GR64 GSM/GPRS Modem Integrators Manual
The information contained in this document is the proprietary information of Sony Ericsson Mobile Communications International. The contents are confidential and any disclosure to persons other than the officers, employees, agents or subcontractors of the owner or licensee of this document, without the prior written consent of Sony Ericsson Mobile Communications International, is strictly prohibited.
Revision History Edition Change Information First First Edition Second Updated FCC marking requirements Signal connectivity table updated Modified description of UART1 signal behavior LZT 123 1834 3
Contents Overview....................................................................................................... 9 1 Introduction.......................................................................................... 10 1.1 TARGET USERS......................................................................................................... 10 1.2 PREREQUISITES......................................................................................................... 10 1.3 MANUAL STRUCTURE ..
2.6.2 RADIO FREQUENCY (RF) EXPOSURE AND SAR ..................................................... 22 2.6.4 DISPOSAL OF OLD ELECTRONIC EQUIPMENT ...................................................... 23 2.6.3 2.7 3 PERSONAL MEDICAL DEVICES ............................................................................ 22 PRODUCT MARKING ................................................................................................. 23 Abbreviations .....................................................
5.8.1 TURNING THE MODULE ON ............................................................................... 49 5.8.2 5.9 TURNING THE MODULE OFF .............................................................................. 50 ANALOGUE AUDIO ................................................................................................... 52 5.9.1 AUXILIARY AUDIO TO MOBILE STATION (AUXI)................................................... 53 5.9.2 AUXILIARY AUDIO FROM MOBILE STATION (AUXO) ..........
5.17 ANALOGUE TO DIGITAL CONVERTERS (ADIN1, ADIN2, ADIN3, ADIN4) ................... 69 5.18 I2C SERIAL CONTROL BUS ..................................................................................... 71 5.19 BURST TRANSMISSION (TX_ON) ............................................................................. 72 5.20 REAL TIME CLOCK ................................................................................................ 72 5.20.1 5.20.2 5.20.2.1 5.20.
.1 FEATURES ................................................................................................................ 86 8.2 IMPLEMENTATION .................................................................................................... 86 8.2.1 8.2.2 9 LIMITATIONS..................................................................................................... 86 M2MPOWER IDE (INTEGRATED DEVELOPMENT ENVIRONMENT) ........................... 87 TCP/IP Stack ............................
Overview LZT 123 1834 9
1 Introduction 1.1 Target Users The GR64 wireless modems are designed to be integrated into machine-to-machine or man-to-machine communications applications. They are intended to be used by manufacturers, system integrators, applications developers and developers of wireless communications equipment. 1.
Part 3 – Developer’s Kit This section lists the contents of the Developer’s Kit and provides the information to setup and use the equipment. 1.4 Notation The following symbols and admonition notation are used to draw the readers attention to notable, or crucially-important information.
1.5 Acknowledgements Parts of this document, including text passages, tables, and illustrations, are reproduced from copyright information by kind permission of Agere Systems Inc.
2 GR64 Wireless Modem 2.1 About the GR64 The Sony Ericsson Gx64 family of devices are Quad Band GSM/GPRS wireless modems operating in the GSM 850/900/1800/1900 bands. These products belong to a new generation of Sony Ericsson wireless modems, and are intended to be used in machine-to-machine applications and man-to-machine applications. They are used when there is a need to send and receive data (by SMS, CSD, or GPRS), and make voice calls over the GSM network.
A typical application, involves a micro-controller and a wireless modem, in which the micro-controller sends AT commands to the wireless modem via an RS232 communications link. 2.2 Wireless modems in a Communication System Figure 2.2-1 and Figure 2.2-2 illustrate the main blocks of a wireless communication system using the wireless modem. Figure 2.2-1 shows the communication system when the script is embedded on the wireless modem and Figure 2.
MS GR64 SIM GSM NETWORK SIM STATUS & RESPONSE SYSTEM INTERFACE DC POWER DTE DTE GSM GSM ENGINE ENGINE DCE DCE COMMAND & CONTROL Figure 2.2-2 Main Blocks in a Wireless System (external micro-controller) In accordance with the recommendations of ITU-T (International Telecommunication Union - Telecommunications Standardization Sector) V.24, the TE communicates with the MS over a serial interface.
