u-blox SARA-G3 Series System Integration Manual
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u-blox SARA-G3 Series System Integration Manual

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SARA-G3 series
GSM/GPRS modules
System Integration Manual
Abstract
This document describes the features and the system integration
of SARA-G3 series GSM/GPRS wireless modules.
These modules are complete and cost efficient solutions offering
up to quad-band GSM/GPRS voice and/or data transmission
technology in a compact form factor.
UBX-13000995 - R06
www.u-blox.com
26.0 x 16.0 x 3.0 mm

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  • Page 1 System Integration Manual Abstract This document describes the features and the system integration of SARA-G3 series GSM/GPRS wireless modules. These modules are complete and cost efficient solutions offering up to quad-band GSM/GPRS voice and/or data transmission technology in a compact form factor.
  • Page 2 SARA-G3 series - System Integration Manual Document Information Title SARA-G3 series Subtitle GSM/GPRS modules Document type System Integration Manual Document number UBX-13000995 Revision, date 29-Nov-2013 Document status Objective Specification Document status information Objective This document contains target values. Revised and supplementary data will be Specification published later.
  • Page 3 This document and the use of any information contained therein, is subject to the acceptance of the u-blox terms and conditions. They can be downloaded from www.u-blox.com. u-blox makes no warranties based on the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice.

  • Page 4: Preface

    Preface u-blox Technical Documentation As part of our commitment to customer support, u-blox maintains an extensive volume of technical documentation for our products. In addition to our product-specific technical data sheets, the following manuals are available to assist u-blox customers in product design and development.
  • Page 5 SARA-G3 series - System Integration Manual Helpful Information when Contacting Technical Support When contacting Technical Support, have the following information ready:  Module type (e.g. SARA-G350) and firmware version  Module configuration  Clear description of your question or the problem ...

  • Page 6: Table Of Contents

    SARA-G3 series - System Integration Manual Contents Preface ............................4 Contents ..........................System description ......................Overview ........................Architecture ......................1311 1.2.1 Internal blocks..................... 1512 Pin-out ........................1713 Operating modes ...................... 2317 Supply interfaces ...................... 2619 1.5.1 Module supply input (VCC) ................
  • Page 7 SARA-G3 series - System Integration Manual 1.13 System features ....................7554 1.13.1 Network indication ....................7554 1.13.2 Antenna detection ....................7554 1.13.3 Jamming detection ....................7554 1.13.4 TCP/IP and UDP/IP ..................7755 1.13.5 FTP ......................... 7755 1.13.6 HTTP ....................... 7755 1.13.7...
  • Page 8 154113 2.12 ESD guidelines ....................156115 2.12.1 ESD immunity test overview ................156115 2.12.2 ESD immunity test of u-blox SARA-G3 series reference designs ......156115 2.12.3 ESD application circuits ..................157116 2.13 SARA-G350 ATEX integration in explosive atmospheres applications......160118 2.13.1...
  • Page 9 SARA-G3 series - System Integration Manual Anatel certification ....................182132 SARA-G350 ATEX conformance for use in explosive atmospheres........183134 Product Testing ......................184135 u-blox in-series production test ................184135 Test parameters for OEM manufacturer ............... 184135 5.2.1 “Go/No go” tests for integrated devices ..............

  • Page 10: System Description

    SARA-G3 series - System Integration Manual 1 System description 1.1 Overview SARA-G3 series are versatile 2.5G GSM/GPRS wireless modules in a miniature LGA (Land Grid Array) form factor. SARA-G350 is a full feature quad-band GSM/GPRS wireless module with a comprehensive feature set including an extensive set of internet protocols.
  • Page 11 A = available upon request E = 32 kHz signal at EXT32K input pin is required for low power idle-mode Table 1: SARA-G3 series features summary Table 2Table 2 reports a summary of GSM/GPRS characteristics of SARA-G3 series modules. Item SARA-G300 SARA-G310...
  • Page 12 Transparent mode Non transparent mode Non transparent mode Non transparent mode Network Operation Modes I to III I to III I to III Table 2: SARA-G3 series GSM/GPRS characteristics summary UBX-13000995 - R06 Objective Specification System description Page 12 of 218...

  • Page 13: Architecture

    SARA-G3 series - System Integration Manual 1.2 Architecture 26 MHz 32 kHz 32 kHz Power-On Reset Sw itch Transceiver Filter SIM Card UART M emory Auxiliary UART Baseband VCC (Supply) V_BCKP (RTC) Pow er M anagement V_INT (I/O) Figure 1: SARA-G300 and SARA-G310 modules block diagram 32.768 kHz...
  • Page 14 SARA-G3 series - System Integration Manual UBX-13000995 - R06 Objective Specification System description Page 14 of 218...

  • Page 15: Internal Blocks

    SARA-G3 series - System Integration Manual 1.2.1 Internal blocks SARA-G3 modules consist of the following internal sections: RF, Baseband and Power Management. RF section The RF section is composed of the following main elements:  RF transceiver performing modulation, up-conversion of the baseband I/Q signals, down-conversion and demodulation of the RF received signals.
  • Page 16 SARA-G3 series - System Integration Manual G310 modules provides a 32 kHz reference signal suitable only to feed the EXT32K input pin, furnishes the reference clock for the RTC, and allows low power idle-mode and RTC functions support with modules switched on.

  • Page 17: Pin-Out

    SARA-G3 series - System Integration Manual 1.3 Pin-out Table 3Table 3 lists the pin-out of the SARA-G3 modules, with pins grouped by function. Function Pin Name Module Pin No Description Remarks Power 51, 52, Module supply VCC pins are internally connected each other.
  • Page 18 SARA-G3 series - System Integration Manual Function Pin Name Module Pin No Description Remarks 32K_OUT SARA-G300 32 kHz output 32 kHz output suitable only to feed the EXT32K input giving the RTC reference clock, allowing SARA-G310 low power idle-mode and RTC functions support.
  • Page 19 SARA-G3 series - System Integration Manual Function Pin Name Module Pin No Description Remarks UART UART data 1.8 V output, Circuit 104 (RXD) in ITU-T output V.24, for AT command, data communication, FOAT. See section 1.9.11.9.1 for functional description. See section 2.5.12.5.1...
  • Page 20 SARA-G3 series - System Integration Manual Function Pin Name Module Pin No Description Remarks Auxiliary RXD_AUX Auxiliary UART 1.8 V output, Circuit 104 (RXD) in ITU-T UART data output V.24, for FW upgrade and trace log capture. Access by external test-point is recommended.
  • Page 21 SARA-G3 series - System Integration Manual Function Pin Name Module Pin No Description Remarks Analog MIC_BIAS SARA-G350 Microphone Supply output (2.2 V typ) for external Audio supply output microphone. See section 1.10.11.10.1 for functional description. See section 2.6.12.6.1 for external circuit design-...
  • Page 22 Pad disabled. Leave unconnected. 25-27, SARA-G310 See section 2.82.8 34-37 RSVD SARA-G300 44-49, RESERVED pin Leave unconnected. SARA-G310 See section 2.82.8 Table 3: SARA-G3 series modules pin definition, grouped by function UBX-13000995 - R06 Objective Specification System description Page 22 of 218...
  • Page 23 SARA-G3 series - System Integration Manual UBX-13000995 - R06 Objective Specification System description Page 23 of 218...

  • Page 24: Operating Modes

    SARA-G3 series - System Integration Manual 1.4 Operating modes SARA-G3 modules have several operating modes. The operating modes defined in Table 4Table 4 described in detail in Table 5Table 5 provide general guidelines for operation. General Status Operating Mode Definition...
  • Page 25 SARA-G300 and SARA-G310 modules to let AT&K3 and the power saving AT command is idle-mode that otherwise cannot be reached (this is set to 2 (refer to 1.9.1.4) not needed for the other SARA-G3 series GNSS data ready: when the GPIO3 pin is  modules).
  • Page 26 SARA-G3 series - System Integration Manual pow ered Remove VCC Switch ON: Pow er off • Apply VCC Switch ON: Switch OFF: • PWR_ON • AT+CPWROFF • RTC Alarm Incoming/outgoing call or If power saving is enabled other dedicated device...

