u-blox LARA-R203 System Integration Manual
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u-blox LARA-R203 System Integration Manual

u-blox LARA-R203 System Integration Manual

Size-optimized lte cat 1 modules in single and multi-mode configurations
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LARA-R2 series
Size-optimized LTE Cat 1 modules
in single and multi-mode configurations
System Integration Manual
Abstract
This document describes the features and the system integration of
LARA-R2 series multi-mode cellular modules.
These modules are a complete, cost efficient and performance
optimized LTE Cat 1 / 3G / 2G multi-mode solution covering up to
4 LTE bands, up to 2 UMTS/HSPA bands and up to 2 GSM/EGPRS
bands in the very small and compact LARA form factor.
www.u-blox.com
UBX-16010573 - R12

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  • Page 1 LTE Cat 1 / 3G / 2G multi-mode solution covering up to 4 LTE bands, up to 2 UMTS/HSPA bands and up to 2 GSM/EGPRS bands in the very small and compact LARA form factor. www.u-blox.com UBX-16010573 - R12...
  • Page 2 The information contained herein is provided “as is” and u-blox assumes no liability for the use of the information. No warranty, either express or implied, is given, including but not limited, with respect to the accuracy, correctness, reliability and fitness for a particular purpose of the information.

  • Page 3: Preface

     Application Notes: These documents provide guidelines and information on specific hardware and/or software topics on u-blox cellular modules. See Related documents for a list of application notes related to your cellular module. How to use this Manual The LARA-R2 series System Integration Manual provides the necessary information to successfully design in and configure these u-blox cellular modules.

  • Page 4: Table Of Contents

    LARA-R2 series - System Integration Manual Contents Preface ..........................3 Contents ..........................4 System description ....................... 8 Overview .............................. 8 Architecture ............................11 Pin-out ............................... 12 Operating modes ..........................17 Supply interfaces ..........................19 1.5.1 Module supply input (VCC) ......................19 1.5.2 RTC supply input/output (V_BCKP) ....................
  • Page 5 2.13 ESD guidelines ..........................125 2.13.1 ESD immunity test overview ...................... 125 2.13.2 ESD immunity test of u-blox LARA-R2 series reference designs ..........125 2.13.3 ESD application circuits ......................126 2.14 Schematic for LARA-R2 series module integration ................128 2.15 Design-in checklist ..........................
  • Page 6 Declaration of Conformity ......................138 4.3.2 Modifications ..........................139 European Conformance CE mark ...................... 141 Product testing ......................142 u-blox in-series production test ......................142 Test parameters for OEM manufacturers ..................143 5.2.1 “Go/No go” tests for integrated devices ..................143 5.2.2 Functional tests providing RF operation ..................
  • Page 7 LARA-R2 series - System Integration Manual Contact ..........................157 UBX-16010573 - R12 Contents Page 7 of 157...

  • Page 8: System Description

    LARA-R280 is designed mainly for operation in Asia, Oceania and other countries, on the LTE and 3G networks LARA-R2 series modules are form-factor compatible with the u-blox SARA, LISA and TOBY cellular module families: this facilitates easy migration from u-blox GSM/GPRS, CDMA, UMTS/HSPA, and LTE high data rate modules, maximizes the investments of customers, simplifies logistics, and enables very short time-to-market.
  • Page 9 ● ● ● ● ● □ ● ● ● ● America 5,12 1900 North ● ● ● ● ● ● ● ● □ ● ● ● LARA-R203 2,4,12 ● America North □ □ □ □ ● □ ● ● □ ● ● ● LARA-R204 4,13 ●...
  • Page 10   Band 5 (850 MHz) Band 2 (1900 MHz)  Band 4 (1700 MHz)  Band 2 (1900 MHz)  LARA-R203:  Band 12 (700 MHz)  Band 4 (1700 MHz)  Band 2 (1900 MHz)  LARA-R204: ...

  • Page 11: Architecture

    LARA-R2 series - System Integration Manual 1.2 Architecture Figure 1 summarizes the internal architecture of the LARA-R2 series modules. ANT_DET Filters Duplexer 26 MHz LNAs Filters Filters Switch DDC(I ANT1 Filters SDIO Duplexer LNAs Filters UART Filters Memory transceiver Cellular Base-band Filters LNAs...

  • Page 12: Pin-Out

    LARA-R2 series - System Integration Manual Baseband and power management section The Baseband and Power Management section is composed of the following main elements:  A mixed signal ASIC, which integrates Microprocessor for control functions DSP core for cellular Layer 1 and digital processing of Rx and Tx signal paths Memory interface controller Dedicated peripheral blocks for control of the USB, SIM and generic digital interfaces Interfaces to RF transceiver ASIC...
  • Page 13 LARA-R2 series - System Integration Manual Function Pin Name Pin No Description Remarks System PWR_ON Power-on input Internal 10 k pull-up resistor to V_BCKP. See section 1.6.1 for functional description. See section 2.3.1 for external circuit design-in. RESET_N External reset Internal 10 k...
  • Page 14 USB_D- USB Data Line D- USB interface for AT commands, data communication, FOAT, FW update by u-blox EasyFlash tool and diagnostic. 90  nominal differential impedance (Z 30  nominal common mode impedance (Z Pull-up or pull-down resistors and external series resistors as required by the USB 2.0 specifications [9] are part of the USB...
  • Page 15 USB_D+ USB interface for AT commands, data communication, FOAT, USB Data Line D+ FW update by u-blox EasyFlash tool and diagnostic. 90  nominal differential impedance (Z 30  nominal common mode impedance (Z Pull-up or pull-down resistors and external series resistors as required by the USB 2.0 specifications [9] are part of the USB...
  • Page 16 Description Remarks SDIO_CMD SDIO command Not supported by “02” and “62” product versions. SDIO interface for communication with u-blox Wi-Fi module See section 1.9.5 for functional description. See section 2.6.5 for external circuit design-in. Audio I2S_TXD S transmit data / S transmit data output, alternatively configurable as GPIO.

  • Page 17: Operating Modes

    (see sections 1.5.1.5, the module is temporarily not ready to 1.9.1.4, 1.9.2.4 and to the u-blox AT Commands Manual [2], AT+UPSV communicate with an external device by means command).
  • Page 18 AT+UPSV command (see If power saving configuration is enabled by the AT+UPSV command, sections 1.5.1.4, 1.9.1.4 and to the u-blox AT the module automatically switches from active to idle mode whenever Commands Manual [2]). possible and the module wakes up from idle to active mode in the events listed above (see idle to active transition description).