2.3 Features The wireless modem performs a set of telecom services (TS) according to 3GPP release 99 and ITU-T. The functions of the wireless modem are implemented by issuing AT commands over a serial interface. 2.3.1 Types of Mobile Station The GR64 is a fully Quad Band capable GSM/GPRS mobile station with the characteristics shown in the table below.
2.3.3 Voice Calls The wireless modem offers the capability of MO (mobile originated) and MT (mobile terminated) voice calls, as well as supporting emergency calls. Multi-party, call waiting and call divert features are available. Some of these features are networkoperator specific. For the inter-connection of audio, the wireless modem offers both single ended and balanced analogue input and output lines.
2.3.5 GPRS Multi-Slot Support GSM Multi-slot classes supported by Gx64 devices Multislot Maximum slot allocation Allowable Class Downlink Uplink Active Configuration 8 4 1 5 1 up; 4 down 1 up; 4 down 10 4 2 5 2 up; 3 down Max data rate 8-12Kbps Send 32-48Kbps Receive 8-12Kbps Send 32-48Kbps Receive 16-24Kbps Send 24-36Kbps Receive 2.3.6 SIM Card The GR64 supports an external SIM card through its system connector. A variant of the GR64 also supports an on-card SIM.
2.3.8 Operating Environment Parameter Min Max Units Operating Temperature -30 +75 °C 95 %RH +85 °C Humidity Storage Temperature -40 For complete details of the environmental specification please refer to Para. 10.5. 2.3.9 Other Features The GR64 supports many other features, including: • 3GPP TS 27.
2.4 Service and Support 2.4.1 Web Pages Visit the Sony Ericsson M2M extranet web site for the following information: • Where to buy wireless modems or for recommendations concerning accessories and components • Local contact details for customer support in your region • FAQs (frequently asked questions) Access to the Sony Ericsson extranet site requires a user account and password. Accounts can be arranged through your local account manager. The extranet web site address is: https://extranet.sonyericsson.
Make sure to order the M2M module(s) that are applicable to the needs of your organization. Also, ensure that you have computer or micro-controller. The AT command manual provides the necessary command and control reference to drive the module. 2.5 Precautions The wireless modems are ESD protected up to ±15kV on all 2.8V IO pins. All other pins are protected up to ±2kV.
2.6.2 Radio Frequency (RF) exposure and SAR Your wireless modem device is a low-power radio transmitter and receiver (transceiver). When it is turned on, it emits low levels of radio frequency energy (also known as radio waves or radio frequency fields). Governments around the world have adopted comprehensive international safety guidelines, developed by scientific organizations, e.g.
2.6.4 Disposal of Old Electronic Equipment This symbol on the product or on its packaging indicates that this product shall not be treated as household waste. Instead it shall be handed over to an appropriate collection point for the recycling of electrical and electronic equipment. By ensuring this product is disposed of correctly, you will help prevent potential negative consequences for the environment and human health, which could otherwise be caused by inappropriate waste handling of this product.
3 Abbreviations Abbreviation Explanation AMR Adaptive Multi Rate ATMS Audio to Mobile Station AFMS Audio from Mobile Station CBM Cell Broadcast Message CBS Cell Broadcast Service CSD Circuit Switched Data DCE Data Circuit Terminating Equipment DK Developer’s Kit DTE Data Terminal Equipment DTMF Dual Tone Multi Frequency EA Embedded Application EFR Enhanced Full Rate EMC Electro-Magnetic Compatibility ETSI European Telecommunication Standards Institute FR Full Rate GPRS Gene
Abbreviation Explanation RFU Reserved for Future Use RLP Radio Link Protocol RTC Real Time Clock SDP Service Discovery Protocol SIM Subscriber Identity Module SMS Short Message Service TCP Transport Control Protocol UDP User Datagram Protocol LZT 123 1834 25
Integrating the Wireless Modem LZT 123 1834 26
4 Mechanical Description 4.1 Interface Description The pictures below show the mechanical design of the wireless modem along with the positions of the different connectors and mounting holes. The wireless modem is protected with tin coated steel ASI 1008/1010 covers that meet the environmental and EMC requirements. system connector wireless modem shielded circuits Figure 4.1-1 Wireless modem viewed from below mounting hole & ground connection antenna connector integrated SIM holder Figure 4.