  • Page 27: Supply Interfaces

    V_BCKP Real Time Clock supply, V_INT digital interfaces supply and VSIM SIM card supply. During operation, the current drawn by the SARA-G3 series modules through the VCC pins can vary by several orders of magnitude. This ranges from the high peak of current consumption during GSM transmitting bursts at maximum power level in connected-mode (as described in section 1.5.1.2), to the...
  • Page 28 SARA-G3 series - System Integration Manual Item Requirement Remark VCC peak current Withstand the maximum peak current consumption The specified maximum peak of current consumption SARA-G3 series Data specified occurs during GSM single transmit slot in 850/900 Sheet [1][1]. MHz connected-mode, in case of mismatched antenna.
  • Page 29 SARA-G3 series - System Integration Manual Current [A] 1900 mA Peak current depends on TX power 200 mA 60-120 mA 60-120 mA 10-40 mA unused unused unused unused unused unused unused unused unused unused Time [ms] slot slot slot slot...
  • Page 30 SARA-G3 series - System Integration Manual = 8 slots/bursts), so with a 1/4 duty cycle, according to GSM TDMA. If the module is in GPRS connected-mode in 1800 or 1900 MHz bands, consumption figures are lower than in the 850 or 900 MHz band, due to 3GPP Tx power specifications.
  • Page 31 32 kHz clock. For SARA-G300 and SARA- G310 modules, a valid 32 kHz signal must be properly provided to the EXT32K input pin of the module to let idle-mode, that otherwise cannot be reached (this is not needed for the other SARA-G3 series modules).
  • Page 32 SARA-G3 series - System Integration Manual Current [mA] 60-120 mA 300-600 µA Time [s] IDLE MODE ACTIVE MODE Current [mA] 0.44-2.09 s 20-30 ms 60-120 mA 20-40 mA 4-5 mA 300-600 µA Time [ms] Active Mode Idle Mode Enabled Enabled...
  • Page 33 SARA-G3 series - System Integration Manual Current [mA] 60-120 mA 3-4 mA Time [s] IDLE MODE ACTIVE MODE Current [mA] 0.44-2.09 s 20-30 ms 60-120 mA 20-40 mA 4-5 mA 3-4 mA Time [ms] Active Mode Idle Mode Enabled Enabled...
  • Page 34 SARA-G3 series - System Integration Manual 1.5.1.4 VCC current consumption in fixed active-mode (power saving disabled) Power saving configuration is by default disabled, or it can be disabled using the appropriate AT command u-blox AT Commands Manual (refer to [2], AT+UPSV command). When power saving is disabled, the module does not automatically enter idle-mode whenever possible: the module remains in active-mode.
  • Page 35 SARA-G3 series - System Integration Manual Figure 10Figure 10 roughly describes the current consumption profile of SARA-G350 modules or the current consumption profile of SARA-G300 / SARA-G310 modules when their EXT32K input is not fed by a signal (left unconnected), when power saving is disabled: the module is registered with the network, active-mode is maintained, and the receiver and the DSP are periodically activated to monitor the paging channel for paging block reception.
  • Page 36 32 kHz EXT32K Figure 11: SARA-G3 series RTC supply input/output (V_BCKP) and 32 kHz RTC timing reference clock simplified block diagram The RTC provides the module time reference (date and time) that is used to set the wake-up interval during the idle-mode periods between network paging, and is able to make available the programmable alarm functions.

  • Page 37: Interfaces Supply Output (V_Int)

    Interfaces V_INT Figure 12: SARA-G3 series interfaces supply output (V_INT) simplified block diagram The internal regulator that generates the V_INT supply is a switching step-down converter that is directly supplied from VCC. The voltage regulator output is set to 1.8 V (typical) when the module is switched on and it is disabled when the module is switched off.

  • Page 38: System Function Interfaces

    SARA-G3 series - System Integration Manual 1.6 System function interfaces 1.6.1 Module power-on The power-on sequence of SARA-G3 series modules is initiated in one of these ways:  Rising edge on the VCC pin to a valid voltage as module supply (i.e. applying module supply) ...
  • Page 39 Figure 13: SARA-G3 series power-on sequence description The Internal Reset signal is not available on a module pin, but the application can monitor the V_INT pin to sense the start of the SARA-G3 series power-on sequence. UBX-13000995 - R06 Objective Specification...

  • Page 40: Module Power-Off

    Figure 14: SARA-G3 series power-off sequence description The Internal Reset signal is not available on a module pin, but the application can monitor the V_INT pin to sense the end of the SARA-G3 series power-off sequence. UBX-13000995 - R06 Objective Specification...

  • Page 41: External 32 Khz Signal Input (Ext32K)

    Processor RESET_N Reset Input Figure 15: SARA-G3 series reset input (RESET_N) description 1.6.4 External 32 kHz signal input (EXT32K) The EXT32K pin of SARA-G300 / SARA-G310 modules is an input pin that must be fed by a proper 32 kHz signal to make available the reference clock for the Real Time Clock (RTC) timing, used by the module processor when in the low power idle-mode.

  • Page 42: Internal 32 Khz Signal Output (32K_Out)

    SARA-G3 series - System Integration Manual In this way the different current consumption figures can be reached with the EXT32K input fed by the 32K_OUT output or by a proper external 32 kHz signal (for more details refer to section 1.5.1.3 and to SARA-G3 series Data Sheet “Current consumption”...

  • Page 43: Antenna Interface

    The antenna circuit affects the RF compliance of the device integrating SARA-G3 series module with applicable required certification schemes. Compliance is guaranteed if the antenna RF interface (ANT)
  • Page 44 SARA-G3 series - System Integration Manual For the additional specific requirement for SARA-G350 ATEX modules integration in potentially explosive atmospheres applications, refer to section 2.13. UBX-13000995 - R06 Objective Specification System description Page 44 of 218...

  • Page 45: Antenna Detection Interface (Ant_Det)

    SARA-G3 series - System Integration Manual 1.7.2 Antenna detection interface (ANT_DET) SARA-G300 and SARA-G310 modules do not support antenna detection interface (ANT_DET). The antenna detection is based on ADC measurement. The ANT_DET pin is an Analog to Digital Converter (ADC) provided to sense the antenna presence.
  • Page 46 SARA-G3 series - System Integration Manual  High logic level at SIM_DET input pin is recognized as SIM card present The SIM card detection function provided by SIM_DET pin is an optional feature that can be implemented / used or not according to the application requirements.

  • Page 47: Serial Interfaces

    FOAT feature  Auxiliary UART interface: 3-wire unbalanced 1.8 V asynchronous serial interface available only for the FW upgrade by means of the u-blox EasyFlash tool and for the Trace log capture (debug purpose)  DDC interface: I C compatible 1.8 V interface available only for the communication with u-blox positioning chips and modules 1.9.1 Asynchronous serial interface (UART)
  • Page 48 SARA-G3 series - System Integration Manual All flow control handshakes are supported by the UART interface and can be set by appropriate AT u-blox AT Commands Manual commands (see [2], &K, +IFC, \Q AT commands): hardware flow control (RTS/CTS), software flow control (XON/XOFF), or none flow control.
  • Page 49 SARA-G3 series - System Integration Manual Normal Transfer, 8N1 S tart of 1-Byte P os s ible S tart of trans fer next trans fer S tart Bit S top Bit (Always 0) (Always 1) = 1/(Baudrate) Figure 16: Description of UART default frame format (8N1) with fixed baud rate...
  • Page 50 SARA-G3 series - System Integration Manual 1.9.1.2 UART AT interface configuration The UART interface is the only AT command interface on SARA-G3 series modules. UART is configured u-blox AT Commands as described in Table 9Table 9 (for information about further settings, refer to the Manual [2]).
  • Page 51 SARA-G3 series - System Integration Manual TXD signal behavior The module data input line (TXD) is set by default to the OFF state (high level) at UART initialization. The TXD line is then held by the module in the OFF state if the line is not activated by the DTE: an active pull-up is enabled inside the module on the TXD input.
  • Page 52 SARA-G3 series - System Integration Manual CTS signal behavior The module hardware flow control output (CTS line) is set to the ON state (low level) at UART initialization. If the hardware flow control is enabled, the CTS line indicates when the UART interface is enabled (data can be sent and received).
  • Page 53 SARA-G3 series - System Integration Manual received without loss. The module cannot enter idle-mode and the UART is keep enabled as long as the RTS input line is held in the ON state  If the RTS input line is set to the OFF state by the DTE, the UART is disabled (held in low power...
  • Page 54 SARA-G3 series - System Integration Manual DTR signal behavior The DTR module input line is set by default to the OFF state (high level) at UART initialization. The module then holds the DTR line in the OFF state if the line is not activated by the DTE: an active pull- up is enabled inside the module on the DTR input.
  • Page 55 SARA-G3 series - System Integration Manual RI signal behavior The RI module output line is set by default to the OFF state (high level) at UART initialization. Then, during an incoming call, the RI line is switched from the OFF state to the ON state with a 4:1 duty...
  • Page 56 SARA-G3 series - System Integration Manual 1.9.1.4 UART and power-saving The power saving configuration is controlled by the AT+UPSV command (for the complete description, refer u-blox AT Commands Manual [2]). When power saving is enabled, the module automatically enters low power idle-mode whenever possible, and otherwise the active-mode is maintained by the module (see section 1.4 for definition and description of module operating modes referred to in this section).
  • Page 57 SARA-G3 series - System Integration Manual AT+UPSV HW flow control RTS line Communication during idle-mode and wake up Enabled (AT&K3) Not Applicable: HW flow control cannot be enabled with AT+UPSV=2. Enabled (AT&K3) Not Applicable: HW flow control cannot be enabled with AT+UPSV=2.
  • Page 58 SARA-G3 series - System Integration Manual AT+UPSV=1: power saving enabled, cyclic idle/active-mode The module automatically enters idle-mode whenever possible and, if the module is registered with network, it periodically wakes up from idle-mode to active-mode for at least ~11 ms to monitor the paging channel of the current base station (paging block reception), according to the GSM discontinuous reception (DRX) specification.
  • Page 59 SARA-G3 series - System Integration Manual If HW flow control is enabled, the hardware flow-control output (CTS line) indicates when the UART interface is enabled (data can be sent and received) as illustrated in Figure 19Figure Data input CTS OFF...
  • Page 60 SARA-G3 series - System Integration Manual AT+UPSV=2: power saving enabled and controlled by the RTS line This configuration can only be enabled with the module HW flow control disabled (AT&K0). The UART interface is immediately disabled after the DTE sets the RTS line to OFF. Then, if a voice or...
  • Page 61 SARA-G3 series - System Integration Manual Figure 20Figure 20 Figure 21Figure 21 show examples of common scenarios and timing constraints:  AT+UPSV=2 power saving configuration is active and the timeout from last data received to idle-mode start is set to 2000 frames due to the timeout previously set by AT+UPSV=1,2000 as the default case ...
  • Page 62 SARA-G3 series - System Integration Manual Figure 21Figure 21 shows the case where in addition to the wake-up character further (valid) characters are sent. The wake up character wakes-up the DCE UART. The other characters must be sent after the “wake up time”...

