Page 1 System integration manual Abstract This document describes the features and the system integration of TOBY-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 four LTE bands, up to four 3G UMTS/HSPA bands and up to four 2G GSM/EGPRS bands in the compact TOBY LGA form factor.
Page 2: Document Information
TOBY-R2 series - System integration manual Document information Title TOBY-R2 series Subtitle Multi-mode LTE Cat 1 modules with 2G/3G fallback Document type System integration manual Document number UBX-16010572 Revision and date 30-Aug-2019 Disclosure restriction Product status Corresponding content status Functional sample Draft For functional testing.
Page 3: Table Of Contents
TOBY-R2 series - System integration manual Contents Document information ..........................2 Contents ................................3 System description ..........................7 Overview ................................ 7 1.2 Architecture ..............................9 1.3 Pin-out ................................. 10 1.4 Operating modes ............................14 1.5 Supply interfaces ............................16 1.5.1 Module supply input (VCC) ......................
Page 4 2.12 Thermal guidelines ..........................119 2.13 ESD guidelines ............................120 2.13.1 ESD immunity test overview ......................120 2.13.2 ESD immunity test of TOBY-R2 series reference designs ............121 2.13.3 ESD application circuits ......................... 121 2.14 Schematic for TOBY-R2 series module integration ................. 123 2.14.1 Schematic for TOBY-R2 series module “x2”...
Page 5 TOBY-R2 series - System integration manual 2.15 Design-in checklist ..........................124 2.15.1 Schematic checklist ........................124 2.15.2 Layout checklist ..........................125 2.15.3 Antenna checklist ........................... 125 Handling and soldering ........................126 3.1 Packaging, shipping, storage and moisture preconditioning ............126 3.2 Handling ..............................
Page 6 TOBY-R2 series - System integration manual Revision history ............................150 Contact ................................. 151 UBX-16010572 - R10 Page 6 of 151...
Page 7: System Description
System description Overview The TOBY-R2 series comprises LTE Cat 1 / 3G / 2G multi-mode modules supporting up to six LTE bands, up to four 3G UMTS/HSPA bands and up to four 2G GSM/(E)GPRS bands for voice and/or data transmission in the small TOBY LGA form-factor (35.6 x 24.8 mm, 152-pin), easy to integrate in compact designs: ...
Page 8 296 kb/s DL, up to 236.8 kb/s UL Table 2: TOBY-R2 series LTE, 3G and 2G characteristics summary TOBY-R2 series modules, except for the "42" / "82" product versions, provide Voice over LTE (VoLTE) as well as Circuit-Switched-Fall-Back (CSFB) audio capability.
Page 9: Architecture
Power Management Unit External Reset V_INT (I/O) Figure 1: TOBY-R2 series modules simplified block diagram TOBY-R2 series modules internally consists of the RF, Baseband and Power Management sections here described with more details than the simplified block diagrams of Figure RF section The RF section is composed of RF transceiver, PAs, LNAs, crystal oscillator, filters, duplexers and RF switches.
Page 10: Pin-Out
32.768 kHz crystal oscillator to provide the clock reference in the low power idle-mode, which can be set by enable power saving configuration using the AT+UPSV command. 1.3 Pin-out Table 3 lists the pin-out of the TOBY-R2 series modules, with pins grouped by function. Function Pin Name Pin No Description...
Page 11 TOBY-R2 series - System integration manual Function Pin Name Pin No Description Remarks HOST_SELECT1 62 Selection of module/ Not supported. host configuration See section 1.6.4 for functional description. See section 2.3.3 for external circuit design-in. Antennas ANT1 Primary antenna Main Tx / Rx antenna interface.
Page 12 TOBY-R2 series - System integration manual Function Pin Name Pin No Description Remarks UART ring indicator 1.8 V, Circuit 125 in ITU-T V.24. output See section 1.9.1 for functional description. See section 2.6.1 for external circuit design-in. UART data terminal 1.8 V, Circuit 108/2 in ITU-T V.24.
Page 13 See sections 1.13 RSVD 1, 7-9, 29, N/A Reserved pin Leave unconnected. 31, 33-43, See sections 1.13 45, 47-49, 77, 84, 91 Table 3: TOBY-R2 series module pin definition, grouped by function UBX-16010572 - R10 System description Page 13 of 151...
Page 14: Operating Modes
TOBY-R2 series - System integration manual 1.4 Operating modes TOBY-R2 series modules have several operating modes. The operating modes are defined in Table 4 and described in detail in Table 5, providing general guidelines for operation. General Status Operating Mode...
Page 15 RF Tx/Rx is necessary. When a data connection is terminated, the module returns to the active-mode. Table 5: TOBY-R2 series modules operating modes description Figure 2 describes the transition between the different operating modes. powered...
Page 16: 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 TOBY-R2 series modules through the VCC pins can vary by several orders of magnitude. This ranges from the pulse of current consumption during GSM transmitting bursts at maximum power level in connected-mode (as described in section 1.5.1.2) to...
Page 17 Table ⚠ The VCC supply circuit affects the RF compliance of the device integrating TOBY-R2 series modules with applicable required certification schemes as well as antenna circuit design. Compliance is met by fulfilling the requirements for the VCC supply summarized in...
