AC65/AC75 Siemens Cellular Engines Version: DocID: 00.372 AC65/AC75_hd_v00.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Document Name: AC65/AC75 Hardware Interface Description Version: 00.372 Date: August 03, 2006 DocId: AC65/AC75_hd_v00.372 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Contents 0 Document History .........................................................................................................7 1 Introduction ...................................................................................................................9 1.1 Related Documents ...............................................................................................9 1.2 Terms and Abbreviations........................
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 s RTC Backup ........................................................................................................52 SIM Interface .......................................................................................................53 3.9.1 Installation Advice ..................................................................................54 Serial Interface ASC0 ....................
AC65/AC75 Hardware Interface Description Confidential / Preliminary 9 s Appendix....................................................................................................................113 9.1 List of Parts and Accessories ............................................................................113 9.2 Fasteners and Fixings for Electronic Equipment ...............................................115 9.2.1 Fasteners from German Supplier ETTINGER GmbH ..........................
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Figures Figure 1: AC65/AC75 system overview.................................................................................. 21 Figure 2: AC65/AC75 block diagram...................................................................................... 22 Figure 3: Power supply limits during transmit burst................................................................ 27 Figure 4: Position of the reference points BATT+ and GND ............
AC65/AC75 Hardware Interface Description Confidential / Preliminary 0 s Document History Preceding document: "AC75 Hardware Interface Description" Version 00.251 New document: "AC65/AC75 Hardware Interface Description" Version 00.372 Chapter What is new Throughout document Added new product: AC65 module 1 Added AC65 and general statement on difference between AC65 and AC75. 1.3 Updated list of standards. 1.3.1 Every portable mobile shall have an FCC Grant and IC Certificate of its own. 1.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Chapter What is new 3.3.1.2 New chapter: Configuring the IGT Line for Use as ON/OFF Switch 3.3.4.1 Revised Table 7: Temperature dependent behavior. 3.3.4.2, 3.3.4.3 Changed description. Added new section. 3.4 Minor text change. 3.3.1.3, 3.5.6, 3.7 To change from Charge-only mode to Normal mode the IGT line must be pulled low for at least 1s and then released. High state of IGT lets AC75 enter Normal mode. 3.5.6, 3.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 1 s Introduction This document applies to the following Siemens products: • AC65 Module • AC75 Module The document describes the hardware of the AC65 and the AC75, both designed to connect 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 1.2 s 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Abbreviation Description ESD Electrostatic Discharge ETS European Telecommunication Standard FCC Federal Communications Commission (U.S.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 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
AC65/AC75 Hardware Interface Description Confidential / Preliminary 1.3 s Type Approval AC65/AC75 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 1.3.1 s 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 AC65/AC75 based applications to be evaluated and approved for compliance with national and/or international regulations.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 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 AC65/AC75. 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 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.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 2 Product Concept 2.