Please note the following: • Mounting holes positioned at the corners make it possible to securely bolt the wireless modem into your application. • Keypad, display, microphone, speaker and battery are not part of the wireless modem. • For the GR64 variant without an integrated SIM holder, the SIM card is mounted in the user application, external to the wireless modem (this is also an option for the integrated SIM holder variant).
4.2 Physical Dimensions Figure 4.
Figure 4.2-2 Dimensions of the Wireless modem (Legacy variant) Measurements are given in millimeters. See also Technical Data, in Section 10.
5 System Connector Interface 5.1 Overview Electrical connections to the wireless modem (except the antenna), are made through the System Connector Interface. The system connector is a 60-pin, standard 0.05 in (1.27 mm) pitch device. The system connector allows both board-to-board and board-to-cable connections to be made. Use a board-board connector to connect the wireless modem directly to a PCB, and a board-cable connector to connect the radio device via a cable.
Table 5.
Pin Name Direction Function LED Output LED control signal GPIO6 In/Out General purpose IO 34 VREF In (Out) Core voltage reference 35 TX_ON Output Transmit indication RI Output Ring Indicator GPIO8 In/Out General purpose IO DTR1 Input 33 36 37 38 39 40 Data Terminal Ready (UART1) GPIO10 In/Out General purpose IO DCD1 Output Data Carrier Detect (UART1) GPIO11 In/Out General purpose IO RTS1 Input Ready To Send (UART1) GPIO9 In/Out General purpose IO CTS1 Output Cle
1 - These signals are required if the external SIM interface is used 2 - These pin connections are required for sleep mode operation 3, 4 NOTE - At least one of these interfaces is required to be connected 5.2 Dealing with Unused pins Integrators applications may connect all of the GR64 signals pins, or just those necessary for minimal operation, or most commonly some other permutation. If GR64 signal pins are not connected to the host application you should terminate them in the following manner.
LZT 123 1834 Pin Name Unused pin termination 31 BUZZER Leave Open 32 DSR1/GPIO7 Connect to VREF 33 LED/GPIO6 Connect to VREF 34 VREF Must be connected 35 TX_ON Leave Open 36 RI/GPIO8 Connect to VREF 37 DTR1/GPIO10 Connect to VREF 38 DCD1/GPIO11 Connect to VREF 39 RTS1/GPIO9 Connect to VREF 40 CTS1/GPIO12 Connect to VREF 41 DTM1 Connect to VREF 42 DFM1 Leave Open 43 DTM3 Connect to VREF 44 DFM3 Leave Open 45 USBDP Leave Open 46 USBDN Leave Open 47 SSPDTM
5.3 General Electrical and Logical Characteristics The core digital IO is based upon 1.8V technology in the baseband chipset. All external IO signals undergo bi-directional level shifting on the physical module to provide flexibility to users of different voltage technology. An internal core IO regulator is used as a reference for the module-side logic, whilst the application (host-side) reference is fed by VREF in one of two implementations.
Figure 5.3-1 Common Level Shifter Circuit (VREF as an Output) The output impedance of the Maxim chip is 6kohm, so you must ensure that your application impedance to ground or supply is high enough to allow for full voltage swing. A minimum application impedance of 56kohm should be assumed. Similarly, where a GPIO is used as an input, your application driver output impedance must not exceed 680 ohm.
5.3.1.2 I2C Level Shifter Interface Because of the nature of the I2C interface signals, SDA (data) & SCL (clock), they utilize a different type of level-shifting technology to that of the ‘common’ IO. The I2C level shifter IC uses an open drain construction with no direction pin, ideally suited to bi- directional low voltage (such as the GR64 1.8 V processor) I2C port translation to the normal 3.3 V or 5.0 V I2C-bus signal levels.
5.4 Grounds Pin Name Direction Function 2 GND - Ground 4 GND - Ground 6 GND - Ground 8 GND - Ground 10 GND - Ground 12 GND - Ground 60 AREF - Analogue reference There are two ground connections in the wireless modem, AREF (analogue ground) and GND (digital ground). Pin assignments are shown in the table above. AREF and GND are connected at a single point inside the wireless modem, however they must not be joined together in the user application. NOTE 5.4.
5.5 Regulated Power Supply Input (VCC) Pin Name Direction Function 1 VCC Input DC power 3 VCC Input DC power 5 VCC Input DC power 7 VCC Input DC power 9 VCC Input DC power Power is supplied to the wireless modem VCC pins, from an external source. User application circuitry should connect all VCC pins together in to carry the current drawn by the wireless modem. The electrical characteristics for VCC are shown in the following table.