  • Page 63: Auxiliary Asynchronous Serial Interface (Uart Aux)

    RXD_AUX data output and TXD_AUX data input are provided), available for SARA-G3 modules FW upgrade by means of the u-blox EasyFlash tool and for Trace log capture (debug purpose). The AT commands interface is not available on the auxiliary UART interface.
  • Page 64 AT commands via the UART serial interface of the wireless module allows a fully control of the GNSS receiver from any host processor. SARA-G350 modules feature embedded GPS aiding that is a set of specific features developed by u-blox to enhance GNSS performance, decreasing Time To First Fix (TTFF), thus allowing to calculate the position in a shorter time with higher accuracy.

  • Page 65: Audio Interface

    VCC supply of the GNSS receiver is disabled. This enables the u-blox positioning receiver to recover from a power breakdown with either a hot start or a warm start (depending on the duration of the GNSS receiver VCC outage) and to maintain the configuration settings saved in the backup RAM.
  • Page 66 SARA-G3 series - System Integration Manual The analog audio input is selected when the parameter <main_uplink> in AT+USPM command is set to “Headset microphone”, “Handset microphone” or “Hands-free microphone”: the uplink analog path profiles u-blox use the same physical input but have different sets of audio parameters (for more details, refer to AT Commands Manual [2], AT+USPM, AT+UMGC, AT+UUBF, AT+UHFP commands).
  • Page 67 SARA-G3 series - System Integration Manual 1.10.1.2 Downlink path SARA-G350 pins related to the analog audio downlink path are:  SPK_P / SPK_N: Differential analog audio signal output (positive/negative). These two pins are directly connected internally to the differential output of a low power audio amplifier, for which the input is connected internally to the digital processing system by to an integrated digital-to-analog converter.

  • Page 68: Digital Audio Interface

    SARA-G3 series - System Integration Manual 1.10.2 Digital audio interface SARA-G350 modules provide one 4-wire I S digital audio interface (1.8 V) that acts as an I S master and can be used for digital audio communication with external digital audio devices that acts as I S slave.
  • Page 69 SARA-G3 series - System Integration Manual 1.10.2.1 I S interface – PCM mode Main features of the I S interface in PCM mode:  S runs in PCM – short alignment mode (configurable by AT commands)  S word alignment signal is configured to 8 kHz: this is the <sample_rate> parameter ...

  • Page 70: Voice-Band Processing System

    SARA-G3 series - System Integration Manual 1.10.3 Voice-band processing system 1.10.3.1 Audio processing system overview The voice-band processing on the SARA-G350 modules is implemented in the DSP core inside the baseband chipset. The analog audio front-end of the chipset is connected to the digital system through 16 bit ADC converters in the uplink path, and through 16 bit DAC converters in the downlink path.
  • Page 71 SARA-G3 series - System Integration Manual The circular buffer is a 3000 word buffer to store and mix the voice-band samples from Midi synthesizer. The buffer has a circular structure, so that when the write pointer reaches the end of the buffer, it is wrapped to the begin address of the buffer.

  • Page 72: General Purpose Input/Output (Gpio)

    SARA-G300 and SARA-G310 modules do not support GPIOs. SARA-G350 modules provide 4 pins (GPIO1-GPIO4) which can be configured as general purpose input or output, or can be configured to provide special functions via u-blox AT commands (for further details refer to the u-blox AT Commands Manual [2], +UGPIOC, +UGPIOR, +UGPIOW, +UGPS, +UGPRF).
  • Page 73 AT+UGPS command is set to 0 (default setting)  GNSS data ready: Only the GPIO3 pin provides the “GNSS data ready” function, to sense when a u-blox GNSS receiver connected to the wireless module is ready to send data via the DDC (I C) interface, setting the parameter <gpio_mode>...
  • Page 74 SARA-G3 series - System Integration Manual The pin configured to provide the “General purpose output” function is set as Output / Low, if the parameter <gpio_out_val> of AT+UGPIOW command is set to 0 Output / High, if the parameter <gpio_out_val> of AT+UGPIOW command is set to 1 ...

  • Page 75: Reserved Pins (Rsvd)

    SARA-G3 series - System Integration Manual 1.12 Reserved pins (RSVD) SARA-G3 modules have pins reserved for future use: they can all be left unconnected on the application board, except the RSVD pin number 33 that must be externally connected to ground.

  • Page 76: System Features

    SARA-G3 series - System Integration Manual 1.13 System features 1.13.1 Network indication Not supported by SARA-G300 and SARA-G310 modules. The GPIO1, or the GPIO2, GPIO3 and GPIO4 alternatively from their default settings, can be configured to indicate network status (i.e. no service, registered home network, registered visitor network, voice or data call enabled), by means of the AT+UGPIOC command.
  • Page 77 SARA-G3 series - System Integration Manual  On all such carriers, no synchronization is possible The client can configure the number of minimum disturbing carriers and the power level threshold by using the AT+UCD command [2]. The jamming condition is cleared when any of the above mentioned statements does not hold.

  • Page 78: Tcp/Ip And Udp/Ip

    SARA-G3 series - System Integration Manual 1.13.4 TCP/IP and UDP/IP Not supported by SARA-G300 and SARA-G310 modules. Via the AT commands it is possible to access the TCP/IP and UDP/IP functionalities over the Packet u-blox AT Commands Manual Switched data connection. For more details about AT commands see the [2].
  • Page 79 SARA-G3 series - System Integration Manual Emails can be sent with or without attachment. Attachments are store in the local file system of SARA- G350 modules. u-blox AT Commands Manual For more details about AT commands see the [2]. UBX-13000995 - R06...

  • Page 80: Smart Temperature Management

    SARA-G3 series - System Integration Manual 1.13.8 Smart temperature management Wireless modules – independent of the specific model – always have a well-defined operating temperature range. This range should be respected to guarantee full device functionality and long life span.
  • Page 81 The user can decide at anytime to enable/disable the Smart Temperature Supervisor feature. If the feature is disabled there is no embedded protection against disallowed temperature conditions. Figure 24Figure 24 shows the flow diagram implemented in SARA-G3 series modules for the Smart Temperature Supervisor. UBX-13000995 - R06...
  • Page 82 SARA-G3 series - System Integration Manual IF STS enabled Feature enabled Feature disabled: (full logic or no action indication only) Read temperature <Ti<t Temperature is within normal operating range Previously outside of Safe Area further actions <Ti<t Tempetature Tempetature Tempetature is...

  • Page 83: Assistnow Clients And Gnss Integration

    (upper limit of the extended temperature range) (*) SARA-G3 series module mounted on a 79 mm x 62 mm x 1.41 mm 4-Layers PCB with a high coverage of copper in still air conditions Table 12: Thresholds definition for Smart Temperature Supervisor on the SARA-G3 series modules...
  • Page 84 SARA-G3 series - System Integration Manual UBX-13000995 - R06 Objective Specification System description Page 84 of 218...

