TC65 Siemens Cellular Engine Version: DocID: 00.450 TC65_HD_V00.
s TC65 Hardware Interface Description Strictly confidential / Draft Document Name: TC65 Hardware Interface Description Version: 00.450 Date: April 20, 2005 DocId: TC65_HD_V00.450 Status: Strictly confidential / Draft 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.
s TC65 Hardware Interface Description Strictly confidential / Draft Contents 0 Document History .........................................................................................................7 1 Introduction ...................................................................................................................8 1.1 Related Documents ...............................................................................................8 1.2 Terms and Abbreviations..........................
s TC65 Hardware Interface Description Strictly confidential / Draft 3.13.1 Speech Processing ................................................................................54 3.13.2 Microphone Circuit .................................................................................54 3.13.2.1 Single-ended Microphone Input .............................................................54 3.13.2.2 Differential Microphone Input .................................................................55 3.13.2.
s TC65 Hardware Interface Description Strictly confidential / Draft Tables Table 1: Overview of operating modes................................................................................... 22 Table 2: Temperature dependent behavior ............................................................................ 33 Table 3: Specifications of battery packs suitable for use with TC65 ...................................... 38 Table 4: Comparison Charge-only and Charge mode...................................
s TC65 Hardware Interface Description Strictly confidential / Draft Figure 27: Never use antenna connector and antenna pad at the same time ....................... 62 Figure 28: Restricted area around antenna pad..................................................................... 62 Figure 29: Mechanical dimensions of U.FL-R-SMT connector............................................... 64 Figure 30: U.FL-R-SMT connector with U.FL-LP-040 plug ....................................................
s TC65 Hardware Interface Description Strictly confidential / Draft 0 Document History Preceding document: "TC65 Hardware Interface Description" Version 00.302 New document: "TC65 Hardware Interface Description" Version 00.450 Chapter What is new Throughout manual IGT line needs to be driven low for at least 400ms 2.1 Updated description of I2C and SPI. 3.1 New chapter: Operating Modes 3.3.1 Added remarks on different operating modes. 3.3.3.3 Added remark on shutdown threshold in IDLE mode.
s TC65 Hardware Interface Description Strictly confidential / Draft 1 Introduction This document describes the hardware of the Siemens TC65 module that connects to the 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. 1.1 [1] [2] [3] [4] [5] Related Documents TC65 AT Command Set TC65 Release Notes 00.
s TC65 Hardware Interface Description Strictly confidential / Draft 1.2 Terms and Abbreviations Abbreviation Description ADC Analog-to-Digital Converter AGC Automatic Gain Control ANSI American National Standards Institute ARFCN Absolute Radio Frequency Channel Number ARP Antenna Reference Point ASC0 / ASC1 Asynchronous Controller.
TC65 Hardware Interface Description Strictly confidential / Draft s Abbreviation Description ESD Electrostatic Discharge ETS European Telecommunication Standard FCC Federal Communications Commission (U.S.
TC65 Hardware Interface Description Strictly confidential / Draft Abbreviation Description PPP Point-to-point protocol PSK Phase Shift Keying PSU Power Supply Unit R&TTE Radio and Telecommunication Terminal Equipment RAM Random Access Memory RF Radio Frequency RMS Root Mean Square (value) ROM Read-only Memory RTC Real Time Clock RTS Request to Send Rx Receive Direction SAR Specific Absorption Rate SELV Safety Extra Low Voltage SIM Subscriber Identification Module SMS Short Me
TC65 Hardware Interface Description Strictly confidential / Draft 1.3 s Type Approval TC65 is designed to comply with the directives and standards listed below. Please note that the product is still in a pre-release state and, therefore, type approval and testing procedures have not yet been completed.
TC65 Hardware Interface Description Strictly confidential / Draft s Requirements of quality IEC 60068 Environmental testing DIN EN 60529 IP codes Compliance with international rules and regulations Manufacturers of mobile or fixed devices incorporating TC65 modules are advised to have their completed product tested and approved for compliance with all applicable national and international regulations.
TC65 Hardware Interface Description Strictly confidential / Draft 1.4 s 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 TC65. 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.
TC65 Hardware Interface Description Strictly confidential / Draft SOS s 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.
TC65 Hardware Interface Description Strictly confidential / Draft 2 Product Concept 2.1 Key Features at a Glance Feature s Implementation General Frequency bands Quad band: GSM 850/900/1800/1900MHz 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 The values stated above are maximum limits.