The wireless modem has insufficient internal capacitance to supply the large current peaks during GSM burst transmission - use the following TIP general guidelines in designing the application power supply. Fit a low ESR electrolytic capacitor close to the wireless modem (>1,000 µF, with an ESR < 100 mΩ) Ensure power supply to wireless modem line resistance is < 200 mΩ The module has approximately 40µF of internal capacitance across the VCC pins.
VREF output Parameter Min Nom Max Unit VREF output voltage 2.74 2.8 2.86 V 75 mA VREF load current 5.6.2 VREF as an Input The version of GR64 with an integrated SIM holder provides a reference input to the host side level shifter devices. This enables users of varying technologies to connect directly to the GR64’s IO by providing a reference from their own application IO. VREF Input Parameter Min VREF input voltage 1.8 VREF load current Typ 0.1 Max Unit 5.2 V 50 µA Figure 5.
5.7 Battery Charging Input (CHG_IN) Pin Name 11 CHG_IN Direction Input Function Battery charger power For battery powered applications, the GR64 provides a charge input (CHG_IN) pin to aid and support battery charging. A typical application would power the wireless modem directly from a battery source connected to VCC (pins 1, 3, 5, 7, 9) then provide a dc power source to the CHG_IN connection (pin 11). The GR64 can control an internal switching FET which creates a charging pathway to the battery.
During microprocessor supervised mode, the GR64 takes a current-limited voltage source at the CHG_IN pin to implement constant-current charging of a single Li-Ion cell connected to the VCC pins. CHG_IN 3.6V 3.6V 50mA 50mA CHARGE FET C1 D1 + VCC MAX CURRENT DETECTION - V REF1 SINGLE CELL Li-ION + VOLTAGE SOURCE BATTERY BATTERY CHARGER CHARGER CONTROL CONTROL TIMER TIMER TO uPC SUI SUI - V REF2 ADC ADIN1 Figure 5.7-1 Typical application for pulse charging a battery 5.7.
The delta between CHG_IN and VCC is continuously monitored; however, the valid to invalid detection has a delay of 46 ms. When CHG_IN exceeds VCC by 150 mV, it is considered to be at a valid relative level. It is considered to have an invalid relative level if it subsequently falls below VCC by 50 mV. If the relative voltage of CHG_IN goes invalid and remains invalid for the duration of the detection delay, charging is terminated. As a safety precaution, the battery cell voltage must be at least 2.
The weight of lithium ion batteries is approximately one half compared with a nickel cadmium or nickel metal hydride battery of similar capacity. The volume of lithium ion batteries is 40 to 50% smaller than that of nickel cadmium, and 20 to 30% smaller than that of a nickel metal hydride. The lithium ion battery is free from the so-called memory effect, a phenomenon associated with nickel cadmium in which the apparent battery capacity decreases when shallow charge and discharge cycles are repeated.
size is generally a factor of capacity, since larger capacity batteries naturally have more material/cells, and will range between 2750mm3 to 18000mm3 for small form- factor Li-Ion batteries the speed by which lithium-ion ages is governed by temperature and state-ofcharge; high temperatures and deep discharge will effect useful life if possible avoid frequent full discharges because this puts additional strain on the battery, partial discharges with frequent recharges are better never short circuit the te
Example 3 – Typical Operation: A module performing periodic network data transfers and communicating intervallic status information to its host would spend its non-active periods in sleep mode. If the module spends 30 mins each day on call (320mA), 30 second each hour performing housekeeping, monitoring and status tasks (110mA), and sleeps (2.1mA) during the intervening periods, an 1800mAh rated Li-Ion battery fully charged would typically provide 1800*0.95/([0.5hr*320]+[0.2hr*110]+[23.3hr*2.
5.8 Powering the Module ON and OFF (ON/OFF) Pin Name 14 ON/OFF Direction Input Function Device on/off control 5.8.1 Turning the Module On Figure 5.8-1 Power On timing The GR64 power ON sequence is shown above. ON/OFF and VREF, shown by solid lines. The significant signals are VCC, The other signals (in dashed lines) are internal to the module and are shown for reference purposes only. Initially, power is supplied to the VCC pins.
