TC35 TC37 Siemens Cellular Engines Hardware Interface Description Version: 03.10 DocID: TC35_37_HD_02_V03.
TC35 / TC37 Hardware Interface Description Document Name: TC35 / TC37 Hardware Interface Description Version: Date: 03.10 21.12.2001 Technical Support: wm.support@mch.siemens.de DocId: Status: TC35_37_HD_02_V03.10 Released General notes With respect to any damages arising in connection with the described product or this document, Siemens shall be liable according to the General Conditions on which the delivery of the described product and this document are based.
TC35 / TC37 Hardware Interface Description Contents 0 Version History........................................................................................................... 7 1 Introduction ................................................................................................................ 8 1.1 Scope of the document and related documents .................................................. 8 1.2 Terms and abbreviations ......................................................................
TC35 / TC37 Hardware Interface Description 3.9 3.8.2.3 Behaviour of the RING0 line ................................................................ 50 Pin assignment.................................................................................................. 51 4 Radio interface ......................................................................................................... 56 4.1 Receiver .....................................................................................................
TC35 / TC37 Hardware Interface Description Figures Figure 1: Block diagram of TC35 ......................................................................................... 18 Figure 2: Block diagram of TC37 ......................................................................................... 19 Figure 3: Block diagram of a cellular application.................................................................. 21 Figure 4: Power supply limits during transmit burst........................................
TC35 / TC37 Hardware Interface Description Tables Table 1: TC35 / TC37 key features...................................................................................... 16 Table 2: Overview of operating modes ................................................................................ 22 Table 3: Power supply pins of ZIF connector ....................................................................... 23 Table 4: Specifications of CGP34506 Panasonic battery pack .......................................
TC35 / TC37 Hardware Interface Description 0 Version History This chapter reports modifications and improvements over previous versions of the document. Preceding document: "TC35 Hardware Interface Description" Version V0300 New document: "TC35_TC37 Hardware Interface Description" Version 03.10 Chapter Page What is new 2.1 16 Data transmission rate 14.4kbps now implemented 3.2.2 Chapter revised, technical specification of recommended battery pack added 3.3.1.1 / 3.3.1.
TC35 / TC37 Hardware Interface Description 1 Introduction This document presents the hardware interface description of the Siemens GSM engines • • TC35 TC37 As TC35 and TC37 are intended to integrate with a wide range of cellular application platforms, all functional components are described in detail. So this guide covers all information you need to design and set up host devices incorporating TC35 or TC37.
TC35 / TC37 Hardware Interface Description 1.
TC35 / TC37 Hardware Interface Description Abbreviation Description HiZ High Impedance HR Half Rate IC Integrated Circuit IMEI International Mobile Equipment Identity I/O Input/Output ISO International Standards Organization ITU International Telecommunications Union kbps kbits per second LED Light Emitting Diode Li-Ion Lithium-Ion Mbps Mbits per second MMI Man Machine Interface MO Mobile Originated MS Mobile Station (GSM engine), also referred to as TE MSISDN Mobile Station
TC35 / TC37 Hardware Interface Description Abbreviation Description TA Terminal adapter (e.g.
TC35 / TC37 Hardware Interface Description 1.3 Standards The Siemens GSM engines described in this document have been approved to comply with the following directives and standards.
TC35 / TC37 Hardware Interface Description 1.4 Safety Precautions The following safety precautions must be observed during all phases of the operation, usage, service or repair of any cellular terminal or mobile incorporating TC35 or TC37. Manufacturers of the cellular terminal are advised to convey the following safety information to users and operating personnel and to incorporate these guidelines into all manuals supplied with the product.
TC35 / TC37 Hardware Interface Description SOS IMPORTANT! Cellular terminals or mobiles operate using radio signals and cellular networks cannot be guaranteed to connect in all conditions. Therefore, you should never rely solely upon any wireless device for essential communications, for example emergency calls. Remember, 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.