  • Page 85: Hybrid Positioning And Celllocate

    SARA-G3 series - System Integration Manual 1.13.10 Hybrid positioning and CellLocate Not supported by SARA-G300 and SARA-G310 versions. Although GNSS is a widespread technology, reliance on the visibility of extremely weak GNSS satellite signals means that positioning is not always possible, particularly in shielded environments such as indoors and enclosed park houses, or when a GNSS jamming signal is present.
  • Page 86 SARA-G3 series - System Integration Manual 2. CellLocate server defines the area of Cell A visibility 3. If a new device reports the observation of Cell A CellLocate is able to provide the estimated position from the area of visibility 4.

  • Page 87: Firmware Upgrade Over At (Foat)

    Refer to [21] for the complete description of the feature. u-blox is extremely mindful of user privacy. When a position is sent to the CellLocate server u-blox is unable to track the SIM used or the specific device. 1.13.11 Firmware upgrade Over AT (FOAT) 1.13.11.1 Overview...

  • Page 88: Firmware Upgrade Over The Air (Fota)

    SARA-G3 series - System Integration Manual 1.13.11.2 FOAT procedure The application processor must proceed in the following way:  Send the AT+UFWUPD command through UART interface, specifying the file type and the desired baud rate  Reconfigure serial communication at selected baud rate, without flow control with the used protocol ...

  • Page 89: Power Saving

    During low power idle-mode, the module is not ready to communicate with an external device by means of the application interfaces, since it is configured to reduce power consumption. It can be woken up from idle-mode to active-mode by the connected application processor, by the connected u-blox positioning receiver or by network activities, as described in...
  • Page 90 SARA-G3 series - System Integration Manual For the definition and the description of SARA-G3 series modules operating modes, including the events forcing transitions between the different operating modes, refer to section 1.4. For the description of current consumption in idle and active operating modes, refer to sections 1.5.1.2, 1.5.1.4.

  • Page 91: Design-In

    SARA-G3 series - System Integration Manual 2 Design-in For an optimal integration of SARA-G3 modules in the final application board follow the design guidelines stated in this section. Every application circuit must be properly designed to guarantee the correct functionality of the related interface, however a number of points require high attention during the design of the application device.

  • Page 92: Supply Interfaces

    SARA-G3 series - System Integration Manual 2.1 Supply interfaces 2.1.1 Module supply (VCC) 2.1.1.1 General guidelines for VCC supply circuit selection and design VCC pins are internally connected, but connect all the available pads to the external supply to minimize the power loss due to series resistance.
  • Page 93 SARA-G3 series - System Integration Manual directly connected to VCC is the usual choice for battery-powered devices. During charging, batteries with Ni-MH chemistry typically reach a maximum voltage that is above the maximum rating for VCC, and should therefore be avoided.
  • Page 94 SARA-G3 series - System Integration Manual kHz must be carefully evaluated since this can produce noise in the VCC voltage profile and therefore negatively impact GSM modulation spectrum performance. An additional L-C low-pass filter between the switching regulator output to VCC supply pins can mitigate the ripple on VCC, but adds extra voltage drop due to resistive losses on series inductors ...
  • Page 95 SARA-G3 series - System Integration Manual Reference Description Part Number - Manufacturer 10 µF Capacitor Ceramic X7R 5750 15% 50 V C5750X7R1H106MB - TDK 10 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C103KA01 - Murata 680 pF Capacitor Ceramic X7R 0402 10% 16 V...
  • Page 96 SARA-G3 series - System Integration Manual Reference Description Part Number - Manufacturer 5.2 µH Inductor 30% 5.28A 22 m MSS1038-522NL – Coilcraft 4.7 k Resistor 0402 1% 0.063 W RC0402FR-074K7L – Yageo 910  Resistor 0402 1% 0.063 W RC0402FR-07910RL – Yageo 82 ...
  • Page 97 SARA-G3 series - System Integration Manual Reference Description Part Number - Manufacturer C1, C2 10 µF Capacitor Ceramic X5R 0603 20% 6.3 V GRM188R60J106ME47 - Murata 47 kΩ Resistor 0402 5% 0.1 W RC0402JR-0747KL - Yageo Phycomp 9.1 kΩ Resistor 0402 5% 0.1 W RC0402JR-079K1L - Yageo Phycomp 3.9 kΩ...
  • Page 98 SARA-G3 series - System Integration Manual To avoid voltage drop undershoot and overshoot at the start and end of a transmit burst during a GSM call (when current consumption on the VCC supply can rise up to 1.9 A in the worst case), place a bypass capacitor with large capacitance (more than 100 µF) and low ESR near the VCC pins, for...
  • Page 99 SARA-G3 series - System Integration Manual Reference Description Part Number - Manufacturer 330 µF Capacitor Tantalum D_SIZE 6.3 V 45 T520D337M006ATE045 - KEMET mΩ 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C104KA01 - Murata 10 nF Capacitor Ceramic X7R 0402 10% 16 V...
  • Page 100 SARA-G3 series - System Integration Manual Li-Ion/Li-Polymer SARA-G3 series Battery Charger IC Supply INSNS OSNS Li-Ion/Li-Pol MODE Battery Pack ISEL θ Figure 31: Li-Ion (or Li-Polymer) battery charging application circuit Reference Description Part Number - Manufacturer Li-Ion (or Li-Polymer) battery pack with 470 ...

  • Page 101: Rtc Supply (V_Bckp)

    RF signal. This is more likely to happen with switching DC-DC converters, in which case it is better to select the highest operating frequency for the switcher and add a large L-C filter before connecting to the SARA-G3 series modules in the worst case. ...
  • Page 102 SARA-G3 series - System Integration Manual For example, a 100 µF capacitor (such as the Murata GRM43SR60J107M) can be placed at V_BCKP to provide a long buffering time. This capacitor holds V_BCKP voltage within its valid range for around 50 s at 25 °C, after the VCC supply is removed.
  • Page 103 SARA-G3 series - System Integration Manual Combining a SARA-G3 wireless module with a u-blox GNSS positioning receiver, the positioning receiver VCC supply is controlled by the wireless module by means of the “GNSS supply enable” function provided by the GPIO2 of the wireless module. In this case the V_BCKP supply output of the SARA-G3 wireless...

  • Page 104: Interface Supply (V_Int)

    Supply voltage translators to connect digital interfaces of the module to a 3.0 V device (see section 2.5.1)  Supply a 1.8 V u-blox 6 or subsequent GNSS receiver (see section 2.5.3 for more details)  Indicate when the module is switched on...
  • Page 105 SARA-G3 series - System Integration Manual 2.1.3.2 Guidelines for V_INT layout design V_INT digital interfaces supply output is generated by an integrated switching step-down converter, used internally to supply the digital interfaces. Because of this, it can be a source of noise: avoid coupling with sensitive signals.

  • Page 106: System Functions Interfaces

    SARA-G3 series - System Integration Manual 2.2 System functions interfaces 2.2.1 Module power-on (PWR_ON) 2.2.1.1 Guidelines for PWR_ON circuit design Connecting the PWR_ON input to a push button that shorts the PWR_ON pin to ground, provide an external pull-up resistor (e.g. 100 kΩ) biased by the V_BCKP supply pin of the module, as described...
  • Page 107 SARA-G3 series - System Integration Manual SARA-G3 series Application SARA-G3 series Processor V_BCKP V_BCKP Open Power-on Rext Rext Drain push button Output PWR_ON PWR_ON Figure 33: PWR_ON application circuits using a push button and an open drain output of an application processor...

  • Page 108: Module Reset (Reset_N)

    SARA-G3 series - System Integration Manual 2.2.1.2 Guidelines for PWR_ON layout design The power-on circuit (PWR_ON) requires careful layout since it is the sensitive input available to switch on the SARA-G3 modules until a valid VCC supply is provided after that the module has been switched...
  • Page 109 SARA-G3 series - System Integration Manual If the external reset function is not required by the customer application, the RESET_N input pin can be left unconnected to external components, but it is recommended providing direct access on the application board by means of accessible testpoint directly connected to the RESET_N pin.

  • Page 110: 32 Khz Signal (Ext32K And 32K_Out)

    SARA-G3 series - System Integration Manual 2.2.2.2 Guidelines for RESET_N layout design The reset circuit (RESET_N) requires careful layout due to the pin function: ensure that the voltage level is well defined during operation and no transient noise is coupled on this line, otherwise the module might detect a spurious reset request.
  • Page 111 SARA-G3 series - System Integration Manual Reference Description Remarks 100 nF Capacitor Ceramic X7R 0402 10% 16 GRM155R61A104KA01 - Murata Low Power Clock Oscillator 32.768 kHz OV-7604-C7 - Micro Crystal or SG-3040LC - EPSON TOYOCOM Table 21: Example of components for the EXT32K application circuit...