When the VREF is configured as an input, it cannot be used as a power indicator. NOTE VREF exceeds it’s reset threshold approx 500µs later, then 250ms afterwards (denoted by t2) the RESET line goes high. The microprocessor can latch the power on state by setting the power keep (PWR_KEEP) high after the RESET goes high and before the power on (ON/OFF) signal is released. It is recommended that ON/OFF is held low for at least 450ms to guarantee completion of the power up sequence. 5.8.
With the module powered normally, ON/OFF is pulled-up to VCC potential. In order to power down the module, ON/OFF is pulled to ground. Once ON/OFF has been held low for at least 125ms the shut-down procedure begins. Although ON/OFF can be held low for longer, it will delay completion of the shut-down event. If the module is registered on a GSM network, the de-registration process will complete; this may last between 3 to 30 seconds.
High-level Low-level 5.9 Analogue Audio Pin Name Direction Function 53 MICIP Input Microphone input positive 54 MICIN Input Microphone input negative 55 EARP Output Earpiece output positive 56 EARN Output Earpiece output negative 57 AUXO Output Auxiliary audio from module to host 59 AUXI Input Auxiliary audio to module from host 60 AREF - Analogue reference The analogue audio signals comprise of two audio inputs to the module, and two audio output from the module.
There five factory-set audio profiles as follows: • Portable hands free Low-level is recommended. • Handset Low-level is recommended. • Car kit Low-level is recommended. • Speakerphone High-level is recommended. • Headset Low-level or High-level can be used with headset, depending on requirements. Portable hands free is the factory-set default profile.
5.9.2 Auxiliary Audio from Mobile Station (AUXO) AUXO is a single-ended auxiliary analogue audio output from the wireless modem and may be used to drive a speaker or an earpiece. The interface has an internal 100nF coupling capacitor; a load of 10kohm will provide a near full-scale output capability between 300 to 4300 Hz. The table below shows the audio signal levels for AUXO.
The input gain is scaled by the input resistors to be around 18, which provides optimal performance for many standard types of electret microphones. The module provides a microphone bias at 2.4V, and can supply at least 1mA of current. Parameter Input voltage full scale Frequency response Conditions Min Typ Max Unit max input gain 14 16 18 mVrms min input gain 45 50 56 mVrms 3400 Hz 2.64 V -3dB cut-off Output dc bias level 300 2.16 2.4 5.9.
5.10.1 PCM Data Format The PCM digital audio interface for GR64 is based upon the Texas Instruments SSI standard. The SSP is a versatile interface which can be programmed for different clock rates and data frame sizes between 4 to 16 bits. PCMCLK (bit clock) and PCMSYNC (frame synchronization) are both generated by the DSP within the wireless modem. The DSP within the wireless modem in this instance is the master for all external PCM, so clocks and data from external devices must be synchronized to it.
SSPCLK SSPFS SSPDTM LSB MSB LSB MSB SSPDFM LSB MSB LSB MSB Frame n-1 Frame n Frame n+1 Figure 5.10-3 PCM Frame format for a continuous transfer The PCM interface has a Slave mode, however the allocated DSP buffer size limits the maximum data rate available. A separate Application Note describing slave mode implementation can be obtained from Sony Ericsson through Customer Support. 5.11 Serial Data Interfaces The serial channels consist of two UARTs and a USB port.
5.11.1 UART1 Pin Name Direction Function 32 DSR1 Output Data Set Ready (UART1) 36 RI Output Ring Indicator 37 DTR1 Input 38 DCD1 Output 39 RTS1 Input Ready To Send (UART1) 40 CTS1 Output Clear To Send (UART1) 41 DTM1 Input Data To Module from host (UART1) 42 DFM1 Output Data From Module to host (UART1) Data Terminal Ready (UART1) Data Carrier Detect (UART1) UART1 is a full featured Universal Asynchronous Receiver Transmitter providing fullduplex asynchronous communication.
5.11.2.1 Serial Data From Wireless modem (DFM1) DFM1 is an output signal that the wireless modem uses to send data via UART1 to the host application. The electrical characteristics of this level-shifted signal are described in section 5.3.1. 5.11.2.2 Serial Data To Wireless modem (DTM1) DTM1 is an input signal, used by the application to send data via UART1 to the wireless modem. The electrical characteristics of this level-shifted signal are described in section 5.3.1. 5.11.
