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SIM Tech SIMCom SIM2000S Hardware Design

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  • Page 1 SIM2000S_Hardware_Design_V1.00...
  • Page 2 Smart Machine Smart Decision SIM2000S Hardware Design Document Title 1.00 Version 2014-02-27 Date Release Status SIM2000S_Hardware_Design_V1.00 Document Control ID 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.

  • Page 3: Table Of Contents

    Smart Machine Smart Decision Contents Version History......................8 Introduction......................9 SIM2000S Overview .................... 9 2.1. SIM2000S Key Features .......................9 2.2. Operating Mode ........................11 2.3. Functional Diagram......................11 Package Information ..................13 3.1. Pin out Diagram ........................13 3.2. Pin Description........................13 3.3.
  • Page 4 Smart Machine Smart Decision 4.8.1. PCM Multiplexing Function ....................... 35 4.8.2. PCM Interface ............................. 35 4.8.3. Auxiliary PCM (128 KHz PCM clock)....................35 4.8.4. Primary PCM (2048KHz PCM clock) ....................37 4.9. Keypad Interface .........................38 4.9.1 Keypad Multiplexing Function ......................39 4.10.
  • Page 5 Smart Machine Smart Decision Table Index TABLE 1: SIM2000S KEY FEATURES..........................9 TABLE 2: OVERVIEW OF OPERATING MODES......................11 TABLE 3: PIN DESCRIPTION ............................13 TABLE 4: RECOMMENDED ZENER DIODE ......................18 TABLE 5: ELECTRONIC CHARACTERISTIC OF THE RESET PIN................23 TABLE 6: THE CURRENT CONSUMPTION OF MINIMUM FUNCTIONALITY MODE ........
  • Page 6 Smart Machine Smart Decision TABLE 46: OPERATING FREQUENCIES........................48 TABLE 47: CONDUCTED RECEIVE SENSITIVITY ....................48 TABLE 48: MOISTURE SENSITIVITY LEVEL AND FLOOR LIFE ................50 TABLE 49: BAKING REQUIREMENTS ........................50 TABLE 50: RELATED DOCUMENTS ........................... 51 TABLE 51: TERMS AND ABBREVIATIONS........................ 52 TABLE 52: SAFETY CAUTION.............................
  • Page 7 Smart Machine Smart Decision Figure Index FIGURE 1: SIM2000S FUNCTIONAL DIAGRAM ....................... 12 FIGURE 2: SIM2000S PIN OUT DIAGRAM (TOP VIEW)................... 13 FIGURE 3: DIMENSIONS OF SIM2000S (UNIT: MM)....................16 FIGURE 4: RECOMMENDED PCB FOOTPRINT OUTLINE (UNIT: MM) ..............17 FIGURE 5: REFERENCE CIRCUIT OF THE VBAT INPUT..................

  • Page 8: Version History

    Smart Machine Smart Decision Version History Date Version Description of change Author 2014-02-27 1.00 draft Yanwu.Wang; Haibing.Ye SIM2000S_Hardware_Design_V1.00 2014-02-27...

  • Page 9: Introduction

    Smart Machine Smart Decision 1. Introduction This document describes SIM2000S hardware interface in great detail. This document can help user to quickly understand SIM2000S interface specifications, electrical and mechanical details. With the help of this document and other SIM2000S application notes, user guide, users can use SIM2000S to design various applications quickly.
  • Page 10 Smart Machine Smart Decision EVRC-B(or 4GV) Microphone: 8kHz sampling rate,16bit Audio AGC PCM post processing Echo Cancellation 8,16 or 32kHz Tx path sampling rate Serial port: Full modem interface with status and control lines, unbalanced, asynchronous 115200bps Can be used for AT commands or data stream Support RTS/CTS hardware handshake and software ON/OFF flow control Programmable parameters Data size...

  • Page 11: Operating Mode

    Smart Machine Smart Decision Size: 24*24*3mm Physical characteristics Weight: 3.4g Firmware upgrade USB port 2.2. Operating Mode The table below summarizes the various operating modes of SIM2000S. Table 2: Overview of operating modes Mode Function Module will automatically go into sleep mode if the conditions of sleep mode are enabling and there is no on air and no hardware interrupt (such as GPIO CDMA interrupt or data on serial port).

