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Document overview
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- PDF pages: 37
Technical content
Datasheet sections
- 0 Document history
- 1 Introduction
- 1.1 References
- 1.2 Standards
- 1.3 Safety precautions
- 1.4 Terms and abbreviations
- 2 Key features of TC35i Terminal
- 3 Interface description
- 3.1 Overview
- 3.2 Block diagram of a GSM application
- 3.3 The TC35i GSM engine
- 3.4 Operating modes
- 3.5 Terminal circuit
- 3.5.1 Power supply and On/Off control
- 3.5.1.1 Maximum number of turn/on & turn/off cycles
- 3.5.2 RTC
- 3.6 Upgrading TC35i Terminal firmware
- 3.6.1 RS-232 interface
- 3.6.2 Audio interface
- 3.6.3 Radio interface
- 3.6.4 SIM interface
- 3.6.5 Status LED
- 4.1 Attaching the terminal
- 5 Electrical and environmental characteristics
- 6 Full type approval
- 6.1 Restrictions
- 6.2 CE Conformity
- 6.3 EMC
- 7 List of parts and recommended accessories
Description
Version: 01.05 DocID: TC35i T HD v01.05
TC35i Terminal Hardware Interface Description Confidential / Released TC35i_T_HD_v01.05 Page 2/37 10.07.2003 Document Name: TC35i Terminal Hardware Interface Description Version: 01.05 Date: 10.07.2003 DocId: TC35i_T_HD_v01.05 Status: Confidential / Released General notes Product is deemed accepted by Recipient and is provided without interface to Recipient´s products. The Product constitutes pre-release version and code and may be changed substantially before commercial release. The Product is provided on an as is basis only and may contain deficiencies or inadequacies. The Product is provided without warranty of any kind, express or implied. To the maximum extent permitted by applicable law, Siemens further disclaims all warranties, including without limitation any implied warranties of merchantability, fitness for a particular purpose and noninfringement of third-party rights. The entire risk arising out of the use or performance of the Product and documentation remains with Recipient. This Product is not intended for use in life support appliances, devices or systems where a malfunction of the product can reasonably be expected to result in personal injury. Applications incorporating the described product must be designed to be in accordance with the technical specifications provided in these guidelines. Failure to comply with any of the required procedures can result in malfunctions or serious discrepancies in results. Furthermore, all safety instructions regarding the use of mobile technical systems, including GSM products, which also apply to cellular phones must be followed. Siemens AG customers using or selling this product for use in any applications do so at their own risk and agree to fully indemnify Siemens for any damages resulting from illegal use or resale .To the maximum extent permitted by applicable law, in no event shall Siemens or its suppliers be liable for any c onsequential, incidental, direct, indirect, punitive or other damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information or data, or other pecuniary loss) arising out the use of or inability to use the Product, even if Siemens has been advised of the possibility of such damages. Subject to change without notice at any time. Copyright notice Transmittal, reproduction, dissemination and/or editing of this document as well as utilization of its contents and communication thereof to others without express authorization are prohibited. Offenders will be held liable for payment of damages. All rights created by patent grant or registration of a utility model or design patent are reserved. Copyright © Siemens AG 2003 Trademark notice MS Windows/g226 is a registered trademark of Microsoft Corporation.
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0 Document history
Preceding document: "TC35i Terminal Hardware Interface Description" Version 00.40 New document: "TC35i Terminal Hardware Interface Description" Version 01.05 Chapter Page What is new 0 6 Added Application Note 24: Application Developers Guide 1.2, 7 6, 37 TC35i Terminal now fully type approved and labeled with CE mark
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1 Introduction
This document describes the hardware of the Siemens TC35i Terminal. The information are intended for users, developers or manufacturers who design and build cellular applications beyond the standard setup. The scope of this document includes interface specifications, electrical issues and mechanical characterist ics of TC35i Terminal. It specifies standards pertaining to wireless applications and outlines requirements that must be adhered to for successful product design. The TC35i Terminal is a compact GSM modem for the transfer of data, voice, SMS and faxes in GSM networks. Industrial standard interfaces and an integrated SIM card reader allow using TC35i Terminal easily as a dual band GSM terminal. The functionality of the Terminal corresponds to the features of the TC35i module.