5.11.3.2 Request to Send (RTS1) RTS is used to condition the DCE for data transmission. The default level is high by internal pull up. The application must pull RTS low to enable data transmission from the wireless modem. Similarly, the wireless modem asserts CTS low, indicating it is ready to receive data transmission from the host. 5.11.3.3 Clear To Send (CTS1) CTS is asserted by the DCE to indicate that the host (DTE) may transmit data.
5.11.4 UART3 (DTM3, DFM3) Pin Name Direction Function 43 DTM3 Input Data To Module from host (UART3) 44 DFM3 Output Data From Module to host (UART3) UART 3 consists of a full duplex serial communication port with transmission and reception lines. Timing and electrical signals characteristics are the same as for UART1, DTM1 and DFM1, including the baud rate range and the capability to auto-baud. 5.11.4.
5.11.5 USB Pin Name Direction 45 USBDP In/Out USB data positive 46 USBDN In/Out USB data negative 49 VUSB Input Function USB DC power The USB interface is compliant with the USB2.0 standard for a full speed (12Mbps) endpoint device. Together with VUSB and GND it creates a standard USB 4-pin interface. VUSB (VBUS in the USB standard) is nominally 5.0V. USB is not available on legacy variant GR64 devices (DPY 102 1494/10 & DPY 102 1494/30 products).
To implement successful applications using the GR64 USB interface, users should familiarize themselves with the USB specification. 5.11.6 SIM Card Interface Pin Name Direction Function 15 SIMVCC Output 16 SIMDET Input 17 SIMRST Output SIM card reset signal 18 SIMDAT In/Out SIM card data 19 SIMCLK Output SIM card clock signal 1.8V or 3.0V SIM card supply SIM presence detection This interface allows the user to communicate with the smart (SIM) card in the user application.
Signal Parameter Mode SIMRST Min Typ Max 3.0V 0.9xSIMVCC Low level output voltage (VOL) Unit V 1.8V 0.4 V 3.0V 0.4 V 5.11.7 SIM Detection (SIMDET) SIMDET is used to determine whether a SIM card has been inserted into or removed from the SIM card holder. You should normally wire it to the ‘card inserted switch’ of the SIM card holder, but different implementations are possible.
Figure 5.12-1 SERVICE Pin Interface Signal Mode Value Active High SERVICE Inactive Low Minimum input voltage 2.5 V Maximum input voltage 12.0 V Maximum input voltage 0.8 V There are two methods for updating the firmware in the GR64: Sony Ericsson Emma III and Updater. The Emma III system is a web based tool that accesses a Sony Ericsson server from which signed NOTE software can be downloaded. The Updater is a local application that downloads a signed image provided by SEMC. 5.
5.14 LED Pin Name 33 LED Direction Output Function LED control signal The LED interface is intended to operate a status LED, which can be programmed on and off, or for a particular blink sequence. The LED signal is derived from a standard GPIO and does not have sufficient drive capability to operate an LED directly, so it requires the user to implement some form of transistor circuit. implementation is shown below. A recommended Figure 5.
5.15 General Purpose IO Pin Name Default Alternate function 21 GPIO1 GPIO1 22 GPIO2 GPIO2 23 GPIO3 GPIO3 24 GPIO4 GPIO4 13 GPIO5 ADIN4 ADC Input 4 33 GPIO6 LED LED control signal 32 GPIO7 DSR1 Data Set Ready (UART1) 36 GPIO8 RI Ring Indicator 39 GPIO9 RTS1 Ready To Send (UART1) 37 GPIO10 DTR1 Data Terminal Ready (UART1) 38 GPIO11 DCD1 Data Carrier Detect (UART1) 40 GPIO12 CTS1 Clear To Send (UART1) All general purpose IO (GPIO) is programmable by the user.
Some GPIO is configured to provide a keyboard interface (details are covered in the next section). In the GR64, all IO undergoes level shifting to maintain backward compatibility with older interface technology. Users should not that GPIO that is used truly bi- directional cannot be open drain type on both sides. At least one side needs to be able to drive the signal both high and low. 5.15.
5.16 Digital to Analogue Converter – DAC Pin Name Direction 20 DAC Output Function Pulse width modulated signal The GPIOx has dual functionality. In addition of being a fully programmable GPIO it also has the capability of becoming a PWM output. This PWM can be used as a DAC by implementing an RC-filter followed by an optional buffer. Figure 5.16-1 Typical arrangement for adapting PWM for a DAC function 5.