  • Page 112: Antenna Interface

    Linear monopole / External antenna: External antenna usage basically does not imply physical restriction to the design of the PCB where the SARA-G3 series module is mounted The radiation performance mainly depends on the antenna: select the antenna with optimal...
  • Page 113 SARA-G3 series - System Integration Manual Select an integrated antenna solution provided by an antenna manufacturer if the required ground plane dimensions are large enough according to the related integrated antenna solution specifications: the antenna selection and the definition of its placement in the product layout...
  • Page 114 SARA-G3 series - System Integration Manual GND clearance on top layer GND clearance on buried layer around ANT pad below ANT pad M in. 250 µm M in. 400 µm Figure 37: GND keep-out area on the top layer around ANT pad and on the very close buried layer below ANT pad...
  • Page 115 SARA-G3 series - System Integration Manual 400 um 1200 um 400 um L1 Copper 35 um FR-4 dielectric 1510 um L2 Copper 35 um Figure 39: Example of 50  coplanar waveguide transmission line design for the described 2-layer board layup If the two examples do not match the application PCB layup, the 50 ...
  • Page 116 SARA-G3 series - System Integration Manual  Ensure solid metal connection of the adjacent metal layer on the PCB stack-up to main ground layer, providing enough on the adjacent metal layer, as described in Figure 40Figure 40  Route RF transmission line far from any noise source (as switching supplies and digital lines) and from any sensitive circuit (as analog audio lines) ...
  • Page 117 SARA-G3 series - System Integration Manual If an external antenna is used, the antenna connector represents the RF termination on the PCB:  Use a suitable 50  connector providing proper PCB-to-RF-cable transition  Strictly follow the connector manufacturer’s recommended layout, for example: SMA Pin-Through-Hole connectors require GND keep-out (i.e.

  • Page 118: Antenna Detection Interface (Ant_Det)

    SARA-G3 series - System Integration Manual 2.3.2 Antenna detection interface (ANT_DET) 2.3.2.1 Guidelines for ANT_DET circuit design Figure 41Figure 41 Table 22Table 22 describe the recommended schematic and components for the antenna detection circuit to be provided on the application board for the diagnostic circuit that must be provided on the antenna assembly to achieve antenna detection functionality.
  • Page 119 SARA-G3 series - System Integration Manual Formatted: English (U.S.)  Additional components (R1, C1 and D1 in Figure 41Figure 41) are needed at the ANT_DET pin as ESD protection  The ANT pin must be connected to the antenna connector by means of a transmission line with nominal characteristics impedance as close as possible to 50 ...
  • Page 120 SARA-G3 series - System Integration Manual 2.3.2.1 Guidelines for ANT_DET layout design Figure 42Figure 42 describes the recommended layout for the antenna detection circuit to be provided on the application board to achieve antenna detection functionality, implementing the recommended schematic...

  • Page 121: Sim Interface

    SARA-G3 series - System Integration Manual 2.4 SIM interface 2.4.1.1 Guidelines for SIM circuit design Guidelines for SIM cards, SIM connectors and SIM chips selection The ISO/IEC 7816, the ETSI TS 102 221 and the ETSI TS 102 671 specifications define the physical,...
  • Page 122 SARA-G3 series - System Integration Manual  Package Pin 7 = UICC Contact C2 = RST (Reset) It must be connected to  SIM_RST  Package Pin 6 = UICC Contact C3 = CLK (Clock) It must be connected to ...
  • Page 123 SARA-G3 series - System Integration Manual  Limit capacitance and series resistance on each SIM signal (SIM_CLK, SIM_IO, SIM_RST) to match the requirements for the SIM interface (27.7 ns is the maximum allowed rise time on the SIM_CLK line, 1.0 µs is the maximum allowed rise time on the SIM_IO and SIM_RST lines)
  • Page 124 SARA-G3 series - System Integration Manual SARA-G3 series V_INT SIM CHIP SIM _DET VPP (C6) VSIM VCC (C1) SIM _IO IO (C7) SIM _CLK CLK (C3) SIM _RST RST (C2) SIM Chip Bottom View GND (C5) (contacts side) C2 C3...
  • Page 125 SARA-G3 series - System Integration Manual  Provide a bypass capacitor of about 22 pF to 47 pF (e.g. Murata GRM1555C1H470J) on each SIM line (VSIM, SIM_CLK, SIM_IO, SIM_RST), very close to each relevant pad of the SIM connector, to prevent RF coupling especially in case the RF antenna is placed closer than 10 - 30 cm from the SIM card holder ...
  • Page 126 SARA-G3 series - System Integration Manual SARA-G3 modules do not support the usage of two SIM at the same time, but two SIM can be populated on the application board providing a proper switch to connect only the first or only the second...
  • Page 127 SARA-G3 series - System Integration Manual  Connect the other pin of the mechanical switch integrated in the two SIM connectors (e.g. the SW1 pins as described in Figure 46Figure 46) to the V_INT 1.8 V supply output of the module by means of a strong (e.g.
  • Page 128 SARA-G3 series - System Integration Manual Reference Description Part Number - Manufacturer C1 – C4, C6 – 33 pF Capacitor Ceramic C0G 0402 5% 25 V GRM1555C1H330JZ01 - Murata C5, C10 – C12 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C104KA01 - Murata D1 –...
  • Page 129 The layout of the SIM card interface lines (VSIM, SIM_CLK, SIM_IO, SIM_RST) may be critical if the SIM card is placed far away from the SARA-G3 series modules or in close proximity to the RF antenna: these two cases should be avoided or at least mitigated as described below.

  • Page 130: Serial Interfaces

    SARA-G3 series - System Integration Manual 2.5 Serial interfaces 2.5.1 Asynchronous serial interface (UART) 2.5.1.1 Guidelines for UART circuit design Providing the full RS-232 functionality (using the complete V.24 link) If RS-232 compatible signal levels are needed, two different external voltage translators (e.g. Maxim MAX3237E and Texas Instruments SN74AVC8T245PW) can be used to provide full RS-232 (9 lines) functionality.
  • Page 131 SARA-G3 series - System Integration Manual Reference Description Part Number - Manufacturer C1, C2, C3, C4 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R61A104KA01 - Murata U1, U2 Unidirectional Voltage Translator SN74AVC4T774 - Texas Instruments Table 27: Component for UART application circuit with complete V.24 link in DTE/DCE serial communication (3.0 V DTE) Providing the TXD, RXD, RTS and CTS lines only (not using the complete V.24 link)
  • Page 132 SARA-G3 series - System Integration Manual Reference Description Part Number - Manufacturer C1, C2 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R61A104KA01 - Murata Unidirectional Voltage Translator SN74AVC4T774 - Texas Instruments Table 28: Component for UART application circuit with partial V.24 link (5-wire) in DTE/DCE serial communication (3.0 V DTE)
  • Page 133 SARA-G3 series - System Integration Manual If a 3.0 V Application Processor is used, appropriate unidirectional voltage translators must be provided using the module V_INT output as 1.8 V supply, as described in Figure 52Figure Application Processor SARA-G3 series (3.0V DTE) (1.8V DCE)

  • Page 134: Auxiliary Asynchronous Serial Interface (Uart Aux)

    EasyFlash tool and for Trace log capture (debug purpose). To directly enable PC (or similar) connection to the module for firmware upgrade using the u-blox EasyFlash tool and for debugging purposes, it is highly recommended to provide direct access on the application board to the TXD_AUX and RXD_AUX pins, by means of accessible testpoints directly connected to the pins of the module.
  • Page 135 Refer to [22] for additional guidelines regarding the procedure for SARA- G3 modules’ firmware upgrade over the auxiliary UART interface using the u-blox EasyFlash tool. Any external signal connected to the auxiliary UART interface must be tri-stated or set low when...
  • Page 136 The SDA and SCL lines must be connected to the DDC (I C) interface pins of the u-blox GNSS receiver (i.e. the SDA2 and SCL2 pins of the u-blox positioning receiver) on the application board to allow the communication between the wireless module and the u-blox GNSS receiver, enabled by the...
  • Page 137 RAM when the VCC supply of the wireless module is within its operating range and the VCC supply of the GNSS receiver is disabled. This enables the u-blox GNSS receiver to recover from a power breakdown with either a Hot-start or a Warm-start (depending on the actual duration of the GNSS VCC outage) and to maintain the configuration settings saved in the backup RAM.
  • Page 138 As an alternative to using an external voltage regulator, the V_INT supply output of SARA-G350 wireless modules can be used to supply a u-blox 1.8 V GNSS receiver of the u-blox 6 family (or later u-blox family). The V_INT supply is able to withstand the maximum current consumption of these positioning receivers.
  • Page 139 TxD1 GPIO3 GNSS RTC sharing EXTINT0 GPIO4 DIR2 Figure 56: DDC (I C) application circuit for u-blox 3.0 V GNSS receiver Reference Description Part Number – Manufacturer R1, R2 4.7 kΩ Resistor 0402 5% 0.1 W RC0402JR-074K7L - Yageo Phycomp 47 kΩ...