TC35 / TC37 Hardware Interface Description 2 Functions overview TC35 and TC37 GSM engines operate in the GSM 900 MHz and GSM 1800 MHz frequency bands. Designed to easily provide radio connection for voice and data transmission both modules integrate seamlessly with a wide range of GSM application platforms and are ideally suited to design and set up innovative cellular solutions with minimum effort. The complete RF part is incorporated and the GSM protocol runs autonomously on a GSM baseband processor.
TC35 / TC37 Hardware Interface Description 2.1 TC35 / TC37 key features at a glance Table 1: TC35 / TC37 key features Feature Implementation Transmission Voice, Data, SMS, Fax Power supply Single supply voltage 3.3V – 5.5V Please refer to Chapter 6.
TC35 / TC37 Hardware Interface Description Feature Implementation Serial interface RS232 (2.65V CMOS level) bi-directional bus for commands / data using AT commands TC35/TC37 modules support Multiplex mode according to the GSM 07.10 Multiplexer Protocol and enable one physical serial interface to be partitioned into three virtual channels. This allows you to take advantage of up to 3 simultaneous sessions on the serial interface.
TC35 / TC37 Hardware Interface Description 2.
TC35 / TC37 Hardware Interface Description 2.
TC35 / TC37 Hardware Interface Description 2.4 GSM baseband processor The GSM baseband processor handles all the processing for audio, signaling and data transfer within a GSM cellular device. Internal software runs the application interface and the whole GSM protocol stack. A UART forms the interface to the cellular device application. The GSM baseband processor is a single chip mixed signal baseband IC, containing all analog and digital functionality of a cellular radio.
TC35 / TC37 Hardware Interface Description 3 Application Interface The GSM engine connects to the application platform over the host interface, which takes the form of a 40-pin 0.5mm pitch ZIF connector. The host interface incorporates several sub-interfaces described in the following chapters: • Power supply and charging (see Chapters 3.2 and 3.3) • Serial interface (see Chapter 3.5) • Two audio interfaces (see Chapter 3.6) • SIM interface (see Chapter 3.
TC35 / TC37 Hardware Interface Description 3.1 Operating modes The table below briefly summarizes the various operating modes referred to in the following chapters. Table 2: Overview of operating modes Mode Function Power Down Operating voltage applied. Only a voltage regulator in the Power Supply ASIC is active for powering the RTC. Software is not active. The RS-232 interface is not accessible. Normal operation SLEEP Power saving mode set with AT+CFUN command. Software is active to minimum extent.
TC35 / TC37 Hardware Interface Description 3.2 Power supply The power supply of the GSM Engine has to be a single voltage source in the range of VBATT+ = 3.3V...5.5V. It must be able to provide a peak current of about 2A for uplink transmission and account for drops on the VBATT+ line that may be caused in transmit bursts. All the key functions for supplying power to the GSM engine are handled by an ASIC power supply.
TC35 / TC37 Hardware Interface Description 3.2.1 Minimizing power losses When designing the power supply for your application please pay specific attention to power losses. Ensure that the input voltage VBATT+ never drops below 3.3 V on the TC35/TC37 board, not even during transmit bursts. Also, make sure that any voltage drops that may occur during transmit bursts never exceed 400mV. It should be noted that TC35/TC37 will be switched off in the event of exceeding these limits.
TC35 / TC37 Hardware Interface Description 3.2.2 Battery pack For some applications the use of a battery pack may be required. TC35 and TC37 can be powered from a Li-Ion battery pack which must be specified for 3.8V, 0.85Ah and a final charge voltage of 4.2V. The charging algorithm has been optimized for a battery pack that meets the characteristics listed below. It is strongly recommended that the battery pack you want to integrate into your TC35/TC37 application is compliant with these specifications.
TC35 / TC37 Hardware Interface Description 3.2.2.1 Recommended battery pack The following battery pack has been especially designed to operate with TC35 and TC37 modules. Table 4: Specifications of CGP34506 Panasonic battery pack Product name Battery cell P/N "CGP34506 Panasonic" Vendor Shenzhen XWODA electronic Co., Ltd To place orders or obtain more information please contact: Mr. Wang Ming Wang Phone: +86 755 7619731 Fax: +86 755 7608078 Email: xwda@xwda.com.cn Nominal voltage 3.