AC65/AC75 Hardware Interface Description Confidential / Preliminary Feature s Implementation CSD • V.110, RLP, non-transparent • 2.4, 4.8, 9.6, 14.4kbps • USSD PPP-stack for GPRS data transfer 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Feature Implementation Firmware update Generic update from host application over ASC0, ASC1 or USB. Over-the-air (OTA) firmware update is possible via SPI interface. Interfaces 2 serial interfaces ASC0: • 8-wire modem interface with status and control lines, unbalanced, asynchronous • Fixed bit rates: 300 bps to 460,800 bps • Autobauding: 1,200 bps to 460,800 bps • RTS0/CTS0 and XON/XOFF flow control.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Feature Implementation GPIO 10 I/O pins of the application interface programmable as GPIO. Programming is done via AT commands. Alternatively, GPIO pin10 is configurable as pulse counter. Pulse counter Pulse counter for measuring pulse rates from 0 to 1000 pulses per second. If the pulse counter is active the GPIO10 pin is not available. DAC output Digital-to-Analog Converter which can provide a PWM signal.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 2.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3 s Application Interface AC65/AC75 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 Chapter 3.1 Charger interface – see Chapter 3.5 SIM interface - see Chapter 3.9 Serial interface ASC0 - see Chapter 3.10 Serial interface ASC1 - see Chapter 3.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.1 s Operating Modes The table below briefly summarizes the various operating modes referred to in the following chapters. Table 5: Overview of operating modes Normal operation POWER DOWN 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.2 s Power Supply AC65/AC75 needs to be connected to a power supply at the B2B connector (5 pins each BATT+ and GND). The power supply of AC65/AC75 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 AC65/AC75 Hardware Interface Description Confidential / Preliminary 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.3 s Power-Up / Power-Down Scenarios In general, be sure not to turn on AC65/AC75 while it is beyond the safety limits of voltage and temperature stated in Chapter 5.1. AC65/AC75 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 AC65/AC75 Hardware Interface Description Confidential / Preliminary Assertion of CTS indicates that the module is ready to receive data from the host application. In addition, if configured to a fixed bit rate (AT+IPR≠0), the module will send the URC “^SYSSTART” or “^SYSSTART AIRPLANE MODE” which notifies the host application that the first AT command can be sent to the module. The duration until this URC is output varies with the SIM card and may take a couple of seconds.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 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 Defined Interface pins ca.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s 3.3.1.2 Configuring the IGT Line for Use as ON/OFF Switch The IGT line can be configured for use in two different switching modes: You can set the IGT line to switch on the module only, or to switch it on and off. The switching mode is determined by the parameter “MEShutdown/OnIgnition” of the AT^SCFG command. This approach is useful for application manufacturers who wish to have an ON/OFF switch installed on the host device.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.3.1.3 s Turn on AC65/AC75 Using the VCHARGE Signal As detailed in Section 3.5.6, the charging adapter can be connected regardless of the module’s operating mode. If the charger is connected to the charger input of the external charging circuit and the module’s VCHARGE pin while AC65/AC75 is off, and the battery voltage is above the undervoltage lockout threshold, processor controlled fast charging starts (see Section 3.5.5).
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.3.1.5 s Reset or Turn off AC65/AC75 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 AC65/AC75 does not respond, if reset or shutdown via AT command fails.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.3.2 Signal States after Startup Table 6 describes the various states each interface pin passes through after startup and during operation. As shown in Figure 5 and Figure 6 the pins are in undefined state while the module is initializing. Once the startup initialization has completed, i.e. when CTS is high and the software is running, all pins are in defined state.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Abbreviations used in Table 6: L = Low output level H = High output level I = Input O = Output AC65/AC75_hd_v00.372 PD = Pull down with min +15µA and max. +100µA PD(…k) = Fix pull down resistor PU = Pull up with min -15µA and max.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.3.3 s Turn off AC65/AC75 AC65/AC75 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. 3.3.3.1 Turn off AC65/AC75 Using AT Command The best and safest approach to powering down AC65/AC75 is to issue the AT^SMSO command.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary PWR_IND See note 1 VEXT CTS0/CTS1/DSR0/DTR0 TXD0/TXD1/RTS0/RTS1/DTR0 (driven by the application) Defined Undefined Interface pins Figure 8: Signal states during turn-off procedure Note 1: Depending on capacitance load from host application 3.3.3.