Page 18 RF power level (approximately 2 W or 33 dBm in the allocated transmit slot/burst) the current consumption can reach an high peak (see the “Current consumption” section in the TOBY-R2 series data sheet [1]) for 576.9 µs (width of the transmit slot/burst) with a periodicity of 4.615 ms (width of 1 frame = 8 slots/burst), so with a 1/8 duty cycle according to GSM TDMA (Time Division Multiple Access).
Page 19 TOBY-R2 series - System integration manual When a GPRS connection is established, more than one slot can be used to transmit and/or more than one slot can be used to receive. The transmitted power depends on network conditions, which set the...
Page 20 (approximately 250 mW or 24 dBm), the average current drawn by the module at the VCC pins is considerable (see the “Current consumption” section in TOBY-R2 series data sheet [1]). At the lowest output RF power (approximately 0.01 µW or –50 dBm), the current drawn by the internal power amplifier is strongly reduced.
Page 21 (approximately 250 mW or 24 dBm), the average current drawn by the module at the VCC pins is considerable (see the “Current consumption” section in TOBY-R2 series data sheet [1]). At the lowest output RF power (approximately 0.1 µW or –40 dBm), the current drawn by the internal power amplifier is strongly reduced and the total current drawn by the module at the VCC pins is due to baseband processing and transceiver activity.
Page 22 The module is registered with network, automatically enters the low power idle-mode and periodically wakes up to active-mode to monitor the paging channel for the paging block reception. Detailed current consumption values can be found in TOBY-R2 series data sheet [1]. Current [mA]...
Page 23 In such case, the module is registered with the network and while active-mode is maintained, the receiver is periodically activated to monitor the paging channel for paging block reception. Detailed current consumption values can be found in TOBY-R2 series data sheet [1]. Current [mA]...
Page 24: Rtc Supply Input/Output (V_Bckp)
TOBY-R2 series - System integration manual 1.5.2 RTC supply input/output (V_BCKP) The V_BCKP pin of TOBY-R2 series modules connects the supply for the Real Time Clock (RTC). A linear LDO regulator integrated in the Power Management Unit internally generates this supply, as shown in Figure 11, with low current capability (see the TOBY-R2 series data sheet [1]).
Page 25: Generic Digital Interfaces Supply Output (V_Int)
1.5.3 Generic digital interfaces supply output (V_INT) The V_INT output pin of the TOBY-R2 series modules is connected to an internal 1.8 V supply with current capability specified in the TOBY-R2 series data sheet [1]. This supply is internally generated...
Page 26: System Function Interfaces
VCC supply voltage stabilizes at its proper nominal value within the operating range When the TOBY-R2 series modules are in the power-off mode (i.e. switched off with valid VCC module supply applied), they can be switched on as following: ...
Page 27 ☞ Before the TOBY-R2 series module is fully ready to operate, the host application processor should not send any AT command over the AT communication interfaces (USB, UART) of the module. ☞...
Page 28: Module Power-Off
☞ It is highly recommended to avoid an abrupt removal of the VCC supply during TOBY-R2 series modules normal operations: the switch off procedure must be started by the AT+CPWROFF command, waiting the command response for a proper time period (see u-blox AT commands manual [2]), and then a proper VCC supply has to be held at least until the end of the modules’...
Page 29 V_INT voltage level has gone low. ☞ The duration of each phase in the TOBY-R2 series modules’ switch-off routines can largely vary depending on the application / network settings and the concurrent module activities. UBX-16010572 - R10...
Page 30  A low pulse with appropriate time duration (see TOBY-R2 series data sheet [1]) is applied at the PWR_ON input pin, which is normally set high by an internal pull-up: the module starts the switch- off routine when the PWR_ON signal is released from the low logical level.
Page 31: Module Reset
An abrupt hardware reset occurs on TOBY-R2 series modules when a low level is applied on RESET_N input pin. In this case, the current parameter settings are not saved in the module’s non-volatile memory and a proper network detach is not performed.
Page 32: Antenna Interface
2.4.1 for suggestions to properly design antennas circuits compliant with these requirements. ⚠ The antenna circuits affect the RF compliance of the device integrating TOBY-R2 series modules with applicable required certification schemes (for more details see section 4). Compliance is met...
Page 33 TOBY-R2 series - System integration manual Item Requirement Remark Impedance The impedance of the antenna RF connection must match the 50 50  nominal characteristic impedance  impedance of the ANT2 port. Frequency See the TOBY-R2 series data sheet The required frequency range of the antennas connected to ANT2...
Page 34: Antenna Detection Interface (Ant_Det)
See the u-blox AT commands manual for more details on this feature. The ANT_DET pin generates a DC current (for detailed characteristics see the TOBY-R2 series data sheet [1]) and measures the resulting DC voltage, thus determining the resistance from the antenna connector provided on the application board to GND.
Page 35: Data Communication Interfaces