TC35 / TC37 Hardware Interface Description 3.2.2.2 Supported charging technique Charging can be accomplished only in a temperature range from 0°C to +45°C. The charging process supports trickle charging and processor controlled fast charging. In trickle mode, the battery is charged at a rate of less than 10mA. The fast charging rate provided by the charger or any other external source must be limited to 500mA. See also Table 29.
TC35 / TC37 Hardware Interface Description What to do if software controlled charging does not start up? If the battery voltage fails to pass the 3.2V level when the 60 minutes timer expires, processor controlled charging does not begin. To solve the problem you can do one of the following: • Once the voltage has reached its minimum of 3V, you can try to start software controlled charging by pulling the IGT line to ground.
TC35 / TC37 Hardware Interface Description synchronization between DTE and DCE upon start-up). Therefore, it is recommended to select a fixed baudrate before using the Charge-only mode. While the Charge-only mode is in progress, you can take advantage of the AT commands listed in Table 5. For further instructions refer to the AT Command Set.
TC35 / TC37 Hardware Interface Description 3.3 Power up / down scenarios 3.3.1 Turn on the GSM engine TC35 and TC37 modules can be activated in a variety of ways which are described in the following chapters: • via ignition line IGT: starts normal operating state (see Chapters 3.3.1.1 and 3.3.1.2) • via POWER lines: starts charging algorithm (see Chapters 3.2.2.3 and 3.3.1.3) • via RTC interrupt: starts Alarm mode (see Chapter 3.3.1.4) 3.3.1.
TC35 / TC37 Hardware Interface Description 3.3.1.2 Timing of the ignition process When designing your application platform take into account that powering up TC35/TC37 requires the following steps. • The ignition line cannot be operated until VBATT+ passes the level of 3.0V. • 10ms after VBATT+ has reached 3.0V the ignition line can be switched low. The duration of the falling edge must not exceed 1ms. • Another 100ms are required to power up the module. • Ensure that VBATT+ does not fall below 3.
TC35 / TC37 Hardware Interface Description 3.3.1.3 Turn on GSM engine using the POWER lines As detailed in Chapter 3.2.2.3, the charging adapter can be connected regardless of the GSM engine's operating mode (except for Alarm mode). If the charger is connected to the POWER lines while the GSM engine is off, only the charging algorithm will be launched. The GSM engine runs in a restricted mode, referred to as Charge-only mode.
TC35 / TC37 Hardware Interface Description 3.3.2 Power saving Intended for power saving, the SLEEP mode reduces the functionality of the module to a minimum and, thus, minimizes the current consumption to the lowest level. To activate SLEEP mode use the AT command AT+CFUN=0. While SLEEP mode is effective, the serial interface is not responding. The module shortly wakes up to respond to a paging request from the base station and immediately returns to the power saving mode.
TC35 / TC37 Hardware Interface Description 3.3.4 Turn off GSM engine To switch the module off the following procedures may be used: • • • Normal procedure: Software controlled by sending an AT command over the RS232 application interface. See Chapter 3.3.4.1. Emergency shutdown: Hardware driven by switching the /PD (Power Down) line of the ZIF connector to ground = immediate shutdown of supply voltages, only applicable if the software controlled procedure fails! See Chapter 3.3.4.2.
TC35 / TC37 Hardware Interface Description 3.3.4.3 Automatic shutdown To ensure proper operation of all assemblies under varying conditions, such as temperature, input voltage, transmission power etc., the GSM engine features protection elements for automatic shutdown. Automatic shutdown takes effect if • the PCB is exceeding the critical limits of overtemperature or undertemperature • the battery is exceeding the critical limits of overtemperature or undertemperature.
TC35 / TC37 Hardware Interface Description Table 9: Dependency on ambient temperature Reason of shutdown Ambient Temperature High temperature Tamb > 70°C Low temperature Tamb<-25°C High temperature with battery pack Tamb,Akku> 60°C Low temperature with battery pack Tamb,Akku <-15°C Shutdown in the event of undervoltage The software constantly monitors the applied voltage to check that the voltage is sufficient to set up a call. When the supply decreases to Vbatt+< 3.