1.1 References
[1] TC35i AT Command Set for TC35i and TC35i Terminal, Version 01.05 [2] Release Note, Version 01.05 [3] Application Note 16: Upgrading TC35i Terminal firmware [4] Application Note 02: Audio Interface Design [5] Application Note 24: Application Developers Guide [6] Remote Sat Users Guide [7] Multiplexer Users Guide [8] Multiplexer Driver Developers Guide for Windows 2000 and Windows XP [9] Multiplexer Driver Installation Guide for Windows 2000 and Windows XP Prior to using the GSM engine, be sure to carefully read and understand the latest product information provided in the Release Notes. To visit the Siemens Website you can use the following link: http://www.siemens.com/wm
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1.2 Standards
TC35i Terminal has been approved to comply with the directives and standards listed below and is labeled with the CE conformity mark. Directives 99/05/EC Directive of the European Parliament and of the council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual recognition of their conformity, in short referred to as R&TTE Directive 1999/5/EC 89/336/EC Directive on electromagnetic compatibility 73/23/EC Directive on electrical equipment designed for use within certain voltage limits (Low Voltage Directive) 95/54/EC Automotive EMC Directive Standards of type approval ETS 300 607-1 Digital cellular telecommunications system (Phase 2); Mobile Station (MS) conformance specification; (equal GSM 11.10-1=>equal 3GPP TS 51.010-1) EN 301 511 V7.0.1 (2000-12) Candidate Harmonized European Standard (Telecommunications series) Global System for Mobile communications (GSM); Harmonized standard for mobile stations in the GSM 900 and DCS 1800 bands covering essential requirements under article 3.2 of the R&TTE directive (1999/5/EC) (GSM 13.11 version 7.0.1 Release 1998) EN 301 489-7 V1.1.1 (2000-09) Candidate Harmonized European Standard (Telecommunications series) Electro Magnetic Compatibility and Radio spectrum Matters (ERM); Electro Magnetic Compatibility (EMC) standard for radio equipment and services; Part 7: Specific conditions for mobile and portable radio and ancillary equipment of digital cellular radio telecommunications systems (GSM and DCS) EN 60 950 Safety of information technology equipment (2000) Requirements of quality IEC 60068 Environmental testing DIN EN 60529 IP codes
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1.3 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 TC35i Terminal. 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. Failure to comply with these precautions violates safety standards of design, manufacture and intended use of the product. Siemens AG assumes no liability for customer failure to comply with these precautions. When in a hospital or other health care facility, observe the restrictions on the use of mobiles. Switch the cellular terminal or mobile off, if instructed to do so by the guidelines posted in sensitive areas. Medical equipment may be sensitive to RF energy. The operation of cardiac pacemakers, other implanted medical equipment and hearing aids can be affected by interference from cellular terminals or mobiles placed close to the device. If in doubt about potential danger, contact the physician or the manufacturer of the device to verify that the equipment is properly shielded. Pacemaker patients are advised to keep their hand-held mobile away from the pacemaker, while it is on. Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it cannot be switched on inadvertently. The operation of wireless appliances in an aircraft is forbidden to prevent interference with communications systems. Failure to observe these instructions may lead to the suspension or denial of cellular services to the offender, legal action, or both. Do not operate the cellular terminal or mobile in the presence of flammable gases or fumes. Switch off the cellular terminal when you are near petrol stations, fuel depots, chemical plants or where blasting operations are in progress. Operation of any electrical equipment in potentially explosive atmospheres can constitute a safety hazard. Your cellular terminal or mobile receives and transmits radio frequency energy while switched on. Remember that interference can occur if it is used close to TV sets, radios, computers or inadequately shielded equipment. Follow any special regulations and always switch off the cellular terminal or mobile wherever forbidden, or when you suspect that it may cause interference or danger. 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 handsfree operation. Before making a call with a hand-held terminal or mobile, park the vehicle. Handsfree devices must be installed by qualified personnel. Faulty installation or operation can constitute a safety hazard.
TC35i Terminal Hardware Interface Description Confidential / Released TC35i_T_HD_v01.05 Page 9/37 10.07.2003 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. Some networks do not allow for emergency calls if certain network services or phone features are in use (e.g. lock functions, fixed dialling etc.). You may need to deactivate those features before you can make an emergency call. Some networks require that a valid SIM card be properly inserted in the cellular terminal or mobile. If a power supply unit is used to supply the device, it must meet the demands placed on SELV circuits in accordance with EN60950. The maximum permissible connection length between the device and the supply source should not exceed 3m. According to the guidelines for human exposure to radio frequency energy, an antenna connected to the FME jack of the device should be placed at least 20cm away from human bodies.