  • Page 140: Audio Interface

    SARA-G3 series - System Integration Manual 2.6 Audio Interface 2.6.1 Analog Audio interface 2.6.1.1 Guidelines for microphone and speaker connection circuit design (headset / handset modes) SARA-G350 modules provide one analog audio input path and one analog audio output path: the same paths are used for both headset and handset modes, so that basically the same application circuit can be implemented for both headset and handset modes.
  • Page 141 SARA-G3 series - System Integration Manual Mount a 27 pF bypass capacitor (e.g. Murata GRM1555C1H270J) from each microphone line to solid ground plane (C4 and C5 capacitors in Figure 57Figure 57). Formatted: English (U.S.)  Use a microphone designed for GSM applications, which typically has an internal built-in bypass capacitor.
  • Page 142 SARA-G3 series - System Integration Manual Reference Description Part Number – Manufacturer L1, L2 82 nH Multilayer inductor 0402 LQG15HS82NJ02 – Murata (self resonance frequency ~1 GHz) 2.2 kΩ Electret Microphone Various Manufacturers R1, R2, R3, R4 2.2 kΩ Resistor 0402 5% 0.1 W RC0402JR-072K2L –...
  • Page 143 SARA-G3 series - System Integration Manual 2.6.1.2 Guidelines for microphone and loudspeaker connection circuit design (hands-free mode) Figure 58Figure 58 shows an application circuit for the analog audio interface in hands-free mode, connecting a 2.2 k electret microphone and an 8  or 4  loudspeaker: ...
  • Page 144 SARA-G3 series - System Integration Manual the 8  or 4  loudspeaker. (See the Analog Devices SSM2305CPZ filter-less mono 2.8 W class-D Audio Amplifier in the circuit described in Figure 58Figure 58.)  Provide proper parts on each line connected to the external loudspeaker as noise and EMI improvments, to minimize RF coupling, according to EMC requirements of the custom application.
  • Page 145 SARA-G3 series - System Integration Manual Reference Description Part Number – Manufacturer R5, R6 0 Ω Resistor 0402 5% 0.1 W RC0402JR-070RL – Yageo Phycomp Filter-less Mono 2.8 W Class-D Audio Amplifier SSM2305CPZ – Analog Devices Table 34: Example of components for analog audio interface hands-free mode application circuit If the analog audio interface is not used, the analog audio pins (MIC_BIAS, MIC_GND, MIC_P, MIC_N, SPK_P, SPK_N) can be left unconnected on the application board.
  • Page 146 SARA-G3 series - System Integration Manual 2.6.1.3 Guidelines for external analog audio device connection circuit design The differential analog audio input / output can be used to connect the module to an external analog audio device. Audio devices with a differential analog input / output are preferable, as they are more immune to external disturbances.
  • Page 147 SARA-G3 series - System Integration Manual u-blox AT  The signal levels can be adapted by setting gain using AT commands (refer to the Formatted: English (U.S.) Commands Manual [2][2], +USGC, +UMGC), but additional circuitry must be inserted if the SPK_P...

  • Page 148: Digital Audio Interface

    SARA-G3 series - System Integration Manual  Place bypass capacitor for RF very close to active microphone. The preferred microphone should be designed for GSM applications which typically have internal built-in bypass capacitor for RF very close to active device. If the integrated FET detects the RF burst, the resulting DC level will be in the...
  • Page 149 SARA-G3 series - System Integration Manual stated or set low, insert a multi channel digital switch (e.g. Texas Instruments SN74CB3Q16244, TS5A3159, or TS5A63157) between the two-circuit connections and set to high impedance during module power down mode and during the module power-on sequence.

  • Page 150: General Purpose Input/Output (Gpio)

     GNSS data ready: The GPIO3 pin, by default configured to provide the “GNSS data ready” function, has to be connected to the data ready output of the u-blox GNSS receiver (i.e. the pin TXD1).  GNSS RTC sharing: The GPIO4 pin, by default configured to provide the “GNSS RTC sharing” function, has to be connected to the RTC synchronization input of the u-blox GNSS receiver (i.e.
  • Page 151 SARA-G3 series - System Integration Manual module. If the external signals connected to the wireless module cannot be tri-stated or set low, insert a multi channel digital switch (e.g. Texas Instruments SN74CB3Q16244, TS5A3159, or TS5A63157) between the two-circuit connections and set to high impedance during module power down mode and during the module power-on sequence.

  • Page 152: Reserved Pins (Rsvd)

    SARA-G3 series - System Integration Manual 2.8 Reserved pins (RSVD) SARA-G3 series modules have pins reserved for future use. All the RSVD pins, except pin number 33, can be left unconnected on the application board. Figure 62Figure 62 illustrates the application circuit.

  • Page 153: Module Footprint And Paste Mask

    O’’ Stencil: 150 H’ H’’ µm J’ J’’ F’ F’’ F’ F’’ Figure 63: SARA-G3 series modules suggested footprint and paste mask (application board top view) Parameter Value Parameter Value Parameter Value 26.0 mm 1.10 mm 2.75 mm 16.0 mm H’...
  • Page 154 SARA-G3 series - System Integration Manual These are recommendations only and not specifications. The exact copper, solder and paste mask geometries, distances, stencil thicknesses and solder paste volumes must be adapted to the specific production processes (e.g. soldering etc.) of the customer.

  • Page 155: Thermal Guidelines

    Mounting a SARA-G3 series module on a 79 mm x 62 mm x 1.41 mm 4-Layers PCB with a high coverage of copper in still air conditions...
  • Page 156 ~2 °C during a GPRS data transfer (2 TX slots, 3 RX slots) at the maximum TX power Beside the reduction of the Module-to-Ambient thermal resistance implemented by the hardware design of the application device integrating a SARA-G3 series module, the increase of module temperature can be moderated by the software implementation of the application.

  • Page 157: Esd Guidelines

    2.12 ESD guidelines 2.12.1 ESD immunity test overview The immunity of devices integrating SARA-G3 series modules to Electro-Static Discharge (ESD) is part of the Electro-Magnetic Compatibility (EMC) conformity, which is required for products bearing the CE marking, compliant with the R&TTE Directive (99/5/EC), the EMC Directive (89/336/EEC) and the Low Voltage Directive (73/23/EEC) issued by the Commission of the European Community.

  • Page 158: Esd Application Circuits

    SARA-G3 series - System Integration Manual The EMC / ESD approved u-blox reference designs consist of a SARA-G3 series module soldered onto a motherboard which provides supply interface, SIM card, headset and communication port. An external antenna is connected to an SMA connector provided on the motherboard for the GSM antenna.
  • Page 159 38Table Antenna interface The ANT pin of SARA-G3 series modules provides ESD immunity up to ±4 kV for direct Contact Discharge and up to ±8 kV for Air Discharge: no further precaution to ESD immunity test is needed, as implemented in the EMC / ESD approved reference design of SARA-G3 series modules.
  • Page 160 SARA-G3 series - System Integration Manual Other pins and interfaces All the module pins that are externally accessible on the device integrating SARA-G3 series module should ETSI EN 301 be included in the ESD immunity test since they are considered to be a port as defined in 489-1 [16].

  • Page 161: Sara-G350 Atex Integration In Explosive Atmospheres Applications

    SARA-G3 series - System Integration Manual 2.13 SARA-G350 ATEX integration in explosive atmospheres applications 2.13.1 General guidelines SARA-G350 ATEX modules are certified as components intended for use in potentially explosive SARA-G3 series Data atmospheres (refer to section 4.5 and refer to the ‘Approvals‘ section of the...

  • Page 162: Guidelines For Vcc Supply Circuit Design

    SARA-G3 series - System Integration Manual application, as for example the IEC 60079-0 [27], IEC 60079-11 [28], IEC 60079-26 [29] standards. The certification of the application device that integrates a SARA-G350 ATEX module and the compliance of the application device with all the applicable certification schemes, directives and standards required for use in potentially explosive atmospheres are the sole responsibility of the application device manufacturer.
  • Page 163 SARA-G3 series - System Integration Manual The following maximum input and equivalent parameters must be considered in gas sub-divisions IIB, IIA:  Ui = 4.2 V  Ii = 2.5 A (burst)  Pi = 2.5 W  Ci = 103 µF ...