DTE (host processor output) and received by the DCE (module input). TOBY-R2 series modules’ UART interface is by default configured in AT command mode: the module waits for AT command instructions and interprets all the characters received as commands to execute.
Page 36 TOBY-R2 series - System integration manual Flow control handshakes are supported by the UART interface and can be set by appropriate AT commands (see u-blox AT commands manual [2], &K, +IFC, \Q AT commands): hardware flow control (over the RTS / CTS lines), software flow control (XON/XOFF), or none flow control.
Page 37 TOBY-R2 series - System integration manual 1.9.1.2 UART interface configuration The UART interface of TOBY-R2 series modules is available as AT command interface with the default configuration described in Table 10 (for more details and information about further settings, see the u-blox AT commands manual [2]).
Page 38 TOBY-R2 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, as it is by default, the CTS line indicates when the UART...
Page 39 TOBY-R2 series - System integration manual DSR signal behavior If AT&S1 is set, as it is by default, the DSR module output line is set by default to the OFF state (high level) at UART initialization. The DSR line is then set to the OFF state when the module is in command...
Page 40 TOBY-R2 series - System integration manual ☞ The DCD line is kept in the ON state, even during the online command mode , to indicate that the data call is still established even if suspended, while if the module enters command mode , the DSR line is set to the OFF state.
Page 41 TOBY-R2 series - System integration manual For SMS arrival, if several events coincidently occur or in quick succession each event independently triggers the RI line, although the line will not be deactivated between each event. As a result, the RI...
Page 42 TOBY-R2 series - System integration manual AT+UPSV HW flow control RTS line DTR line Communication during idle-mode and wake up Enabled (AT&K3) ON ON or OFF Data sent by the DTE is buffered by the DTE and will be correctly received by the module when it is ready to receive data (when the UART is enabled).
Page 43 TOBY-R2 series - System integration manual AT+UPSV=1: power saving enabled, cyclic idle/active-mode When the AT+UPSV=1 command is issued by the DTE, the UART will be normally disabled, and then periodically or upon necessity enabled as following:  During the periodic UART wake up to receive or send data, also according to the module wake up for the paging reception (see section 1.5.1.5) or other activities...
Page 44 TOBY-R2 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 hardware flow control disabled (i.e. AT&K0 setting). The UART interface is disabled after the DTE sets the RTS line to OFF.
Page 45 TOBY-R2 series - System integration manual The TXD input line is configured to wake up the system via data reception in the following case:  AT+UPSV=1 is set with HW flow control disabled Figure 22 Figure 23 show examples of common scenarios and timing constraints: ...
Page 46: Usb Interface
The USB interface of the module is enabled only if a valid voltage is detected by the VUSB_DET input (see the TOBY-R2 series data sheet [1]). Neither the USB interface, nor the whole module is supplied by the VUSB_DET input: the VUSB_DET senses the USB supply voltage and absorbs few microamperes.
Page 47 The RI virtual signal is not supported over USB CDC-ACM by “02” / "42" / "82" product versions. The USB profile of TOBY-R2 series modules identifies itself by its VID (Vendor ID) and PID (Product ID) combination, included in the USB device descriptor according to the USB 2.0 specifications [6].
Page 48 Transfer: Bulk EndPoint Transfer: Bulk Figure 24: TOBY-R2 series USB End-Points summary for the default USB profile configuration 1.9.2.2 USB in Windows USB drivers are provided for Windows operating system platforms and should be properly installed / enabled by following the step-by-step instructions available in the EVK-R2xx user guide or in the Windows Embedded OS USB driver installation application note [4].
Page 49: Ddc (I2C) Interface
TOBY-R2 series data sheet [1]. The additional VUSB_DET input pin available on TOBY-R2 series modules provides the complete bus detach functionality: the modules disable the USB interface when a low logic level is sensed after a high-to-low logic level transition on the VUSB_DET input pin. This allows a further reduction of the module current consumption, in particular as compared to the USB suspended status during low-power idle mode with power saving enabled.
Page 50 TOBY-R2 series - System integration manual DDC (I2C) slave-mode operation is not supported: the TOBY-R2 series module can act as I2C master that can communicate with more I2C slaves in accordance to the I2C bus specifications [12]. The DDC (I2C) interface pins of the module, serial data (SDA) and serial clock (SCL), are open drain outputs conforming to the I2C bus specifications [12].
Page 51: Sdio Interface
1.9.4 SDIO interface ☞ Secure Digital Input Output interface is not supported by TOBY-R2 series modules “02” / "42" / "82" product versions. TOBY-R2 series modules include a 4-bit Secure Digital Input Output interface (SDIO_D0, SDIO_D1, SDIO_D2, SDIO_D3, SDIO_CLK, SDIO_CMD) designed to communicate with an external u-blox short...
Page 52: Audio
TOBY-R2 series - System integration manual 1.10 Audio ☞ Audio interface is not supported by TOBY-R2 series modules "42" / "82" product versions. 1.10.1 Digital audio over I2S interface TOBY-R2 series modules include a 4-wire I2S digital audio interface (I2S_TXD data output, I2S_RXD...