TC65 Hardware Interface Description Strictly confidential / Draft s Feature Implementation SMS • • • • • Fax Group 3; Class 1 Audio Speech codecs: • Half rate HR (ETS 06.20) • Full rate FR (ETS 06.10) • Enhanced full rate EFR (ETS 06.50/06.60/06.80) • Adaptive Multi Rate AMR Point-to-point MT and MO Cell broadcast Text and PDU mode Storage: SIM card plus 25 SMS locations in mobile equipment Transmission of SMS alternatively over CSD or GPRS. Preferred mode can be user defined.
TC65 Hardware Interface Description Strictly confidential / Draft Feature s Implementation ASC1 • 4-wire, unbalanced asynchronous interface • 1.2kbps to 460kbps • Autobauding TBD • Supports RTS1/CTS1 hardware handshake and software XON/XOFF flow control USB Supports a USB 2.0 Full Speed (12Mbit/s) slave interface. I2 C I2C bus for 7-bit addressing and transmission rates up to 400kbps. Programmable with AT^SSPI command. Alternatively, all pins of the I²C interface are configurable as SPI.
s TC65 Hardware Interface Description Strictly confidential / Draft 2.2 TC65 System Overview Antenna Interface TC65 DAC Application Interface ADC USB USB Host I2C SPI SPI Slave I2C Slave SIM SIM card 10 x GPIO ASC1 ASC0 (Modem) UART Digital Audio Analog Audio Charge Power Supply Audio Codec Headphones or Headset Charging circuit Charger User Application Figure 1: TC65 system overview TC65_HD_V00.450 Page 19 of 96 20.04.
s TC65 Hardware Interface Description Strictly confidential / Draft 2.
TC65 Hardware Interface Description Strictly confidential / Draft 3 s Application Interface TC65 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: • • • • • • • • • • Power supply - see Section 3.1 Charger interface – see Section 3.5 SIM interface - see Section 3.8 Serial interface ASC0 - see Section 3.9 Serial interface ASC1 - see Section 3.
s TC65 Hardware Interface Description Strictly confidential / Draft 3.1 Operating Modes The table below briefly summarizes the various operating modes referred to in the following chapters. Table 1: Overview of operating modes Normal operation POWER DOWN TC65_HD_V00.450 GSM / GPRS SLEEP Various power save modes set with AT+CFUN command. Software is active to minimum extent. If the module was registered to the GSM network in IDLE mode, it is registered and paging with the BTS in SLEEP mode, too.
TC65 Hardware Interface Description Strictly confidential / Draft Airplane mode s Airplane mode shuts down the radio part of the module, causes the module to log off from the GSM/GPRS network and disables all AT commands whose execution requires a radio connection. Airplane mode can be controlled by using the AT commands AT^SCFG and AT+CALA: • With AT^SCFG=MEopMode/Airplane/OnStart the module can be configured to enter the Airplane mode each time when switched on or reset.
TC65 Hardware Interface Description Strictly confidential / Draft 3.2 s Power Supply TC65 needs to be connected to a power supply at the B2B connector (5 pins each BATT+ and GND). The power supply of TC65 has to be a single voltage source at BATT+. It must be able to provide the peak current during the uplink transmission. All the key functions for supplying power to the device are handled by the power management section of the analog controller.
s TC65 Hardware Interface Description Strictly confidential / Draft 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.
TC65 Hardware Interface Description Strictly confidential / Draft 3.3 s Power Up / Power Down Scenarios In general, be sure not to turn on TC65 while it is beyond the safety limits of voltage and temperature stated in Chapter 5. TC65 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.
s TC65 Hardware Interface Description Strictly confidential / Draft If configured to a fix baud rate (AT+IPR≠0), the module will send the URC “^SYSSTART” or “^SYSSTART AIRPLANE MODE” to notify that it is ready to operate. If autobauding is enabled (AT+IPR=0) there will be no notification. BATT+ tmin = 400ms IGT HiZ PWR_IND 120ms EMERG_RST VEXT TXD0/TXD1/RTS0/RST1/DTR0 (driven by the application) CTS0/CTS1/DSR0/DCD0 Undefined Serial interfaces ASC0 and ASC1 Active ca.
s TC65 Hardware Interface Description Strictly confidential / Draft BATT+ tmin = 400ms HiZ IGT PWR_IND 120ms EMERG_RST VEXT TXD0/TXD1/RTS0/RST1/DTR0 (driven by the application) CTS0/CTS1/DSR0/DCD0 Undefined Serial interfaces ASC0 and ASC1 Active ca. 500 ms Figure 6: Power-on with IGT held low before switching on operating voltage at BATT+ 3.3.1.2 Turn on TC65 Using the VCHARGE Signal As detailed in Section 3.5.7, the charging adapter can be connected regardless of the module’s operating mode.