The module has a single precision 10-bit ADC, shared by a number of functions within the module and also through the external interface connections (three dedicated, one shared). The ADC sharing arrangement is shown below. Figure 5.17-1 ADC sharing arrangement ADC sampling frequency and sampling source selection can be set up and controlled with AT-commands by the user. ADC samples requires up to 5 clock (ADCLK) cycles to process. The ADC also performs some system-level sampling.
5.18 I2C Serial Control Bus Pin Name Direction Function 29 SDA In/Out I2C data 30 SCL Output I2C clock The I2C interface comprises two signals; data (SDA) and clock (SCL). Both SDA and SCL have pull-up resistors. Therefore, when the bus is free, both SDA and SCL are in a HIGH state. The GR64 implementation of I2C supports only a single master mode, with the module being the master. The output stages of SDA and SCL must have an open- drain or open-collector to perform a wired-AND function.
5.19 Burst Transmission (TX_ON) Pin Name Direction 35 TX_ON Output Function Transmit indication Burst transmission is the period during which the GSM transceiver is transmitting RF signals. TX_ON is an indicator that the module is transmitting. A typical application may use TX_ON to blank adjacent receiver circuitry as a means of protecting sensitive input stages. TX_ON is active HIGH. 5.20 Real Time Clock The real-time clock (RTC) is driven by a 32.
5.20.1 Real Time Clock Backup Supply (VRTC) Pin Name Direction 25 VRTC Input Function DC supply for real time clock VRTC provides an input connection to the module which allows the user to power the real time clock (RTC) within the GR64 by way of a coin cell or charged capacitor. When the module is powered, an internal LDO regulator provides a 200µA source designed to supply the microprocessor’s RTC block.
Figure 5.20-1 VRTC connection 5.20.2 RTC Alarm (ALARM) Pin Name 50 ALARM Direction Output Function RTC Alarm The Alarm output is logic output from the module which is supplied from the RTC circuitry block. This block is in turn supplied either from the main supply of the module or from a backup battery if the main supply is not available. 5.20.2.1 ALARM Output from the Module The ALARM time is set by the use of an AT-command.
Figure 5.20-2 Typical host-side circuit for ALARM output VRTC is specified to work down to 1.1V across the environmental operating conditions of the GR64. Integrators may discover in controlled environments that the VRTC interface will function reliably as low as 0.8V, so best practice would be to design the circuitry to operate down to 0.7V. 5.20.
6 Antenna Connector The wireless modem’s antenna connector allows transmission of the radio frequency (RF) signals from the wireless modem to an external customer supplied antenna. The connector is a micro-miniature coaxial MMCX through hole mounted socket. A number of suitable MMCX type, mating plugs are available from the following manufacturers: • Amphenol • Suhner • IMS Connector Systems The nominal impedance of the antenna interface is 50 ohms.
5.
7 Hints for Integrating the Wireless Modem This chapter gives you advice and helpful hints on how to integrate the wireless modem into your application from a hardware perspective. Make sure you read and consider the information under the following headings before starting your integration work: • Safety advice and precautions • Installation of the wireless modem • Antenna 7.1 Safety Advice and Precautions 7.1.1 General Always ensure that use of the wireless modem is permitted.
Do not connect any incompatible component or product to the module. ! Sony Ericsson does not warrant against defects, malfunction, non- conformities or deviation caused by the connection of incompatible components or products to the GR64. WARNING The connection/disconnection method for the development board is by means of the DC power jack. For this reason, the mains supply should be situated close to the development board and be easily accessible. 7.
Like any mobile station, the antenna of the wireless modem emits radio frequency energy. To avoid EMI (electromagnetic interference), users must determine whether the application itself, or equipment in the application’s proximity, requires further protection against radio emission and the disturbances it might cause. Protection is secured either by shielding the surrounding electronics or by moving the antenna away from the electronics and the external signals cable.
7.4.1.2 Signal Strength The wireless modem has to be placed in a way that ensures sufficient signal strength. To improve signal strength, the antenna can be moved to another position. Signal strength may depend on how close the wireless modem is to a radio base station. You must ensure that the location at which you intend to use the wireless modem, is within the network coverage area.