Page 53: Clock Output
GPIO1 Table 12: TOBY-R2 series GPIO custom functions configuration 1.13 Reserved pins (RSVD) TOBY-R2 series modules have pins reserved for future use, marked as RSVD: they can all be left unconnected on the application board, except  the RSVD pin number 6 that must be externally connected to ground ...
Page 54: System Features
[2], +UCD AT command). 1.14.4 Dual stack IPv4/IPv6 TOBY-R2 series support both Internet Protocol version 4 and Internet Protocol version 6 in parallel. For more details about dual stack IPv4/IPv6 see the u-blox AT commands manual [2]. UBX-16010572 - R10...
Page 55: Tcp/Ip And Udp/Ip
TOBY-R2 series - System integration manual 1.14.5 TCP/IP and UDP/IP TOBY-R2 series modules provide embedded TCP/IP and UDP/IP protocol stack: a PDP context can be configured, established and handled via the data connection management packet switched data commands. TOBY-R2 series modules provide Direct Link mode to establish a transparent end-to-end communication with an already connected TCP or UDP socket via serial interfaces (USB, UART).
Page 56 TOBY-R2 series - System integration manual The security aspects used during a connection depend on the SSL/TLS configuration and features supported. Table 13 contains the settings of the default SSL/TLS profile and Table 14 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 57: Bearer Independent Protocol
Full access to u-blox GNSS receivers is available via the TOBY-R2 series cellular module, through the DDC (I2C) interface, while the available GPIOs can handle the positioning chipset / module power-on/off.
Page 58: Hybrid Positioning And Celllocate
TOBY-R2 series - System integration manual 1.14.11 Hybrid positioning and CellLocate ® ☞ Hybrid positioning and CellLocate® are not supported by the TOBY-R200-02B-00 and the TOBY-R202-02B-00 type numbers. Although GNSS is a widespread technology, its reliance on the visibility of extremely weak GNSS satellite signals means that positioning is not always possible.
Page 59 TOBY-R2 series - System integration manual If a new device reports the observation of Cell A CellLocate ® is able to provide the estimated position from the area of visibility The visibility of multiple cells provides increased accuracy based on the intersection of areas of visibility.
Page 60: Wi-Fi Integration
TOBY-R2 series - System integration manual The use of hybrid positioning requires a connection via the DDC (I2C) bus between the TOBY-R2 series cellular module and the u-blox GNSS receiver (see sections 1.9.3 and 2.6.3). See GNSS implementation application note [13] for the complete description of the feature.
Page 61: Smart Temperature Management
TOBY-R2 series - System integration manual 1.14.15 Smart temperature management Cellular 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 62 TOBY-R2 series - System integration manual Figure 26 shows the flow diagram implemented for the Smart Temperature Supervisor. IF STS enabled Feature enabled Feature disabled: (full logic or no action indication only) Read temperature <Ti<t Temperature is within normal operating range...
Page 63: Power Saving
 A preset RTC alarm occurs (see u-blox AT commands manual [2], AT+CALA) For the definition and the description of TOBY-R2 series modules operating modes, including the events forcing transitions between the different operating modes, see the section 1.4. UBX-16010572 - R10...
Page 64: Design-In
TOBY-R2 series - System integration manual Design-in Overview For an optimal integration of TOBY-R2 series 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 relative interface, however a number of points require high attention during the design of the application device.
Page 65: Supply Interfaces
(low impedance) connection to external ground can minimize power loss and improve RF and thermal performance. TOBY-R2 series modules must be sourced through the VCC pins with a proper DC power supply that should meet the following prerequisites to comply with the modules’ VCC requirements summarized...
Page 66 TOBY-R2 series data sheet [1]. The additional energy required by the module during a 2G Tx slot can be provided by an appropriate bypass tank capacitor or a super-capacitor with very large capacitance and very low ESR placed close to the module VCC pins.
Page 67 TOBY-R2 series - System integration manual  PWM mode operation: it is preferable to select regulators with Pulse Width Modulation (PWM) mode. While in connected-mode, the Pulse Frequency Modulation (PFM) mode and PFM/PWM modes transitions must be avoided to reduce noise on VCC voltage profile. Switching regulators...
Page 68 TOBY-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 to VCC pins the specified maximum peak / pulse current, transforming a 12 V supply input.
Page 69 VCC pins within the specified operating range and must be capable of delivering to VCC pins the maximum peak / pulse current consumption during Tx burst at maximum Tx power specified in TOBY-R2 series data sheet [1]. ...
Page 70 DC current as the maximum average current consumption specified in TOBY-R2 series data sheet [1]. The maximum discharge current is not always reported in the data sheets of batteries, but the maximum DC discharge current is typically almost equal to the battery capacity in Amp-hours divided by 1 hour.
Page 71 GSM call (when current consumption on the VCC supply can rise up as specified in the TOBY-R2 series data sheet [1]), place a bypass capacitor with large capacitance (at least 100 µF) and low ESR near the VCC pins, for example: ...