  • Page 12: Figure 1: Sim2000S Functional Diagram

    Smart Machine Smart Decision Figure 1: SIM2000S functional diagram SIM2000S_Hardware_Design_V1.00 2014-02-27...

  • Page 13: Package Information

    Smart Machine Smart Decision 3. Package Information 3.1. Pin out Diagram Figure 2: SIM2000S pin out diagram (Top view) 3.2. Pin Description Table 3: Pin description Power Pin name Pin number Description Comment domain(V) SIM2000S_Hardware_Design_V1.00 2014-02-27...
  • Page 14 Smart Machine Smart Decision Power supply VBAT 55,56,57 3.4~4.4 Power supply 2.85V output power If it is unused, keep VDD_EXT 2.85 supply open. 2,17,18,29,39, 45,46,53,54, Ground 58,59,61,62, 63,64,65 Power on/down PWRKEY should pulled low at least 1 PWRKEY second and then released Pulled up internally.
  • Page 15 Smart Machine Smart Decision KBC0 keypad column 1 KBC1 keypad column 1 KBC2 keypad column 2 KBC3 keypad column 3 KBC4 keypad column 4 GPIO33 GPIO33 GPIO34 GPIO34 Serial port Receive data Transmit data Request to send If these pins are unused, 2.85 Clear to send keep open.

  • Page 16: Package Dimensions

    Smart Machine Smart Decision 3.3. Package Dimensions Figure 3: Dimensions of SIM2000S (Unit: mm) SIM2000S_Hardware_Design_V1.00 2014-02-27...

  • Page 17: Figure 4: Recommended Pcb Footprint Outline (Unit: Mm)

    Smart Machine Smart Decision Figure 4: Recommended PCB footprint outline (Unit: mm) SIM2000S_Hardware_Design_V1.00 2014-02-27...

  • Page 18: Application Interface

    Smart Machine Smart Decision 4. Application Interface 4.1. Power Supply The power supply range of SIM2000S is from 3.4V to 4.4V. Recommended voltage is 3.8V. The power supply must be able to provide sufficient current up to 600mA. For the VBAT input, a bypass capacitor (low ESR) such as a 100 µF is strongly recommended.

  • Page 19: Power Supply Pin

    Smart Machine Smart Decision If there is a high drop-out between the input and the desired output (VBAT), a DC-DC power supply will be preferable because of its better efficiency especially with the 600mA current of the module. The following figure is the reference circuit.

  • Page 20: Figure 8: Powered On/Down Module Using Transistor

    Smart Machine Smart Decision Figure 8: Powered on/down module using transistor 1.8V 200K Power PWRKEY on/down logic MODULE Figure 9: Powered on/down module using button The power on timing is illustrated as in the following figure. Figure 10: Timing of power on module When power on procedure is completed, SIM2000S will send following URC to indicate that the module is ready to operate at fixed baud rate.

  • Page 21: Power Down Sim2000S

    Smart Machine Smart Decision 4.2.2. Power down SIM2000S SIM2000S will be powered down in the following situations: Normal power down procedure: power down SIM2000S by the PWRKEY pin. Normal power down procedure: power down SIM2000S by AT command “AT+CPOWD=1”. Abnormal power down: over-voltage or under-voltage automatic power down. Abnormal power down: over-temperature or under-temperature automatic power down.

  • Page 22: Reset Function

    Smart Machine Smart Decision If the voltage ≥ 4.3V, the following URC will be reported: OVER-VOLTAGE WARNNING If the voltage < 3.4V, the following URC will be reported, and the module will be automatically powered down. UNDER-VOLTAGE POWER DOWN If the voltage > 4.4V, the following URC will be reported, and the module will be automatically powered down. OVER-VOLTAGE POWER DOWN At this moment, AT commands can not be executed any more.

  • Page 23: Power Saving Mode

    Smart Machine Smart Decision The typical value of RESET pin at High level is 1.8V, so for the 1.8V, customer could use MCU’s GPIO to drive this pin directly, cascading some resistors could enhance the ESD performance but the value should not be too big;...

