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Hardware Interface Description HMS1 Siemens Cellular Engine Version: 01.62 DocID: HMS1_HD_V01.62

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 2 of 39 2006-08-21 Document Name: HMS1 Hardware Interface Description Version: 01.62 Date: August 21, 2006 DocId: HMS1_HD_V01.62 Status: Confidential / Preliminary General note 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 consequential, 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 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 2006

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 3 of 39 2006-08-21 Contents 0. Document History ...................................................................................................... 5 1. Introduction ................................................................................................................ 6 1.1. Related Documents............................................................................................. 6 1.2. Terms and Abbreviations .................................................................................... 6 1.3. Type Approval..................................................................................................... 9 1.4. Safety Precautions ............................................................................................ 11 2. Product Concept ...................................................................................................... 13 2.1. Key Features at a Glance.................................................................................. 13 2.2. HMS1 System Overview ................................................................................... 15 2.3. Circuit Concept.................................................................................................. 16 3. Application Interface................................................................................................ 17 3.1. Operating Modes............................................................................................... 18 3.2. Power Supply.................................................................................................... 19 3.2.1. Minimizing Power Losses .................................................................... 19 3.3. Power-Up / Power-Down Scenarios .................................................................. 20 3.3.1. Turn on HMS1 ..................................................................................... 20 3.3.2. Turn off HMS1 ..................................................................................... 20 3.4. Power Saving.................................................................................................... 21 3.5. RTC Backup...................................................................................................... 21 3.6. USIM Interface .................................................................................................. 21 3.7. USB Interface.................................................................................................... 21 3.8. Control Signals.................................................................................................. 22 3.8.1. PWR_IND Signal................................................................................. 22 3.8.2. Status Signals ..................................................................................... 22 4. Antenna Interface..................................................................................................... 23 4.1. Antenna Installation........................................................................................... 23 4.1.1. Test Antenna ....................................................................................... 23 5. Electrical, Reliability and Radio Characteristics.................................................... 24 5.1. Absolute Maximum Ratings............................................................................... 24 5.2. Operating Temperatures ................................................................................... 24 5.3. Storage Conditions............................................................................................ 25 5.4. Reliability Characteristics .................................................................................. 26 5.5. Pin Assignment and Signal Description............................................................. 27 5.6. Power Supply Ratings....................................................................................... 31 5.7. Air Interface....................................................................................................... 32 5.8. Electrostatic Discharge...................................................................................... 34 6. Mechanics................................................................................................................. 35 6.1. Mechanical Dimensions HMS1.......................................................................... 35 7. Board-to-Board Application Connector.................................................................. 37 8. Reference Approval ................................................................................................. 38 8.1. Reference Equipment for Type Approval........................................................... 38 8.2. Compliance with FCC Rules and Regulations ................................................... 39

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 4 of 39 2006-08-21 Tables Table 1: Directives..................................................................................................................9 Table 2: Standards of North American type approval..............................................................9 Table 2: Standards of European type approval.......................................................................9 Table 3: Requirements of quality..........................................................................................10 Table 4: Overview of operating modes .................................................................................18 Table 5: Absolute maximum ratings......................................................................................24 Table 6: Ambient temperature according to IEC 60068-2 (without forced air circulation) ......24 Table 7: Storage conditions..................................................................................................25 Table 8: Summary of reliability test conditions......................................................................26 Table 9: Signal description ...................................................................................................28 Table 10: Power supply ratings ............................................................................................31 Table 11: Air Interface GSM .................................................................................................32 Table 12: Air Interface UMTS ...............................................................................................33 Table 13: Measured electrostatic values...............................................................................34 Table 14: Electrical and mechanical characteristics of the 80 pin board-to-board connector.37 Figures Figure 1: HSM system overview ...........................................................................................15 Figure 2: HMS1 schematic overview ....................................................................................16 Figure 3: Power supply limits during transmit burst...............................................................20 Figure 5: Internal antenna for HMS.......................................................................................23 Figure 6: Pin assignments on board-to-board connector ......................................................27 Figure 7: HMS1 Top View (prelim.).......................................................................................35 Figure 8: HMS1 Dimensions (prelim.)...................................................................................36 Figure 9: Mechanical dimensions of 80 pin board-to-board connector ..................................37 Figure 10: Reference equipment for Type Approval .............................................................38