  • Page 19: Supply Interfaces

    LARA-R2 series - System Integration Manual 1.5 Supply interfaces 1.5.1 Module supply input (VCC) The modules must be supplied via the three VCC pins that represent the module power supply input. The VCC pins are internally connected to the RF power amplifier and to the integrated Power Management Unit: all supply voltages needed by the module are generated from the VCC supply by integrated voltage regulators, including the V_BCKP Real Time Clock supply, V_INT digital interfaces supply and VSIM SIM card supply.
  • Page 20 LARA-R2 series - System Integration Manual 1.5.1.1 VCC supply requirements Table 6 summarizes the requirements for the VCC module supply. See section 2.2.1 for all the suggestions to properly design a VCC supply circuit compliant to the requirements listed in Table 6. VCC supply circuit affects the RF compliance of the device integrating LARA-R2 series modules with applicable required certification schemes as well as antenna circuit design.
  • Page 21 LARA-R2 series - System Integration Manual 1.5.1.2 VCC current consumption in 2G connected mode When a GSM call is established, the VCC consumption is determined by the current consumption profile typical of the GSM transmitting and receiving bursts. The current consumption peak during a transmission slot is strictly dependent on the transmitted power, which is regulated by the network.
  • Page 22 The multi-slot transmission power can be further reduced by configuring the actual Multi-Slot Power Reduction profile with the dedicated AT command, AT+UDCONF=40 (see the u-blox AT Commands Manual [2]). If the module transmits in GPRS class 12 in the 850 or 900 MHz bands, at the maximum RF power control level, the current consumption can reach a quite high peak but lower than the one achievable in 2G single-slot mode.
  • Page 23 LARA-R2 series - System Integration Manual 1.5.1.3 VCC current consumption in 3G connected mode During a 3G connection, the module can transmit and receive continuously due to the Frequency Division Duplex (FDD) mode of operation with the Wideband Code Division Multiple Access (WCDMA). The current consumption depends on output RF power, which is always regulated by the network (the current base station) sending power control commands to the module.
  • Page 24 LARA-R2 series - System Integration Manual 1.5.1.4 VCC current consumption in LTE connected mode During an LTE connection, the module can transmit and receive continuously due to the Frequency Division Duplex (FDD) mode of operation used in LTE radio access technology. The current consumption depends on output RF power, which is always regulated by the network (the current base station) sending power control commands to the module.
  • Page 25 The power saving configuration is disabled by default, but it can be enabled using the appropriate AT command (see u-blox AT Commands Manual [2], AT+UPSV command). When power saving is enabled, the module automatically enters low power idle mode whenever possible, reducing current consumption.
  • Page 26 Power saving configuration is disabled by default, or it can be disabled using the appropriate AT command (see the u-blox AT Commands Manual [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 27: Rtc Supply Input/Output (V_Bckp)

    LARA-R2 series - System Integration Manual 1.5.2 RTC supply input/output (V_BCKP) The V_BCKP pin of LARA-R2 series modules connects the supply for the Real Time Clock (RTC) and Power-On internal logic. This supply domain is internally generated by a linear LDO regulator integrated in the Power Management Unit, as described in Figure 11.

  • Page 28: Generic Digital Interfaces Supply Output (V_Int)

    LARA-R2 series - System Integration Manual 1.5.3 Generic digital interfaces supply output (V_INT) The V_INT output pin of the LARA-R2 series modules is connected to an internal 1.8 V supply with a current capability specified in the LARA-R2 series Data Sheet [1]. This supply is internally generated by a switching step- down regulator integrated in the Power Management Unit and it is internally used to source the generic digital I/O interfaces of the cellular module, as described in Figure 12.

  • Page 29: System Function Interfaces

    RESET_N pin from the low logic level  RTC alarm, i.e. pre-programmed alarm by AT+CALA command (see the u-blox AT Commands Manual [2]). As described in Figure 13, the LARA-R2 series PWR_ON input is equipped with an internal active pull-up resistor to the V_BCKP supply: the PWR_ON input voltage thresholds are different from the other generic digital interfaces.
  • Page 30 Figure 14: LARA-R2 series switch-on sequence description The greeting text can be activated by means of the +CSGT AT command (see u-blox AT Commands Manual [2]) to notify the external application that the module is ready to operate (i.e. ready to reply to AT commands) and the...

  • Page 31: Module Power-Off

    AT+CPWROFF command, waiting for the command response for an appropriate time period (see the u-blox AT Commands Manual [2]), and then a proper VCC supply must be held at least until the end of the modules’ internal switch-off sequence, which occurs when the generic digital interfaces supply output (V_INT) is switched off by the module.
  • Page 32 LARA-R2 series - System Integration Manual Figure 15 illustrates the LARA-R2 series modules switch-off sequence started by means of the AT+CPWROFF command, allowing storage of the current parameter settings in the module’s non-volatile memory and a proper network detach, with the following phases: ...
  • Page 33 LARA-R2 series - System Integration Manual Figure 16 illustrates the LARA-R2 series modules’ switch-off sequence started by means of the PWR_ON input pin, allowing storage of current parameter settings in the module’s non-volatile memory and a proper network detach, with the following phases: ...

  • Page 34: Module Reset

    AT commands fails or if the module does not provide a reply to a specific AT command after a time period longer than the one defined in the u-blox AT Commands Manual [2]. As described in Figure 17, the RESET_N input pins are equipped with an internal pull-up to the V_BCKP supply.

  • Page 35: Antenna Interface

    LARA-R2 series - System Integration Manual 1.7 Antenna interface 1.7.1 Antenna RF interfaces (ANT1 / ANT2) LARA-R2 series modules provide two RF interfaces for connecting the external antennas:  The ANT1 represents the primary RF input/output for transmission and reception of LTE/3G/2G RF signals. The ANT1 pin has a nominal characteristic impedance of 50 ...
  • Page 36 LARA-R2 series - System Integration Manual Item Requirements Remarks Impedance 50  nominal characteristic impedance The impedance of the antenna RF connection must match the 50  impedance of the ANT2 port. Frequency Range See the LARA-R2 series Data Sheet [1] The required frequency range of the antennas connected to the ANT2 port depends on the operating bands of the used cellular module and the used mobile network.

  • Page 37: Antenna Detection Interface (Ant_Det)

    Unsolicited Result Code (URC) is generated each time that there is a change of status (for more details, see the u-blox AT Commands Manual [2], +UGPIOC, +CIND, +CMER). The optional function “SIM card hot insertion/removal” can be additionally configured on the GPIO5 pin by the specific AT command (see the u-blox AT Commands Manual [2], +UDCONF=50), in order to enable / disable the SIM interface upon detection of the external SIM card physical insertion / removal.