7.4.2 How to Install the Wireless modem 7.4.2.1 Power Supply Use a high-quality power supply cable with low resistance. This ensures that the voltages at the connector pins are within the allowed range, even during the maximum peak current. An electrolytic capacitor should be placed close to the power supply pins of the wireless modem to supply the peak currents during burst transmission. See 5.5 Regulated Power Supply Input (VCC), page 40. 7.4.2.
7.5 Antenna 7.5.1 General The antenna is the component in the users system that maintains the radio link between the network and the wireless modem.
7.5.3 Antenna Placement The antenna should be placed away from electronic devices or other antennas. The recommended minimum distance between adjacent antennas, operating in a similar radio frequency band, is at least 50 cm. If signal strength is weak, it is useful to face a directional antenna at the closest radio base station. This can increase the strength of the signal received by the wireless modem. The wireless modem’s peak output power can reach 2 W.
• Multi-path fading is a sudden decrease or increase in the signal strength. This is the result of interference caused when direct and reflected signals reach the antenna simultaneously. reflect signals. LZT 123 1834 Surfaces such as buildings, streets, vehicles, etc.
8 Embedded Applications The wireless modem has the capability to store and run customer written code in the form of a script during the processor’s idle time, through the use of an on board interpreter. 8.1 Features Main features of embedded applications are as follows: • C-based scripting language (Sony Ericsson specific) • Over the air upgrade of scripts (NOT GSM software) • Library of intrinsic functions • 2 scripts can be stored in the memory at any time (but only 1 can be active) 8.
Processing power is something that needs to be considered as the script is run as a low priority process within the software. However, controller mode stops GSM operation and provides all the processing power for the script to be run. See the M2mpower Application Guide for more details. Code cannot be ported directly from an existing application and loaded directly onto the wireless modem.
9 TCP/IP Stack An on board IP/TCP/UDP stack has been integrated into the software negating the need for the customer to implement one in their own code base. This is accessible by using an embedded application (see section 9) using intrinsic functions. 9.1 Implementation The following types of commands allow various functions: • Open/closing IP connections - Negotiates/closes an IP address with the web server. • Send/Receive TCP packets - Performs all TCP operations to send and receive packets.
10 Technical Data 10.1 Mechanical Specifications Refer to Figure 4.2-1 & Figure 4.2-2 for reference to mechanical features. Mechanical Feature Variant Value Length 50 mm Width 33 mm Thickness (see illustration below) without SIM holder 3.3 mm with SIM holder 5.9 mm Weight 3.3 Figure 10.1-1 Thickness of module variant without SIM holder 5.9 Figure 10.
10.2 Power supply voltage, normal operation Parameter Mode Limit VCC Supply voltage Nominal 3.6 V Min 3.2 V Max 4.5 V Absolute maximum -0.3V to 6.5V voltage range Maximum supply ripple Maximum allowable voltage drop Transmission burst Maximum current consumed Full power (2W) transmit <100mV @<200kHz <20mV @>200kHz 200mV 2250 mA (peak) 2100 mA (avg) ! WARNING Stresses in excess of the absolute maximum limits can cause permanent damage to the device. These are absolute stress ratings only.
10.
Test Case Test Summary Ref Standard Freq: 10-60 Hz, constant displacement ≡±0.35mm Freq : 60-500 Hz, constant Sinusoidal Vibration acceleration ≡ 5 g Sweep velocity: 1 oct/min IEC 60068-2-6 Sweeps: 5 per axis Axis: 3 axis (x, y, z) per device Power Spectral Density: 5 Hz 0.10 m2/s3 12 Hz Random Vibration 2.20 m2/s3 20 Hz 2.20 m2/s3 200 Hz 0.04 m2/s3 IEC 60068-2-34 500 Hz 0.
11 Regulatory Notices The GR64 described in this manual conforms to the Radio and Telecommunications Terminal Equipment (R&TTE) directive 99/5/EC with requirements covering EMC directive 89/336/EEC and Low Voltage directive 73/23/EEC. The product fulfils the requirements according to 3GPP TS 51.010-1, EN 301 489-7 and EN60950. This device complies with Part 15 of the FCC rules.
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12 Introduction to the Universal Developer’s Kit The Sony Ericsson M2M universal developer’s kit (UDK) is designed to get you started quickly. It contains all the hardware you will need to begin the development of an application. The only items you need to provide are; a wireless modem, a computer, a SIM card with a network subscription, and a knowledge of programming with AT commands.