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.3.3.3 s Turn on/off AC65/AC75 Applications with Integrated USB In a Windows environment, the USB COM port emulation causes the USB port of AC65/AC75 to appear as a virtual COM port (VCOM port). The VCOM port emulation is only present when Windows can communicate with the module, and is lost when the module shuts down.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.3.4 s Automatic Shutdown Automatic shutdown takes effect if: • the AC65/AC75 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 3.5.6 for exceptions.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Table 7: Temperature dependent behavior Sending temperature alert (2min after AC65/AC75 start-up, otherwise only if URC presentation enabled) ^SCTM_A: 1 Caution: Battery close to overtemperature limit. ^SCTM_B: 1 Caution: Bboard close to overtemperature limit. ^SCTM_A: -1 Caution: Battery close to undertemperature limit. ^SCTM_B: -1 Caution: Board close to undertemperature limit.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s The message will be reported, for example, when you attempt to make a call while the voltage is close to the shutdown threshold of 3.2V and further power loss is caused during the transmit burst. In IDLE mode, the shutdown threshold is the sum of the module’s minimum supply voltage (3.2V) and the value of the maximum voltage drop resulting from earlier calls.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.4 s Automatic EGPRS/GPRS Multislot Class Change Temperature control is also effective for operation in EGPRS Multislot Class 10 (AC75 only), GPRS Multislot Class 10 and GPRS Multislot Class 12.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.5 s Charging Control AC65/AC75 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 AC65/AC75 Hardware Interface Description Confidential / Preliminary 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 8. It is recommended that the battery pack you want to integrate into your AC65/AC75 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Table 8: Specifications of battery packs suitable for use with AC65/AC75 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.5.5 s Implemented Charging Technique If all requirements listed above are met (appropriate external charging circuit of application, battery pack, charger, AT^SBC settings) then charging is enabled in various stages depending on the battery condition: Trickle charging: • Trickle charge current flows over the VCHARGE line.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.5.6 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 AC65/AC75 Hardware Interface Description Confidential / Preliminary Table 10: 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 AC65/AC75 is GSM network. • operating, e.g.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.6 Power Saving Intended for power saving, SLEEP mode reduces the functionality of the AC65/AC75 to a minimum and thus minimizes the current consumption. Settings can be made using the AT+CFUN command. For details see [1]. SLEEP mode falls in two categories: • NON-CYCLIC SLEEP mode: AT+CFUN = 0 • CYCLIC SLEEP modes, AT+CFUN = 7 or 9. The functionality level AT+CFUN=1 is where power saving is switched off.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.6.2 Timing of the CTSx Signal in CYCLIC SLEEP Mode 7 Figure 11 illustrates the CTSx signal timing in CYCLIC SLEEP mode 7 (CFUN=7). Beginning of power saving CTSx 0.9...2.7 s 2s 1st character 0.9...2.7 s Last character AT interface disabled AT interface enabled Figure 11: Timing of CTSx signal (if CFUN= 7) With regard to programming or using timeouts, the UART must take the varying CTS inactivity periods into account. 3.6.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.8 RTC Backup The internal Real Time Clock of AC65/AC75 is supplied from a separate voltage regulator in the analog controller which is also active when AC65/AC75 is in POWER DOWN status. An alarm function is provided to wake up AC65/AC75 to Airplane mode without logging on to the GSM network.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.9 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.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.9.1 s Installation Advice The total cable length between the board-to-board connector pins on AC65/AC75 and the pins of the external SIM card holder must not exceed 100mm in order to meet the specifications of 3GPP TS 51.010-1 and to satisfy the requirements of EMC compliance. To avoid possible cross-talk from the CCCLK signal to the CCIO signal be careful that both lines are not placed closely next to each other.