  • Page 24: Sleep Mode (At+Csclk=1)

    Smart Machine Smart Decision Symbol Parameter Conditions Value Unit Power down mode Sleep mode Cellular 450M (CMU2000) CH=1 461.35 Cellular 450M CH=100 512.13 MAX POWER CH=193 506.79 VBAT CH=1 93.86 Cellular 450M VBAT current Voice call 96.35 CDMA CH=100 (CMU2000) POWER-60dBm 94.28 CH=193...

  • Page 25: Function Of Serial Port

    Smart Machine Smart Decision Table 7: Serial port and Debug pin definition Pin name Pin number Function Data terminal ready Ring indicator Data carrier detect Serial port Request to send Clear to send Transmit data Receive data DBG_TXD Debug port Used for debug DBG_RXD VBUS...

  • Page 26: Figure 14: Connection Of The Serial Interfaces

    Smart Machine Smart Decision Figure 14: Connection of the serial interfaces The following figure shows the connection of the inner module. Figure 15: Connection of the inner module If the voltage of UART is 3.3V, the following reference circuits are recommended. SIM2000S_Hardware_Design_V1.00 2014-02-27...

  • Page 27: Usb Interface

    Smart Machine Smart Decision Figure 16: Level matching circuit 4.4.3 USB Interface SIM2000S could achieve software debug function through USB interface. When powering on the module, connecting VBUS, USB_DP, USB_DM, and GND to PC, then installing the driver following the prompts, a USB port could be recognized by PC, customer could achieve the software Debug with USB port.

  • Page 28: Software Upgrade And Debug

    Smart Machine Smart Decision Table 9: VBUS operation voltage Unit VBUS 4.4.4 Software Upgrade and Debug Customer could upgrade module’s firmware through USB. If upgrading through USB port, it is necessary to power on SIM2000S first, and then connect VBUS, USB_DP, USB_DM, and GND to PC.

  • Page 29: Figure 18: Ri Behaviour Of Voice Calling As A Receiver

    Smart Machine Smart Decision State RI response Standby High The pin is changed to low. When any of the following events occurs, the pin will be changed to high: Voice call （1）Establish the call （2）Hang up the call The pin is changed to low. When any of the following events occurs, the pin will be changed to high: Data call （1）Establish the call...

  • Page 30: Audio Interfaces

    Smart Machine Smart Decision However, if the module is used as caller, the RI will remain high. Please refer to the following figure. Figure 21: RI behaviour as a caller 4.6. Audio Interfaces SIM2000S provides an analog inputs (MICP; MICN), which could be used for electret microphone. The module also provides an analog output (SPKP;...

  • Page 31: Microphone Interfaces Configuration

    Smart Machine Smart Decision 4.6.2. Microphone Interfaces Configuration Figure 23: Microphone reference circuit 4.6.3. Audio Electronic Characteristic Table 14: Microphone input characteristics Parameter Unit Microphone biasing voltage Input impedance(differential) KΩ Table 15: Audio output characteristics Parameter Unit Speaker output voltage 1.11 1.25 1.40...

  • Page 32: Ruim Card Design Guide

    Smart Machine Smart Decision It is recommended to use an ESD protection component such as ON (http://onsemi.com) SMF12CT1G. That the RUIM peripheral circuit should be close to the RUIM card socket. The reference circuit of the 8-pin RUIM card holder is illustrated in the following figure. Figure 24: Reference circuit of the 8-pin RUIM card holder The RUIM_PRESENCE pin is used for detection of the RUIM card hot plug in.

  • Page 33: Design Considerations For Ruim Card Holder

    Smart Machine Smart Decision Add some TVS and the parasitic capacitance should not exceed 50pF, and 22Ohm resistor in serials, the RUIM signal could enhance ESD protection. 4.7.3. Design Considerations for RUIM Card Holder For 8 pins RUIM card holder, SIMCom recommends to use Molex 91228. User can visit http://www.molex.com for more information about the holder.