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1.4 Terms and abbreviations
Table 1: Terms and abbreviations Abbreviation Description ADC Analog-to-Digital Converter ARP Antenna Reference Point ATC AT Cellular BTS Base Transceiver Station CB Cell Broadcast CODEC Coder-Decoder CPU Central Processing Unit DCE Data Circuit terminating Equipment DSB Development Support Box DSP Digital Signal Processor DSR Data Set Ready DTR Data Terminal Ready EFR Enhanced Full Rate EGSM Enhanced GSM EMC Electromagnetic Compatibility ESD Electrostatic Discharge ETS European Telecommunication Standard FDMA Frequency Division Multiple Access FR Full rate G.C.F. GSM Conformity Forum GSM Global Standard for Mobile Communication HF Hands-free HR Half rate HW Hardware IC Integrated Circuit IF Intermediate Frequency IMEI International Mobile Equipment Identifier I/O Input/ Output IGT Ignition ISO International Standards Organization ITU International Telecommunications Union kbps kbits per second
TC35i Terminal Hardware Interface Description Confidential / Released TC35i_T_HD_v01.05 Page 11/37 10.07.2003 Abbreviation Description Li-Ion Lithium-Ion LVD Low voltage Directive Mbps Mbits per second MMI Machine Machine Interface MO Mobile Originated MS Mobile Station MT Mobile Terminated NC Not Connected NTC Negative Temperature Coefficient PA Power Amplifier PCB Printed Circuit Board PCM Pulse Code Modulation PCS Personal Communication System PD Power Down PDU Protocol Data Unit R&TTE Radio and Telecommunication Terminal Equipment RAM Random Access Memory RF Radio frequency RI Ring Indication ROM Read Only Memory RX Receive direction SIM Subscriber Identification Module SMS Short Message Service SRAM Static Random Access Memory SW Software TBD To Be Defined TDD Time Division Duplex TDMA Time Division Multiple Access TX Transmit direction UART Universal Asynchronous Receiver and Transmitter VAD Voice Activity Detection ZIF Zero Insertion Force
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2 Key features of TC35i Terminal
Table 2: Key features Feature Implementation Transmission Voice, Data, SMS, Fax Power supply Single supply voltage 8V to 30V GSM class Small MS Frequency bands /g183/g32Dual Band E-GSM 900 and GSM 1800 /g183/g32Compliant to GSM Phase 2/2+ Transmit power /g183/g32Class 4 (2W) for EGSM900 /g183/g32Class 1 (1W) for GSM1800 SIM card reader Internal External antenna Connected via antenna FME connector Speech codec Triple rate codec: /g183/g32Half Rate (ETS 06.20) /g183/g32Full Rate (ETS 06.10) /g183/g32Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80) SMS MT, MO, CB, Text and PDU mode Unstructured Supplementary Services Data (USSD) support FAX Group 3: Class 1, Class 2 Audio interface Analog (Microphone, Earpiece) Serial interface /g183/g322.65V level, bi-directional bus for AT commands and data /g183/g32Multiplex ability according to GSM 07.10 Multiplexer protocol /g183/g32Baud rates from 300bps to 115.200bps 38.400, 57.600 and 115.200bps Supported SIM card 3V Phonebook management Supported phonebook types: SM, FD, LD, MC, RC, ON, ME Reset of TC35i Terminal Reset via AT command or Power Down Signal Firmware upgrade Upgradable via serial interface or SIM interface. Real time clock Implemented (clock frequency 32.768kHz) Environmental Temperature: /g183/g32Normal operation: -20°C to +55°C to +65°C /g183/g32Humidity: max. 80 % relative humidity Size 65x74x33 mm (approx.) Weight 130g
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3 Interface description
3.1 Overview
TC35i Terminal provides the following connectors for power supply, interfacing and antenna: /g183/g326-pole Western plug (female) for power supply, ignition, power down signal /g183/g324-pole Western plug (female) for audio accessory, such as a handset /g183/g329-pole (female) SUB-D plug for RS-232 serial interface /g183/g32FME Jack (male) for antenna (Radio Interface) /g183/g32SIM card holder RS-232 interface Radio interface Power supplyStatus LED Audio interface SIM card holder
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3.2 Block diagram of a GSM application
Figure 1 shows a block diagram of a sample configuration that incorporates a TC35i Terminal and typical accessories. Host controller Power supply RF interface RS-232 interface Power supply on/off Audio interface Handset Antenna Terminal- circuit FFC Module interface GSM Engine TC35i GSM Terminal TC35i T LED Customer application Air reference point (ARP) Data sink/ source Fuse IGT_IN PD_IN Figure 1: Block diagram of a TC35i Terminal application (example)
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3.3 The TC35i GSM engine
The TC35i GSM engine is a major functional component of the TC35i Terminal that handles all the processing for audio, signal and data within a GSM cellular device. Internal software runs the application interface and the whole GSM protocol stack. A UART forms the interface to the Terminal Circuit. A GSM baseband processor contains all analog and digital functionality of a cellular radio. Designed to meet the increasing demands of the GSM/PCS cellular subscriber market, it supports FR, HR and EFR speech and channel coding without the need for external hardware. The RF part of the GSM engine TC35i is based on a highly integrated single transceiver chip solution. The internal antenna cable connects to the connector type GSC from Murata with a 50 Ω impedance. This GSC connector is the ARP (Antenna Reference Point) for type approval measurements as well as for electrical characteristics. Figure 2: TC35i GSM engine
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3.4 Operating modes
The table below briefly summarizes the various operating modes referred to in the following chapters. Table 3: Overview of operating modes Mode Function SLEEP Various power saving modes set by AT+CFUN command. Software is active to minimum extent. If the Terminal was registered to the GSM network in IDLE mode, it remains, in SLEEP mode, registered and pageable from the BTS. Power saving can be chosen at different levels. The NON-CYCLIC SLEEP mode (AT+CFUN=0) disables the AT interface. The CYCLIC SLEEP mode AT+CFUN=5, 6, 7 and 8 alternatingly activate and deactivate the AT interface to allow permanent access to all AT commands. IDLE Software is active. Once registered to the GSM network, paging with BTS is carried out. The Terminal is ready to send and receive. Normal operation TALK Connection between two subscribers is in progress. Power consumption depends on network coverage individual settings, such as DTX off/on, FR/EFR/HR, hopping sequences, antenna. 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.