TC35 / TC37 Hardware Interface Description 3.3.
TC35 / TC37 Hardware Interface Description 3.4 RTC backup The internal Real Time Clock of TC35/TC37 is supplied from a dedicated voltage regulator which is part of the power supply ASIC and remains active while the module is powered down. An alarm function is included that allows to wake up the GSM engine without logging on to the GSM network. In addition, you can use the VDDLP pin on the ZIF connector (pin no. 30) to backup the RTC from an external capacitor, a battery or an accumulator.
TC35 / TC37 Hardware Interface Description VBATT+ Baseband processor PSU RTC ZIF VDDLP + + Figure 13: RTC supply from non-chargeable battery Note: In battery powered applications (Figure 12 and Figure 13), ensure that the voltage supplied from the batteries is VBATTERY ≤ VBATT+. The VDDLP voltage should be kept below the minimum VBATT+. voltage. This is significant to prevent the GSM engine from being powered over the RTC backup battery. Please refer to chapter 3.9, Table 18 for more information.
TC35 / TC37 Hardware Interface Description 3.5 Serial interface The data interface is implemented as a serial asynchronous transmitter and receiver conforming to ITU-T RS-232 Interchange Circuits DCE. It operates at CMOS level (2.65V). All RS-232 signals on the ZIF connector are low active. The GSM engine is designed for use as a DCE.
TC35 / TC37 Hardware Interface Description The data interface is configured for 8 data bits, no parity and 1 stop bit, and can be operated at bitrates from 300bps to 115kbps. Autobauding supports bit rates from 4.8kbps to 115kbps (except for 14.4kbps and 28.8kbps). Hardware handshake using the RTS0 / CTS0 signals and XON/XOFF software flow control are supported. *) In addition, the modem control signals DTR0 , DSR0, DCD0 and RING0 are available.
TC35 / TC37 Hardware Interface Description 3.6 Audio interface Each GSM engine comprises two audio interfaces, each with an analog microphone input and an analog earpiece output (see block diagram below). To suit several types of equipment, there are six audio modes available which can be selected with the AT^SNFS command. The electrical characteristics of the voiceband part vary with the audio mode. For example, sending and receiving amplification, sidetone paths, noise suppression etc.
TC35 / TC37 Hardware Interface Description 3.6.1 Speech processing The voiceband filter includes a digital interpolation low-pass filter for received voiceband signals with digital noise shaping and a digital decimation low-pass filter for voiceband signals to be transmitted. After voiceband (interpolation) filtering the resulting 2Mbit/s data stream is digital-to-analog converted and amplified by a programmable gain stage in the voiceband processing part.
TC35 / TC37 Hardware Interface Description 3.7 SIM interface The baseband processor has an integrated SIM interface compatible with the ISO 7816-3 IC Card standard. This is wired to the host interface (ZIF connector) in order to be adapted to an external SIM card holder. Six pins on the ZIF connector are reserved for the SIM interface. Further to the five wire SIM interface according to GSM 11.11, the CCIN pin has been added.
TC35 / TC37 Hardware Interface Description 3.7.2 Design considerations for SIM card holder The schematic below is a sample configuration that illustrates the Molex SIM card holder located on the DSB35 Support Box (evaluation kit used for type approval of the Siemens TC35/TC37 reference setup, see /4/ for technical details). X1201 is the designation used for the SIM card holder in /4/.
TC35 / TC37 Hardware Interface Description 3.7.3 Grounding the SIM interface To ground the SIM interface you can proceed from several approaches, depending on your individual application design. The following information is just one of several options you can apply: Potential equalization can best be achieved by applying a separate ground for the SIM interface.
TC35 / TC37 Hardware Interface Description 3.8 Control signals The following control signals are available (2.65V CMOS level). 3.8.