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 5 of 39 2006-08-21 0. Document History New document: "HMS1 Hardware Interface Description" Version 01.62 Chapter What is new All Initial document setup.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 6 of 39 2006-08-21 1. Introduction This document describes the hardware of the Siemens HMS1 module that connects to a cellular device application and the air interface. It helps you quickly retrieve interface specifications, electrical and mechanical details and information on the requirements to be considered for integrating further components. The HMS1 module is a single band WCDMA, quad band GSM/GPRS data modem and features high downlink speeds using HSDPA. It can be connected to a standard PC via USB interface for high speed data communication, such as email, web browsing, data base retrieval, server access, as well as audio and video streaming. 1.1. Related Documents [1] HMS1 AT Command Set, Version 01.62 [2] DSB75 Support Box - Evaluation Kit for Siemens Cellular Engines 1.2. Terms and Abbreviations Abbreviation Description A/D Analog-to-Digital Converter AF Audio Frequency AFC Automatic Frequency Control AGC Automatic Gain Control AMR Adaptive Multi Rate ARP Antenna Reference Point ASIC Application Specific Integrated Circuit BB Baseband CPU Central Processing Unit CR Change Request CTR Common Technical Regulation DAI Digital Audio Interface /DCD Data Carrier Detect DFC Digital Frequency Centering DSB Development Support Board DSP Digital Signal Processor /DSR Data Set Ready /DTR Data Terminal Ready DTX Discontinuous transmission

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 8 of 39 2006-08-21 PLL Phase Locked Loop PSU Power Supply Unit RAM Random Access Memory RF Radio Frequency /RING Ring Indication ROM Read-Only Memory RTC Real Time Clock /RXD Receive direction Rx Receive direction SAW Surface Acoustical Wave Filter SELV Safety Extra Low Voltage SIM Subscriber Identification Module SMS Short Message Service SRAM Static Random Access Memory SW Software TBR Technical Based Regulation TBD To Be Defined TBI To Be Inserted TDD Time Division Duplex TDMA Time Division Multiple Access /TXD Transmit direction Tx Transmit direction UART Universal Asynchronous Receiver Transmitter VCO Voltage Controlled Oscillator VCXO Voltage Controlled Quartz Oscillator VSWR Voltage Standing Wave Ratio

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 9 of 39 2006-08-21 1.3. Type Approval HMS1 has been approved to comply with the directives and standards listed below. Table 1: 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). The product is labeled with the CE conformity mark 89/336/EC Directive on electromagnetic compatibility 73/23/EC Directive on electrical equipment designed for use within certain voltage limits (Low Voltage Directive) 2002/95/EC Directive of the European Parliament and of the Council of 27 January 2003 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS) Table 2: Standards of North American type approval CFR Title 47 Code of Federal Regulations, Part 22 and Part 24 (Telecommunications, PCS); US Equipment Authorization FCC NAPRD.03 V3.5.1 Overview of PCS Type certification review board Mobile Equipment Type Certification and IMEI control PCS Type Certification Review board (PTCRB) RSS133 (Issue2) Canadian Standard Table 3: Standards of European type approval 3GPP TS 51.010-1 Digital cellular telecommunications system (Phase 2); Mobile Station (MS) conformance specification ETSI EN 301 511 V9.0.2 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) GCF-CC V3.xx.0 Global Certification Forum - Certification Criteria ETSI EN 301 489-1 V1.4.1 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 1: Common Technical Requirements

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 10 of 39 2006-08-21 ETSI EN 301 489-7 V1.2.1 (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) IEC/EN 60950-1 (2001) Safety of information technology equipment (2000) Table 4: Requirements of quality IEC 60068 Environmental testing DIN EN 60529 IP codes SAR requirements specific to portable mobiles Mobile phones, PDAs or other portable transmitters and receivers incorporating a GSM module must be in accordance with the guidelines for human exposure to radio frequency energy. This requires the Specific Absorption Rate (SAR) of portable HMS1 based applications to be evaluated and approved for compliance with national and/or international regulations. Since the SAR value varies significantly with the individual product design manufacturers are advised to submit their product for approval if designed for portable use. For European and US markets the relevant directives are mentioned below. It is the responsibility of the manufacturer of the final product to verify whether or not further standards, recommendations or directives are in force outside these areas. Products intended for sale on US markets ES 59005/ANSI C95.1 Considerations for evaluation of human exposure to Electromagnetic Fields (EMFs) from Mobile Telecommunication Equipment (MTE) in the frequency range 30MHz - 6GHz Products intended for sale on European markets EN 50360 Product standard to demonstrate the compliance of mobile phones with the basic restrictions related to human exposure to electromagnetic fields (300MHz - 3GHz)

