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TOBY-L3 series

Multi-mode LTE (Cat 4) modules with 3G and 2G fallback

System Integration Manual

35.6 x 24.8 x 2.6 mm

Abstract

This document describes the features and the system integration of TOBY-L3 series multi-mode cellular

modules. The modules are a complete and cost efficient LTE-FDD, LTE-TDD, DC-HSPA+, (E)GPRS multi-

mode and multi-band solution with open CPU embedded Linux programming capability. The modules

offer up to 150 Mb/s download and up to 50 Mb/s upload data rates with Category 4 LTE technology in

the compact TOBY form factor.

Summary of content (143 pages)

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TOBY-L3 series Multi-mode LTE (Cat 4) modules with 3G and 2G fallback System Integration Manual 35.6 x 24.8 x 2.6 mm Abstract This document describes the features and the system integration of TOBY-L3 series multi-mode cellular modules. The modules are a complete and cost efficient LTE-FDD, LTE-TDD, DC-HSPA+, (E)GPRS multimode and multi-band solution with open CPU embedded Linux programming capability.
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TOBY-L3 series - System Integration Manual Document Information Title TOBY-L3 series Subtitle Multi-mode LTE (Cat 4) modules with 3G and 2G fallback Document type System Integration Manual Document number TSD-19090601 Revision and date R13 24-Jan-2022 Disclosure Restriction Product status Corresponding content status Functional Sample Draft For functional testing. Revised and supplementary data will be published later. In Development / Objective Specification Target values.
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TOBY-L3 series - System Integration Manual Contents Contents...................................................................................................................................................... 3 1 System description ............................................................................................................................ 7 1.1 Overview .......................................................................................................................................
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TOBY-L3 series - System Integration Manual 1.14 Reserved pins (RSVD) ............................................................................................................................................................... 55 1.15 System features ........................................................................................................................................................................... 55 1.15.1 Network indication ..........................................................
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TOBY-L3 series - System Integration Manual 2.6.4 DDC (I2C) interfaces ..................................................................................................................................................... 102 2.6.5 SDIO interface ................................................................................................................................................................. 108 2.6.6 SGMII interface ..........................................................................
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TOBY-L3 series - System Integration Manual 3.3.6 Wave soldering .............................................................................................................................................................. 129 3.3.7 Hand soldering ............................................................................................................................................................... 129 3.3.8 Rework ..................................................................................
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TOBY-L3 series - System Integration Manual 1 System description 1.1 Overview The TOBY-L3 series modules support multi-band LTE-FDD, LTE-TDD, DC-HSPA+, and (E)GPRS radio access technologies in the very small TOBY 248-pin LGA form-factor (35.6 x 24.8 x 2.6 mm), which is easy to integrate in compact designs.
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TOBY-L3 series - System Integration Manual Table 1summarizes the main features and interfaces of the TOBY-L3 series modules. 1,3,7,8, 20, 1,8 28,38 APAC / TOBY-L3204-50A-00 South. American TOBY-L3404-50A-00 North.
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TOBY-L3 series - System Integration Manual 1,3,5, TOBY-L3904-50B-00 China / 8,18, India / 19,26,3 Japan 8,39,40 1,6, 900, 8,19 1800 4 1 1 2 1 8 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 4 1 1 2 1 8 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ,41 1,3,5,8, TOBY-L3904-50B-01 China 38, 39,40,4 1,8 900, 1800 1 Table 1: TOBY-L3 series main features summary TSD-19090601 - R13 System Integration Manual Page 9 of 143
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TOBY-L3 series - System Integration Manual TOBY-L3 series modules provide multi-band 4G / 3G / 2G multi-mode radio access technologies, based on the 3GPP Release 10 protocol stack, with main characteristics summarized in Table 2 and Table 3.