Page 72 TOBY-R200 support two different extended operating voltage ranges: one for the VCC pins #71 and #72, and another one for the VCC pin #70 (see the TOBY-R2 series data sheet [1]). All the VCC pins are in general intended to be connected to the same external power supply circuit, but separate supply sources can be implemented for specific (e.g.
Page 73 AP3015 - Diodes Incorporated Table 25: Example of components for VCC circuit with separate supply for TOBY-R200 modules 2.2.1.8 Guidelines for external battery charging circuit TOBY-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.
Page 74 TOBY-R2 series - System integration manual The L6924U, as linear charger, is more suitable for applications where the charging source has a relatively low nominal voltage (~5 V), so that a switching charger is suggested for applications where the charging source has a relatively high nominal voltage (e.g. ~12 V, see the following section 2.2.1.9...
Page 75 TOBY-R2 series - System integration manual A power management IC should meet the following prerequisites to comply with the module VCC requirements summarized in Table  High efficiency internal step down converter, with characteristics as indicated in section 2.2.1.2 ...
Page 76 TOBY-R2 series - System integration manual Several parameters as the charging current, the charging timings, the input current limit, the input voltage limit, the system output voltage can be easily set according to the specific application requirements, as the actual electrical characteristics of the battery and the external supply / charging source: proper resistors or capacitors have to be accordingly connected to the related pins of the IC.
Page 77 Table 28: Components for VCC supply removal application circuit ☞ It is highly recommended to avoid an abrupt removal of the VCC supply during TOBY-R2 series modules normal operations: the power off procedure must be started by the AT+CPWROFF command, waiting the command response for a proper time period (see u-blox AT commands manual [2]), and then a proper VCC supply has to be held at least until the end of the modules’...
Page 78 TOBY-R2 series - System integration manual 2.2.1.11 Guidelines for VCC supply layout design Good connection of the module VCC pins with 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 79: Rtc Supply Output (V_Bckp)
TOBY-R2 series - System integration manual 2.2.2 RTC supply output (V_BCKP) 2.2.2.1 Guidelines for V_BCKP circuit design TOBY-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 80 V_BCKP. Combining a TOBY-R2 series cellular module with a u-blox GNSS positioning receiver, the positioning receiver VCC supply is controlled by the cellular module by means of the “GNSS supply enable”...
Page 81: Generic Digital Interfaces Supply Output (V_Int)
Since the V_INT supply is generated by an internal switching step-down regulator, the V_INT voltage ripple can range as specified in the TOBY-R2 series data sheet [1]: it is not recommended to supply sensitive analog circuitry without adequate filtering for digital noise.
Page 82: System Functions Interfaces
The power-on circuit (PWR_ON) requires careful layout since it is the sensitive input available to switch on the TOBY-R2 series modules. It is required to 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 power-on request.
Page 83: Module Reset (Reset_N)
TOBY-R2 series - System integration manual 2.3.2 Module reset (RESET_N) 2.3.2.1 Guidelines for RESET_N circuit design TOBY-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.
Page 84: Module / Host Configuration Selection
Selection of module / host configuration over HOST_SELECT0 and HOST_SELECT1 pins is not supported: the two pins should not be driven by the host application processor or any other external device. TOBY-R2 series modules include two pins (HOST_SELECT0 and HOST_SELECT1) for the selection of the module / host application processor configuration. ☞...
Page 85: Antenna Interface
RF compliance of the device integrating TOBY-R2 series modules with all the applicable required certification schemes depends on antennas radiating performance.
Page 86 TOBY-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.
Page 87 TOBY-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 88 TOBY-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 Figure  the gap from the transmission line to the adjacent ground plane on the same layer of the transmission line (e.g.
Page 89 TOBY-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.
Page 90 TOBY-R2 series - System integration manual  Place the two LTE antennas providing enough high isolation (see Table 9) between primary (ANT1) and secondary (ANT2) antenna. The isolation depends on the distance between antennas (separation of at least a quarter wavelength required for good isolation), antenna type (using antennas with different polarization improves isolation), antenna 3D radiation patterns (uncorrelated patterns improve isolation).
Page 91 TOBY-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...
Page 92: Antenna Detection Interface (Ant_Det)
TOBY-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 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’...
Page 93 TOBY-R2 series - System integration manual Furthermore, any other DC signal injected to the RF connection from ANT connector to radiating element will alter the measurement and produce invalid results for antenna detection. ☞ It is recommended to use an antenna with a built-in diagnostic resistor in the range from 5 k to 30 k...
Page 94: Sim Interface