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 11 of 39 2006-08-21 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 HMS1. 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’s 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 speakerphone operation. Before making a call with a hand-held terminal or mobile, park the vehicle. Speakerphones must be installed by qualified personnel. Faulty installation or operation can constitute a safety hazard.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 12 of 39 2006-08-21 SOS IMPORTANT! Cellular terminals or mobiles operate using radio signals and cellular networks. Because of this, connection cannot be guaranteed at all times under 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 dialing 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.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 13 of 39 2006-08-21 2. Product Concept 2.1. Key Features at a Glance Feature Implementation General Frequency bands Quad band: GSM 850/900/1800/1900MHz Single band: WCDMA 2100 GSM class Small MS Output power (according to Release 99, V5) Class 4 (+33dBm ±2dB) for EGSM850 Class 4 (+33dBm ±2dB) for EGSM900 Class 1 (+30dBm ±2dB) for GSM1800 Class 1 (+30dBm ±2dB) for GSM1900 Class E2 (+27dBm ± 3dB) for GSM 850 8-PSK Class E2 (+27dBm ± 3dB) for GSM 900 8-PSK Class E2 (+26dBm +3 /-4dB) for GSM 1800 8-PSK Class E2 (+26dBm +3 /-4dB) for GSM 1900 8-PSK Class 3 (+24dBm +1/-3dB) for UMTS 2100, WCDMA FDD BdI The values stated above are maximum limits. According to Release 99, Version 5, the maximum output power in a multislot configuration may be lower. The nominal reduction of maximum output power varies with the number of uplink timeslots used and amounts to 3.0dB for 2Tx. Power supply 3.6V, supplied by limited power source Ambient operating temperature according to IEC 60068-2 Normal operation 0°C to 55°C Physical Dimensions: 70mm x 49.7mm x 5mm Weight: approx. 17g RoHS All hardware components fully compliant with EU RoHS Directive GSM / GPRS / EGPRS / UMTS features Data transfer UMTS • FDD Mode • HSDPA Mode Cat. 11.12 • GPRS • Multislot Class 10 • Full PBCCH support • Mobile Station Class B • Coding Scheme 1 – 4

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 14 of 39 2006-08-21 Feature Implementation EGPRS • Multislot Class 10 • Mobile Station Class B • Modulation and Coding Scheme MCS 1 – 9 CSD • V.110, RLP, non-transparent • GSM: 2.4, 4.8, 9.6, 14.4kbps • UMTS: 57.6kbps SMS • Point-to-point MT and MO • Cell broadcast • Text and PDU mode Fax Group 3; Class 1, Class 2 Software AT commands AT-Hayes GSM 07.05 and 07.07, Qualcomm AT command Set Firmware update Generic update from host application over USB. Interfaces USB Supports a USB 1.1 Full Speed (12Mbit/s) device interface. SIM SIM card reader on board Antenna External antenna can be connected via antenna pads. For test purposes a 50Ohm antenna can be connected via coaxial switch (Hirose MS-156NB). Module interface 80 pin board-to-board connector Power on/off, Reset Power on/off • Switch-on by hardware pin IGT • Switch-off by AT command Reset • Orderly shutdown and reset by AT command • Emergency reset by hardware pins EMERG_RST Evaluation kit DSB DSB Evaluation Board designed to test and type approve Siemens cellular engines and provide a sample configuration for application engineering.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 15 of 39 2006-08-21 2.2. HMS1 System Overview AntennaInterfaceUSB PowerSupplySim cardholder Figure 1: HSM system overview

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 16 of 39 2006-08-21 2.3. Circuit Concept Figure 2 shows a block diagram of the HMS module and illustrates the major functional components: Base band block: • WCDMA/GSM Baseband Controller • Power supply unit • Flash/SDRAM memory • External Interface, 80 pin board-to-board connector RF section: • RF WCDMA Receiver • RF WCDMA Transmitter • RF Power Amplifiers • EPCOS receive SAWs (according to variant – see below) • Antenna Connector B2BConnectorProcessorPower ManagementTransceiver ReceiverGSMPAWCDMAPAFrontend48MHz32.786kHzTCTCXO19.2MHzNANDFlashSDRAMUSBPWR_INDEMERG_RSTCONTROLIGTVEXTBATT+VDDLPGreenBlueSIMCardHolder Figure 2: HMS1 schematic overview

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 17 of 39 2006-08-21 3. Application Interface HMS1 is equipped with an 80 pin board-to-board connector that connects to the external application. The host interface incorporates several sub-interfaces described in the following chapters: • Operation Modes - see Section 3.1 • Power supply - see Section 3.2 • SIM interface - see Section 3.6 • Serial interface USB - see Section 3.7. • Status and control lines: IGT, EMERG_RST, PWR_IND, STATUS1/2 – see Table 10