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.10 Serial Interface ASC0 AC65/AC75 offers an 8-wire unbalanced, asynchronous modem interface ASC0 conforming to ITU-T V.24 protocol DCE signalling. The electrical characteristics do not comply with ITUT 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 26. AC65/AC75 is designed for use as a DCE.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Table 13: 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 AC65/AC75_hd_v00.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.11 Serial Interface ASC1 The ASC1 interface is available as 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 26. AC65/AC75 is designed for use as a DCE.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.12 USB Interface AC65/AC75 supports a USB 2.0 Full Speed (12Mbit/s) device interface. It can be operated on a USB 2.0 Full Speed or High Speed root hub (a PC host), but not on a generic USB 2.0 High Speed hub which translates High Speed (480 Mbit/s/) to Full Speed (12 Mbit/s). The USB port has different functions depending on whether or not Java is running.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.13 I2C Interface I2C is a serial, 8-bit oriented data transfer bus for bit rates up to 400kbps in Fast mode. It consists of two lines, the serial data line I2CDAT and the serial clock line I2CCLK. The AC65/AC75 module acts as a single master device, e.g. the clock I2CCLK is driven by module. I2CDAT is a bi-directional line.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Application GSM module VEXT Rp I2CDAT I2CCLK GND Rp I2CDAT I2CCLK GND Figure 20: I2C interface connected to VEXT line of AC65/AC75 Note: Good care should be taken when creating the PCB layout of the host application: The traces of I2CCLK and I2CDAT should be equal in length and as short as possible. AC65/AC75_hd_v00.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.14 s SPI Interface The SPI (serial peripheral interface) is a synchronous serial interface for control and data transfer between the AC65/AC75 module and the connected application. Only one application can be connected to the module’s SPI. The interface supports transmission rates up to 6.5Mbit/s. It consists of four lines, the two data lines SPIDI/SPIDO, the clock line SPICLK and the chip select line SPICS.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Clock phase SPI MODE 0 SPI MODE 1 SPICS SPICLK SPICLK SPIDO SPIDO SPIDI SPIDI Clock polarity SPICS Sample Sample SPI MODE 2 SPI MODE 3 SPICS SPICS SPICLK SPICLK SPIDO SPIDO SPIDI SPIDI Sample Sample Figure 22: Characteristics of SPI modes AC65/AC75_hd_v00.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.15 Audio Interfaces AC65/AC75 comprises three audio interfaces available on the board-to-board connector: • Two analog audio interfaces, both with balanced or single-ended inputs/outputs. • Serial digital audio interface (DAI) designed for PCM (Pulse Code Modulation). This means you can connect up to three different audio devices, although only one interface can be operated at a time.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.15.1 s Speech Processing The speech samples from the ADC or DAI are handled by the DSP of the baseband controller to calculate e.g. amplifications, sidetone, echo cancellation or noise suppression depending on the configuration of the active audio mode. These processed samples are passed to the speech encoder.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.15.2.1 Single-ended Microphone Input Figure 24 as well as Figure 46 show an example of how to integrate a single-ended microphone input. RA = typ. 2k RB = typ. 5k RVMIC = typ. 470Ohm VMIC RA RA RVMIC Ck = typ. 100nF CF = typ. 22µF MICPx VMIC = typ. 2.5V VBias CF GSM module MICNx RB Vbias = 1.0V … 1.6V, typ. 1.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.15.2.2 Differential Microphone Input Figure 25 shows a differential solution for connecting an electret microphone. RA = typ. 1k RVMIC = 470Ohm VMIC RVMIC CK = typ. 100nF CF = typ. 22µF RA MICPx CF VMIC = typ. 2.5V GSM module Vbias = 1.0V … 1.6V, typ. 1.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.15.2.3 s Line Input Configuration with OpAmp Figure 26 shows an example of how to connect an opamp into the microphone circuit. RA = typ. 47k RVMIC = 470Ohm VMIC RA CK RVMIC Ck = typ. 100nF CF = typ. 22µF MICPx ~ VMIC = typ. 2.5V RA CK GSM module MICNx CF Vbias = typ. ½ VMIC = 1.25V VBias AGND Figure 26: Line input configuration with OpAmp The AC source (e.g.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.15.3 s Loudspeaker Circuit The GSM module comprises two analog speaker outputs: EP1 and EP2. Output EP1 is able to drive a load of 8Ohms while the output EP2 can drive a load of 32Ohms. Each interface can be connected in differential and in single ended configuration. Figure 27 shows an example of a differential loudspeaker configuration. Loudspeaker impedance EPP1/EPN1 ZL = typ. 8Ohm EPP2/EPN2 ZL = typ.