustrates as the following figures. PWRKEY 4.7K Turn on impulse...
  • Page 28: Figure 8 Timing Of Turn On System

    SIM802 Hardware Design VBAT Pulldown > 2s > 0.6*VBAT PWRKEY (INPUT) <0.2*VBAT STATUS (OUTPUT) Figure 8 Timing of turn on system When power on procedure completed, SIM802 will send out following result code to indicate the module is ready to operate, when set as fixed baud rate. STATUS Pin will drive to 2.8V and keep this level when in work mode.
  • Page 29: Turn Off Sim802

    SIM802 Hardware Design From GHOST MODE to NORMAL MODE 3.4.1.3 Turn on SIM802 using the RTC (Alarm mode) Alarm mode is a power-on approach by using the RTC. The alert function of RTC makes the SIM802 wakeup while the module power off. In alarm mode, SIM802 will not register to GSM network and the software protocol stack is closed.
  • Page 30: Figure 9: Timing Of Turn Off System

    SIM802 Hardware Design over-voltage is detected Over-temperature or under-temperature automatic shutdown: Take effect if over-temperature or under-temperature is detected 3.4.2.1 Turn off SIM802 using the PWRKEY Pin (Power down) You can turn off the SIM802 by driving the PWRKEY to a low level voltage for a period time. The power down scenarios illustrate as figure 9.
  • Page 31 SIM802 Hardware Design Please refer to document [1] for detail about the AT command of “AT+CPOWD”. 3.4.2.3 Over-voltage or under-voltage automatic shutdown The module will constantly monitor the voltage applied on the VBAT. If the voltage ≤ 3.5V, the following URC will be presented: UNDER-VOLTAGE WARNNING If the voltage ≥...
  • Page 32: Charging Interface

    SIM802 Hardware Design After this moment, the AT commands can’t be executed. The module logs off from network and enters POWER DOWN mode, and only the RTC is still active. POWER DOWN can also be indicated by STATUS Pin, which is a low level voltage in this mode. To monitor the temperature, you can use the “AT+CMTE”...
  • Page 33: Battery Pack Characteristics

    SIM802 Hardware Design Figure 11: Battery charger and pack The function of detecting the temperature of battery should be supported by the software in the module. It’s a customization function. The R is a NTC thermistor. We recommend to use TEMP NCP15XH103F03RC from MURATA.
  • Page 34: Recommended Battery Pack

    SIM802 Hardware Design 3.5.2 Recommended battery pack Following is the spec of recommended battery pack: Table 8: Spec of recommended battery pack Product name & type BYD, Li-Ion, 3.7V, 580mAh To obtain more information BYD COMPANY LIMITED Please contact : Normal voltage 3.7V Capacity...
  • Page 35: Operating Modes During Charging

    SIM802 Hardware Design UVLO (under voltage lock out) means the battery voltage less than 3.2V and more than 2.4V. The battery is not suitable for fast charge when its condition is DDLO or UVLO. The SIM802 provides a small constant current to the battery when the battery is between DDLO and UVLO. In DDLO charge, SIM802 gives out 5mA current to the battery.
  • Page 36: Charger Requirements

    SIM802 Hardware Design Connect charger to module’s VCHG Pin Battery can be charged when GSM while SIM802 is in POWER DOWN engine is not registered to GSM mode. network; Only a few AT commands is available IMPORTANT: Here GHOST mode is as listed below.
  • Page 37: Minimum Functionality Mode

    SIM802 Hardware Design interface signal can be used to lead system to be SLEEP mode (or Slow clocking mode). 3.6.1 Minimum functionality mode Minimum functionality mode reduces the functionality of the module to a minimum and, thus, minimizes the current consumption to the lowest level. This mode is set with the “AT+CFUN” command which provides the choice of the functionality levels <fun>=0,1,4 0: minimum functionality;...
  • Page 38: Srd Sleep Mode (Slow Clocking Mode)

    SIM802 Hardware Design When DTR is in high level, and there is no on air and audio activity is required and no hardware interrupt (such as GPIO interrupt or data on serial port), SIM802 will enter SLEEP mode automatically. In this mode, SIM802 can still receive paging or SMS from network. In SLEEP mode, the serial port is not accessible.
  • Page 39: Rtc Backup

    SIM802 Hardware Design AT+CPOWD or timer expire, using PWRKEY the module turn on and enter Alarm mode Ghost mode Disconnect No direct Turn on the module Set alarm by (Charge-only charger transition, but using PWRKEY OR “AT+CALAR mode) via “Charging SET AT Command M”, when the in normal”...
  • Page 40: Figure 13: Rtc Supply From Non-Chargeable Battery