TOBY-R2 series - System integration manual 2.5 SIM interface 2.5.1 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 95 TOBY-R2 series - System integration manual Guidelines for single SIM card connection without detection A removable SIM card placed in a SIM card holder has to be connected to the SIM card interface of TOBY-R2 series modules as described in...
Page 96 TOBY-R2 series - System integration manual Guidelines for single SIM chip connection A solderable SIM chip (M2M UICC Form Factor) has to be connected the SIM card interface of TOBY-R2 series modules as described in Figure Follow these guidelines to connect the module to a solderable SIM chip without SIM presence detection: ...
Page 97 TOBY-R2 series - System integration manual  Connect one pin of the normally-open mechanical switch integrated in the SIM connector (e.g. the SW2 pin as described in Figure 48) to the GPIO5 input pin of the module.  Connect the other pin of the normally-open mechanical switch integrated in the SIM connector (e.g.
Page 98 Two SIM card / chip can be connected to the SIM interface of TOBY-R2 series modules as described Figure TOBY-R2 series 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...
Page 99: Guidelines For Sim Layout Design
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 TOBY-R2 series modules or in close proximity to the RF antenna: these two cases should be avoided or at least mitigated as described below.
Page 100: Data Communication Interfaces
TOBY-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 101 TOBY-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 102 TOBY-R2 series - System integration manual Providing the TXD, RXD, RTS and CTS lines only (not using the complete V.24 link) If the functionality of the DSR, DCD, RI and DTR lines is not required in, or the lines are not available: ...
Page 103 TOBY-R2 series - System integration manual Providing the TXD and RXD lines only (not using the complete V24 link) If the functionality of the CTS, RTS, DSR, DCD, RI and DTR lines is not required in the application, or the lines are not available, then: ...
Page 104 TOBY-R2 series - System integration manual 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 corresponding 1.8 V input of the module (DCE) can be implemented as an alternative low-cost solution, by means of an appropriate voltage divider.
Page 105: Usb Interface
The USB interface of the module is enabled only if a valid high logic level is detected by the VUSB_DET input (see the TOBY-R2 series data sheet [1]). Neither the USB interface, nor the whole module is supplied by the VUSB_DET input: the VUSB_DET senses the USB supply voltage and absorbs few microamperes.
Page 106 TOBY-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.
Page 107: Ddc (I2C) Interface
TOBY-R2 series - System integration manual 2.6.3 DDC (I2C) interface 2.6.3.1 Guidelines for DDC (I2C) circuit design General considerations ☞ Communication with u-blox GNSS receivers over (I2C) is not supported by TOBY-R200-02B-00 and TOBY-R202-02B-00 type numbers. ☞ “GNSS RTC sharing” function is not supported by “02” / "42" / "82" product versions.
Page 108 GNSS Tx data ready TxD1 GPIO3 GNSS RTC sharing EXTINT0 GPIO4 Figure 61: Application circuit for connecting TOBY-R2 series modules to u-blox 1.8 V GNSS receivers Reference Description Part Number - Manufacturer R1, R2 4.7 k Resistor 0402 5% 0.1 W RC0402JR-074K7L - Yageo Phycomp 47 k...
Page 109 TxD1 GPIO3 GNSS RTC sharing EXTINT0 GPIO4 Figure 62: Application circuit for connecting TOBY-R2 series modules to u-blox 1.8 V GNSS receivers using V_INT as supply Reference Description Part Number - Manufacturer R1, R2 4.7 k Resistor 0402 5% 0.1 W...
Page 110 TxD1 GPIO3 GNSS RTC sharing EXTINT0 GPIO4 DIR2 Figure 63: Application circuit for connecting TOBY-R2 series modules to u-blox 3.0 V GNSS receivers Reference Description Part Number - Manufacturer R1, R2, R4, R5 RC0402JR-074K7L - Yageo Phycomp 4.7 k Resistor 0402 5% 0.1 W 47 k...
Page 111: Sdio Interface
☞ The functionality of the SDIO Secure Digital Input Output interface pins is not supported by TOBY-R2 series modules “02” / "42" / "82" product versions: the pins should not be driven by any external device. TOBY-R2 series modules include a 4-bit Secure Digital Input Output interface (SDIO_D0, SDIO_D1, SDIO_D2, SDIO_D3, SDIO_CLK, SDIO_CMD) designed to communicate with an external u-blox short range Wi-Fi module.
Page 112: Audio Interface
TOBY-R2 series cellular module can be used, given that the external digital audio device must provide:  The opposite role: slave or master role, as TOBY-R2 series modules may act as master or slave  The same mode and frame format: PCM / short synch mode or Normal I2S / long synch mode with data in 2’s complement notation, linear...
Page 113  The external audio codec is controlled by the TOBY-R2 series module using the DDC (I2C) interface, which can concurrently communicate with other I2C devices and control an external audio codec.
Page 114 TOBY-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 µ F Capacitor Ceramic X5R 0402 10% 6.3 V GRM155R60J105KE19 – Murata 10 µ...
Page 115 TOBY-R2 series - System integration manual General guidelines for the uplink path (microphone), which is commonly the most sensitive, are the following:  Avoid coupling of any noisy signal to microphone lines: it is strongly recommended to route microphone lines away from module VCC supply line, any switching regulator line, RF antenna lines, digital lines and any other possible noise source.
Page 116: General Purpose Input/Output