  • Page 38: Data Communication Interfaces

    LARA-R2 series modules’ UART interface is configured by default in AT command mode: the module waits for AT command instructions and interprets all the characters received as commands to execute. See the u-blox AT Commands Manual [2] for the definition of the command mode, data mode, and online command mode. UBX-16010573 - R12...
  • Page 39 Baud rates higher than 460,800 bit/s cannot be automatically detected by LARA-R2 series modules. The modules support one-shot automatic frame recognition in conjunction with one-shot autobauding. The following frame formats can be configured by an AT command (see the u-blox AT Commands Manual [2], +ICF): ...
  • Page 40 OFF state if the line is not activated by the DTE: an active pull-up is enabled inside the module on the TXD input. See the u-blox AT Commands Manual [2] for the definition of the command mode, data mode, and online command mode Not supported by LARA-R204-02B and LARA-R211-02B-00 product versions.
  • Page 41 If AT&S0 is set, the DSR module output line is set by default to the ON state (low level) at UART initialization and is then always held in the ON state. See the u-blox AT Commands Manual [2] for the definition of the command mode, data mode, and online command mode UBX-16010573 - R12...
  • Page 42 If AT&C0 is set, the DCD module output line is set by default to the ON state (low level) at UART initialization and is then always held in the ON state. See the u-blox AT Commands Manual [2] for the definition of the command mode, data mode, and online command mode UBX-16010573 - R12...
  • Page 43 The RI line can additionally notify all the URCs and all the incoming data in PPP and Direct Link connections, if the feature is enabled by the AT+URING command (for more details, see the u-blox AT Commands Manual [2]): the RI line is asserted when one of the configured events occur and it remains asserted for 1 s unless another configured event will happen, with the same behavior described in Figure 20.
  • Page 44 The power saving configuration is controlled by the AT+UPSV command (for the complete description, see the 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 the definition and description of module operating modes referred to in this section).
  • Page 45 LARA-R2 series - System Integration Manual AT+UPSV HW flow control RTS line DTR line Communication during idle mode and wake up Enabled (AT&K3) Data sent by the DTE is correctly received by the module. Data sent by the module is correctly received by the DTE. Enabled (AT&K3) Data sent by the DTE is lost by the module.
  • Page 46 DTE over the UART. When the AT+UPSV=3 configuration is enabled, the DTR input line can still be used by the DTE to control the module behavior according to the AT&D command configuration (see the u-blox AT commands Manual [2]). UBX-16010573 - R12...
  • Page 47 LARA-R2 series - System Integration Manual Wake-up via data reception The UART wake-up via data reception consists of a special configuration of the module TXD input line that causes the system wake-up when a low-to-high transition occurs on the TXD input line. In particular, the UART is enabled and the module switches from the low power idle mode to active mode within ~20 ms from the first character received: this is the system “wake-up time”.
  • Page 48 Channel 6: GNSS data tunneling GNSS data tunneling is not supported by LARA-R204-02B and LARA-R211-02B-00 product versions. See the u-blox AT Commands Manual [2] for the definition of the command mode, data mode, and online command mode. UBX-16010573 - R12...

  • Page 49: Usb Interface

    PID are the following:  VID = 0x8087  PID = 0x0716 See the u-blox AT Commands Manual [2] for the definition of the command mode, data mode, and online command mode. UBX-16010573 - R12 System description Page 49 of 157...
  • Page 50 LARA-R2 series - System Integration Manual This VID and PID combination identifies a USB profile where no USB function described above is available: AT commands must not be sent to the module over the USB profile identified by this VID and PID combination. Then, after a time period (which depends on the host / device enumeration timings), the VID and PID are updated to the ones related to the default USB profile providing the following set of USB functions: ...
  • Page 51 Windows Embedded Compact 2013  Windows 10 IoT The module firmware can be upgraded over the USB interface by means of the FOAT feature, or using the u-blox EasyFlash tool (for more details, see the Firmware Update Application Note [23]. 1.9.2.3...

  • Page 52: Hsic Interface

     u-blox AT commands (for the complete list and syntax, see the u-blox AT Commands Manual [2]) See the u-blox AT Commands Manual [2] for the definition of the command mode, data mode, and online command mode. UBX-16010573 - R12...

  • Page 53: Ddc (I C) Interface

    I C bus specifications [11]. u-blox has implemented special features to ease the design effort required for the integration of a u-blox cellular module with a u-blox GNSS receiver. Combining a u-blox cellular module with a u-blox GNSS receiver allows designers to have full access to the...

  • Page 54: Sdio 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 55: Audio Interface

    I2S_CLK clock input/output, I2S_WA world alignment / synchronization signal input/output), which can be configured by AT commands for digital audio communication with external digital audio devices as an audio codec (for more details, see the u-blox AT Commands Manual [2], +UI2S AT command). The I S interface can be alternatively set in different modes by the <I2S_mode>...

  • Page 56: Clock Output

    LARA-R2 series modules include 9 pins (GPIO1-GPIO5, I2S_TXD, I2S_RXD, I2S_CLK, I2S_WA) which can be configured as General Purpose Input/Output or to provide custom functions via u-blox AT commands (for more details, see the u-blox AT Commands Manual [2], +UGPIOC, +UGPIOR, +UGPIOW AT commands), as summarized in Table 12.

  • Page 57: System Features

    (i.e. configuring the module in “airplane mode” by means of the +CFUN AT command) in order to reduce power consumption and monitoring the environment at constant periods (for more details, see the u-blox AT Commands Manual [2], +UCD AT command). UBX-16010573 - R12...

  • Page 58: Dual Stack Ipv4/Ipv6

    TCP or UDP socket via serial interfaces. In Direct Link mode, data sent to the serial interface from an external application processor is forwarded to the network and vice-versa. For more details about embedded TCP/IP and UDP/IP functionalities, see the u-blox AT Commands Manual [2] 1.14.7 FTP LARA-R2 series provide embedded File Transfer Protocol (FTP) services.

  • Page 59: Ssl/Tls

    Table 13 contains the settings of the default SSL/TLS profile and Table 14 to Table 18 report the main SSL/TLS supported capabilities of the products. For a complete list of supported configurations and settings, see the u-blox AT Commands Manual [2].

  • Page 60: Bearer Independent Protocol

    SIM uses either an already active PDP context or a new PDP context established with the APN provided by the SIM card. For more details, see the u-blox AT Commands Manual [2]. 1.14.11 AssistNow clients and GNSS integration AssistNow clients and u-blox GNSS receiver integration are not supported by the LARA-R204-02B and LARA-R211-02B-00 product versions.