    SIM802 Hardware Design Figure 13: RTC supply from non-chargeable battery Figure 14: RTC supply from rechargeable battery Figure 15: RTC supply from capacitor Li-battery backup SIM802_HD_V2.01 12.01.2010...
  • Page 41: Figure 16: Panasonic Eecemoe204A Charge Characteristic

    SIM802 Hardware Design Rechargeable Lithium coin cells such as the TC614 from Maxell, or the TS621 from Seiko, are also small in size, but have higher capacity than the double layer capacitors resulting in longer backup times. Typical charge curves for each cell type are shown in following figures. Note that the rechargeable Lithium type coin cells are generally pre-charged from the vendor.
  • Page 42: Table 12: Specification Of Xh414H-Iv01E

    SIM802 Hardware Design Figure 18: Seiko TS621 Charge Characteristic Capacitor backup Some suitable coin cells are the coin-type capacitors available from SEIKO (XH414H-IV01E), or from SHOEI (PAS414HR-VG1). They have a small physical size (4.8 mm diameter) and give hours of backup time. The specification of XH414H-IV01E is shown in following table.
  • Page 43: Serial Interfaces

    SIM802 Hardware Design 3.9 Serial interfaces SIM802 provides two unbalanced asynchronous serial ports. One is the main serial port and the other is the debug serial port. The GSM module is designed as a DCE (Data Communication Equipment), following the traditional DCE-DTE (Data Terminal Equipment) connection. The module and the client (DTE) are connected through the following signal (as figure 19 shows).
  • Page 44: Main Serial Port And Debug Serial Port Supporting

    SIM802 Hardware Design Figure 19: Connection of serial ports Note: The RTS PIN must be connected to the GND in the customer circuit when only the TXD and RXD are used in the Serial Port communication. 3.9.1 Main serial port and Debug serial port supporting Main serial port Seven lines on Serial Port Interface Contains Data lines TXD and RXD, State lines RTS and CTS, Control lines DTR, DCD and...
  • Page 45: Gsm Part Software Upgrade And Software Debug

    SIM802 Hardware Design 9600, 19200, 38400, 57600, 115200bps Note: You can use software to set a fixed baud rate and save the configuration to non-volatile flash memory. After the configuration was saved as fixed baud rate, the Unsolicited Result Codes like "RDY" should be received from the serial port all the time when the SIM802 was power on.
  • Page 46: Figure 21: Connection Of Software Debug

    SIM802 Hardware Design Figure 21: Connection of software debug The main serial port and the debug serial port don’t support the RS_ level and it only supports the CMOS level. Please refer to the table 5 for details about the voltage level. You should add the level converter IC between the DCE and DTE.
  • Page 47: Audio Interfaces

    SIM802 Hardware Design 3.10 Audio interfaces Table 14: Audio interface signal Name Function (AIN1/AOUT1) MIC1P Microphone1 input + MIC1N Microphone1 input - SPK1P Audio1 output+ SPK1N Audio1 output- (AIN2/AOUT2) MIC2P Microphone2 input + MIC2N Microphone2 input - SPK2P Audio2 output+ SPK2N Audio2 output- The module provides two analogy input channels, AIN1 and AIN2, which may be used for both...
  • Page 48: Speaker Interface Configuration

    SIM802 Hardware Design 3.10.1 Speaker interface configuration Close to speaker Differential layout 10pF 33pF ANTI SPK1P MODULE 10pF 33pF SPK1N 10pF 33pF ANTI Figure 23: Speaker interface configuration Close to speaker Differential layout 10pF 33pF Amplifier Circui ANTI 10pF MOUDLE 10pF 33pF ANTI...
  • Page 49: Microphone Interfaces Configuration

    SIM802 Hardware Design 3.10.2 Microphone interfaces configuration Close to Microphone Difference layout 10pF 33pF ANTI MICxP Electret 10pF 33pF Microphone MICxN AGND 33pF 10pF ANTI AGND Figure 25: Microphone interface configuration Figure 26: Earphone interface configuration 3.10.3 Referenced electronic characteristic SIM802_HD_V2.01 12.01.2010...
  • Page 50: Sim Interface

    SIM802 Hardware Design Table 15: MIC Input Characteristics Parameter Unit Working Voltage Working Current External k Ohms Microphone Load Resistance Table 16: Audio Output Characteristics Parameter Unit Normal Single load Output(SPK1) Ended Resistance Ref level 0.5477 -12.04 Differential load Resistance Ref level 1.0954 -6.02...
  • Page 51: Design Considerations For Sim Card Holder