TOBY-R2 series - System integration manual 2.8 General Purpose Input/Output 2.8.1.1 Guidelines for GPIO circuit design A typical usage of TOBY-R2 series modules’ GPIOs can be the following:  Network indication provided over GPIO1 pin (see Figure 65 Table 49 below) ...
Page 117: Reserved Pins (Rsvd)
TOBY-R2 series - System integration manual 2.9 Reserved pins (RSVD) TOBY-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 pins as described in Figure ...
Page 118: Module Footprint And Paste Mask
The Non Solder resist Mask Defined (NSMD) pad type is recommended over the Solder resist Mask Defined (SMD) pad type, implementing the solder mask opening 50 µm larger per side than the corresponding copper pad. The suggested paste mask layout for TOBY-R2 series modules slightly reflects the copper mask layout described in Figure 67...
Page 119: Thermal Guidelines
GND pads of the TOBY-R2 series LGA modules and dissipated over the backside of the application board.
Page 120: Esd Guidelines
EMC / ESD immunity. The modules are ESD sensitive devices, and the ESD sensitivity for each pin (as Human Body Model according to JESD22-A114F) is specified in TOBY-R2 series data sheet [1]. Special precautions are required when handling: see section for handling guidelines.
Page 121: Esd Immunity Test Of Toby-R2 Series Reference Designs
Table Antenna interface The ANT1 and ANT2 ports of TOBY-R2 series modules provide 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 TOBY-R2 series modules.
Page 122 (section 2.5). Other pins and interfaces All the module pins that are externally accessible on the device integrating TOBY-R2 series module should be included in the ESD immunity test since they are considered to be a port as defined in ETSI EN 301 489-1 [16].
Page 123: Schematic For Toby-R2 Series Module Integration
2.14.1 Schematic for TOBY-R2 series module “x2” product version Figure 68 is an example of a schematic diagram where a TOBY-R2 series module "02", "42" or "82" product version is integrated into an application board, using all the available interfaces and functions of the module.
Page 124: Design-In Checklist
Provide proper precautions for EMC / ESD immunity as required on the application board.  Do not apply voltage to any generic digital interface pin of TOBY-R2 series modules before the switch-on of the generic digital interface supply source (V_INT).
Page 125: Layout Checklist
 Optimize placement for minimum length of RF line.  Check the footprint and paste mask designed for TOBY-R2 series module as illustrated in section 2.11.  VCC line should be wide and as short as possible.
Page 126: Handling And Soldering
The term is usually used in the electronics and other industries to describe momentary unwanted currents that may cause damage to electronic equipment. The ESD sensitivity for each pin of TOBY-R2 series modules (as Human Body Model according to JESD22-A114F) is specified in the TOBY-R2 series data sheet [1].
Page 127: Soldering
3.3 Soldering 3.3.1 Soldering paste "No Clean" soldering paste is strongly recommended for TOBY-R2 series modules, 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)
Page 128: Optical Inspection
☞ The modules must not be soldered with a damp heat process. 3.3.3 Optical inspection After soldering the TOBY-R2 series modules, inspect the modules optically to verify that the module is properly aligned and centered. 3.3.4 Cleaning Cleaning the modules is not recommended. Residues underneath the modules cannot be easily removed with a washing process.
Page 129: Repeated Reflow Soldering
Boards with combined through-hole technology (THT) components and surface-mount technology (SMT) devices require wave soldering to solder the THT components. No more than one wave soldering process is allowed for a board with a TOBY-R2 series module already populated on it. ⚠...
Page 130: Grounding Metal Covers
TOBY-R2 series - System integration manual 3.3.11 Grounding metal covers Attempts to improve grounding by soldering ground cables, wick or other forms of metal strips directly onto the 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.
Page 131: Approvals
The required certification scheme approvals and relative testing specifications differ depending on the country or the region where the device that integrates TOBY-R2 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 132: Us Federal Communications Commission Notice
⚠ The gain of the system antenna(s) used for the TOBY-R2 series modules (i.e. the combined transmission line, connector, cable losses and radiating element gain) must not exceed the value specified in the FCC Grant for mobile and fixed or mobile operating configurations: TOBY-R200 modules: 9.8 dBi in 700 MHz, i.e.
Page 133: Modifications
⚠ Manufacturers of mobile or fixed devices incorporating the TOBY-R2 series modules are authorized to use the FCC Grants of the TOBY-R2 series modules for their own final products according to the conditions referenced in the certificates. ⚠...
Page 134: Innovation, Science, Economic Development Canada Notice
⚠ Manufacturers of mobile or fixed devices incorporating the TOBY-R2 series modules are authorized to use the ISED Canada Certificates of the TOBY-R2 series modules for their own final products according to the conditions referenced in the certificates. ⚠...
Page 135 ⚠ IMPORTANT: Manufacturers of portable applications incorporating the TOBY-R2 series modules are required to have their final product certified and apply for their own Industry Canada Certificate related to the specific portable device. This is mandatory to meet the SAR requirements for portable devices.