  • Page 61: Hybrid Positioning And Celllocate

    ® visible to the specific device. To estimate its position, the u-blox cellular module sends the CellLocate server the parameters of network cells visible to it using a UDP connection. In return, the server provides the estimated ®...
  • Page 62 LARA-R2 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 63: Wi-Fi Integration

    Full access to u-blox short range communication Wi-Fi modules is available through a dedicated SDIO interface (see sections 1.9.5 and 2.6.5). This means that combining a LARA-R2 series cellular module with a u-blox short range communication module gives designers full access to the Wi-Fi module directly via the cellular module, so that a second interface connected to the Wi-Fi module is not necessary.

  • Page 64: Firmware Update Over The Air (Fota)

    Smart Temperature Supervisor (STS) The Smart Temperature Supervisor is activated and configured by a dedicated AT+USTS command. See the u-blox AT Commands Manual [2] for more details. An URC indication is provided once the feature is enabled and at the module power-on.
  • Page 65 LARA-R2 series - System Integration Manual  Outside the valid temperature range, (Ti < t ) or (Ti > t ), the device is working outside the specified range and represents a dangerous working condition. This condition is indicated and the device shuts down to avoid damage.

  • Page 66: Power Saving

    The connected USB host forces a remote wake-up of the module as USB device (see 1.9.2.4)  The connected u-blox GNSS receiver forces a wake-up of the cellular module using the GNSS Tx data ready function over GPIO3 (see 1.9.4) ...

  • Page 67: Design-In

    Accurate design is required to guarantee proper functionality. Follow the suggestions provided in sections 2.2.2 and 2.2.3 for schematic and layout design. It is recommended to follow the specific design guidelines provided by each manufacturer of any external part selected for the application board integrating the u-blox cellular modules. UBX-16010573 - R12 Design-in...

  • Page 68: Supply Interfaces

    LARA-R2 series - System Integration Manual 2.2 Supply interfaces 2.2.1 Module supply (VCC) 2.2.1.1 General guidelines for VCC supply circuit selection and design All of the available VCC pins must be connected to the external supply minimizing the power loss due to series resistance.
  • Page 69 LARA-R2 series - System Integration Manual charging source (e.g. ~12 V) and a rechargeable back-up battery (e.g. 3.7 V Li-Pol) are available at the same time as a possible supply source, then a proper charger / regulator with integrated power path management function can be selected to supply the module while simultaneously and independently charging the battery.
  • Page 70 LARA-R2 series - System Integration Manual Figure 28 and the components listed in Table 20 show an example of a high reliability power supply circuit, where the VCC module is supplied by a step-down switching regulator capable of delivering the specified maximum peak / pulse current to the VCC pins, with low output ripple and with fixed switching frequency in PWM mode operation greater than 1 MHz.
  • Page 71 LARA-R2 series - System Integration Manual Figure 29 and the components listed in Table 21 show an example of a low cost power supply circuit, where the VCC module supply is provided by a step-down switching regulator capable of delivering the specified maximum peak / pulse current to the VCC pins, transforming a 12 V supply input.
  • Page 72 LARA-R2 series - System Integration Manual 2.2.1.3 Guidelines for VCC supply circuit design using a Low Drop-Out (LDO) linear regulator The use of a linear regulator is suggested when the difference from the available supply rail and the VCC value is low: linear regulators provide high efficiency when transforming a 5 V supply to a voltage value within the module VCC normal operating range.
  • Page 73 LARA-R2 series - System Integration Manual Figure 31 and the components listed in Table 23 show an example of a low cost power supply circuit, where the VCC module supply is provided by an LDO linear regulator capable of delivering the specified highest peak / pulse current, with the proper power handling capability.
  • Page 74 LARA-R2 series - System Integration Manual 2.2.1.4 Guidelines for VCC supply circuit design using a rechargeable Li-Ion or Li-Pol battery Rechargeable Li-Ion or Li-Pol batteries connected to the VCC pins should meet the following prerequisites to comply with the module VCC requirements summarized in Table 6: ...
  • Page 75 LARA-R2 series - System Integration Manual 2.2.1.6 Additional guidelines for VCC supply circuit design To reduce voltage drops, use a low impedance power source. The series resistance of the power supply lines (connected to the VCC and GND pins of the module) on the application board and battery pack should also be considered and minimized: cabling and routing must be as short as possible to minimize power losses.
  • Page 76 LARA-R2 series - System Integration Manual 2.2.1.7 Additional guidelines for VCC supply circuit design of LARA-R211 modules LARA-R211 modules provide separate supply inputs over the VCC pins (see Figure 3):  VCC pins #52 and #53 represent the supply input for the internal RF power amplifier, demanding most of the total current drawn of the module when RF transmission is enabled during a voice/data call ...
  • Page 77 LARA-R2 series - System Integration Manual 2.2.1.8 Guidelines for external battery charging circuit LARA-R2 series modules do not have an on-board charging circuit. Figure 34 provides an example of a battery charger design, suitable for applications that are battery powered with a Li-Ion (or Li-Polymer) cell. In the application circuit, a rechargeable Li-Ion (or Li-Polymer) battery cell, that features proper pulse and DC discharge current capabilities and proper DC series resistance, is directly connected to the VCC supply input of the module.
  • Page 78 LARA-R2 series - System Integration Manual 2.2.1.9 Guidelines for external battery charging and power path management circuit Application devices where both a permanent primary supply / charging source (e.g. ~12 V) and a rechargeable back-up battery (e.g. 3.7 V Li-Pol) are available at the same time as the possible supply source should implement a suitable charger / regulator with an integrated power path management function to supply the module and the whole device while simultaneously and independently charging the battery.
  • Page 79 LARA-R2 series - System Integration Manual Battery charging is managed in three phases:  Pre-charge constant current (active when the battery is deeply discharged): the battery is charged with a low current, set to 10% of the fast-charge current  Fast-charge constant current: the battery is charged with the maximum current, configured by the value of an external resistor to a value suitable for the application ...
  • Page 80 AT+CPWROFF command, waiting the command response for a proper time period (see the u-blox AT Commands Manual [2]), and then a proper VCC supply must be held at least until the end of the modules’ internal power-off sequence, which occurs when the generic digital interfaces supply output (V_INT) is switched off by the module.
  • Page 81 LARA-R2 series - System Integration Manual 2.2.1.11 Guidelines for VCC supply layout design Good connection of the module VCC pins with a DC supply source is required for correct RF performance. Guidelines are summarized in the following list:  All the available VCC pins must be connected to the DC source. ...