TC35 / TC37 Hardware Interface Description 3.8.2 Outputs 3.8.2.1 Synchronization signal The synchronization signal serves to indicate growing power consumption during the transmit burst. The signal is generated by the SYNC pin (pin number 32). Please note that this pin can adopt two different operating modes which you can select by using the AT^SSYNC command (mode 0 and 1). For details refer to the "AT Command Set".
TC35 / TC37 Hardware Interface Description 3.8.2.2 Using the SYNC pin to control a status LED As an alternative to generating the synchronization signal, the SYNC pin can be used to control a status LED on your application platform. To avail of this feature you need to set the SYNC pin to mode 1 by using the AT^SSYNC command. For details see the "AT Command Set".
TC35 / TC37 Hardware Interface Description 3.8.2.3 Behaviour of the RING0 line The behaviour of the /RING0 line depends on the type of the call received. • When a voice call comes in the /RING0 line goes low for 1s and high for another 4s. Every 5 seconds the ring string is generated and sent over the RXD0 line.
TC35 / TC37 Hardware Interface Description 3.9 Pin assignment Please note that the reference voltages listed below are the values measured directly on the TC35 or TC37 module. They do not apply to the accessories connected. Table 18: Pin assignment Function Signal Name Pin No. I/O Signal Level Power supply VBATT+ 1 I/(O) Input: Usage is mandatory 2 Vin = 3.3V...5.5V 3 Imax ≤ 2.
TC35 / TC37 Hardware Interface Description Function Signal Name Pin No. I/O Signal Level Comment Ignition /IGT 15 I IDLE/ TALK/ Power-Down mode: Usage is mandatory Vout = 2.3V Rout ≈ 220kΩ Vlow,max = 0.45V @ Iout = 10µA tlow ≥ 100ms (see Chapter 3.3!) Open drain/collector driver is required to pull down this pin to power on the GSM Engine Signal: falling edge and hold for tlow RS232 DSR0 16 O IDLE/ TALK mode: /RING0 17 O Output: RxD0 18 O TxD0 19 I Rout ≈ 1kΩ Vout,low,max = 0.
TC35 / TC37 Hardware Interface Description Function Signal Name Pin No. I/O Signal Level Comment SIM CCIN 24 I IDLE / TALK mode: SIM contact (active high) RPD = 100kΩ (internal Pull Down resistor to GND) Ri ≈ 10kΩ Vin,low,max = 0.4V Vin,high,min = 2.15V, Vi,h,max = 3.3V All signals of the SIM interface are protected from electrostatic discharge by using spark gaps to GND and clamp diodes to 2.
TC35 / TC37 Hardware Interface Description Function Signal Name Pin No. I/O Signal Level Comment RTC backup VDDLP 30 O IDLE/TALK/Power Down mode if VBATT+ connected: Vout = VBATT+ - 0.6V Iout,max = 100mA If unused keep pin open. See also chapter 3.3.4. I PD mode if VBATT+ disconnected: Vin = 2.0V...5.5V Iin,max = 30µA tRTC,on ≈ 30s @ 100µF (typically) I/O IDLE/ TALK mode: Power down /PD 31 If unused keep pin open Input: For emergency only! Ri = 1kΩ; Vin,low,max = 0.45V @ I = 0.
TC35 / TC37 Hardware Interface Description Function Signal Name Pin No. I/O Signal Level Comment Audio Interface EPP2 33 O EPN2 34 O Ri = 15Ω, (30kΩ if not active) Vomax = 3.7Vpp, no load, @ 3.14 dBm0: f = 1024Hz, audio mode = 6, outBbcGain = 0, outCalibrate = 16384 If unused keep pin open EPP1 35 O EPN1 36 O Ri = 15Ω, (30kΩ if not active) Vomax = 3.7Vpp, no load, @ 3.
TC35 / TC37 Hardware Interface Description 4 Radio interface The RF part of TC35 and TC37 is based on the Transceiver Chip SMARTi. The transceiver consists of a heterodyne receiver part, an upconversion modulation loop transmitter, a RF PLL and fully integrated IF synthesizer. 4.