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 18 of 39 2006-08-21 3.1. Operating Modes The table below briefly summarizes the various operating modes referred to in the following chapters. Table 5: Overview of operating modes GSM / GPRS SLEEP Tbd. GSM IDLE Software is active. Once registered to the GSM network, paging with BTS is carried out. The module is ready to send and receive. GSM DATA Connection between two subscribers is in progress. Power consumption depends on network coverage individual settings. GPRS IDLE EGPRS IDLE Module is ready for GPRS/EGPRS data transfer, but no data is currently sent or received. Power consumption depends on network settings and GPRS/EGPRS configuration (e.g. multislot settings). GPRS DATA EGPRS DATA GPRS/EGPRS data transfer in progress. Power consumption depends on network settings (e.g. power control level), uplink / downlink data rates, GPRS/EGPRS configuration (e.g. used multislot settings) and reduction of maximum output power. UMTS IDLE Software is active. Once registered to the UMTS network, paging with BTS is carried out. The module is ready to send and receive. UMTS DATA UMTS Data Transfer in progress. Normal operation HSDPA HSDPA High Speed Data connection in Downlink Direction. POWER DOWN Normal shutdown after sending the AT command. Operating voltage (connected to BATT+) remains applied.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 19 of 39 2006-08-21 3.2. Power Supply HMS1 needs to be connected to a power supply at the B2B connector (5 pins each BATT+ and GND). The power supply of HMS1 has to be a single voltage source at BATT+. It must be able to provide the peak current during the GSM uplink transmission. All the key functions for supplying power to the device are handled by the power management section of the analog controller. This IC provides the following features: • Stabilizes the supply voltages for the GSM / UMTS baseband using low drop linear voltage regulators. • Switches the module's power voltages for the power-up and -down procedures. • Delivers, across the VEXT pin, a regulated voltage for an external application. This voltage is not available in Power-down mode. • SIM switch to provide SIM power supply. 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 3.3V on the HMS1 board, not even in a GSM transmit burst where current consumption can rise to typical peaks of 2A. It should be noted that HMS1 switches off when exceeding these limits. Any voltage drops that may occur in a transmit burst should not exceed 400mV. In IDLE and SLEEP mode, the module switches off if the minimum battery voltage (Vbattmin) is reached. Example: VImin = 3.3V Dmax = 0.4V Vbattmin = VImin + Dmax Vbattmin = 3.3V + 0.4V = 3.7V The best approach to reducing voltage drops is to use a board-to-board connection as recommended, and a low impedance power source. The resistance of the power supply lines on the host board and of a battery pack should also be considered. Note: If the application design requires an adapter cable between both board-to-board connectors, use a flex cable as short as possible in order to minimize power losses.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 20 of 39 2006-08-21 Example: If the length of the flex cable reaches the maximum length of 100mm, this connection may cause, for example, a resistance of 30mΩ in the BATT+ line and 30mΩ in the GND line. As a result, a 2A transmit burst would add up to a total voltage drop of 120mV. Plus, if a battery pack is involved, further losses may occur due to the resistance across the battery lines and the internal resistance of the battery including its protection circuit. Figure 3: Power supply limits during transmit burst 3.3. Power-Up / Power-Down Scenarios In general, be sure not to turn on HMS1 while it is beyond the safety limits of voltage and temperature. HMS1 would immediately switch off after having started and detected these inappropriate conditions. In extreme cases this can cause permanent damage to the module. 3.3.1. Turn on HMS1 When the HMS1 module is in Power-down mode, it can be started to Normal mode or Airplane mode by driving the IGT (ignition) line to ground. This must be accomplished with an open drain/collector driver to avoid current flowing into this pin. 3.3.1.1. Reset or Turn off HMS1 in Case of Emergency Caution: Use the EMERG_RST pin only when, due to serious problems, the software is not responding for more than 5 seconds. Pulling the EMERG_RST pin causes the loss of all information stored in the volatile memory. Therefore, this procedure is intended only for use in case of emergency, e.g. if HMS1 does not respond, if reset or shutdown via AT command fails. The EMERG_RST signal is available on the application interface. 3.3.2. Turn off HMS1 HMS1 can be turned off by Normal shutdown: Software controlled by AT command. Be sure not to disconnect the supply voltage VBATT+. Otherwise you run the risk of losing data. Transmit burst 2ATransmit burst 2ARippleDropmin. 3.3VBATT+

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 21 of 39 2006-08-21 3.4. Power Saving Intended for power saving, SLEEP mode reduces the functionality of the HMS1 to a minimum and thus minimizes the current consumption. The different sleep modes will be specified later. 3.5. RTC Backup The internal Real Time Clock of HMS1 is supplied from a separate voltage regulator in the analog controller which is also active when HMS1 is in POWER DOWN status. In addition, you can use the VDDLP pin on the board-to-board connector to backup the RTC from an external capacitor or a battery (rechargeable or non-chargeable). The capacitor or battery is charged by the power management controller of HMS1. If the voltage supply at BATT+ is disconnected, the RTC can be powered by the capacitor or battery. The size of the capacitor determines the duration of buffering when no voltage is applied to HMS1, i.e. the larger the capacitor the longer HMS1 will save the date and time. 3.6. USIM Interface The base band processor has an integrated SIM interface compatible with the 34.121 USIM Testing IC Card standard. This is wired to an integrated SIM card holder. The USIM interface supports 3V and 1.8V USIM cards. 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. 3.7. USB Interface HMS1 supports a USB 1.1 Full Speed (12Mbit/s) device interface. The USB interface is the recommended communication interface for high speed data transmission. To properly connect the module’s USB interface to the host a USB 2.0 full speed compatible connector is required. The HMS1 distribution contains the suitable USB driver to operate HMS1 over USB. It is recommended to use this drive. The USB host is responsible for supplying, across the VUSB_IN line, power to the module’s USB interface, but not to other HMS1 interfaces. This is because HMS1 is designed as a self-powered device compliant with the “Universal Serial Bus Specification Revision 1.1” (The specification is ready for download on http://www.usb.org/developers/docs/).