  • Page 164: Guidelines For Antenna Rf Interface Design

    SARA-G3 series - System Integration Manual explosive atmospheres. Any specific applicable requirement for the VCC supply circuit design must be fulfilled according to all the exact applicable standards for the apparatus. Check the detailed requisites on the pertinent normatives for the application apparatus, as for example the IEC 60079-0 [27], IEC 60079-11 [28], IEC 60079-26 [29] standards.

  • Page 165: Schematic For Sara-G3 Series Module Integration

    SARA-G3 series - System Integration Manual 2.14 Schematic for SARA-G3 series module integration Figure 64Figure 64 is an example of a schematic diagram where a SARA-G350 module is integrated into an application board, using all the available interfaces and functions of the module.
  • Page 166 SARA-G3 series - System Integration Manual SARA-G350 External Connector 33pF Antenna 82nH ANT_DET 330µF 100nF 10nF 56pF 15pF 27pF V_BCKP SIM Card Holder V_BCKP V_INT 100µF back-up SIM _DET VSIM CCVCC (C1) Application CCVPP (C6) Processor 100kΩ SIM _IO CCIO (C7)
  • Page 167 SARA-G3 series - System Integration Manual Figure 65Figure 65 is an example of a schematic diagram where a SARA-G300 / SARA-G310 module is integrated into an application board, using all the available interfaces and functions of the module. SARA-G300/ G310...
  • Page 168 SARA-G3 series - System Integration Manual UBX-13000995 - R06 Objective Specification Design-in Page 168 of 218...

  • Page 169: Design-In Checklist

    Provide accessible testpoints directly connected to the following pins: TXD_AUX and RXD_AUX pins, V_INT pin, PWR_ON and/or RESET_N pins, to allow the module firmware upgrade using the u-blox EasyFlash tool and to allow the trace log capture (debug purpose). ...
  • Page 170 SARA-G3 series - System Integration Manual  All unused pins can be left unconnected except the PWR_ON pin (its level must be properly fixed, e.g. adding a 100 k pull-up to V_BCKP) and the RSVD pin number 33 (it must be connected to GND).

  • Page 171: Layout Checklist

    SARA-G3 series - System Integration Manual 2.15.2 Layout checklist The following are the most important points for a simple layout check:  Check 50  nominal characteristic impedance of the RF transmission line connected to the ANT pad (antenna RF input/output interface).

  • Page 172: Handling And Soldering

    [1] and the Package Information Guide [24]. The SARA-G3 series modules are Electro-Static Discharge (ESD) sensitive devices. Ensure ESD precautions are implemented during handling of the module. 3.2 Soldering 3.2.1 Soldering paste Use of "No Clean"...
  • Page 173 SARA-G3 series - System Integration Manual Preheat phase Initial heating of component leads and balls. Residual humidity will be dried out. Note that this preheat phase will not replace prior baking procedures.  Temperature rise rate: max 3 °C/s If the temperature rise is too rapid in the preheat phase it may cause excessive slumping.
  • Page 174 60 - 120 s Typical Leadfree Soldering Profile E lapsed time [s] Figure 66: Recommended soldering profile SARA-G3 series modules must not be soldered with a damp heat process. UBX-13000995 - R06 Objective Specification Handling and soldering Page 174 of 218...

  • Page 175: Optical Inspection

    SARA-G3 series - System Integration Manual 3.2.3 Optical inspection After soldering the SARA-G3 series modules, inspect the modules optically to verify that the module is properly aligned and centered. 3.2.4 Cleaning Cleaning the soldered modules is not recommended. Residues underneath the modules cannot be easily removed with a washing process.

  • Page 176: Conformal Coating

    These materials affect the HF properties of the SARA-G3 series modules and it is important to prevent them from flowing into the module. The RF shields do not provide 100% protection for the module from coating liquids with low viscosity, therefore care is required in applying the coating.

  • Page 177: Casting

    3.2.10 Casting If casting is required, use viscose or another type of silicon pottant. The OEM is strongly advised to qualify such processes in combination with the SARA-G3 series modules before implementing this in the production. Casting will void the warranty.

  • Page 178: Approvals

    The required certification scheme approvals and relative testing specifications differ depending on the country or the region where the device that integrates SARA-G3 series modules must be deployed, on the relative vertical market of the device, on type, features and functionalities of the whole application device, and on the network operators where the device must operate.
  • Page 179 SARA-G3 series - System Integration Manual The PICS document of the application device integrating a SARA-G3 module must be updated from the module PICS statement if any feature stated as supported by the module in its PICS document is not implemented or disabled in the application device, as for the following cases:...

  • Page 180: Federal Communications Commission And Industry Canada Notice

    The FCC requires the user to be notified that any changes or modifications made to this device that are not expressly approved by u-blox could void the user's authority to operate the equipment. Manufacturers of mobile or fixed devices incorporating SARA-G310 / SARA-G350 modules are authorized to use the FCC Grants and Industry Canada Certificates of SARA-G310 / SARA-G350 modules for their own final products according to the conditions referenced in the certificates.
  • Page 181 Informations concernant l'exposition aux fréquences radio (RF) La puissance de sortie émise par l’appareil de sans fil u-blox Wireless Module est inférieure à la limite d'exposition aux fréquences radio d'Industrie Canada (IC). Utilisez l’appareil de sans fil u-blox Wireless Module de façon à...

  • Page 182: R&Tted And European Conformance Ce Mark

    4.3 R&TTED and European Conformance CE mark SARA-G3 series modules have been evaluated against the essential requirements of the 1999/5/EC Directive. In order to satisfy the essential requirements of the 1999/5/EC Directive, the modules are compliant with the following standards: ...

  • Page 183: Anatel Certification

    SARA-G3 series - System Integration Manual There is no restriction for the commercialization of the SARA-G3 series modules in all the countries of the European Union. Anatel certification SARA-G310 and SARA-G350 modules are certified by the Brazilian Agency of Telecommunications (Agência Nacional de Telecomunicações in Portuguese) (Anatel).

  • Page 184: Sara-G350 Atex Conformance For Use In Explosive Atmospheres

    SARA-G3 series - System Integration Manual 4.5 SARA-G350 ATEX conformance for use in explosive atmospheres SARA-G350 ATEX modules are certified as components intended for use in potentially explosive atmospheres compliant to the following standards:  IEC 60079-0: 2011  IEC 60079-11: 2011 ...

  • Page 185: Product Testing

    5 Product Testing 5.1 u-blox in-series production test u-blox focuses on high quality for its products. All units produced are fully tested. Defective units are analyzed in detail to improve the production quality. This is achieved with automatic test equipment, which delivers a detailed test report for each unit. The following measurements are done: ...

  • Page 186: Go/No Go" Tests For Integrated Devices

    SARA-G3 series - System Integration Manual  Module assembly on the device; it should be verified that: Soldering and handling process did not damaged the module components All module pins are well soldered on device board There are no short circuits between pins ...
  • Page 187 The use of this feature is intended for testing purpose in controlled environments by qualified user and must not be used during the normal module operation. Follow instructions suggested in u-blox documentation. u-blox assumes no responsibilities for the inappropriate use of this feature.
  • Page 188 To avoid module damage during transmitter test when good antenna termination is not guaranteed, use a low Power Control Level (i.e. PCL lower or equal to 15). u-blox assumes no responsibilities for module damaging caused by an inappropriate use of this feature.

  • Page 189: Appendix

    28 29 30 31 32 33 34 35 36 37 38 Figure 69: LISA series vs. SARA-G3 series modules pin assignment: highlighted pads that can be shared on the application board This is the basis of the Nested Design concept: any SARA-G3, LISA-U1, LISA-U2, or LISA-C2 module...

  • Page 190: Checklist For Migration

    [1], [3], [4], [5], System Integration Manual [6], [7], and AT commands manual [2], [8]. A.2 Checklist for migration Have you chosen the optimal SARA-G3 series module? For quad-band GSM/GPRS, full feature set, select the SARA-G350 module. For quad-band GSM/GPRS, reduced feature set, select the SARA-G310 module.
  • Page 191 Check serial interfaces requirements: SARA-G3 modules provide UART interface for AT command, data communication, multiplexer functionality, FW upgrade over AT and provide auxiliary UART interface for FW upgrade using the u-blox EasyFlash tool and for Trace log capture (debug purpose).

  • Page 192: Software Migration

    Integration Manual of the module [6], [7]. RTC supply input/output (V_BCKP) The same compatible external circuit can be implemented for SARA-G3 series and LISA-U series even if there are minor differences in the V_BCKP typical output voltage and input voltage range as reported in Table 42Table 42 or in the relative datasheet of the module [1], [3], [4], [5].
  • Page 193 SARA-G3 series - System Integration Manual Interfaces supply output (V_INT) The same compatible external circuit can be implemented for SARA-G3 series and LISA series: there are no differences in the V_INT output characteristics. UBX-13000995 - R06 Objective Specification Appendix Page 193 of 218...