TC35 / TC37 Hardware Interface Description 4.3 Antenna interface (antenna reference point – ARP) There are no special antenna systems specified for TC35 and TC37. All RF interfaces (connectors or pad) have an impedance of 50Ω with an SWR ≤2. TC35 and TC37 are capable of sustaining a total mismatch at the antenna connector or pad when transmitting with power control level for maximum RF Power.
TC35 / TC37 Hardware Interface Description 4.3.
TC35 / TC37 Hardware Interface Description 5 Physical characteristics 5.1 Exploded diagram and PCBs Figure 24 shows the PCBs of TC35 and TC37. The exploded assembly drawing applies to both modules. Shielding cover baseband Shielding frame baseband PCB including ZIF connector and antenna connector TC35 baseband side TC35 RF side Shielding frame RF Shielding cover RF TC37 baseband side TC37 RF side Figure 24: Exploded diagram and PCBs of TC35/TC37 TC35_37_HD_02_V03.
TC35 / TC37 Hardware Interface Description 5.2 Mechanical dimensions of TC35 and TC37 Figure 25 shows the RF part of TC35 and TC37 and provides an overview of the board's mechanical dimensions. For further details see Figure 26. Size: Weight: 54.5+0.2 x 36+0.2 x 6.85+0.35 mm (height of antenna connector not considered) approx. 18g Figure 25: TC35 / TC37 – view of RF part TC35_37_HD_02_V03.10 - Released Page 60 of 92 21.12.
TC35 / TC37 Hardware Interface Description 0,00 = Reference point All dimensions stated in millimeter Figure 26: Mechanical dimensions of TC35 TC35_37_HD_02_V03.10 - Released Page 61 of 92 21.12.
TC35 / TC37 Hardware Interface Description 0,00 = Reference point All dimensions stated in millimeter Figure 27: Mechanical dimensions of TC37 TC35_37_HD_02_V03.10 - Released Page 62 of 92 21.12.
TC35 / TC37 Hardware Interface Description 5.3 Mounting TC35/TC37 onto the application platform For the cellular application to operate reliably it is essential that the GSM engine is securely attached to the host housing. The TC35/TC37 board provides three mounting holes. To properly mount it to the host device you can use M1.6 or M1.8 screws plus suitable washers. The maximum diameter of the screw head incl. the washer must not exceed 4 mm.
TC35 / TC37 Hardware Interface Description 5.3.2 Mounting TC37 Caution: The antenna pad of TC37 is located close to the mounting hole. If you connect your antenna to the pad only insert an insulated (nylon) screw, or rather leave the hole open while using a clamp or clip to secure TC37 onto the host device.
TC35 / TC37 Hardware Interface Description 5.3.3 Positioning labels on TC35 and TC37 The product label is divided into two sections which are identical in content. The upper label can be placed on the customer application. The second label is positioned on the shielding cover of the RF part as shown below. Figure 30: Positioning labels Figure 31: Label dimensions TC35_37_HD_02_V03.10 - Released Page 65 of 92 21.12.
TC35 / TC37 Hardware Interface Description Figure 32: Content of TC35 label TC35_37_HD_02_V03.10 - Released Page 66 of 92 21.12.
TC35 / TC37 Hardware Interface Description 5.4 ZIF connector This chapter provides specifications and handling instructions for the 40-pin ZIF connector and the Flat Flexible Cable (FFC) used to connect the GSM engine to the host application. The ZIF (zero insertion force) design allows to easily fasten or remove the cable without the need for special tools. Simply insert the FFC cable into the open socket without using any pressure.
TC35 / TC37 Hardware Interface Description 5.4.1 Mechanical dimensions of the ZIF connector Figure 33: Mechanical dimensions of ZIF connector Figure 34: PCB ZIF connector TC35_37_HD_02_V03.10 - Released Page 68 of 92 21.12.
TC35 / TC37 Hardware Interface Description 5.5 Antenna design As stated earlier, TC35 and TC37 are distinguished by the various options of connecting the antenna. This chapter provides technical specifications and ordering information for each solution. Note: Be sure that all peripherals are applied according to the manufacturer's antenna specifications. For internal antenna equipment you are advised to use the services of a consultant or full-service house.