  • Page 82: Rtc Supply (V_Bckp)

    LARA-R2 series - System Integration Manual 2.2.2 RTC supply (V_BCKP) 2.2.2.1 Guidelines for V_BCKP circuit design LARA-R2 series modules provide the V_BCKP RTC supply input/output, which can be mainly used to:  Provide RTC back-up when VCC supply is removed If RTC timing is required to run for a time interval of T [s] when VCC supply is removed, place a capacitor with a nominal capacitance of C [µF] at the V_BCKP pin.
  • Page 83 RAM when the VCC supply of the cellular 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 duration of the positioning VCC outage) and to maintain the configuration settings saved in the backup RAM.

  • Page 84: Interface Supply (V_Int)

    C) interface signals (see section 2.6.4 for more details)  Supply a 1.8 V u-blox 6 or subsequent GNSS receiver (see section 2.6.4 for more details)  Supply an external device as an external 1.8 V audio codec (see section 2.7.1 for more details) The V_INT supply output pin provides internal short circuit protection to limit the start-up current and protect the device in short circuit situations.

  • Page 85: System Functions Interfaces

    LARA-R2 series - System Integration Manual 2.3 System functions interfaces 2.3.1 Module power-on (PWR_ON) 2.3.1.1 Guidelines for PWR_ON circuit design LARA-R2 series modules’ PWR_ON input is equipped with an internal active pull-up resistor to the VCC module supply as described in Figure 39: an external pull-up resistor is not required and should not be provided. If connecting the PWR_ON input to a push button, the pin will be externally accessible on the application device.

  • Page 86: Module Reset (Reset_N)

    LARA-R2 series - System Integration Manual 2.3.2 Module reset (RESET_N) 2.3.2.1 Guidelines for RESET_N circuit design LARA-R2 series RESET_N is equipped with an internal pull-up to the V_BCKP supply as described in Figure 40. An external pull-up resistor is not required. If connecting the RESET_N input to a push button, the pin will be externally accessible on the application device.

  • Page 87: Module / Host Configuration Selection

    LARA-R2 series - System Integration Manual 2.3.3 Module / host configuration selection 2.3.3.1 Guidelines for HOST_SELECT circuit design The functionality of the HOST_SELECT pin is not supported by the “02” and “62” product versions. LARA-R2 series modules include one pin (HOST_SELECT) to select the module / host application processor configuration: the pin is available to select, enable, connect, disconnect and subsequently re-connect the HSIC (USB High-Speed Inter-Chip) interface.

  • Page 88: Antenna Interface

    LARA-R2 series - System Integration Manual 2.4 Antenna interface LARA-R2 series modules provide two RF interfaces for connecting the external antennas:  The ANT1 pin represents the primary RF input/output for LTE/3G/2G RF signals transmission and reception.  The ANT2 pin represents the secondary RF input for LTE/3G Rx diversity RF signals reception. Both the ANT1 and the ANT2 pins have a nominal characteristic impedance of 50 ...
  • Page 89 LARA-R2 series - System Integration Manual Radiation performance depends on the whole PCB and antenna system design, including product mechanical design and usage. Antennas should be selected with optimal radiating performance in the operating bands according to the mechanical specifications of the PCB and the whole product. It is recommended to select a pair of custom antennas designed by an antennas’...
  • Page 90 LARA-R2 series - System Integration Manual Guidelines for RF transmission line design Any RF transmission line, such as the ones from the ANT1 and ANT2 pads up to the related antenna connector or up to the related internal antenna pad, must be designed so that the characteristic impedance is as close as possible to 50 .
  • Page 91 LARA-R2 series - System Integration Manual  the dielectric constant of the dielectric material (e.g. dielectric constant of the FR-4 dielectric material in Figure 42 and Figure 43)  the gap from the transmission line to the adjacent ground plane on the same layer of the transmission line (e.g.
  • Page 92 LARA-R2 series - System Integration Manual Guidelines for RF termination design RF terminations must provide a characteristic impedance of 50  as well as the RF transmission lines up to the RF terminations themselves, to match the characteristic impedance of the ANT1 / ANT2 ports of the modules. However, real antennas do not have a perfect 50 ...
  • Page 93 LARA-R2 series - System Integration Manual Examples of antennas Table 32 lists some examples of possible internal on-board surface-mount antennas. Manufacturer Part Number Product Name Description Taoglas PA.710.A Warrior GSM / WCDMA / LTE SMD Antenna 698..960 MHz, 1710..2170 MHz, 2300..2400 MHz, 2490..2690 MHz 40.0 x 6.0 x 5.0 mm Taoglas PA.711.A...
  • Page 94 LARA-R2 series - System Integration Manual Table 34 lists some examples of possible external antennas. Manufacturer Part Number Product Name Description Taoglas GSA.8827.A.101111 Phoenix GSM / WCDMA / LTE adhesive-mount antenna with cable and SMA(M) 698..960 MHz, 1575.42 MHz, 1710..2170 MHz, 2490..2690 MHz 105 x 30 x 7.7 mm Taoglas TG.30.8112...

  • Page 95: Antenna Detection Interface (Ant_Det)

    LARA-R2 series - System Integration Manual 2.4.2 Antenna detection interface (ANT_DET) 2.4.2.1 Guidelines for ANT_DET circuit design Figure 45 and Table 35 describe the recommended schematic / components for the antennas detection circuit that must be provided on the application board and for the diagnostic circuit that must be provided on the antennas’ assembly to achieve primary and secondary antenna detection functionality.
  • Page 96  Values close to the measurement range maximum limit (approximately 50 k) or an open-circuit “over range” report (see the u-blox AT Commands Manual [2]) means that that the antenna is not connected or the RF cable is broken. ...