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3.5 Terminal circuit
ZIF connector (40 pole) FFC EMC (RS-232) RS-232 driver D-Sub 9 pin LED driver GSM status EMC (Audio) EMC (Power) Overvoltage protectionRegulator Power on/off logic IGT_IN (Ignition) /IGT (Ignition) Power on/off BATT+ (Main supply) Fuse SIM card interface EP1 MIC1 SYNC CCxxx 2V9 DC Power Power supply Western jack (6 pin) Western jack (4 pin) FME
50 Ohm
EMC (on(off) RS-232 interface /RXD0, /TXD0, /RTS0, /CTS0, /DTR0, /DSR0, /DCD0, /RING0 GSC (Antenna reference point) PD_IN (Power down) /EMERGOFF Microphone supplyVPP VPP 2V9 VDDLP (Power down supply) 2V9 RF cable GSM Engine TC35i LED SIM RS-232 interface Audio ON/OFF logic Power supply Radio interface Terminal circuit Audio GSM interface RF interface Voltage limiter DTR 2V9 Figure 3: TC35i Terminal circuit block diagram
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3.5.1 Power supply and On/Off control
The power supply of the TC35i Terminal has to be a single voltage source of VPLUS=8V 30V providing a peak current (pulsed 577ms at T=4.615ms) of about 1.1A at 12V during the active transmission. The uplink burst causes strong ripple (drop) on the power lines. The drop voltage should not exceed 1V, but the absolute minimum voltage during drops must be >7.6V. The terminal is protected from supply voltage reversal and overvoltage. An internal fuse is not removable and intended for electrical safety according to EN60950. To protect the device from high voltages (>30V) an additional 1.25A quick-break fuse on Pin 1 of the 6-pole Western plug shall be used. In case you wish to use TC35i Terminal with power packs and batteries observe the EN60950 guidelines. A switching regulator regulates the input voltage for the internal supply. In POWER DOWN mode the switching regulator is turned off by the On/Off logic. A separate voltage regulator supplies the real time clock in the GSM engine. When power fails for >1ms, TC35i Terminal resets or switches off and for >7s the RTC will be reset. Pin assignment: 2 free 5 free
1 PLUS
3 PD_IN
4 IGT_IN
6 GND
Figure 4: Female 6-pole Western plug for power supply, ignition, power down Mains adapter: It is recommended to use the adapter of the type approval reference configuration. Ordering information can be found in Chapter 7. This 12V mains adapter comes with a 6-pole Western plug and features an internal connection between IGT_IN pin and PLUS pin for auto ignition (power up).
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4 IGT_IN Ignition *) UIH >5V
Ignition > 5V for more than 200ms switches the terminal on 5 free --- ---
6 GND Ground 0V
*) The ignition is activated only by a rising edge. The rise time is <20ms. The IGT_IN signal switches the terminal on (it changes from power down state to the net searching state). Note : /g183/g32Power off exception handling: In the event of software hang-ups etc. the TC35i Terminal can be switched off by applying a voltage >5V to pin 3 (PD_IN) for more than 3.5s. To switch on again you have two options: Activate the ignition pin (IGT_IN pin 4) or switch on the RS-232 DTR line, during /PD_IN not active (pin 3 voltage <2V). The /PD_IN signal switches the terminal off. All internal supply voltages are off, except for the power down voltage, which still feeds the real-time clock (RTC). See Chapter 3.5.2 for use of the RTC. /g183/g32For all other operating modes the /PD_IN signal must be low (<2V). /g183/g32When the TC35i Terminal is switched off or enters the Power Down mode, e.g. after you have issued the AT^SMSO command or activated the /PD_IN signal, all RS-232 interface lines are undefined during internal power shutdown process. This may cause undefined characters which can be ignored. /g183/g32In order to properly shut down the TC35i Terminal be sure to wait 10s after sending AT^SMSO before switching off the power supply at pin PLUS. This time is needed for the module to safely log off from the network and finish saving to the internal memory. Caution: Use the /PD_IN pin only when, due to serious problems, the software is not responding for more than 5 seconds. Pulling the /PD pin causes the loss of all information stored in the volatile memory since power is cut off immediately. Therefore, this procedure is intended only for use in case of emergency, e.g. if TC35i Terminal fails to shut down properly.
3.5.1.1 Maximum number of turn/on & turn/off cycles
Each time the TC35i Terminal is shut down, data will be written from the volatile memory to flash memory. The guaranteed maximum number of write cycles is limited to 100.000.
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3.5.2 RTC
The internal Real Time Clock (RTC) of TC35i Terminal is supplied from a dedicated voltage regulator which is also active when TC35i Terminal is in POWER DOWN mode. The RTC retains the time and is necessary for the reminder function (even if TC35i Terminal is disconnected from power supply, see Table 11 for details). For example, you can set an alarm by using the AT+CALA command. Once the alarm time is reached, a reminder URC will be returned. See [1] for detailed instructions on use of the command AT+CALA. Please note that the alarm mode described in [1] is not intended for TC35i Terminal. It is not recommended to power down TC35i Terminal after setting an alarm, because an alarm call does not wake up TC35i Terminal from POWER DOWN mode.