Page 136: European Conformance Ce Mark
⚠ IMPORTANT: les fabricants d'applications portables contenant les modules TOBY-R2 series doivent faire certifier leur produit final et déposer directement leur candidature pour une certification FCC ainsi que pour un certificat ISDE Canada délivré par l'organisme chargé de ce type d'appareil portable.
Page 137: Product Testing
TOBY-R2 series - System integration manual 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 production line. Stringent quality control process has been implemented in the production line.
Page 138: Test Parameters For Oem Manufacturer
TOBY-R2 series - System integration manual 5.2 Test parameters for OEM manufacturer Because of the testing done by u-blox (with 100% coverage), an OEM manufacturer does not need to repeat firmware tests or measurements of the module RF performance or tests over analog and digital interfaces in their production test.
Page 139 TOBY-R2 series - System integration manual ⚠ To avoid module damage during transmitter test, a proper antenna according to module specifications or a 50  termination must be connected to ANT1 port. ⚠ To avoid module damage during receiver test the maximum power level received at ANT1 and ANT2 ports must meet module specifications.
Page 140: Appendix
Appendix A Migration between TOBY-L2 and TOBY-R2 A.1 Overview TOBY-L2 and TOBY-R2 series cellular modules have exactly the same TOBY form factor (35.6 x 24.8 mm LGA) with exactly the same 152-pin layout as described in Figure 72, so that the modules can be alternatively mounted on a single application board using exactly the same copper mask, solder mask and paste mask.
Page 141 ○ = supported by all product versions except version ‘00’ □ = supported by all product versions except versions ‘02’,‘42’,‘82’ Table 53: Summary of TOBY-L2 series and TOBY-R2 series modules interfaces LTE bands 1 and 8 are supported by TOBY-R200-42B / TOBY-R200-82B...
Page 142: Pin-Out Comparison Between Toby-L2 And Toby-R2
2600 2650 2700 = 2G bands 1710 2155 Figure 74: Summary of TOBY-L2 and TOBY-R2 series modules LTE, 3G and 2G operating frequency bands A.2 Pin-out comparison between TOBY-L2 and TOBY-R2 TOBY-L2 TOBY-R2 Pin No Pin Name Description Pin Name...
Page 143 TOBY-R2 series - System integration manual TOBY-L2 TOBY-R2 Pin No Pin Name Description Pin Name Description Remarks for migration UART CTS Output UART CTS Output UART Data Input UART Data Input UART Data Output UART Data Output RSVD Reserved RSVD...
Page 144 For further details regarding the characteristics, capabilities, usage or settings applicable for each interface of the cellular modules, see the TOBY-R2 series data sheet [1], the TOBY-L2 series data sheet [25], the TOBY-L2 / MPCI-L2 series system integration manual [26], the u-blox AT commands manual and the nested design application note [27].
Page 145: Schematic For Toby-L2 And Toby-R2 Integration
A.3 Schematic for TOBY-L2 and TOBY-R2 integration Figure 75 shows an example schematic diagram where a TOBY-L2 series module or a TOBY-R2 series module (“00”, “01”, “02”, “42”, “60”, “62”, or “82” product versions) can be integrated into the same application board, using all the available interfaces and functions of the module.
Page 146: B Glossary
TOBY-R2 series - System integration manual B Glossary Abbreviation Definition 3GPP 3rd Generation Partnership Project 8-PSK 8 Phase-Shift Keying modulation 16QAM 16-state Quadrature Amplitude Modulation 64QAM 64-state Quadrature Amplitude Modulation Abstract Control Model Analog to Digital Converter Application Processor ASIC...
Page 147 TOBY-R2 series - System integration manual Abbreviation Definition Inter-Integrated Circuit interface Inter IC Sound interface Internet Protocol Low-Dropout Land Grid Array Low Noise Amplifier LPDDR Low Power Double Data Rate synchronous dynamic RAM memory Long Term Evolution Machine-to-Machine MBIM Mobile Broadband Interface Model...
Page 148 TOBY-R2 series - System integration manual Abbreviation Definition Up-Link (Transmission) UMTS Universal Mobile Telecommunications System Universal Serial Bus Voltage Controlled Oscillator VoLTE Voice over LTE VSWR Voltage Standing Wave Ratio Wi-Fi Wireless Local Area Network (IEEE 802.11 short range radio technology) WLAN Wireless Local Area Network (IEEE 802.11 short range radio technology)
Page 149: Related Documents
TOBY-R2 series - System integration manual Related documents u-blox TOBY-R2 series data sheet, doc. no. UBX-16005785 u-blox AT commands manual, doc. no. UBX-13002752 u-blox EVK-R2 user guide, doc. no. UBX-16016088 u-blox Windows Embedded OS USB driver installation application note, doc. no.
Page 150 TOBY-R2 series - System integration manual Revision history Revision Date Name Comments 08-Jul-2016 sses Initial release for TOBY-R2 series modules 23-Sep-2016 sses Updated status to Advance Information. Updated Power-on, GPIO and Clock Output description Other minor corrections and updates 10-Oct-2016 lpah Reverted status to Objective Specification.
Page 151 TOBY-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:...

This manual is also suitable for:

Toby-r200-02b Toby-r202-02b Toby-r200-82b Toby-r200-42b

Ublox TOBY-R2 Series System Integration Manual

Document Information

Contents

2 Design-In

3 Handling and Soldering

4 Approvals

5 Product Testing

Appendix

A Migration between TOBY-L2 and TOBY-R2

B Glossary

Related Documents

Quick Links

Related Manuals for Ublox TOBY-R2 Series

Summary of Contents for Ublox TOBY-R2 Series

This manual is also suitable for:

Table of Contents