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 22 of 39 2006-08-21 3.8. Control Signals Several control lines are signaling the states of the HMS1 module or control the module. These states are power down, stand by, paging, GSM voice call, GSM data call, UMTS voice call, UMTS data call or HSDPA connection. 3.8.1. PWR_IND Signal PWR_IND notifies the on/off state of the module. High state of PWR_IND indicates that the module is switched off. The state of PWR_IND immediately changes to low when IGT is pulled low. For state detection an external pull-up resistor is required. 3.8.2. Status Signals Two status signals (GREEN, BLUE) are provided for signaling the module’s connectivity status: • When searching for a network the signal 1 (GREEN) alternates at 2Hz • When registered with a GSM network signal 1 is active • When registered with a WCDMA network signal 2 (BLUE) goes active, signal 1 inactive

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 23 of 39 2006-08-21 4. Antenna Interface The RF interface has an impedance of 50Ω. HMS1 is capable of sustaining a total mismatch at the antenna connector or pad without any damage, even when transmitting at maximum RF power. The external antenna must be matched properly to achieve best performance regarding radiated power, DC-power consumption, modulation accuracy and harmonic suppression. Antenna matching networks are not included on the HMS1 PCB and should be placed in the host application. The connection of the antenna or other equipment must be decoupled from DC voltage. This is necessary because the antenna connector is DC coupled to ground via an inductor for ESD protection. 4.1. Antenna Installation To suit application requirements the HMS1 module adapts an internal antenna from Skycross that is connected to the two antenna pads: Figure 4: Internal antenna for HMS 4.1.1. Test Antenna For production and type approval test the HMS1 module also provides a subminiature coaxial switch from Hirose Ltd. The product name is: MS-156NB For detailed specifications and latest product information please contact your Hirose dealer or visit the Hirose home page, for example http://www.hirose.com.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 24 of 39 2006-08-21 5. Electrical, Reliability and Radio Characteristics 5.1. Absolute Maximum Ratings The absolute maximum ratings stated in Table 6 are stress ratings under any conditions. Stresses beyond any of these limits will cause permanent damage to HMS1. The power supply shall be compliant with the SELV safety standard defined in EN60950. The supply current must be limited according to Table 6. Table 6: Absolute maximum ratings Parameter Min Max Unit Supply voltage BATT+ -0.3 +3.7 V Voltage at digital pins in POWER DOWN mode -0.3 +0.3 V Voltage at digital pins in normal operation -0.3 +3.0 V Voltage at analog pins in POWER DOWN mode -0.3 +0.3 V Voltage at analog pins in normal operation -0.3 +3.0 V VUSB_IN -0.3 +3.5 V USB_DP, USB_DN -0.3 +5.5 V VDDLP -0.3 +3.25 V 5.2. Operating Temperatures Table 7: Ambient temperature according to IEC 60068-2 (without forced air circulation) Parameter Min Typ Max Unit Normal operation 0 +25 +55 °C

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 25 of 39 2006-08-21 5.3. Storage Conditions The conditions stated below are only valid for modules in their original packed state in weather protected, non-temperature-controlled storage locations. Normal storage time under these conditions is 12 months maximum. Table 8: Storage conditions Type Condition Unit Reference Air temperature: Low High -40 +85 °C ETS 300 019-2-1: T1.2, IEC 68-2-1 Ab ETS 300 019-2-1: T1.2, IEC 68-2-2 Bb Humidity relative: Low High Condens. 10 90 at 30°C 90-100 at 30°C % --- ETS 300 019-2-1: T1.2, IEC 68-2-56 CbETS 300 019-2-1: T1.2, IEC 68-2-30 DbAir pressure: Low High 70 106 kPa IEC TR 60271-3-1: 1K4 IEC TR 60271-3-1: 1K4 Movement of surrounding air 1.0 m/s IEC TR 60271-3-1: 1K4 Water: rain, dripping, icing and frosting Not allowed --- --- Radiation: Solar Heat 1120 600 W/m2 ETS 300 019-2-1: T1.2, IEC 68-2-2 Bb ETS 300 019-2-1: T1.2, IEC 68-2-2 Bb Chemically active substances Not recommended IEC TR 60271-3-1: 1C1L Mechanically active substances Not recommended IEC TR 60271-3-1: 1S1 Vibration sinusoidal: Displacement Acceleration Frequency range 1.5 5 2-9 9-200 mm m/s2 Hz IEC TR 60271-3-1: 1M2 Shocks: Shock spectrum Duration Acceleration semi-sinusoidal1 50 ms m/s2 IEC 68-2-27 Ea