3.6 Upgrading TC35i Te rminal firmware
The TC35i Terminal firmware can be easily upgraded to the latest firmware releases. The terminal offers two different solutions for updating firmware. In most cases, you can update the firmware via the RS-232 interface. In case you wish to use the SIM interface you will need to purchase a special adapter named BB35 Bootbox. Ordering information can be found in Chapter 7. The latest software releases can be obtained from your local Siemens dealer or visit the Siemens homepage.
3.6.1 RS-232 interface
Via RS-232 interface, the host controller controls the TC35i Terminal and transports data. Figure 5: Pin assignment RS-232 (D-Sub 9-pole female) EMC immunity complies with the vehicular environment requirements according to EN 301 489-7. 5 4 3 2 1
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5 GND - Ground
The current of all signals is limited by serial resistors: Outputs: 470 Ohm Inputs: 1kOhm TC35i Terminal is designed for use as a DCE. Based on the conventions for DCE-DTE connections it communicates with the customer application (DTE) using the following signals: /g183/g32Port TxD @ application sends data to TXD of TC35i Terminal /g183/g32Port RxD @ application receives data from RXD of TC35i Terminal The RS-232 interface is implemented as a serial asynchronous transmitter and receiver conforming to ITU-T V.24 Interchange Circuits DCE. It is configured for 8 data bits, no parity and 1 stop bit, and can be operated at bit rates from 300bps to 115kbps. Autobauding supports bit rates from 4.8kbps to 115kbps. Hardware handshake using the /RTS and /CTS signals and XON/XOFF software flow control are supported. In addition, the modem control signals /DTR *), /DSR, /DCD and /RING are available. The modem control signal RING (Ring Indication) can be used to indicate, to the cellular device application, that a call or Unsolicited Result Code (URC) is received. There are different modes of operation, which can be set with AT commands. *) The /DTR signal will only be polled on ce per second from the internal firmware of TC35i.
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3.6.2 Audio interface
The audio interface provides an analog input for a microphone and an analog output for an earpiece. /g183/g32The microphone input and the earpiece output are balanced. /g183/g32For electret microphones a supply source is implemented. /g183/g32The microphone supply characteristics are optimized for the recommended Votronic handset. For ordering Information see Chapter 7. /g183/g32This handset has been used as the reference handset for type approval. An extra approval must be obtained for integrating other handsets or amplifiers. The amplification of sending direction, receiving direction and sidetone depend on the current audio mode. EMC immunity complies with the vehicular environment requirements according to EN 301 489-7. Figure 6: Audio Western plug (4-pole female) A D A D -/g165...0dB speechcoder 0dB; -6db, - 12dB; -18dB +0..42dB in 6dB-steps 4k7 4k7 5.9V 6R8 6R8 (sideTone) ( ) AT parameter (outCalibrate[n]) n = 0...4 (inCalibrate) (inBbcGain) (outBbcGain) speechdecoder Ri=2k MICP MICN EPP EPN Figure 7: Audio block diagram Pin assignment:
1 MICN (Microphone - )
2 EPN (Earpiece)
3 EPP (Earpiece)
4 MICP
(Microphone +)
TC35i Terminal Hardware Interface Description Confidential / Released TC35i_T_HD_v01.05 Page 23/37 10.07.2003 The audio interface can be configured by AT commands. Please note that the 2 nd audio interface mentioned in [1] is not connected. Audio modes 2, 3 and 6 can be selected by setting AT^SAIC=2,1,1, for further details refer to [1]. The electrical characteristics of the voiceband part vary with the audio mode. To suit several types of audio equipment, three audio modes given by default can be selected by the AT command AT^SNFS, see [1]. In audio mode 4 and 5, the gain in the microphone, earpiece and the sidetone path can be adjusted from the cellular device application (different volume steps can be selected by AT commands). See Table 15: AT adjustable parameters for the characteristics of the audio modes. Table 6: Audio modes Mode No AT^SNFS= 1 4 5 Name Default Handset User Handset Plain Codec 1 Purpose Recommended handset (see chapter 6) User provided handset Direct access to speech coder Gains programmable via AT command NO YES YES Sidetone YES YES YES Volume control NO YES YES Limiter (receive) YES YES NO Echo control (send) Suppression Suppression NO Noise suppression NO NO NO MIC input signal for 0dBm0 @ 1024 Hz (at default gain settings) 12.5 mV 12.5 mV 315 mV Earpiece output signal in mV eff. @ 0dBm0, 1024 Hz, no load (at default gain settings); @ 3.14 dBm0 275 mV 275 mV default @ max volume 880 mV
3.7 Vpp
Sidetone gain (at default settings) 27.7 dB 27.7 dB -∞ dB 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. The output signal can directly be connected to the earpiece of the GSM cellular device or to an external handset earpiece (via I/O connector). In the opposite directi on the input signal from the microphone is first amplified by a programmable amplifier. After analog-to-digital conversion a 2Mbit/s data stream is generated and voiceband (decimation) filtering is performed. The resulting speech samples from the voiceband filters are handled by the DSP of the
TC35i Terminal Hardware Interface Description Confidential / Released TC35i_T_HD_v01.05 Page 24/37 10.07.2003 baseband controller to calculate e.g. amplifications, sidetone, echo cancellation or noise suppression. Full rate, half rate and enhanced full rate, speech and channel encoding including voice activity detection (VAD) and discontinuous transmission (DTX) and digital GMSK modulation are also performed on the GSM baseband processor. Note: With regard to acoustic shock, the cellular application must be designed to avoid sending false AT commands that might increase the amplification, e.g. for a high sensitive earpiece.