TC65 Hardware Interface Description Strictly confidential / Draft 3.3.1.3 s Reset TC65 via AT+CFUN Command To reset and restart the TC65 module use the command AT+CFUN. You can enter AT+CFUN=,1 or AT+CFUN=x,1, where x may be in the range from 0 to 9. See [1] for details. If configured to a fix baud rate (AT+IPR≠0), the module will send the URC “^SYSSTART” or “^SYSSTART AIRPLANE MODE” to notify that it is ready to operate. If autobauding is enabled (AT+IPR=0) there will be no notification.
TC65 Hardware Interface Description Strictly confidential / Draft 3.3.2 s Turn off TC65 TC65 can be turned off as follows: • Normal shutdown: Software controlled by AT^SMSO command • Automatic shutdown: Takes effect if board or battery temperature is out of range or if undervoltage or overvoltage conditions occur. 3.3.2.1 Turn off TC65 Using AT Command The best and safest approach to powering down TC65 is to issue the AT^SMSO command.
s TC65 Hardware Interface Description Strictly confidential / Draft PWR_IND See note 1 VEXT CTS0/CTS1/DSR0/DTR0 TXD0/TXD1/RTS0/RTS1/DTR0 (driven by the application) Active Undefined Serial interfaces ASC0 and ASC1 Figure 7: Signal states during turn-off procedure Note 1: Depending on capacitance load from host application 3.3.2.
TC65 Hardware Interface Description Strictly confidential / Draft 3.3.3 s Automatic Shutdown Automatic shutdown takes effect if: • the TC65 board is exceeding the critical limits of overtemperature or undertemperature • the battery is exceeding the critical limits of overtemperature or undertemperature • undervoltage or overvoltage is detected See Charge-only mode described in section 3.5.7 for exceptions.
TC65 Hardware Interface Description Strictly confidential / Draft s Table 2: Temperature dependent behavior Sending temperature alert (15s after TC65 start-up, otherwise only if URC presentation enabled) ^SCTM_A: 1 Caution: Tamb of battery close to overtemperature limit. ^SCTM_B: 1 Caution: Tamb of board close to overtemperature limit. ^SCTM_A: -1 Caution: Tamb of battery close to undertemperature limit. ^SCTM_B: -1 Caution: Tamb of board close to undertemperature limit.
TC65 Hardware Interface Description Strictly confidential / Draft 3.3.3.4 s Undervoltage Shutdown if no Battery NTC is Present The undervoltage protection is also effective in applications, where no NTC connects to the BATT_TEMP terminal. Thus, you can take advantage of this feature even though the application handles the charging process or TC65 is fed by a fixed supply voltage. All you need to do is executing the write command AT^SBC= which automatically enables the presentation of URCs.
TC65 Hardware Interface Description Strictly confidential / Draft 3.4 s Automatic GPRS Multislot Class Change Temperature control is also effective for operation in GPRS Multislot Class 10 and GPRS Multislot Class 12.
TC65 Hardware Interface Description Strictly confidential / Draft 3.5 s Charging Control TC65 integrates a charging management for rechargeable Lithium Ion and Lithium Polymer batteries. You can skip this chapter if charging is not your concern, or if you are not using the implemented charging algorithm. The following sections contain an overview of charging and battery specifications.
s TC65 Hardware Interface Description Strictly confidential / Draft 3.5.3 Battery Pack Requirements The charging algorithm has been optimized for rechargeable Lithium batteries that meet the characteristics listed below and in Table 3. It is recommended that the battery pack you want to integrate into your TC65 application is compliant with these specifications. This ensures reliable operation, proper charging and, particularly, allows you to monitor the battery capacity using the AT^SBC command.