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TOBY-L3 series - System Integration Manual TOBY-L3904-50A-00 China / 1 (2100 MHz) 38 (2600 MHz) 1 (2100 MHz) E-GSM 900 TOBY-L3904-50B-00 India / 3 (1800 MHz) 39 (1900 MHz) 6 (800 MHz) DCS 1800 Japan 5 (850 MHz) 40 (2300 MHz) 8 (900 MHz) 8 (900 MHz) 41 (2500 MHz) 19 (850 MHz) 1 (2100 MHz) 38 (2600 MHz) 1 (2100 MHz) E-GSM 900 TOBY-L3904-50A-11 3 (1800 MHz) 39 (1900 MHz) 8 (900 MHz) DCS 1800 TOBY-L3904-50B-01 5 (850 MHz) 40 (2300 MHz) 8 (900 MHz) 41 (2500 MHz) 18 (850 MHz) 19 (
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TOBY-L3 series - System Integration Manual 1.2 Architecture Figure 1 summarizes the internal architecture of the TOBY-L3 series modules. PAs Duplexe r ANT1 Switch Antenna detection Filter s Filters 4 x UART USB 2.0 PAs Duplexe r Filters ANT2 Filter s Switch Filter s Filter s 1 x SPI SDIO RF Transceiver 2 x DDC (I2C) Memory SGMII Cellular Base-band Processor Filter s eMCC 1 x SIM Digital audio (I2S) 19.
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TOBY-L3 series - System Integration Manual  Power Amplifiers (PA) amplify the Tx signal modulated by the RF transceiver  RF switches connect the primary (ANT1) and secondary (ANT2) antenna ports to the suitable Tx / Rx path  SAW duplexers and band pass filters separate the Tx and Rx signal paths and provide RF filtering  19.2 MHz temperature-controlled crystal oscillator (TCXO) generates the clock reference in active mode or connected mode.
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TOBY-L3 series - System Integration Manual Function Pin Name Pin No I/O Description Remarks V_INT 5 O Generic digital V_INT = 1.8 V (typical) generated by internal DC/DC interfaces supply output regulator when the module is switched on. Test-Point for diagnostic access is recommended. See section 1.5.2 for functional description. See section 2.2.2 for external circuit design-in. System PWR_ON 20 I Power-on input The PWR_ON input is pulled up to an internal voltage (dVdd) minus a diode drop.
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TOBY-L3 series - System Integration Manual Function Pin Name Pin No I/O Description Remarks SIM_IO 57 I/O SIM data Data input/output for 1.8 V / 3 V SIM. Internal 4.7 k pull-up to VSIM. See section 1.8 for functional description. See section 2.5 for external circuit design-in. SIM_CLK 56 O SIM clock 3.9 MHz clock output for 1.8 V / 3 V SIM. See section 1.8 for functional description. See section 2.5 for external circuit design-in. SIM_RST 58 O SIM reset Reset output for 1.8 V / 3 V SIM.
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TOBY-L3 series - System Integration Manual Function Pin Name Pin No I/O Description Remarks TXD 16 I/ UART0 data input / 1.8 V input, Circuit 103 (TXD) in ITU-T V.24. I SPI1 Master Input Slave Alternatively configurable as SPI1 Master Input Slave Out. Output Internal active pull-up to V_INT. Test-Point for diagnostic access recommended. See section 1.9.2 for functional description. See section 2.6.2 for external circuit design-in. CTS 15 O/ UART0 clear to send 1.
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TOBY-L3 series - System Integration Manual Function Pin Name Pin No I/O Description Remarks UART2 RXD2 162 O UART2 data output, 1.8 V output, Circuit 104 (RXD) in ITU-T V.24. Used only for coexistence between LTE and WIFI. See section 1.9.2.3 for functional description. See section 2.6.2 for external circuit design-in. TXD2 161 I UART2 data input 1.8 V input, Circuit 103 (TXD) in ITU-T V.24. Internal active pull-up to V_INT. Used only for coexistence between LTE and WIFI See section 1.9.2.
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TOBY-L3 series - System Integration Manual Function Pin Name Pin No I/O Description Remarks I2C1 SCL1 203 O I2C1 clock 1.8 V open drain. External pull-up required. See section 1.9.4 for functional description. See section 2.6.4 for external circuit design-in. SDA1 204 I/O I2C1 data 1.8 V open drain. External pull-up required. See section 1.9.4 for functional description. See section 2.6.4 for external circuit design-in.
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TOBY-L3 series - System Integration Manual Function Pin Name Pin No I/O Description Remarks ETH_INTR 220 I Ethernet Interrupt Input Input for the detection of an interrupt event in the PHY. See section 1.9.6 for functional description. See section 2.6.6 for external circuit design-in. ETH_MDIO 222 I/O Ethernet Management Ethernet management data input / output. Data Input Output See section 1.9.6 for functional description. See section 2.6.6 for external circuit design-in.
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TOBY-L3 series - System Integration Manual Function Pin Name Pin No I/O Description Remarks I2S_RXD 53 I/ I2S0 receive data / I2S (I2S0) receive data input. I PCM0 data in Alternatively configurable as PCM0 data in by Open CPU or AT Command. See sections 1.11 for functional description. See sections 2.8 for external circuit design-in. I2S_CLK 52 I/O I2S0 clock / I2S (I2S0) serial clock. / PCM0 clock Alternatively configurable as PCM0 clock by Open CPU or AT I/O Command.
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TOBY-L3 series - System Integration Manual Function Pin Name Pin No I/O Description Remarks GPIO7 248 I/O GPIO 1.8 V GPIO with alternatively configurable functions. See section 1.13 for functional description. See section 2.10 for external circuit design-in. GPIO8 247 I/O GPIO 1.8 V GPIO with alternatively configurable functions. See section 1.13 for functional description. See section 2.10 for external circuit design-in.