  • Page 34: Pcm Interface

    Smart Machine Smart Decision http://www.amphenol.com for more information about the holder. Figure 27: Amphenol C707 10M006 5122 RUIM card holder Table 18: Pin description (Amphenol RUIM card holder) Pin name Signal Description RUIM_VDD RUIM card power supply RUIM_RST RUIM card reset RUIM_CLK RUIM card clock Connect to GND...

  • Page 35: Pcm Multiplexing Function

    Smart Machine Smart Decision Table 20: PCM specification Parameter Specification Line Interface Format Linear(Fixed) Data length 8/16bits PCM Clock/Sync Source Slave/Master Mode PCM Clock Rate 256Khz、2.048Mhz Data Ordering MSB/LSB both support 4.8.1. PCM Multiplexing Function The following table shows the detailed multiplexing function. Table 21: PCM multiplexing function Pin name Pin number...

  • Page 36: Table 22: Timing Parameters

    Smart Machine Smart Decision Figure 30: EXT CODEC to MODULE timing Figure 31: MODULE to EXT CODEC timing Table 22: Timing parameters Parameter Description Unit T(auxsync) PCMSYNC cycle time μs T(auxsynch) PCMSYNC high time 62.4 62.5 μs T(auxsyncl) PCMSYNC low time 62.4 62.5 μs...

  • Page 37: Primary Pcm (2048Khz Pcm Clock)

    Smart Machine Smart Decision 4.8.4. Primary PCM (2048KHz PCM clock) SIM2000S also supports 2.048 MHz PCM data and sync timing for υ -law codec. This is called the primary PCM interface. User can use AT command to take the mode you want as discussed above. Figure 32: Synchrony timing Figure 33: EXT CODEC to MODULE timing Figure 34: MODULE to EXT CODEC timing...

  • Page 38: Keypad Interface

    Smart Machine Smart Decision T(clk) PCMCLK cycle time T(clkh) PCMCLK high time T(clkl) PCMCLK low time T(susync) PCMSYNC setup time high before falling edge of PCMCLK T(hsync) PCMSYNC hold time after falling edge of PCMCLK T(sudin) PCMDIN setup time before falling edge of PCMCLK T(hdin) PCMDIN hold time after falling edge of PCMCLK T(pdout)

  • Page 39: Keypad Multiplexing Function

    Smart Machine Smart Decision KBC4 Pull up KBR0 Pull down KBR1 Pull down Keypad matrix row KBR2 Pull down KBR3 Pull down KBR4 Pull down 4.9.1 Keypad Multiplexing Function Table 25: Keypad multiplexing function Pin name Pin number Mode 0(default) Mode 1 KBC0 KBC0...

  • Page 40: General Purpose Input/Output (Gpio)

    Smart Machine Smart Decision 4.11. General Purpose Input/Output (GPIO) SIM2000S provides 2 GPIO pins. The output voltage level of the GPIO can be set by AT command “AT+ SGPIO”. The input voltage level of the GPIO can also be read by AT command “AT+ SGPIO”. For more details, please refer to document [1].

  • Page 41: Network Status Indication

    Smart Machine Smart Decision A typical recommended circuit of the PWM driver buzzer is shown in the following figure. MODULE 4.7K Figure 36: Reference circuit of PWM driver buzzer Table 32: Buzzer output characteristics Parameter Unit Output voltage 2.85 Output current Note: PWM pin must be kept at low power level when module is in the power on procedure.

  • Page 42: Netlight Multiplexing Function

    Smart Machine Smart Decision Figure 37: Reference circuit of NETLIGHT 4.15. NETLIGHT Multiplexing Function Table 35: NETLIGHT multiplexing function Pin name Pin number Mode 0(default) Mode 1 NETLIGHT NETLIGHT GPIO31 Note: Multiplexing function need different software supply. 4.16. Operating Status Indication The pin66 is for operating status indication of the module.

  • Page 43: Figure 38: Antenna Matching Circuit

    Smart Machine Smart Decision connected to module’s antenna pad through micro-strip line or other type of RF trace and the trace impedance must be controlled in 50Ω. SIMCom recommends that the total insertion loss between the antenna pad and antenna should meet the following requirements: CDMA 450MHZ<0.5dB ●...