TC65 Hardware Interface Description Strictly confidential / Draft s Table 3: Specifications of battery packs suitable for use with TC65 Battery type Rechargeable Lithium Ion or Lithium Polymer battery Nominal voltage 3.6V / 3.7V Capacity Recommended: 1000mAh to 1200mAh Minimum: 500mAh NTC 10kΩ ± 5% @ 25°C approx. 5kΩ @ 45°C approx. 26.2kΩ @ 0°C B value range: B (25/85)=3423K to B =3435K ± 3% Overcharge detection voltage 4.325 ± 0.025V Overdischarge detection voltage 2.5 ± 0.
TC65 Hardware Interface Description Strictly confidential / Draft 3.5.5 s Charger Requirements For using the implemented charging algorithm and the reference charging circuit recommended in [4] and in Figure 38, the charger has to meet the following requirements: Output voltage: 5.2Volts ±0.2V (stabilized voltage) Output current: 500mA Chargers with a higher output current are acceptable, but please consider that only 500mA will be applied when a 0.
TC65 Hardware Interface Description Strictly confidential / Draft 3.5.7 s Operating Modes during Charging Of course, the battery can be charged regardless of the engine's operating mode. When the GSM module is in Normal mode (SLEEP, IDLE, TALK, GPRS IDLE or GPRS DATA mode), it remains operational while charging is in progress (provided that sufficient voltage is applied). The charging process during the Normal mode is referred to as Charge mode.
s TC65 Hardware Interface Description Strictly confidential / Draft Table 4: Comparison Charge-only and Charge mode Charge-only mode Charge mode How to activate mode Description of mode Connect charger to charger input of host • Battery can be charged while GSM module application charging circuit and module’s remains operational and registered to the VCHARGE pin while TC65 is GSM network. • operating, e.g.
s TC65 Hardware Interface Description Strictly confidential / Draft 3.
s TC65 Hardware Interface Description Strictly confidential / Draft 3.7 RTC Backup The internal Real Time Clock of TC65 is supplied from a separate voltage regulator in the analog controller which is also active when TC65 is in POWER DOWN status. An alarm function is provided that allows to wake up TC65 to Airplane mode without logging on to the GSM network.
TC65 Hardware Interface Description Strictly confidential / Draft 3.8 s SIM Interface The baseband processor has an integrated SIM interface compatible with the ISO 7816 IC Card standard. This is wired to the host interface (board-to-board connector) in order to be connected to an external SIM card holder. Six pins on the board-to-board connector are reserved for the SIM interface. The SIM interface supports 3V and 1.8V SIM cards.
s TC65 Hardware Interface Description Strictly confidential / Draft 3.9 Serial Interface ASC0 TC65 offers an 8-wire unbalanced, asynchronous modem interface ASC0 conforming to ITUT V.24 protocol DCE signalling. The electrical characteristics do not comply with ITU-T V.28. The significant levels are 0V (for low data bit or active state) and 2.9V (for high data bit or inactive state). For electrical characteristics please refer to Table 17. TC65 is designed for use as a DCE.
s TC65 Hardware Interface Description Strictly confidential / Draft Table 8: DCE-DTE wiring of ASC0 V.24 circuit DCE DTE Pin function Signal direction Pin function Signal direction 103 TXD0 Input TXD Output 104 RXD0 Output RXD Input 105 RTS0 Input RTS Output 106 CTS0 Output CTS Input 108/2 DTR0 Input DTR Output 107 DSR0 Output DSR Input 109 DCD0 Output DCD Input 125 RING0 Output /RING Input TC65_HD_V00.450 Page 46 of 96 20.04.
s TC65 Hardware Interface Description Strictly confidential / Draft 3.10 Serial Interface ASC1 TC65 offers a 4-wire unbalanced, asynchronous modem interface ASC1 conforming to ITU-T V.24 protocol DCE signalling. The electrical characteristics do not comply with ITU-T V.28. The significant levels are 0V (for low data bit or active state) and 2.9V (for high data bit or inactive state). For electrical characteristics please refer to Table 17. TC65 is designed for use as a DCE.
s TC65 Hardware Interface Description Strictly confidential / Draft 3.11 USB Interface TC65 supports a USB 2.0 Full Speed (12Mbit/s) device interface. It is primarily intended for use as command and data interface and for downloading firmware. The USB I/O-pins are capable of driving the signal at min 3.0V. They are 5V I/O compliant. To properly connect the module’s USB interface to the host a USB 2.0 compatible connector is required.