    SIM802 Hardware Design The SIM interface is powered from an internal regulator in the module having normal voltage 3V. All pins reset as outputs driving low. Logic levels are as described in table Table 17: Signal of SIM interface Signal Description SIM_VDD SIM Card Power supply, it can identify automatically the SIM Card...
  • Page 52: Design Considerations For Sim Card Holder

    SIM802 Hardware Design 220nF SIM_VDD SIM_VDD SIM_CLK SIM_CLK SIM802 SIM_RST SIM_RST MODULE SIM CARD SIM_DATA SIM_DATA MOLEX-91228 Figure 27: SIM interface reference circuit with 6 pins SIM card 3.11.3 Design considerations for SIM card holder For 6 pins SIM card, we recommend to use Amphenol C707-10M006 512 2 .You can visit http://www.amphenol.com for more information about the holder.
  • Page 53: Table 18: Pin Description (Amphenol Sim Card Holder)

    SIM802 Hardware Design Figure 28: Amphenol C707-10M006 512 2 SIM card holder Table 18: Pin description (Amphenol SIM card holder) Signal Description SIM_VDD SIM Card Power supply, it can identify automatically the SIM Card power mode, one is 3.0V±10%, and another is 1.8V±10%.
  • Page 54: Lcd Display Interface

    SIM802 Hardware Design SIM Card Detect 0Ω pulled up to VEXT Connect to GND. Not connect. SIM_DATA SIM Card data I/O. SIM Card Detect 10KΩ pulled down to GND For 8 pins SIM card holder, we recommend to use Molex 91228.You can visit http://www.molex.com for more information about the holder.
  • Page 55: General Purpose Input & Output (Gpio)

    DISP_RST LCD reset Note: This function is not supported in the default firmware. For more information, please contact SIMCom. 3.13 General purpose input & output (GPIO) SIM802 provides a limited number of General Purpose Input/Output signal Pin. Table 21: GPIO of SIM802...
  • Page 56: Behaviors Of The Ring Line (The Main Serial Interface Only)

    SIM802 Hardware Design 3.15 Behaviors of the Ring line (The main serial interface only) Table 23: Behaviours of the Ring line State RI respond Standby HIGH Voice calling Change LOW, then: ( 1 ) Change to HIGH when establish calling. (...
  • Page 57: Network Status Indication Led Lamp

    SIM802 Hardware Design 3.16 Network status indication LED lamp The NETLIGHT Pin can be used to drive a network status indication LED lamp. The working state of this Pin is listed in table 24: Table 24: Working state of network status indication LED Pin State SIM802 function SIM802 is not running...
  • Page 58: Figure 34: Spi Application Of The Srd Interface

    The reference circuit for SPI shown as following figure: SIM802 APPLICATION MODULE MISO MOSI SCLK Figure 34: SPI application of the SRD interface Note: This function is not supported in the default firmware. For more information, please contact SIMCom. SIM802_HD_V2.01 12.01.2010...
  • Page 59: Buzzer

    SIM802 Hardware Design 3.18 Buzzer The buzzer can be used to drive a buzzer to indicate incoming call. The output volume of buzzer can be set by “AT+CRSL”. The reference circuit for buzzer shown as following figure: VBAT 4.7K BUZZER Figure 35: Reference circuit of Buzzer Table 26: Buzzer output characteristics Parameter...
  • Page 60: Antenna Interface

    SIM802 Hardware Design 4 Antenna interface The Pin 45 is the GSM RF antenna pad. The RF interface has an impedance of 50Ω. The Pin 33 is the SRD RF antenna pad. The RF interface has an impedance of 50Ω. 4.1 Antenna installation 4.1.1 Antenna pad SIM802 provides RF antenna interface.
  • Page 61: Module Rf Output Power

    SIM802 Hardware Design 4.2 Module RF output power Table 27: SIM802 conducted RF output power Frequency EGSM900 33dBm ±2db 5dBm±5db GSM850 33dBm ±2db 5dBm±5db DCS1800 30dBm ±2db 0dBm±5db PCS1900 30dBm ±2db 0dBm±5db SRD-RF 18dBm 9dBm The SRD-RF output power can be programmed from 9dBm to 18dBm in 3dB steps. It can be easily set through AT command.
  • Page 62: Electrical, Reliability And Radio Characteristics