  • Page 44: Pcb Layout

    Smart Machine Smart Decision 5. PCB Layout Usually, most electronic products with good performance are based on good PCB layout. A bad PCB layout will lead to lots of issues, like RUIM card not being detected, etc. The final solution for these problems is to redo PCB layout.

  • Page 45: Principle Of Pcb Layout

    Smart Machine Smart Decision Principle of PCB layout During layout, attention should be paid to the following interfaces, like Antenna, power supply, RUIM card interface, audio interface, and so on. 5.2.1 Antenna Interface The basis principle is that the length of trace between pin output and connector should be as short as possible in order to avoid coupling issue.

  • Page 46: Electrical, Reliability And Radio Characteristics

    Smart Machine Smart Decision 6. Electrical, Reliability and Radio Characteristics Absolute Maximum Ratings The absolute maximum ratings stated in following table are stress ratings under non-operating conditions. Stresses beyond any of these limits will cause permanent damage to SIM2000S. Table 38: Absolute maximum ratings Symbol Unit VBAT...

  • Page 47: Ruim_Vdd Characteristics

    Smart Machine Smart Decision High-level input voltage 1.8525 2.88 Low-level input voltage -0.3 0.9975 High-level output voltage 2.85 Low-level output voltage 0.45 IIH Input high leakage current Input low leakage current RUIM_VDD Characteristics Table 42: RUIM_VDD characteristics Symbol Parameter Unit Output voltage Output current VDD_EXT Characteristics...

  • Page 48: Table 46: Operating Frequencies

    Smart Machine Smart Decision Table 46: Operating frequencies Frequency Receiving Transmission CDMA 450MHZ Block C 460～464.8MHz 450～454.8MHz Table 47: Conducted receive sensitivity Frequency Receive sensitivity(Max) Receive sensitivity（Typical） CDMA 450MHZ Block C -108dBm -106dBm SIM2000S_Hardware_Design_V1.00 2014-02-27...

  • Page 49: Manufacturing

    Smart Machine Smart Decision 7. Manufacturing 7.1. Top and Bottom View of SIM2000S Figure 40: Top and bottom view of SIM2000S 7.2. Typical Solder Reflow Profile Figure 41: Typical solder reflow profile SIM2000S_Hardware_Design_V1.00 2014-02-27...

  • Page 50: The Moisture Sensitivity Level

    Smart Machine Smart Decision 7.3. The Moisture Sensitivity Level The moisture sensitivity level of SIM2000S module is 3. The modules should be mounted within 168 hours after unpacking in the environmental conditions of temperature <30℃ and relative humidity of <60% (RH). It is necessary to bake the module if the above conditions are not met: Table 48: Moisture sensitivity level and floor life Moisture Sensitivity Level...

  • Page 51: Appendix

    Smart Machine Smart Decision 8. Appendix I. Related Documents Table 50: Related documents Document name Remark SIM2000S Series AT Command Manual AN Serial Port AN Serial Port SIM2000S_Hardware_Design_V1.00 2014-02-27...

  • Page 52: Terms And Abbreviations

    Smart Machine Smart Decision II. Terms and Abbreviations Table 51: Terms and abbreviations Abbreviation Description CDMA Code Division Multiple Access RUIM Removable User Identity Module Analog-to-Digital Converter Coding Scheme Circuit Switched Data Clear to Send Data Terminal Equipment (typically computer, terminal, printer) Data Terminal Ready Discontinuous Transmission Electrostatic Discharge...

  • Page 53: Safety Caution

    Smart Machine Smart Decision Not connect III. Safety Caution Table 52: 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 to not operate normally for RF energy interference.
  • Page 54 Smart Machine Smart Decision Contact us: Shanghai SIMCom Wireless Solutions Co.,Ltd. Address: Building A, SIM Technology Building, No. 633, Jinzhong Road, Shanghai, P. R. China 200335 Tel: +86 21 3252 3300 Fax: +86 21 3252 3020 URL: www.sim.com/wm SIM2000S_Hardware_Design_V1.00 2014-02-27...

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