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.15.4 Digital Audio Interface (DAI) The DAI can be used to connect audio devices capable of PCM (Pulse Code Modulation) or for type approval. The following chapters describe the PCM interface functionality. The PCM functionality allows the use of a codec like for example the MC145483. This codec replaces the analog audio inputs and outputs during a call, if digital audio is selected by AT^SAIC.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Table 16 shows the assignment of the DAI0…6 pins to the PCM interface signals. To avoid hardware conflicts different pins are used as inputs and outputs for frame sync and clock signals in master or slave operation. The table shows also which pin is used for master or slave. The data pins (TXDAI and RXDAI) however are used in both modes. Unused inputs have to be tied to GND, unused outputs must be left open.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary The timing of a PCM short frame is shown in Figure 29. The 16-bit TXDAI and RXDAI data are transferred simultaneously in both directions during the first 16 clock cycles after the frame sync pulse. The duration of a frame sync pulse is one BITCLK period, starting at the rising edge of BITCLK. TXDAI data is shifted out at the next rising edge of BITCLK. RXDAI data (i.e.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.15.4.2 Slave Mode In slave mode the PCM interface is controlled by an external bit clock and an external frame sync signal applied to the BCLKIN and FSIN pins and delivered either by the connected codec or another source. The bit clock frequency has to be in the range of 256kHz -125ppm to 512kHz +125ppm.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 125 µs BCLKIN FSIN TXDAI MSB MSB RXDAI 14 13 12 2 1 14 13 12 2 1 LSB MSB LSB MSB Figure 32: Slave PCM timing, short frame selected 125 µs BCLKIN FSIN TXDAI MSB RXDAI MSB 14 13 12 2 1 14 13 12 2 1 LSB MSB LSB MSB Figure 33: Slave PCM timing, long frame selected AC65/AC75_hd_v00.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.16 s GPIO Interface The AC65/AC75 has 10 GPIOs for external hardware devices. Each GPIO can be configured for use as input or output. All settings are AT command controlled. The GIPO related AT commands are the following: AT^SPIO, AT^SCPIN, AT^SCPOL, AT^SCPORT, AT^SDPORT, AT^SGIO, AT^SSIO. A detailed description can be found in [1]. 3.16.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.17 Control Signals 3.17.1 Synchronization Signal s The synchronization signal serves to indicate growing power consumption during the transmit burst. The signal is generated by the SYNC pin. Please note that this pin can adopt three different operating modes which you can select by using the AT^SSYNC command: the mode AT^SSYNC=0 described below, and the two LED modes AT^SSYNC=1 or AT^SSYNC=2 described in [1] and Section 3.17.2.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.17.2 s Using the SYNC Pin to Control a Status LED As an alternative to generating the synchronization signal, the SYNC pin can be configured to drive a status LED that indicates different operating modes of the AC65/AC75 module. To take advantage of this function the LED mode must be activated with the AT^SSYNC command and the LED must be connected to the host application.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 3.17.3 Behavior of the RING0 Line (ASC0 Interface only) The RING0 line is available on the first serial interface ASC0 (see also Chapter 3.10). The signal serves to indicate incoming calls and other types of URCs (Unsolicited Result Code). Although not mandatory for use in a host application, it is strongly suggested that you connect the RING0 line to an interrupt line of your application.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 4 Antenna Interface The RF interface has an impedance of 50Ω. AC65/AC75 is capable of sustaining a total mismatch at the antenna connector 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.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 4.1 Antenna Diagnostic The antenna diagnostic allows the customer to check the presence and the connection status of the antenna by using the AT^SAD command. A description of the AT^SAD command can be found in [1]. To properly detect the antenna and verify its connection status the antenna feed point must have a DC resistance RANT of 9kΩ (±3kΩ). Any lower or higher resistance from 1kΩ to 6kΩ or 12kΩ to 40kΩ gives an undefined result.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 4.2 s Antenna Connector AC65/AC75 uses a subminiature coaxial antenna connector type SMP MIL-Std 348-A supplied from Rosenberger. Table 19: Product specifications of Rosenberger SMP connector Item Specification Conditions Material and finish Center contact Brass 0.8 µm gold plating over 2-4 µm NiP plating Outer contact Brass 0.