TC35 / TC37 Hardware Interface Description Item Specification Material and finish Material: Copper alloy Copper alloy Engineering plastic • Center contact: • Outer contact: • Insulator: Finish: Gold plated Silver plated None Figure 35: Mechanical dimensions of MuRata GSC connector (in mm) TC35_37_HD_02_V03.10 - Released Page 70 of 92 21.12.
TC35 / TC37 Hardware Interface Description Table 24: Stress characteristics of the GSC antenna connector Parameter Specification Connector durability 100 cycles of mating and withdrawal with a jig at 12 cycles/minute maximum Engage force 30N max Disengage force 3N min, 30N max Angle of engagement 15 degree max Mechanical stress to connector See Figure 36 for details A and B: 4.9N max. C: 2.94N max and D: 1.96N max E: 4.
TC35 / TC37 Hardware Interface Description 5.5.2 Using antenna eqipment from other manufacturers For your product to meet individual design or technical requirements, you may decide to choose antenna equipment from suppliers other than MuRata. When selecting a suitable antenna your considerations should also include the requirements of electromechanical valence. To achieve best performance it is essential to minimize the valence potential delta levels of dissimilar metal mating surfaces.
TC35 / TC37 Hardware Interface Description 5.5.3 Antenna pad and coaxicon connector on TC37 TC37 comes with a gold plate antenna pad and a coaxicon switching connector. Both options can be used alternatively as described in Chapter 4.3. Figure 38: Dimensions and position of coaxicon connector and antenna pad on TC37 Coaxicon switching connector The coaxicon switching connector used on TC37 is made by AMP.
TC35 / TC37 Hardware Interface Description 6 Electrical, temperature and radio characteristics 6.1 Absolute maximum ratings Absolute maximum ratings for supply voltage and voltages on digital and analog pins of TC35 and TC37 are listed in Table 26. Exceeding these values will cause permanent damage to the GSM Engine. The supply current must be limited accordingly.
TC35 / TC37 Hardware Interface Description 6.4 Power supply ratings Table 29: Power supply ratings Parameter Description Conditions Min Typ Max Unit VBATT+ Reference point on VBATT+ contact pad 3.3 4.2 5.5 V 400 mV Supply voltage Voltage must stay within the min/max values, including voltage drop, ripple, spikes.
TC35 / TC37 Hardware Interface Description 6.4.2 Current consumption during transmit burst The diagrams in Figure 39 through Figure 40 illustrate the peak current consumption of the application caused during a transmit burst. The peak current is shown vs. the power level for GSM900/1800 and vs. the return loss of the antenna. All measurements have been performed at 25°C and 4.2V (reference points used on module: test points on ZIF connector). Changing the conditions, e.g.
TC35 / TC37 Hardware Interface Description Table 30: Power control levels GSM 900, power class 4 Power control level Transmitter output power Tolerances according to GSM 05.
TC35 / TC37 Hardware Interface Description The figures below show the typical peak current in dependency of load mismatch during a transmit burst with the power control level for maximum RF power. To achieve optimum performance the return loss of the customer application should be better than 10dB. peak current / A Typical current consumption GSM900 vs.
TC35 / TC37 Hardware Interface Description The values for current and return loss listed below refer to Figure 41 and Figure 42. Table 32: GSM 900, power level 5 Typ Return loss VSWR (approx.) 1600 mA 20 dB 1.20 1800 mA 11 dB 1.75 2000 mA *) 3.00 2300 mA 6 dB 2.5 dB **) 9.00 Table 33: GSM 1800, power level 0 Typ Return loss VSWR (approx.) 1200 mA 20 dB 1.20 1300 mA 11 dB 1.75 1400 mA 6 dB *) 3.00 1500 mA 2.5 dB **) 9.
TC35 / TC37 Hardware Interface Description 6.5 Electrical characteristics of the voiceband part 6.5.1 Setting audio parameters by AT commands Each audio mode is assigned a separate set of parameters. The audio modes 2 to 6 can be adjusted according to the parameters listed below. Audio mode 1 is the default configuration which cannot be modified. Table 34: Audio parameters adjustable by AT command Parameter Influence to Range Gain range Calculation inBbcGain MICP/MICN analogue amplifier gain 0...