  • Page 194: System Functions Interfaces

    [1], [3], [4], [5]. PWR_ON falling edge (i.e. low pulse) is required for LISA series, but it is not required for SARA-G3 series. External pull-up is not needed for LISA-C2 series since internal pull-up is provided.
  • Page 195 SARA-G3 series - System Integration Manual External 32 kHz input and internal 32 kHz output The EXT32K input and the 32K_OUT output are available only on the SARA-G300 and SARA-G310 modules to provide the 32 kHz reference clock for the Real Time Clock (RTC) timing, used by the module processor to reach the low power idle-mode and provide the RTC functions.

  • Page 196: Antenna Interface

    A.4.3 Antenna interface RF interface for Tx/Rx antenna The same compatible external circuit can be implemented for SARA-G3 series and LISA series ANT pin even if there are some differences in the operating bands frequency ranges, as summarized in Figure...
  • Page 197 SARA-G3 series - System Integration Manual Antenna detection interface An external application circuit can be implemented on the application device integrating SARA-G350 modules to provide antenna detection functionality, with a proper connection between the ANT_DET pin and the ANT pin, as described in section 2.3.2.

  • Page 198: Sim Interface

    SARA-G3 modules do not provide a USB interface such as is available on LISA-U modules (High-Speed USB 2.0 for AT command, data communication, FW upgrade over AT or using the u-blox EasyFlash tool, and for Trace log capture) and on LISA-C2 modules (Full-Speed USB 2.0 for AT command, Data communication, FW upgrade).

  • Page 199: Audio Interfaces

    C) interface in the upcoming firmware releases. All LISA-U2 modules, except LISA-U200-00S, additionally support the communication with I C slaves by means of dedicated AT commands, other than u-blox positioning receivers over the same DDC (I interface. A.4.6 Audio interfaces...

  • Page 200: Gpio Pins

    SARA-G3 series modules rather than the GPIO5 pin as on LISA-U series modules. SARA-G300 and SARA-G310 modules do not provide GPIOs. A.4.8 Reserved pins SARA-G3 series modules RSVD pin 33 must be connected to ground, as does the RSVD pin 5 on LISA series modules. UBX-13000995 - R06...

  • Page 201: Pin-Out Comparison Between Lisa And Sara

    SARA-G3 series - System Integration Manual A.4.9 Pin-out comparison between LISA and SARA Table 42Table 42 summarizes the pin electrical differences between LISA and SARA wireless modules. Pin Name N° SARA-G3 series N° LISA-C2 series LISA-U1 series LISA-U2 series Power 51-53 Normal op.
  • Page 202 SARA-G3 series - System Integration Manual Pin Name N° SARA-G3 series N° LISA-C2 series LISA-U1 series LISA-U2 series EXT32K SARA-G300/G310: Not Available: Not Available: Not Available: 32 kHz input for RTC Internal reference for Internal 32 kHz for Internal 32 kHz for &...
  • Page 203 SARA-G3 series - System Integration Manual Pin Name N° SARA-G3 series N° LISA-C2 series LISA-U1 series LISA-U2 series UART AUX TXD_AUX 1.8 V, Data input Not Available Not Available Not Available Internal pull-up: -102 µA RXD_AUX 1.8 V, Data output...
  • Page 204 SARA-G3 series - System Integration Manual Pin Name N° SARA-G3 series N° LISA-C2 series LISA-U1 series LISA-U2 series SPK_P SARA-G350 only: Differential output (+) LISA-U120/U130 only: Not Available Differential output (+) Differential output (+) 32 ohm load capable 16 ohm load capable...
  • Page 205 SARA-G3 series - System Integration Manual Pin Name N° SARA-G3 series N° LISA-C2 series LISA-U1 series LISA-U2 series I2S1_RXD Not Available Not Available Not Available 1.8 V, Clock In/Out Configurable frequency Inner pull-down: 150 µA Driver strength: 1 mA LISA-U200-00S: N.A.
  • Page 206 SARA-G3 series - System Integration Manual Pin Name N° SARA-G3 series N° LISA-C2 series LISA-U1 series LISA-U2 series GPIO7 Not Available Not Available Not Available 1.8 V, configurable GPIO Default: I2S1_TXD Driver strength: 1 mA Inner pull-down: 150 µA GPIO8...

  • Page 207: Overview

    25 26 28 29 31 32 Figure 72: SARA-G3 series and SARA-U2 series modules pad layout and pin assignment Table 43Table 43 summarizes the interfaces provided by SARA-G3 and SARA-U2 series modules: all the interfaces provided by different modules are electrically compatible, so that the same compatible external circuit can be implemented on the application board.

  • Page 208: Pin-Out Comparison Between Sara-G3 And Sara-U2

    SARA-G3 series - System Integration Manual B.2 Pin-out comparison between SARA-G3 and SARA-U2 SARA-G3 SARA-U2 Pin No Pin Name Description Pin Name Description Remarks for migration Ground Ground V_BCKP RTC Supply I/O V_BCKP RTC Supply I/O No functional difference Ground...
  • Page 209 SARA-G3 series - System Integration Manual SARA-G3 SARA-U2 Pin No Pin Name Description Pin Name Description Remarks for migration SPK_N / RSVD Analog Audio Out (-) / RSVD Reserved Analog audio not supported Reserved MIC_BIAS / Microphone Supply Out /...

  • Page 210: Schematic For Sara-G3 And Sara-U2 Integration

    SARA-G3 series - System Integration Manual B.3 Schematic for SARA-G3 and SARA-U2 integration Figure 73Figure 73 shows an example of schematic diagram where SARA-G3 and SARA-U2 series modules are integrated into the same application board, using all the available interfaces and functions of the modules.

  • Page 211: C Glossary

    SARA-G3 series - System Integration Manual C Glossary 3GPP 3rd Generation Partnership Project Analog to Digital Converter Application Processor AT Command Interpreter Software Subsystem, or attention Coding Scheme Circuit Switched Data Clear To Send Direct Current Data Carrier Detect Data Communication Equipment...
  • Page 212 SARA-G3 series - System Integration Manual HTTP HyperText Transfer Protocol HTTPS Hypertext Transfer Protocol over Secure Socket Layer Hardware In phase and Quadrature Inter-Integrated Circuit interface Inter IC Sound interface Internet Protocol Leadless Chip Carrier Low-Dropout Land Grid Array Low Noise Amplifier...
  • Page 213 SARA-G3 series - System Integration Manual Up-link (Transmission) UMTS Universal Mobile Telecommunications System Universal Serial Bus UTRA UMTS Terrestrial Radio Access Voltage Controlled Oscillator VSWR Voltage Standing Wave Ratio UBX-13000995 - R06 Objective Specification Appendix Page 213 of 218...

  • Page 214: Related Documents

    LISA-U1 series Data Sheet, Docu No UBX-13002048 u-blox LISA-U2 series Data Sheet, Docu No UBX-13001734 u-blox LISA-C200 & FW75-C200 System Integration Manual, Docu No UBX-13000620 u-blox LISA-U series System Integration Manual, Docu No UBX-13001118 u-blox C200 AT Commands Manual, Docu No CDMA-2X-11002 ITU-T Recommendation V.24 - 02-2000 - List of definitions for interchange circuits between...
  • Page 215 IEC 60079-11 - Explosive atmospheres, Part 11: Equipment protection by intrinsic safety 'i' - 2011-06 [29] IEC 60079-26 - Explosive atmospheres, Part 26: Equipment with EPL Ga - 2006-08 Some of the above documents can be downloaded from u-blox web-site (http://www.u-blox.com). UBX-13000995 - R06 Objective Specification Related documents...

  • Page 216: Revision History

    Formatted Formatted Formatted SARA-G3 series - System Integration Manual Formatted Formatted Formatted Formatted Revision history Formatted Formatted Revision Date Name Status / Comments Formatted 30-Oct-2012 sses Initial Release Formatted 28-Mar-2013 sses Updated status to Advance Information Formatted Updated suggested paste mask...
  • Page 217 Formatted Formatted SARA-G3 series - System Integration Manual Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted Formatted...

  • Page 218: Contact

    SARA-G3 series - System Integration Manual Contact For complete contact information visit us at www.u-blox.com. u-blox Offices North, Central and South America Headquarters Asia, Australia, Pacific Europe, Middle East, Africa u-blox America, Inc. u-blox Singapore Pte. Ltd. u-blox AG Phone:...

This manual is also suitable for:

Sara-g310Sara-g350Sara-g350 atexSara-g300

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