  • Page 97: Sim Interface

    LARA-R2 series - System Integration Manual 2.5 SIM interface 2.5.1.1 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, electrical and functional characteristics of Universal Integrated Circuit Cards (UICC) which contains the Subscriber Identification Module (SIM) integrated circuit that securely stores all the information needed to identify and authenticate subscribers over the cellular network.
  • Page 98 LARA-R2 series - System Integration Manual Guidelines for single SIM card connection without detection A removable SIM card placed in a SIM card holder must be connected to the SIM card interface of LARA-R2 series modules as described in Figure 46, where the optional SIM detection feature is not implemented. Follow these guidelines connecting the module to a SIM connector without SIM presence detection: ...
  • Page 99 LARA-R2 series - System Integration Manual Guidelines for single SIM chip connection A solderable SIM chip (M2M UICC Form Factor) must be connected the SIM card interface of LARA-R2 series modules as described in Figure 47. Follow these guidelines, connecting the module to a solderable SIM chip without SIM presence detection: ...
  • Page 100 LARA-R2 series - System Integration Manual Guidelines for single SIM card connection with detection A removable SIM card placed in a SIM card holder must be connected to the SIM card interface of LARA-R2 series modules as described in Figure 48, where the optional SIM card detection feature is implemented. Follow these guidelines connecting the module to a SIM connector implementing SIM presence detection: ...
  • Page 101 SIM card physical insertion / removal: if the feature is enabled using the specific AT commands (see sections 1.8.2 and 1.12, and the u-blox AT Commands Manual [2], +UGPIOC, +UDCONF=50 commands), the switch from the first SIM to the second SIM can be properly done when a Low logic level is present on the GPIO5 pin (“SIM not inserted”...
  • Page 102 LARA-R2 series - System Integration Manual FIRST SIM CARD LARA-R2 series VPP (C6) 4PDT VCC (C1) Analog IO (C7) Switch CLK (C3) 1VSIM VSIM VSIM 2VSIM RST (C2) 1DAT SIM_IO GND (C5) 2DAT C2 C3 D1 D2 D3 D4 1CLK SIM_CLK 2CLK SECOND...

  • Page 103: Data Communication Interfaces

    LARA-R2 series - System Integration Manual 2.6 Data communication interfaces 2.6.1 UART interface 2.6.1.1 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 can be used to provide full RS-232 (9 lines) functionality: e.g.
  • Page 104 LARA-R2 series - System Integration Manual Providing the TXD, RXD, RTS, CTS and DTR lines only (not using the complete V.24 link) If the functionality of the DSR, DCD and RI lines is not required, or the lines are not available: ...
  • Page 105 Connect the module DTR input to GND using a 0  series resistor, since it may be useful to set DTR active if not specifically handled (see the u-blox AT Commands Manual [2], &D, S0, +CSGT, +CNMI AT commands) ...
  • Page 106 Connect the module DTR input to GND using a 0  series resistor, since it may be useful to set DTR active if not specifically handled (see the u-blox AT Commands Manual [2], &D, S0, +CSGT, +CNMI AT commands) ...
  • Page 107 LARA-R2 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 SN74AVC2T245 - Texas Instruments Table 43: Component for UART application circuit with partial V.24 link (3-wire) in DTE/DCE serial communication (3.0 V DTE) Additional considerations If a 3.0 V Application Processor (DTE) is used, the voltage scaling from any 3.0 V output of the DTE to the apposite 1.8 V input of the module (DCE) can be implemented, as an alternative low-cost solution, by means of an...

  • Page 108: Usb Interface

    LARA-R2 series - System Integration Manual 2.6.2 USB interface 2.6.2.1 Guidelines for USB circuit design The USB_D+ and USB_D- lines carry the USB serial data and signaling. The lines are used in single-ended mode for full speed signaling handshake, as well as in differential mode for high speed signaling and data transfer. USB pull-up or pull-down resistors and external series resistors on USB_D+ and USB_D- lines as required by the USB 2.0 specification [9] are part of the module USB pins driver and do not need to be externally provided.
  • Page 109 LARA-R2 series - System Integration Manual 2.6.2.2 Guidelines for USB layout design The USB_D+ / USB_D- lines require accurate layout design to achieve reliable signaling at the high speed data rate (up to 480 Mb/s) supported by the USB serial interface. The characteristic impedance of the USB_D+ / USB_D- lines is specified by the Universal Serial Bus Revision 2.0 specification [9].

  • Page 110: Hsic Interface

    LARA-R2 series - System Integration Manual 2.6.3 HSIC interface 2.6.3.1 Guidelines for HSIC circuit design The HSIC interface is not supported by the “02” and “62” product versions except for diagnostic purposes. LARA-R2 series modules include a USB High-Speed Inter-Chip compliant interface with a maximum 480 Mb/s data rate according to the High-Speed Inter-Chip USB Electrical Specification Version 1.0 [10] and USB Specification Revision 2.0 [9].
  • Page 111 LARA-R2 series - System Integration Manual 2.6.3.2 Guidelines for HSIC layout design HSIC lines require accurate layout design to achieve reliable signaling at high speed data rates (up to 480 Mb/s), as supported by the HSIC serial interface: signal integrity may be degraded if the PCB layout is not optimal, especially when the HSIC lines are very long.

  • Page 112: Ddc (I C) Interface

    C-bus slaves as an audio codec. Beside the general considerations explained below, see:  the following parts of this section for specific guidelines for the connection to u-blox GNSS receivers.  section 2.7.1 for an application circuit example with an external audio codec I C-bus slave.
  • Page 113 Figure 62 shows an application circuit for connecting the cellular module to a u-blox 1.8 V GNSS receiver:  The SDA and SCL pins of the cellular module are directly connected to the related pins of the u-blox 1.8 V GNSS receiver, with appropriate pull-up resistors connected to the 1.8 V GNSS supply enabled after the V_INT supply of the I C pins of the cellular module.
  • Page 114 Figure 63 illustrates an alternative solution as a supply for u-blox 1.8 V GNSS receivers: the V_INT 1.8 V regulated supply output of the cellular module can be used to supply a u-blox 1.8 V GNSS receiver of the u-blox 6 generation (or any newer u-blox GNSS receiver generation) instead of using an external voltage regulator as shown in the previous Figure 62.
  • Page 115 V supply can be ramped up before the V_INT 1.8 V cellular supply), with proper pull-up resistors.  The GPIO2 is connected to the active-high enable pin of the voltage regulator that supplies the u-blox 3.0 V GNSS receiver providing the “GNSS supply enable” function. A pull-down resistor is provided to avoid a switch- on of the positioning receiver when the cellular module is switched off or in the reset state.

  • Page 116: Sdio Interface

    SDIO_D3, SDIO_CLK, SDIO_CMD) designed to communicate with an external u-blox short range Wi-Fi module. Combining a u-blox cellular module with a u-blox short range communication module gives designers full access to the Wi-Fi module directly via the cellular module, so that a second interface connected to the Wi-Fi module is not necessary.