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 26 of 39 2006-08-21 5.4. Reliability Characteristics Table 9: Summary of reliability test conditions Type of test Conditions Standard Vibration Frequency range: 10-20Hz; acceleration: 3.1mm amplitude Frequency range: 20-500Hz; acceleration: 5g Duration: 2h per axis = 10 cycles; 3 axes DIN IEC 68-2-6 Shock half-sinus Acceleration: 500g Shock duration: 1msec 1 shock per axis 6 positions (± x, y and z) DIN IEC 68-2-27 Dry heat Temperature: +70 ±2°C Test duration: 16h Humidity in the test chamber: < 50% EN 60068-2-2 Bb ETS 300 019-2-7 Temperature change (shock) Low temperature: -40°C ±2°C High temperature: +85°C ±2°C Changeover time: < 30s (dual chamber system) Test duration: 1h Number of repetitions: 100 DIN IEC 68-2-14 Na ETS 300 019-2-7 Damp heat cyclic High temperature: +55°C ±2°C Low temperature: +25°C ±2°C Humidity: 93% ±3% Number of repetitions: 6 Test duration: 12h + 12h DIN IEC 68-2-30 Db ETS 300 019-2-5 Cold (constant exposure) Temperature: -40 ±2°C Test duration: 16h DIN IEC 68-2-1

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 27 of 39 2006-08-21 5.5. Pin Assignment and Signal Description The board-to-board connector on HMS1 is an 80-pin double-row receptacle. Figure 5: Pin assignments on board-to-board connector 1 GND GND 80 2 n.c. n.c. 79 3 n.c. PWR_IND 78 4 GND n.c. 77 5 n.c. n.c. 76 6 n.c. n.c. 75 7 n.c. GREEN 74 8 n.c. BLUE 73 9 n.c. n.c. 72 10 n.c. n.c. 71 11 n.c. n.c. 70 12 VUSB_IN USB_DP 69 13 n.c. USB_DN 68 14 n.c. n.c. 67 15 n.c. do not use 66 16 n.c. n.c. 65 17 n.c. n.c. 64 18 n.c. n.c. 63 19 n.c. n.c. 62 20 n.c. n.c. 61 21 GND n.c. 60 22 n.c. n.c. 59 23 n.c. n.c. 58 24 n.c. do not use 57 25 n.c. IGT 56 26 n.c. EMERG_RST 55 27 n.c. n.c. 54 28 n.c. n.c. 53 29 n.c. n.c. 52 30 n.c. n.c. 51 31 n.c. n.c. 50 32 n.c. n.c. 49 33 VDDLP n.c. 48 34 n.c. n.c. 47 35 n.c. VEXT 46 36 GND BATT+ 45 37 GND BATT+ 44 38 GND BATT+ 43 39 GND BATT+ 42 40 GND BATT+ 41