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3.6.3 Radio interface
An internal antenna cable adapts the antenna reference point (antenna connector type GSC from Murata) to the FME (male) connector. The position of the antenna reference point can be seen in Figure 1. Inside the TC35i module a 27nH inductor to ground provides additional ESD protection to the antenna connector. For details see Figure 8. To protect the inductor from damage no DC voltage must be applied to the antenna circuit. Figure 8: Antenna connector circuit on TC35i module /g183/g32Cable loss of internal cable <0.4dB @ 900MHz <0.6dB @ 1800MHz /g183/g32The system impedance is 50Ω. /g183/g32In every case, for good RF performance the return loss of the customer application should be better than 10dB (VSWR < 2). /g183/g32TC35i Terminal withstands a total mismatch at this connector when transmitting with power control level for maximum RF Power. EMC immunity complies with the vehicular environment requirements according to EN 301 489-7. For the application it is recommended to use an antenna with the following FME (female) connector: Figure 9: Recommended antenna connector GSC connector (from Murata) TRX In / Output L (27nH)
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3.6.4 SIM interface
The SIM interface is intended for 3V SIM cards in accordance with GSM 11.12 Phase 2. The card holder is a five wire interface according to GSM 11.11. A sixth pin has been added to detect whether or not a SIM card is inserted. All signals of the SIM interface are protected from electrostatic discharge with spark gaps to GND and clamp diodes to 2.9V and GND. Removing and inserting the SIM card during operation requires the software to be reinitialized. Therefore, after reinserting the SIM card it is necessary to restart TC35i Terminal. Note: No guarantee can be given, nor any liability accepted, if loss of data is encountered after removing the SIM card during operation. Also, no guarantee can be given for properly initializing any SIM card that the user inserts after having removed a SIM card during operation. In this case, the application must restart TC35i Terminal.
3.6.5 Status LED
A green LED displays the operating status of the terminal: Table 7: Coding of the green status LED Operating status LED Power Down off Not registered to the net (missing SIM, PIN, net) fast blinking Standby (registered to the net) slow flash (75ms On / 3s Off) Sleep mode (Power save mode, registered to the net) off Talk mode on
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4 Mechanical characteristics and mounting advice
Table 8: Mechanical characteristics Weight 130 g Dimensions (max) LxWxH = 65x74x33mm Temperature range -20°C to +55 °C Protection class IP40 (Avoid exposing TC35i Terminal to liquid or moisture, for example do not use it in a shower or bath.) Mechanical vibrations Amplitude 7.5 mm at 5-200 Hz sinus Max. pulse acceleration 30g pulse with 18 ms duration time Air humidity 5...80% (non condensing) Class of flammability UL94 HB Casing material PC/ABS Cycoloy 1200 HF grey 96444 rear front bottom top Figure 10: Design drawing
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4.1 Attaching the terminal
The TC35i Terminal can be attached e.g. to a 35mm top-hat rail installation using two M3 x 50mm screws and an additional fixture element, see Figure 12. In case you wish to order the recommended mounting kit, please refer to Chapter 7 for detailed information. Figure 11: Recommended screws Figure 12: Attaching TC35i Terminal onto a top- hat rail
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5 Electrical and environmental characteristics
Table 9: Absolute maximum ratings Parameter Port / Description Min. Max. Unit Supply voltage PLUS -50 30 V Overvoltage PLUS / for 1h 33 V Input voltage for on/off Control lines /IGT_IN, /PD_IN -5 30 V /TXD, /DTR, /RTS -30 +30 V RS-232 input voltage range /RXD, /CTS, /DSR, /DCD, /RING -0.3 +5.3 V Microphone input line voltage MICP, MICN -0.3 +10 V Earpiece input voltage EPP, EPN -0.3 +3.3 V Immunity against discharge of static electricity all connectors (lines) -8 +8 kV Protection Class IP40 (avoid exposing TC35i Terminal to liquid or moisture, for example do not use it in a shower or bath) IP 40 Mechanical vibrations amplitude @ 5-200Hz 7.5 mm Mechanical pulse- acceleration @ 18 ms duration 30 g Table 10: Operating conditions Parameter Min Typ Max Unit Ambient temperature -20 25 55 °C Supply voltage PLUS measured at (6-pole) western jack plug (1 to 6) 7.6 lowest voltage (minimum peak) incl. all ripple and drops 12 30 V