  • Page 117: Audio Interface

    For the appropriate selection of a compliant external digital audio device, see section 1.10.1 and see the +UI2S AT command description in the u-blox AT Commands Manual [2] for further details regarding the capabilities and the possible settings of I S digital audio interface of LARA-R2 series modules.
  • Page 118 Specific AT commands are available to configure the Maxim MAX9860 audio codec: for more details, see the u-blox AT Commands Manual [2], +UEXTDCONF AT command. As various external audio codecs other than the one described in Figure 65 and Table 48 can be used to provide voice capability, the appropriate specific application circuit must be implemented and configured according to the particular external digital audio device or audio codec used and according to the application requirements.
  • Page 119 LARA-R2 series - System Integration Manual Reference Description Part Number – Manufacturer 100 nF Capacitor Ceramic X5R 0402 10% 10V GRM155R71C104KA01 – Murata C2, C4, C5, C6 1 µF Capacitor Ceramic X5R 0402 10% 6.3 V GRM155R60J105KE19 – Murata 10 µF Capacitor Ceramic X5R 0603 20% 6.3 V GRM188R60J106ME47 –...
  • Page 120 LARA-R2 series - System Integration Manual  Keep ground separation from microphone lines to other noisy signals. Use an intermediate ground layer or vias wall for coplanar signals.  For an external audio device providing differential microphone input, route the microphone signal lines as a differential pair embedded in ground to reduce differential noise pick-up.

  • Page 121: General Purpose Input/Output (Gpio)

    LARA-R2 series - System Integration Manual 2.8 General Purpose Input/Output (GPIO) 2.8.1.1 Guidelines for GPIO circuit design A typical usage of LARA-R2 series modules’ GPIOs can be the following:  Network indication provided over GPIO1 pin (see Figure 66 / Table 49 below) ...

  • Page 122: Reserved Pins (Rsvd)

    LARA-R2 series - System Integration Manual 2.9 Reserved pins (RSVD) LARA-R2 series modules have pins reserved for future use, marked as RSVD. All the RSVD pins are to be left unconnected on the application board except the following RSVD pin, as described in Figure 67: ...

  • Page 123: Module Footprint And Paste Mask

    LARA-R2 series - System Integration Manual 2.11 Module footprint and paste mask Figure 68 and Table 50 describe the suggested footprint (i.e. copper mask) and paste mask layout for LARA modules: the proposed land pattern layout reflects the modules’ pins layout, while the proposed stencil apertures layout is slightly different (see the F’’, H’’, I’’, J’’, O’’...

  • Page 124: Thermal Guidelines

    LARA-R2 series - System Integration Manual 2.12 Thermal guidelines Modules’ operating temperature range is specified in the LARA-R2 series Data Sheet [1]. The most critical condition concerning module thermal performance is the uplink transmission at maximum power (data upload in connected mode), when the baseband processor runs at full speed, radio circuits are all active and the RF power amplifier is driven to higher output RF power.

  • Page 125: Esd Guidelines

    LARA-R2 series modules reference design according to the European Norms summarized in Table 51. The EMC / ESD approved u-blox reference designs consist of a LARA-R2 series module installed onto a motherboard which provides the supply interface, SIM card and communication port. External LTE/3G/2G antennas are connected to the provided connectors.

  • Page 126: Esd Application Circuits

    LARA-R2 series - System Integration Manual Table 52 summarizes the u-blox LARA-R2 series reference designs ESD immunity test results, according to the CENELEC EN 61000-4-2 [18], ETSI EN 301 489-1 [19], 301 489-52 [20] test requirements. Category Application Immunity Level...
  • Page 127 LARA-R2 series - System Integration Manual RESET_N pin The following precautions are suggested for the RESET_N line of LARA-R2 series modules, depending on the application board handling, to satisfy ESD immunity test requirements:  It is recommended to keep the connection line to RESET_N as short as possible Maximum ESD sensitivity rating of the RESET_N pin is 1 kV (Human Body Model according to JESD22-A114).

  • Page 128: Schematic For Lara-R2 Series Module Integration

    GND (C5) 47pF 47pF 47pF 47pF 100nF 470k ESD ESD ESD ESD ESD ESD 1.8V DTE 0Ω Not supported by LARA-R204-02B and LARA-R211-02B product version u-blox GNSS 0Ω 3.0 V receiver LDO Regulator 100nF 0Ω GPIO2 SHDNn TCA9406DCUR V_INT I2C Voltage Translator 0Ω...

  • Page 129: Design-In Checklist

    LARA-R2 series - System Integration Manual 2.15 Design-in checklist This section provides a design-in checklist. 2.15.1 Schematic checklist The following are the most important points for a simple schematic check:  DC supply must provide a nominal voltage at the VCC pin within the operating range limits. ...

  • Page 130: Layout Checklist

    LARA-R2 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 ANT1 and the ANT2 ports (antenna RF interfaces). ...

  • Page 131: Handling And Soldering

    3.1 Packaging, shipping, storage and moisture preconditioning For information pertaining to LARA-R2 series reels / tapes, Moisture Sensitivity levels (MSD), shipment and storage information, as well as drying for preconditioning, see the LARA-R2 series Data Sheet [1] and the u-blox Package Information Guide [25].

  • Page 132: Soldering

    LARA-R2 series - System Integration Manual 3.3 Soldering 3.3.1 Soldering paste Use of "No Clean" soldering paste is strongly recommended, as it does not require cleaning after the soldering process has taken place. The paste listed in the example below meets these criteria. Soldering Paste: OM338 SAC405 / Nr.143714 (Cookson Electronics) Alloy specification:...

  • Page 133: Optical Inspection

    LARA-R2 series - System Integration Manual To avoid falling off, modules should be placed on the topside of the motherboard during soldering. The soldering temperature profile chosen at the factory depends on additional external factors, such as the choice of soldering paste, size, thickness and properties of the base board, etc. Exceeding the maximum soldering temperature and the maximum liquidus time limit in the recommended soldering profile may permanently damage the module.

  • Page 134: Repeated Reflow Soldering

    EMI covers is done at the customer's own risk. The numerous ground pins should be sufficient to provide optimum immunity to interferences and noise. u-blox gives no warranty for damages to the LARA-R2 series modules caused by soldering metal cables or any other forms of metal strips directly onto the EMI covers.

  • Page 135: Approvals

    Check the appropriate applicability of the LARA-R2 series module’s approvals while starting the certification process of the device integrating the module: the re-use of the u-blox cellular module’s approval can significantly reduce the cost and time to market of the application device certification.

  • Page 136: Federal Communications Commission Notice

    LARA-R2 series - System Integration Manual 4.2 US Federal Communications Commission notice United States Federal Communications Commission (FCC) IDs:  u-blox LARA-R202 cellular modules: XPY1EIQ24NN  u-blox LARA-R203 cellular modules: XPY1DIQN3NN  u-blox LARA-R204 cellular modules: XPY1EIQN2NN 4.2.1 Safety warnings review the structure ...

  • Page 137: Modifications

    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 the LARA-R2 series modules are authorized to use the FCC Grants of the LARA-R2 series modules for their own final products according to the conditions referenced in the certificates.