    SIM802 Hardware Design 5 Electrical, reliability and radio characteristics 5.1 Absolute maximum ratings Absolute maximum rating for power supply and voltage on digital and analog pins of SIM802 are listed in table31: Table 31: Absolute maximum rating Parameter Unit Peak current of power supply RMS current of power supply (during one TDMA- frame) Voltage at digit pins -0.3...
  • Page 63: Current Consumption

    SIM802 Hardware Design Voltage ripple Normal condition, power control level for Pout max @ f<200kHz @ f>200kHz IVBAT Average supply POWER DOWN mode current SLEEP mode ( BS-PA-MFRMS=5 ) IDLE mode GSM850/EGSM 900 18.7 DCS1800/PCS1900 TALK mode GSM850/EGSM 900 DCS1800/PCS1900 DATA mode GPRS, (3 Rx, 2 TX) GSM850/EGSM 900 DCS1800/PCS1900...
  • Page 64: Electro-Static Discharge

    SIM802 Hardware Design @power level #19,Typical 90mA DCS1800/PCS1900 @power level #0 <300mA,Typical 220mA @power level #10,Typical 83mA @power level #15,Typical 76mA DATA mode, GPRS ( 3 Rx, 2 Tx ) CLASS 10 GSM 850/EGSM 900 @power level #5 <550mA,Typical 420mA @power level #10,Typical 225mA @power level #19,Typical 142mA DCS1800/PCS1900...
  • Page 65: Mechanics

    SIM802 Hardware Design 6 Mechanics This chapter describes the mechanical dimensions of SIM802. 6.1 Mechanical dimensions of SIM802 Following shows the mechanical dimensions of SIM802 (top view, side view and bottom view). All dimensions are shown in millimeters. Figure 37: SIM802 top view SIM802_HD_V2.01 12.01.2010...
  • Page 66: Figure 38: Sim802 Side View

    SIM802 Hardware Design Figure 38: SIM802 side view Figure 39: SIM802 bottom view SIM802_HD_V2.01 12.01.2010...
  • Page 67: Figure 40: Pad Bottom View

    SIM802 Hardware Design Figure 40: Pad bottom view Following shows the footprint recommendation dimensions of SIM802. SIM802_HD_V2.01 12.01.2010...
  • Page 68: Figure 41: Footprint Recommendation

    SIM802 Hardware Design Figure 41: Footprint recommendation : Notes Keep out on the user mainboard below the test point and the keep out area, as these are solder mask. For maintain this module, the placement must be keep a distance between the module and other component about 3 mm, and the height of near components must less than 16mm.
  • Page 69: Pin Assignment Of Sim802

    SIM802 Hardware Design 6.2 PIN assignment of SIM802 Table 36: PIN assignment Pin No. NAME Pin No. NAME DBG_RXD DBG_TXD SRD_RF STATUS SIM_DATA SIM_CLK SIM_RST SCLK SIM_VDD MISO KROW0 MOSI PWRKEY DISP_CLK NRST DISP_DATA VRTC GSM_RF DISP_D/C MIC2P MIC2N MIC1N VBAT MIC1P VBAT...
  • Page 70: Figure 42: Sim802 Pins Definition (Top View)

    SIM802 Hardware Design 59 58 57 56 55 54 53 52 50 49 48 47 46 45 DEBUG_RXD DEBUG_TXD NRST STATUS SIM_DATA MOSI SIM_CLK MISO SIM_RST SCLK SIM802 SIM_VDD KROW0 PWRKEY DISP_CLK SRD_RF DISP_DATA VRTC DISP_D/C 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Figure 42: SIM802 pins definition (top view)
  • Page 71: Figure 43: Bottom View Of Sim802

    SIM802 Hardware Design Figure 43: Bottom view of SIM802 Figure 44: Top view of SIM802 SIM802_HD_V2.01 12.01.2010...
  • Page 72: The Ramp-Soak-Spike Reflow Profile Of Sim802

    SIM802 Hardware Design 6.3 The ramp-soak-spike reflow profile of SIM802 If both sides of the mainboard have SMD parts, the SIM802 module must be soldered last. Figure 45: The ramp-soak-spike reflow profile of SIM802 SIM802_HD_V2.01 12.01.2010...
  • Page 73 Shanghai SIMCom Wireless Solutions Ltd. Add: SIM Technology Building, No.633, Jinzhong Road, Changning District, Shanghai, P. R. China 200335 Tel: +86 21 3252 3300 Fax: +86 21 3252 3020 URL: www.sim.com/wm...

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