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TOBY-L3 series - System Integration Manual 1.4 Operating modes TOBY-L3 series modules have several operating modes. The operating modes are defined in Table 5 and described in detail in Table 6, provding general guidelines for operation. General Status Operating Mode Definition Power-down Not-Powered Mode VCC supply not present and the module is switched off. Power-Off mode VCC supply within operating range and modules is switched off.
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TOBY-L3 series - System Integration Manual The modules switch from active mode to download mode before starting the firmware downloading procedure, once the firmware downloading is finished, the system reboot and enter booting mode. Sleep-Mode Module is switched on with application The modules automatically switch from active-mode to low power interfaces temporarily disabled or sleep-mode whenever possible if power saving is enabled.
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TOBY-L3 series - System Integration Manual Not powered Apply VCC power supply Remove VCC power supply Switch ON with the Pin TX2 pull up to high Power off Switch ON: 1). PWR_ON Switch OFF: 1). AT+CPWROFF 2). RESET_N (hardware reset) 3).
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TOBY-L3 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.
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TOBY-L3 series - System Integration Manual functional until the VCC voltage is inside the extended operating range limits. VCC average current Support with adequate margin the The maximum average current consumption can be greater than highest averaged VCC current the specified value according to the actual antenna mismatching, consumption value in connected mode temperature and supply voltage. conditions Sections 1.5.1.2, 1.5.1.3 and 1.5.1.
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TOBY-L3 series - System Integration Manual Figure 4 shows an example of the module current consumption profile versus time in 2G single-slot mode. Current [A] 2.5 1900 m A 2.0 1.5 Peak current depends on TX power and act ual ant enna load 1.0 0.5 200 m A 60-120 m A 60-120 m A 10-40 m A 0.0 RX slot unused unused slot slot TX slot unused unused M ON unused slot slot slot slot RX slot unused unused slot slot GSM f ram e 4.
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TOBY-L3 series - System Integration Manual Figure 6 reports the current consumption profiles in GPRS class 12 connected mode, in the 850 or 900 MHz bands, with 4 slots used to transmit and 1 slot used to receive. It must be noted that the actual current consumption of the module in 2G connected mode depends also on the specific concurrent activities performed by the integrated CPU, beside the actual Tx power and antenna load. Current [A] 2.5 1600 m A 2.0 1.
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TOBY-L3 series - System Integration Manual It must be noted that the actual current consumption of the module in 3G connected mode depends also on the specific concurrent activities performed by the integrated CPU, beside the actual Tx power and antenna load.
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TOBY-L3 series - System Integration Manual It must be noted that the actual current consumption of the module in LTE connected mode depends also on the specific concurrent activities performed by the integrated CPU, beside the actual Tx power and antenna load. Current [mA] 90 0 80 0 70 0 60 0 Current consum pt ion value depends on TX power and act ual ant enna load 50 0 40 0 30 0 20 0 10 0 0 1 Slot 1 Resource Block (0.
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TOBY-L3 series - System Integration Manual  In LTE, the paging period can vary from 320 ms (DRX = 5, i.e. length of 2 5 LTE frames = 32 x 10 ms) up to 2560 ms (DRX = 8, length of 28 LTE frames = 256 x 10 ms). Figure 9 illustrates a typical example of the module current consumption profile when power saving is enabled. The module is registered with the 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.
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TOBY-L3 series - System Integration Manual Current [mA] 20 0 10 0 0 Current [mA] Time [s] Paging period 2G case: 0 .44-2.0 9 s 3G case: 0 .61-5.0 9 s LTE case: 0 .32-2.56 s 20 0 10 0 0 Time [ms] RX Enabled ACTIVE M ODE Figure 10: VCC current consumption profile with low power mode disabled and module registered with the network: active mode is always held and the receiver is periodically activated to monitor the paging channel for paging block reception 1.5.
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TOBY-L3 series - System Integration Manual 1.6 System function interfaces 1.6.1 Module power-on TOBY-L3 series modules can be switched on in the following way:  Low pulse on the PWR_ON pin, which is normally set high by an internal pull-up, for a valid time period, when the applied VCC voltage is stable at its nominal value within normal operating range. As shown in Figure 12, the TOBY-L3 series PWR_ON input is equipped with an internal active pull-up resistor to an internal 1.
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TOBY-L3 series - System Integration Manual Figure 13 shows the module power-on sequence, describing the following phases:  The VCC module supply is stable at its nominal value within the normal operating range  The PWR_ON input pin is set low for a valid time period, representing the switch-on event.