  • Page 138: Innovation, Science And Economic Development Canada Notice

    Innovation, Science and Economic Development Canada notice ISED Canada (formerly known as IC - Industry Canada) Certification Numbers:  u-blox LARA-R202 cellular modules: 8595A-1EIQ24NN  u-blox LARA-R203 cellular modules: 8595A-1DIQN3NN  u-blox LARA-R204 cellular modules: 8595A-1EIQN2NN 4.3.1 Declaration of Conformity This device complies with the ISED Canada licence-exempt RSS standard(s).

  • Page 139: Modifications

    Radio Frequency (RF) Exposure Information The radiated output power of the u-blox Cellular Module is below the Innovation, Science and Economic Development Canada (ISED) radio frequency exposure limits. The u-blox Cellular Module should be used in such a manner such that the potential for human contact during normal operation is minimized.
  • Page 140 Informations concernant l'exposition aux fréquences radio (RF) La puissance de sortie émise par l’appareil de sans fil u-blox Cellular Module est inférieure à la limite d'exposition aux fréquences radio d'Innovation, Sciences et Développement économique Canada (ISDE). Utilisez l’appareil de sans fil u-blox Cellular Module de façon à minimiser les contacts humains lors du fonctionnement normal.

  • Page 141: European Conformance Ce Mark

    LARA-R2 series - System Integration Manual 4.4 European Conformance CE mark LARA-R211 modules have been evaluated against the essential requirements of the Radio Equipment Directive 2014/53/EU. In order to satisfy the essential requirements of the 2014/53/EU RED, the modules are compliant with the following standards: ...

  • Page 142: 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 automatically in the production line. A stringent quality control process has been implemented in the production line. Defective units are analyzed in detail to improve production quality.

  • Page 143: Test Parameters For Oem Manufacturers

    This test should be performed after data connection has been established. AT+CSQ is the typical AT command used to check signal quality in term of RSSI. See the u-blox AT Commands Manual [2] for details of the AT command.
  • Page 144 The use of this feature is intended for testing purposes in controlled environments by qualified users and must not be used during normal module operation. Follow the instructions suggested in u-blox documentation. u-blox assumes no responsibilities for the inappropriate use of this feature.

  • Page 145: Appendix

    A Migration between SARA-U2 and LARA-R2 A.1 Overview Migrating between u-blox SARA-U2 series 3G / 2G cellular modules and LARA-R2 series LTE Cat 1 / 3G / 2G cellular modules is a straightforward procedure that allows customers to take maximum advantage of their hardware and software investments.
  • Page 146 LARA-R2 series - System Integration Manual SARA and LARA modules are also form-factor compatible with the u-blox LISA and TOBY cellular module families: although SARA, LARA, LISA (33.2 x 22.4 mm, 76-pin LCC) and TOBY (35.6 x 24.8 mm, 152-pin LGA) modules each have different form factors, the footprints of all the SARA, LARA, LISA and TOBY modules have been developed to ensure layout compatibility.
  • Page 147 ● ● ● ● ● ■ ● ● ● ● ■ ■ ● ● ● ● ● ● ■ 5,12 LARA-R203 2,4,12 ● ● ● ● ● ● ● ■ ● ● ● ● ■ ■ ● ● ● ●...
  • Page 148 1990 LARA-R202 1700 1750 1800 1850 1900 1950 2000 2050 2100 2150 2200 2500 2550 2600 2650 2700 1710 2155 LARA-R203 1700 1750 1800 1850 1900 1950 2000 2050 2100 2150 2200 2500 2550 2600 2650 2700 1710 2155 LARA-R204...

  • Page 149: Pin-Out Comparison Between Sara-U2 And Lara-R2

    LARA-R2 series - System Integration Manual A.2 Pin-out comparison between SARA-U2 and LARA-R2 SARA-U2 LARA-R2 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 Output characteristics: Output characteristics: 1.8 V typ, 3 mA max 1.8 V typ, 3 mA max...
  • Page 150 SARA-U2 and LARA-R2 series modules, see the LARA-R2 series Data Sheet [1], the SARA-U2 series Data Sheet [27], the SARA-G3 / SARA-U2 series System Integration Manual [28], the u-blox AT Commands Manual [2] and the Nested Design Application Note [26].

  • Page 151: Schematic For Sara-U2 And Lara-R2 Integration

    GND (C5) Output 47pF 47pF 47pF 47pF 100nF ESD ESD ESD ESD ESD ESD 470k 1.8V DTE Not supported by LARA-R204-02B and LARA-R211-02B product version 0Ω u-blox GNSS 3.0 V receiver 0Ω LDO Regulator 0Ω 100nF 0Ω GPIO2 SHDNn 0Ω TCA9406DCUR...

  • Page 152: B Glossary

    LARA-R2 series - System Integration Manual B Glossary 3GPP 3rd Generation Partnership Project 8-PSK 8 Phase-Shift Keying modulation 16QAM 16-state Quadrature Amplitude Modulation Abstract Control Model Analog to Digital Converter Application Processor Access Point Name ASIC Application-Specific Integrated Circuit AT Command Interpreter Software Subsystem, or attention Automatic Test Equipment Bulk Acoustic Wave Bearer Independent Protocol...
  • Page 153 Moisture Sensitive Device Not Applicable Network Control Model NSMD Non Solder Mask Defined Negative Temperature Coefficient Original Equipment Manufacturer device: an application device integrating a u-blox cellular module Over The Air Power Amplifier Pulse Code Modulation Pulse Frequency Modulation Power Management Unit...
  • Page 154 LARA-R2 series - System Integration Manual Specific Absorption Rate Surface Acoustic Wave SDIO Secure Digital Input Output SDN / IN / PCN Sample Delivery Note / Information Note / Product Change Notification Subscriber Identification Module Solder Mask Defined Short Message Service Surface-Mount Technology SMTP Simple Mail Transfer Protocol...

  • Page 155: Related Documents

    AT Commands Manual, Docu No UBX-13002752 u-blox EVK-R2xx User Guide, Docu No UBX-16016088 u-blox Windows Embedded OS USB Driver Installation Application Note, Docu No UBX-14003263 ITU-T Recommendation V.24 - 02-2000 - List of definitions for interchange circuits between the Data Terminal Equipment (DTE) and the Data Circuit-terminating Equipment (DCE).

  • Page 156: Revision History

    "Disclosure restriction" replaces "Document status" on page 2 and document footer Updated GPRS / EDGE multi-slot class. Added maximum antenna gain for LARA-R204. Extended the document applicability to LARA-R202-02B and LARA-R203-02B. 19-Apr-2017 sses Updated LARA-R204-02B / LARA-R211-02B product status Added maximum antenna gain for LARA-R211.
  • Page 157 LARA-R2 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:...

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