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 28 of 39 2006-08-21 Table 10: Signal description Function Signal name IO Signal form and level Comment VBATT = 3.6V±5% I ≈ 2A, during Tx burst (GSM) Power supply BATT+ I n Tx = n x 577µs peak current every 4.616ms Five pins of BATT+ and GND must be connected in parallel for supply purposes because higher peak currents may occur. Minimum voltage must not fall below 3.3V including drop, ripple, spikes. Power supply GND Ground Application Ground External supply voltage VEXT O Normal mode: VOmin = 2.70V VOtyp = 2.85V VOmax = 3.00V IOmax = Tbd. VEXT may be used for application circuits, for example to supply power for an SD card. If unused keep pin open. The external digital logic must not cause any spikes or glitches on voltage VEXT. Power indicator PWR_IND O VIHmax = Tbd. VOLmax = Tbd. at Imax = Tbd. PWR_IND (Power Indicator) notifies the module’s on/off state. PWR_IND is an open collector that needs to be connected to an external pull-up resistor. Low state of the open collector indicates that the module is on. Vice versa, high level notifies the Power-down mode. Therefore, the pin may be used to enable external voltage regulators which supply an external logic for communication with the module, e.g. level converters. Ignition IGT I Internal pull-up: RI ≈ 200kΩ VILmax = Tbd. at Imax = Tbd. VOHmax = Tbd. ON ~~~|____|~~~ Active Low ≥ 400ms (to be verified) This signal switches on the module. This line must be driven low by an open drain or open collector driver. Emergency reset EMERG_RST I Internal pull-up. VILmax = 0.2V at Imax = -0.2mA Signal ~~~|______|~~~ Pull down ≥ Tbd. Reset in case of emergency. This line must be driven low by open drain or open collector. If unused keep pin open.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 29 of 39 2006-08-21 Function Signal name IO Signal form and level Comment RTC backup VDDLP I RI ≈ 1kΩ VBATT+ = 0V: VI = 1.5V…3.25V at Imax= Tbd. If unused keep pin open. VUSB_IN I VINmin = 3.2V VINmax = 3.5V USB USB_DP USB_DN I/O Differential Output Crossover voltage Range VCRSmin = 1.3V, VCRSmax = 2.0V Pullup at USB_DP Rtyp=1.5kOhm All electrical characteristics according to USB Implementers’ Forum, USB 1.1 Full Speed Specification.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 30 of 39 2006-08-21 Function Signal name IO Signal form and level Comment Status Indication BLUE GREEN O O VOHmin = BATT+ - 0.2V VOLmax = Tbd. IOmax = Tbd. Signals can be used to control LEDs via driving transistors. BLUE: “0” = module has been registered to an UMTS cell. GREEN: “0” = module has been registered to a GSM cell. Constantly changing between “0” and “1” = module is in “network search” state. CCRST O RO ≈ 50Ω VOLmax = 0.2V at I = 1mA VOHmin = 2.7V at I = -1mA VOHmax = 3.1V CCIO I/O RI ≈ 10kΩ VILmax = 1V VILmin = -0.3V VIHmin = 1.9V VIHmax = 3.2V VOLmax = 0.2V at I = 1mA VOHmin = 2.7V at I = -1mA VOHmax = 3.1V CCCLK O RO ≈ 100Ω VOLmax = 0.25V at I = 1mA VOHmin = 2.65V at I = -1mA VOHmax = 3.1V SIM interface specified for use with 3V SIM card CCVCC O VOmin = 2.9V VOtyp = 3V VOmax = 3.1V IOmax = -50mA All signals of SIM interface are protected against ESD with a special diode array. CCRST O RO ≈ 50Ω VOLmax = 0.2V at I = 1mA VOHmin = 1.55V at I = -1mA VOHmax = 1.85V CCIO I/O RI ≈ 10kΩ VILmax = 0.6V VILmin = -0.3V VIHmin = 1.15V VIHmax = 1.85V VOLmax = 0.2V at I = 1mA VOHmin = 1.5V at I = -1mA VOHmax = 1.85V CCCLK O RO ≈ 100Ω VOLmax = 0.25V at I = 1mA VOHmin = 1.5V at I = -1mA VOHmax = 1.85V SIM interface specified for use with 1.8V SIM card CCVCC O VOmin = 1.74V VOtyp = 1.8V VOmax = 1.86V IOmax = -50mA All signals of SIM interface are protected against ESD with a special diode array.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 31 of 39 2006-08-21 5.6. Power Supply Ratings Table 11: Power supply ratings Parameter Description Conditions Min Typ Max UnitSupply voltage Directly measured at reference points Tbd. BATT+ and GND. Voltage must stay within the min/max values, including voltage drop, ripple, spikes. -5% 3.6 +5% V Voltage drop during transmit burst Normal condition, power control level for Pout max 400 mV BATT+ Voltage ripple Normal condition, power control level for Pout max @ f<200kHz @ f>200kHz 50 2 mV mV IVDDLP RTC Backup @ BATT+ = 0V Tbd. µA OFF State supply current POWER DOWN mode Tbd. Tbd. µA SLEEP mode @ DRX = 9 Tbd. mA SLEEP mode @ DRX = 5 Tbd. mA SLEEP mode @ DRX = 2 Tbd. mA IBATT+ Average standby supply current2) IDLE mode @ DRX = 2 Tbd. mA

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 32 of 39 2006-08-21 5.7. Air Interface Test conditions: All measurements have been performed at Tamb= 25°C, VBATT+ nom = . The reference points used on HMS1 are the BATT+ and GND contacts. Table 12: Air Interface GSM Parameter Min Typ Max Unit GSM 850 824 849 MHz E-GSM 900 880 915 MHz GSM 1800 1710 1785 MHz Frequency range Uplink (MS → BTS) GSM 1900 1850 1910 MHz GSM 850 869 894 MHz E-GSM 900 925 960 MHz GSM 1800 1805 1880 MHz Frequency range Downlink (BTS → MS) GSM 1900 1930 1990 MHz GSM 850 31 33 35 dBm E-GSM 9001 31 33 35 dBm GSM 18002 28 30 32 dBm RF power @ ARP with 50Ω load GSM 1900 28 30 32 dBm GSM 850 124 E-GSM 900 174 GSM 1800 374 Number of channels GSM 1900 299 GSM 850 45 MHz E-GSM 900 45 MHz GSM 1800 95 MHz Duplex spacing GSM 1900 80 MHz Carrier spacing 200 kHz Multiplex, Duplex TDMA / FDMA, FDD Time slots per TDMA frame 8 Frame duration 4.615 ms Time slot duration 577 µs Modulation GMSK GSM 850 -102 -105.5 dBm E-GSM 900 -102 -105.5 dBm GSM 1800 -102 -105.5 dBm Receiver input sensitivity @ ARP BER Class II < 2.4% (static input level) GSM 1900 -102 -105.5 dBm 1 Power control level PCL 5 2 Power control level PCL 0