TC35i Terminal Hardware Interface Description Confidential / Released TC35i_T_HD_v01.05 Page 30/37 10.07.2003 Table 11: Characteristics power supply Parameter Description Conditions Min Typ Max Unit VPLUS Allowed voltage ripple (peak-peak), drop during transmit burst peak current Talk Mode, power control level for Pout max 1) 1 V @8V 480 550 @12V 700 800 Power Down mode @30V 1750 1850 µA @8V 45 @12V 30 SLEEP mode @30V 17 mA @8V 70 @12V 50 NET Searching mode @30V 30 mA @8V 60 @12V 45 IDLE mode @30V 25 mA @8V 270 560 @12V 170 330 Average supply current (average time 3 min.) TALK mode (max. current @GSM 900, Power Level 5) @30V 72 125 mA @8V 1.7 3.2 @12V 1.2 2.4 IPLUS Peak supply current (during 577µs transmission slot every 4.6ms) Power control level for Pout max @30V 0.7 1.2 A Allowed powerfail time without terminal reset or power down After this time the Terminal will be reset or switched off 1 ms tPLUS-Fail Allowed powerfail time without RTC (real time clock) reset After this time the RTC will be reset 7 s tR_PLUS Allowed rise time of VPLUS 0% to 100% 20 ms LECable Length of supply cable 3 m 1) Lowest voltage (minimum peak) incl. all ripple and drops >7.6V including voltage drop, ripple and spikes, measured at western jack (6-pole) pin (1 to 6) 2) Typical values measured with antenna impedance = 50 Ohm (return loss >20dB) Maximum values measured with mismatched antenna
TC35i Terminal Hardware Interface Description Confidential / Released TC35i_T_HD_v01.05 Page 31/37 10.07.2003 Table 12: Characteristics (requirements) On/Off control lines Parameter Description Conditions Min Typ Max Unit Vhigh active high 5 V Vlow Input voltage /IGT_IN, /PD_IN, /DTR 2 V RIN Input resistance of /IGT_IN, /PD_IN 47 kOhm RIN Input resistance of /DTR 4 6 8 kOhm tD_IGT Duration of active high /IGT_IN, /DTR 200 ms tD_PD Duration of active high /PD_IN 3.5 s tR_IGT Rise time /IGT_IN for power up 0% to 100% 20 ms tR_RTS Rise time /DTR for power up 0% to 100% 20 ms tD_passive Duration passive (low) of /IGT_IN, /DTR before restart after power down 1 s Table 13: Characteristics (requirements) RS-232 interface Parameter Description Conditions Min Typ Max Unit VOUT Transmitter Output Voltage for /RXD, /CTS, /DSR, /DCD, /RING @ 5kOhm load /g1775 /g1776 /g1777 V ROUT Transmitter Output Resistance /RXD, /CTS, /DSR, /DCD, /RING
770 Ohm
/TXD, /RTS, /DTR 4 6 8 kOhm VRIHYS Input Hysteresis 0.2 0.5 1 V VIlow Input Threshold Low 1.0 1.8 V VIhigh Input Threshold High 2.4 3 V Autobauding 4.8 115 kbps Baudrate Fixed range 0.300 115 kbps LECable Length of RS-232 cable 1.8 2 m
TC35i Terminal Hardware Interface Description Confidential / Released TC35i_T_HD_v01.05 Page 32/37 10.07.2003 Table 14: Characteristics (requirements) audio interface Parameter Min. Typ. Max. Unit DC (no load) at MICP 5.6 5.9 6.2 V DC at MICP in POWER DOWN 0 V DC (no load) at MICN 0 V DC Resistance differential MICN, MICP (balanced) 9.3 9.4 9.5 kOhm Impedance Zi (balanced) 1.4 1.5 1.7 kOhm Input level Uimax
1.03 VPP
MICP, MICN Frequency Range 300 3400 Hz fine scaling by DSP (inCalibrate) -∞ 0 dB Impedance (audio not active) 30 kOhm Impedance (balanced)
15 Ohm
Gain = 0dB @ 3.14 dBm0 no load audio mode = 5, outBbcGain = 0, outCalibrate = 32767 3.3 3.7 4.07 VPP Gain range -18 0 dB Gain accuracy 0.8 dB Frequency area 300 3400 Hz DC Offset (balanced) 100 mV Attenuation distortion for 300...3900Hz 1 dB Earpiece EPP, EPN Out-of-band discrimination 60 dB LEAudio Length of Audio (Handset) cable 3 m Unless otherwise stated, all specified values are valid for gain setting (gs) 0dB and 1kHz test signal. gs = 0dB means audio mode = 5 for EPP to EPN, inBbcGain= 0, inCalibrate = 32767, outBbcGain = 0, OutCalibrate = 16384, sideTone = 0.