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Figure 39: Datasheet of Rosenberger SMP MIL-Std 348-A connector AC65/AC75_hd_v00.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 5 Electrical, Reliability and Radio Characteristics 5.1 Absolute Maximum Ratings The absolute maximum ratings stated in Table 20 are stress ratings under any conditions. Stresses beyond any of these limits will cause permanent damage to AC65/AC75. The power supply shall be compliant with the SELV safety standard defined in EN60950. The supply voltage must be limited according to Table 20.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 5.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 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 24: Storage conditions Type Air temperature: Humidity relative: Air pressure: Condition Unit Reference Low -40 °C ETS 300 019-2-1: T1.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 5.4 s Reliability Characteristics The test conditions stated below are an extract of the complete test specifications. Table 25: Summary of reliability test conditions Type of test Conditions Standard Vibration Frequency range: 10-20Hz; acceleration: 3.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 5.5 Pin Assignment and Signal Description The Molex board-to-board connector on AC65/AC75 is an 80-pin double-row receptacle. The names and the positions of the pins can be seen from Figure 1 which shows the top view of AC65/AC75.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Please note that the reference voltages listed in Table 26 are the values measured directly on the AC65/AC75 module. They do not apply to the accessories connected. Table 26: Signal description Function Signal name Power supply BATT+ IO I Signal form and level Comment VImax = 4.5V VItyp = 3.8V VImin = 3.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Function Signal name IO Signal form and level Comment Power indicator PWR_IND O VIHmax = 10V VOLmax = 0.4V at Imax = 2mA 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 pullup resistor. Low state of the open collector indicates that the module is on. Vice versa, high level notifies the Powerdown mode.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Function Signal name IO Signal form and level Comment Synchronization SYNC O VOLmax = 0.3V at I = 0.1mA VOHmin = 2.3V at I = -0.1mA VOHmax = 3.05V There are two alternative options for using the SYNC pin: a) Indicating increased current consumption during uplink transmission burst. Note that the timing of the signal is different during handover. b) Driving a status LED to indicate different operating modes of AC65/AC75.
AC65/AC75 Hardware Interface Description Confidential / Preliminary Function Signal name Signal form and level Comment I RI ≈ 100kΩ VILmax = 0.6V at I = -25µA VIHmin = 2.1V at I = -10µA VOmax = 3.05V CCIN = Low, SIM card holder closed CCRST O RO ≈ 47Ω VOLmax = 0.25V at I = +1mA VOHmin = 2.5V at I = -0.5mA VOHmax = 2.95V CCIO I/O RI ≈ 4.7kΩ VILmax = 0.75V VILmin = -0.3V VIHmin = 2.1V VIHmax = CCVCCmin + 0.3V = 3.05V SIM interface CCIN specified for use with 3V SIM card IO RO ≈ 100Ω VOLmax = 0.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Function Signal name IO Signal form and level Comment I2C interface I2CCLK _SPICLK O VOLmax = 0.2V at I = 2mA VOHmin = 2.55V at I = -0.5mA VOHmax = 3.05V I2C interface is only available if the two pins are not used as SPI interface. I2CDAT_SPIDO I/O VOLmax = 0.2V at I = 2mA VILmax = 0.8V VIHmin = 2.15V VIHmax = VEXTmin + 0.3V = 3.05V USB VUSB_IN USB_DN USB_DP I VINmin = 4.0V VINmax = 5.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Function Signal name IO Signal form and level Comment Digital Analog Converter DAC_OUT O VOLmax = 0.2V at I = 2mA VOHmin = 2.55V at I = -0.5mA VOHmax = 3.05V PWM signal which can be smoothed by an external filter. Use the AT^SWDAC command to open and configure the DAC_OUT output. Digital Audio interface DAI0 O DAI1 I See Table 16 for details. If unused keep pins open. DAI2 O VOLmax = 0.2V at I = 2mA VOHmin = 2.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 5.6 Power Supply Ratings Table 27: Power supply ratings Parameter Description Conditions Min BATT+ Directly measured at reference point TP BATT+ and TP GND, see chapter 3.2.2 3.3 Supply voltage Typ 3.8 Max Unit 4.5 V 400 mV @ f<200kHz 50 mV @ f>200kHz 2 mV Voltage must stay within the min/max values, including voltage drop, ripple, spikes.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Table 28: Current consumption during Tx burst for GSM 850MHz and GSM 900MHz Mode GSM call GPRS Class 8 GPRS Class10 GPRS Class 12 EGPRS Class 8 EGPRS Class 10 Timeslot configuration 1Tx / 1Rx 1Tx / 4Rx 2Tx / 3Rx 4Tx / 1Rx 1Tx / 4Rx 2Tx / 3Rx RF power nominal 2W (33dBm) 2W (33dBm) 2W (33dBm) 1W (30dBm) 1W (30dBm) 0.5W (27dBm) 0.5W (27dBm) 0.5W (27dBm) 0.25W (24dBm) = 1 ...