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 33 of 39 2006-08-21 Table 13: Air Interface UMTS Parameter Min Typ Max Unit UMTS Band I 1920 1980 MHz Frequency range Uplink (MS → BTS) UMTS Band I 2110 2170 MHz Frequency range Downlink (BTS → MS) UMTS Band I 21 24 25 dBm Max RF power @ ARP with 50Ω load Power Class 3 UMTS Band I 190 MHz Duplex spacing Channel raster 200 kHz Duplex FDD UMTS Band I -117 dBm/3,84 Mhz Receiver input sensitivity @ ARP BER < 0,001 (static input level) DPCH_Ec with 12,2 kbps reference channel

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 34 of 39 2006-08-21 5.8. Electrostatic Discharge The HSDPA 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 HMS1 module. Special ESD protection provided on HMS1: • Antenna interface: one discharge circuit • SIM interface: serial resistor, clamp diodes for protection against over voltage. • The remaining parts of HMS1 are not accessible to the user of the final product (since they are installed within the device) and therefore, are only protected according to the “Human Body Model” requirements. HMS1 has been tested according to the EN 61000-4-2 standard. The measured values can be gathered from the following table. Table 14: Measured electrostatic values Specification / Requirements Contact discharge Air discharge CE ETS 300342-1 (June 1997) ESD at SIM port ± 4kV ± 8kV ESD at antenna port ± 4kV ± 8kV ESD at 3.6V in, GND ± 4kV ± 8kV Human Body Model (Test conditions: 1.5kΩ, 100pF) ESD at SIM port ± 8kV ± 15kV ESD at antenna port ± 8kV ± 15kV ESD at 3.6V in, GND ± 8kV ± 15kV Note: Please note that the values may vary with the individual application design. For example, it matters whether or not the application platform is grounded over external devices like a computer or other equipment, such as the Siemens reference application described in Chapter 7.

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 35 of 39 2006-08-21 6. Mechanics 6.1. Mechanical Dimensions HMS1 The below figure shows the top view of HMS1 and provides an overview of the board's mechanical dimensions. Figure 6: HMS1 Top View (prelim.)

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 36 of 39 2006-08-21 Figure 7: HMS1 Dimensions (prelim.)

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 37 of 39 2006-08-21 7. Board-to-Board Application Connector This chapter provides specifications and handling instructions for the 80 pin board-to-board application interface connector used to connect the HMS1 module to the host device. Table 15: Electrical and mechanical characteristics of the 80 pin board-to-board connector Parameter Specification (80-way connector) Number of Contacts 80 Voltage 50V Current Rating 0.5A max per contact Resistance 0.05 Ohm per contact Dielectric Withstanding Voltage 150V RMS AC for 1min Operating Temperature -40°C...+125°C Contact Material brass (CuZn) Insulator Material LCP (= Liquid Crystal Polymer), glass-filled, white Maximum connection cycles 20 (@ 50mOhm max) The mechanical dimensions of the 80 pin board-to-board connector are shown below (as an extract from the datasheet): Figure 8: Mechanical dimensions of 80 pin board-to-board connector

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 38 of 39 2006-08-21 8. Reference Approval 8.1. Reference Equipment for Type Approval The Siemens reference setup submitted to type approve HMS1 consists of the following components: • Siemens HMS1 cellular engine • Development Support Box DSB • SIM card reader integrated on the module • U.FL-R-SMT antenna connector and U.FL-LP antenna cable • PC as MMI Figure 9: Reference equipment for Type Approval

HMS1 Hardware Interface Description Confidential / Preliminary s HMS1_HD_V01.62 Page 39 of 39 2006-08-21 8.2. Compliance with FCC Rules and Regulations The FCC Equipment Authorization Certification for the HMS1 reference application described in Section 8.1 is listed under the FCC identifier QIPHMS1 IC: 267W-HMS1 granted to Siemens AG. The HMS1 reference application registered under the above identifier is certified to be in accordance with the following Rules and Regulations of the Federal Communications Commission (FCC). Power listed is ERP for Part 22 and EIRP for Part 24 “This device contains GSM, GPRS Class10 and EGPRS Class 10 functions in the 900 and 1800MHz Band and the WCDMA function in the FDD1 Band (2100MHz) which are not operational in U.S. Territories. This device is to be used only for mobile and fixed applications. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. Users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure com-pliance. Antennas used for this OEM module must not exceed 8.4dBi gain (GSM 1900) and 2.9dBi (GSM 850) for mobile and fixed operating configurations. This device is approved as a module to be installed in other devices.” The FCC label of the module must be visible from the outside. If not, the host device is required to bear a second label stating, “Contains FCC ID QIPHMS1”. Manufacturers of mobile or fixed devices incorporating HMS1 modules are advised to include instructions according to above mentioned RF exposure statements in their end product user manual. Please note that changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. If the final product is not approved for use in U.S. territories the application manufacturer shall take care that the 850 MHz and 1900 MHz frequency bands be deactivated and that band settings be inaccessible to end users. If these demands are not met (e.g. if the AT interface is accessible to end users), it is the responsibility of the application manufacturer to always ensure that the application be FCC approved regardless of the country it is marketed in.