TC35i Terminal Hardware Interface Description Confidential / Released TC35i_T_HD_v01.05 Page 33/37 10.07.2003 Audio Modes: The electrical characteristics of the voiceband part depend on the current audio mode selected by the AT command AT^SNFS. See Table 6: Audio modes. The audio modes 4 and 5 can be adjusted by parameters. Each audio mode is assigned a separate parameter set. Table 15: AT adjustable parameters Parameter Influence to Range Gain range Calculation inBbcGain MICP/MICN analogue amplifier gain of baseband controller before ADC inCalibrate digital attenuation of input signal after ADC (inCalibrate/ 32768) outBbcGain EPP/EPN analogue output gain of baseband controller after DAC outCalibrate[n] n = 0...4 digital attenuation of output signal after speech decoder, before summation of sidetone and DAC present for each volume step[n] outCalibrate[n]/ 32768) sideTone digital attenuation of sidetone is corrected internally by outBbcGain to obtain a constant sidetone independently to output volume (sideTone/ 32768) Note: The parameters inCalibrate, outCalibrate and sideTone accept also values from 32768 to 65535. These values are internally truncated to 32767.
TC35i Terminal Hardware Interface Description Confidential / Released TC35i_T_HD_v01.05 Page 34/37 10.07.2003 Table 16: Air interface Parameter Min Typ Max Unit E-GSM 900 880 915 MHz Frequency range Uplink (MS /g174 BTS) GSM 1800 1710 1785 MHz E-GSM 900 925 960 MHz Frequency range Downlink (BTS /g174 MS) GSM 1800 1805 1880 MHz RF power @ ARP at 50Ω load E-GSM 900 30.5 33 35 dBm GSM 1800 27.5 30 32 dBm E-GSM 900 174 Number of carriers GSM 1800 374 E-GSM 900 45 MHz Duplex spacing GSM 1800 95 MHz Carrier spacing 200 kHz Multiplex, Duplex TDMA / FDMA, FDD Time slots per TDMA frame 8 Time slots usable RX / TX 1 / 1 Frame duration 4.615 ms Time slot duration 577 µs Modulation GMSK E-GSM 900 - 102 dBm Receiver input sensitivity @ ARP Under all propagation conditions according to GSM specification GSM 1800 - 102 dBm E-GSM 900 -107 dBm Receiver input sensitivity @ ARP BER Class II < 2.4% @ static input level (no fading) GSM 1800 -106 dBm Length of antenna cable 3 m
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6 Full type approval
The Siemens reference setup submitted to type approve TC35i Terminal consists of the following components: /g183/g32TC35i Terminal with approved GSM Engine TC35i /g183/g32Votronic Handset type /g183/g32PC as MMI /g183/g32Power Supply: Mains adapter Sphere Design Type FW7207/12 PC Power supply SIM RS-232 TC35i Terminal Handset Antenna or Figure 13: Reference equipment for approval For ordering information please refer to Chapter 7.
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6.1 Restrictions
Later enhancements and modifications beyond the certified configuration require extra approvals. Each supplementary approval process includes submittal of the technical documentation as well as testing of the changes made. /g183/g32No further approvals are required for customer applications that comply with the approved TC35i Terminal configuration. /g183/g32Extra approval must be obtained for applications using other accessories than those included in the approved TC35i Terminal configuration (handset, power supply, MMI implementation supported by AT commands).
6.2 CE Conformity
The TC35i Terminal meets the requirements of the EU directives listed below: /g183/g32R&TTE Directive 1999/5/EG /g183/g32LVD 73/23/EEC /g183/g32EMC conformity in accordance with Directive 89/336/EEC
6.3 EMC
The TC35i Terminal meets EN 301489-7 requirements of equipment for vehicular and fixed use. (Note: V PLUS power fail time>1ms resets the terminal)
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7 List of parts and recommended accessories
Description Supplier Ordering information TC35i Terminal Siemens Siemens ordering number L36880-N8610-A100 Mounting kit for top/hat rail installation Sphere Design Ordering number: 20100 Sphere Design Saarpfalz-Park 17 D-66450 Bexbach / Saar Phone: +49-6826-5200-0 Fax: +49-6826-5200-25 E-Mail: info@spheredesign.de http://www.spheredesign.de Power supply unit Sphere Design Ordering number: 39001 Sphere Design Saarpfalz-Park 17 D-66450 Bexbach / Saar Phone: +49-6826-5200-0 Fax: +49-6826-5200-25 E-Mail: info@spheredesign.de http://www.spheredesign.de Handset Votronic Ordering number: HH-SI-30.3/V1.1/0 Votronic GmbH Saarbrücker Str. 8 D-86386 St. Ingbert Phone: +49-6894-9255-44 Fax: +49-6894-9255-88 Antenna (900 1800 MHz) Märtens Ordering number: various types available Märtens Systemelektronik GmbH &Co. KG Kablekamp 2 D-30179 Hannover Phone: +49-511-674 95 826 Fax: +49-511-63 63 41 E-Mail: mc-gsm-data@t-online.de http://www.maertens-communication.com RS-232 cable (9 pin D-Sub) Tecline Ordering number: 300574 Tecline Behrener Str. 8 D-66117 Saarbrücken Phone: +49-681-926 78-29 Fax: +49-681-926 78-50 BB35 Bootbox Siemens Siemens ordering number: L36880-N8102-A100