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Table 29: Current consumption during Tx burst for GSM 1800MHz and GSM 1900MHz Mode Timeslot configuration RF power nominal GSM call GPRS Class 8 GPRS Class10 GPRS Class 12 1Tx / 1Rx 1Tx / 4Rx 2Tx / 3Rx 1W (30dBm) 1W (30dBm) 1W (30dBm) 0.5W (27dBm) 0.5W (27dBm) = 1 ... 3 = 1 = 2 or 3 Radio output power = 1 ...
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 5.7 Electrical Characteristics of the Voiceband Part 5.7.1 Setting Audio Parameters by AT Commands The audio modes 2 to 6 can be adjusted according to the parameters listed below. Each audio mode is assigned a separate set of parameters. Table 30: Audio parameters adjustable by AT command Parameter Influence to Range Gain range Calculation inBbcGain MICP/MICN analogue amplifier gain of baseband controller before ADC 0...7 0.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 5.7.2 Audio Programming Model The audio programming model shows how the signal path can be influenced by varying the AT command parameters. The parameters inBbcGain and inCalibrate can be set with AT^SNFI. All the other parameters are adjusted with AT^SNFO.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 5.7.3 Characteristics of Audio Modes The electrical characteristics of the voiceband part depend on the current audio mode set with the AT^SNFS command. All values are noted for default gains e.g. all parameters of AT^SNFI and AT^SNFO are left unchanged. Table 31: Voiceband characteristics (typical) Audio mode no.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 5.7.4 Voiceband Receive Path Test conditions: • The values specified below were tested to 1kHz with default audio mode settings, unless otherwise stated. • Default audio mode settings are: mode=5 for EPP1 to EPN1 and mode=6 for EPP2 to EPN2, inBbcGain=0, inCalibrate=32767, outBbcGain=0, OutCalibrate=16384 (volume=4) or OutCalibrate=11585 (volume=3), sideTone=0.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Parameter Min Typ Max Unit -34 dB Test condition / remark Frequency Response16 0Hz - 100Hz 200Hz 300Hz - 3350Hz 3400Hz 4000Hz ≥4400Hz -1.1 0.1 -0.2 -0.7 -39 -75 gs = gain setting 5.7.5 Voiceband Transmit Path Test conditions: • The values specified below were tested to 1kHz and default settings of audio modes, unless otherwise stated.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 5.8 Air Interface Test conditions: All measurements have been performed at Tamb= 25°C, VBATT+ nom = 4.0V. The reference points used on AC65/AC75 are the BATT+ and GND contacts (test points are shown in Figure 4).