TC35 / TC37 Hardware Interface Description 6.5.2 Characteristics of audio modes The electrical characteristics of the voiceband part depend on the current audio mode set with the AT^SNFS command. Table 35: Voiceband characteristics (typical), all values preliminary Audio mode no.
TC35 / TC37 Hardware Interface Description Note: With regard to acoustic shock, the cellular application must be designed to avoid sending false AT commands that might increase amplification, e.g. for a high sensitive earpiece. A protection circuit should be implemented in the cellular application. 6.5.3 Voiceband receive path The values specified below were tested to 1kHz and 0dB gain stage, unless otherwise stated.
TC35 / TC37 Hardware Interface Description 6.5.4 Voiceband transmit path The values specified below were tested to 1kHz and 0dB gain stage, unless otherwise stated. Audio mode = 5 for MICP1 to MICN1 and 6 for MICP2 to MICN2, inBbcGain= 0, inCalibrate = 32767, outBbcGain = 0, OutCalibrate = 16384, sideTone = 0 Table 37: Voiceband transmit path Parameter Min Typ Input voltage (peak to peak) Max Unit 1.
TC35 / TC37 Hardware Interface Description 6.
TC35 / TC37 Hardware Interface Description 6.7 Electrostatic discharge The GSM engine is not protected against Electrostatic Discharge (ESD) in general. Consequently, it is subject to ESD handling precautions that typically apply to ESD sensitive components. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any application that incorporates a TC35 or TC37 module.
TC35 / TC37 Hardware Interface Description 7 Updating Firmware The TC35 firmware is stored in a Flash memory. This gives you the flexibility to easily upgrade to the latest firmware releases. The firmware is supplied as a Windows executable that can be downloaded onto the GSM engine using the serial interface of its ZIF connector or the SIM interface. To meet the requirements of various application platforms there are a number of ways to perform the update.
TC35 / TC37 Hardware Interface Description 8 Reference Approval 8.1 Reference Equipment The Siemens TC35 and TC37 GSM engines have been approved for reference configurations that satisfy all the requirements of GSM Phase 2/2+ (CTR 31, CTR 32).
TC35 / TC37 Hardware Interface Description 8.2 CE Conformity TC35 and TC37 meet the requirements of EU directives listed below and is labeled with the CE conformity mark. - R&TTE Directive 1999/5/EG - LVD 73/23/EEC - EMC conformity in accordance with Directive 89/336/EEC 8.3 G.C.F. Conformity TC35 and TC37 have been approved to comply with the quality assurance requirements according to GCF-CCV and CCR, v. 3.4.1 TC35_37_HD_02_V03.10 - Released Page 88 of 92 21.12.
TC35 / TC37 Hardware Interface Description 9 APPENDIX: List of parts and accessories Table 40: List of accessories Description Supplier Ordering information TC35 engine Siemens Siemens ordering number L36880-N8100-A100 TC37 engine Siemens Siemens ordering number L36880-N8150-A200 SIM card holder incl. push button ejector and slide-in tray Molex Ordering numbers: 91228 91236 Molex Deutschland GmbH Felix-Wankel-Str.
TC35 / TC37 Hardware Interface Description Description Coaxicon switching (TC37 only) Supplier Ordering information connector AMP / 619028-1 Tyco Electronics Battery cell P/N "CGP34506 Panasonic" Shenzhen XWODA electronic Co., Ltd To place orders or obtain more information please contact: Mr. Wang Ming Wang Phone: +86 755 7619731 Fax: +86 755 7608078 Email: xwda@xwda.com.cn Handset Votronic HH-SI-30.3/V1.
Ordering information for special accessories TC35 / TC37 Hardware Interface Description TC35_37_HD_02_V03.10 - Released Page 91 of 92 21.12.
Ordering information for special accessories TC35 / TC37 Hardware Interface Description TC35_37_HD_02_V03.10 - Released Page 92 of 92 21.12.