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 5.9 Electrostatic Discharge The GSM engine is not protected against Electrostatic Discharge (ESD) in general. Consequently, it is subject to ESD handling precautions that typically apply to ESD sensitive components. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any application that incorporates a AC65/AC75 module.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 6 Mechanics 6.1 Mechanical Dimensions of AC65/AC75 Figure 42 shows the top view of AC65/AC75 and provides an overview of the board's mechanical dimensions. For further details see Figure 43. Length: Width: Height: 55.00mm 33.90mm 3.15mm Pin 1 Pin 80 Figure 42: AC65/AC75 – top view AC65/AC75_hd_v00.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary All dimensions in mm Figure 43: Dimensions of AC65/AC75 AC65/AC75_hd_v00.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 6.2 s Mounting AC65/AC75 to the Application Platform There are many ways to properly install AC65/AC75 in the host device. An efficient approach is to mount the AC65/AC75 PCB to a frame, plate, rack or chassis. Fasteners can be M2 screws plus suitable washers, circuit board spacers, or customized screws, clamps, or brackets. In addition, the board-to-board connection can also be utilized to achieve better support.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 6.3 s Board-to-Board Application Connector This section provides the specifications of the 80-pin board-to-board connector used to connect AC65/AC75 to the external application. Connector mounted on the AC65/AC75 module: Type: 52991-0808 SlimStack Receptacle 80 pins, 0.50mm pitch, for stacking heights from 3.0 to 4.0mm, see Figure 44 for details. Supplier: Molex www.molex.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Figure 44: Molex board-to-board connector 52991-0808 on AC65/AC75 AC65/AC75_hd_v00.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Figure 45: Mating board-to-board connector 53748-0808 on application AC65/AC75_hd_v00.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 7 s Sample Application Figure 46 shows a typical example of how to integrate a AC65/AC75 module with a Java application. Usage of the various host interfaces depends on the desired features of the application. Audio interface 1 demonstrates the balanced connection of microphone and earpiece. This solution is particularly well suited for internal transducers.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Figure 46: AC65/AC75 sample application for Java AC65/AC75_hd_v00.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary 8 Reference Approval 8.1 Reference Equipment for Type Approval The Siemens reference setup submitted to type approve AC65/AC75 consists of the following components: • Siemens AC65/AC75 cellular engine • Development Support Box DSB75 • SIM card reader integrated on DSB75 • U.FL-R-SMT antenna connector and U.FL-LP antenna cable • Handset type Votronic HH-SI-30.3/V1.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 8.2 s Compliance with FCC Rules and Regulations The FCC Equipment Authorization Certification for the Siemens reference application described in Chapter 8.1 will be registered under the following identifiers: FCC identifier QIPAC65 IC: 267W-AC65 granted to Siemens AG and FCC identifier QIPAC75 IC: 267W-AC75 granted to Siemens AG.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 9 Appendix 9.
AC65/AC75 Hardware Interface Description Confidential / Preliminary s Table 38: Molex sales contacts (subject to change) Molex For further information please click: http://www.molex.com/ Molex Deutschland GmbH Felix-Wankel-Str. 11 4078 Heilbronn-Biberach Germany Phone: +49-7066-9555 0 Fax: +49-7066-9555 29 Email: mxgermany@molex.com American Headquarters Lisle, Illinois 60532 U.S.A. Phone: +1-800-78MOLEX Fax: +1-630-969-1352 Molex China Distributors Beijing, Room 1319, Tower B, COFCO Plaza No.
AC65/AC75 Hardware Interface Description Confidential / Preliminary 9.2 s Fasteners and Fixings for Electronic Equipment This section provides a list of suppliers and manufacturers offering fasteners and fixings for electronic equipment and PCB mounting. The content of this section is designed to offer basic guidance to various mounting solutions with no warranty on the accuracy and sufficiency of the information supplied.
AC65/AC75 Hardware Interface Description Confidential / Preliminary Article number: 07.51.403 Insulating Spacer for M2 Self-gripping *) Length 3.0mm Material Polyamide 6.6 Surface Black Internal diameter 2.2mm External diameter 4.0mm Flammability rating UL94-HB *) 2 spacers are delivered with DSB75 Support Board Article number: 05.11.209 Threaded Stud M2.5 - M2 Type E / External thread at both ends Length 3.0mm Material Stainless steel X12CrMoS17 Thread 1 / Length M2.5 / 6.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Article number: 01.14.131 Screw M2 *) DIN 84 - ISO 1207 Length 8.0mm Material Steel 4.8 Surface Zinced A2K Thread M2 Head diameter D = 3.8mm Head height 1.30mm Type Slotted cheese head screw *) 2 screws are delivered with DSB75 Support Board Article number: 01.14.141 Screw M2 DIN 84 - ISO 1207 Length 10.0mm Material Steel 4.8 Surface Zinced A2K Thread M2 Head diameter D = 3.8mm Head height 1.
s AC65/AC75 Hardware Interface Description Confidential / Preliminary Article number: 02.10.011 Hexagon Nut *) DIN 934 - ISO 4032 Material Steel 4.8 Surface Zinced A2K Thread M2 Wrench size / Ø 4 Thickness / L 1.6mm Type Nut DIN/UNC, DIN934 *) AC65/AC75_hd_v00.