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TOBY-L3 series - System Integration Manual ☞ The duration of the TOBY-L3 series modules’ switch-on routine can largely vary depending on the application / network settings and any concurrent module activities. ⚠ It is highly recommended to avoid an abrupt removal of the VCC supply and/or performing an abrupt emergency shutdown procedure during TOBY-L3 series modules’ switch-on routine. 1.6.
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TOBY-L3 series - System Integration Manual Figure 14 describes the TOBY-L3 series modules’ proper normal switch-off sequence started by means of the +CPWROFF AT command, allowing storage of current parameter settings in module’s non-volatile memory and a clean network detach, with the following phases  The +CPWROFF AT command is sent to the module by the external application: the module starts the switch-off routine  Then, the module replies OK on the AT interface: the switch-off routine is in progress 
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TOBY-L3 series - System Integration Manual Figure 15 describes the TOBY-L3 series modules’ proper normal 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 clean network detach, with the following phases  A low pulse with the appropriate time duration is applied at the PWR_ON input (see TOBY-L3 series Data Sheet [1], normal graceful switch-off), which is normally set high by an internal pull-up: the module s
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TOBY-L3 series - System Integration Manual  +CFUN AT command (see the TOBY-L3 series AT Commands Manual [2])  reboot command on the Linux shell4 The methods listed above represent appropriate reset (reboot) events, triggering an appropriate “internal” or “software” reset of the module: the current parameter settings are saved in the module’s non-volatile memory and a clean network detach is performed.
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TOBY-L3 series - System Integration Manual 1.7 Antenna interfaces 1.7.1 Antenna RF interfaces (ANT1 / ANT2) TOBY-L3 series modules provide two RF interfaces for connecting the external antennas for 4G/3G/2G network:  ANT1 represents the primary RF input/output for transmission and reception of RF signals. ANT1 pin has a nominal characteristic impedance of 50  and must be connected to the primary Tx / Rx antenna through a 50  transmission line to allow clean RF transmission and reception.
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TOBY-L3 series - System Integration Manual Item Requirements Remarks Radiated Power (TRP) and the Total Isotropic Sensitivity (TIS), specified by applicable related certification schemes. Maximum Gain According to radiation exposure The power gain of an antenna is the radiation efficiency multiplied by the limits directivity: the gain describes how much power is transmitted in the direction of peak radiation to that of an isotropic source.
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TOBY-L3 series - System Integration Manual The radiation efficiency of the secondary antenna needs to be roughly the same as the radiation efficiency of the primary antenna for good RF performance. Envelope < 0.4 recommended The Envelope Correlation Coefficient (ECC) between the primary (ANT1) Correlation < 0.
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TOBY-L3 series - System Integration Manual High-speed SIM/ME interface and the PPS procedure for baud-rate selection is implemented according to the values proposed by the SIM card/chip. The VSIM supply output provide internal short circuit protection to limit the start-up current and protect the SIM from short circuits. 1.8.2 SIM detection interface The GPIO5 pin of TOBY-L3 series modules can be configured to detect the mechanical / physical presence of an external SIM card connected to the SIM interface.
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TOBY-L3 series - System Integration Manual  UART interfaces (see section 1.9.2): o UART0 interface, providing:  Can be configured as SPI (SPI1) interface by open CPU API or AT commands alternatively.  Communication with external serial devices by means of open CPU API or AT commands. o UART1 interface, providing:  Can be configured as I2S (I2S1), PCM (PCM1) or SPI (SPI2) interface by open CPU API or AT commands alternatively.
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TOBY-L3 series - System Integration Manual The USB High-Speed 2.0 compliant interface consists of the following pins:  USB_D+/USB_D–, USB High-Speed differential data lines as per USB 2.0 specification [4]  VUSB_DET input pin, which senses the VBUS rail presence (nominally 5 V at the source) to detect the host connection and enable the USB 2.0 interface with the module acting as a USB device.
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TOBY-L3 series - System Integration Manual  Ring Indicator functionality, over the following pin: o RI module output line The UART0 interface can operate at 4.8kbit/s, 9.6kbit/s, 19.2kbit/s, 38.4kbit/s, 57.6kbit/s, 115.2kbit/s, 230.4kbit/s, 1Mbit/s, 3Mbit/s, 4Mbit/s baud rates, with 8N1 frame format (illustrated in Figure 17), and with hardware flow control output (CTS line) driven to the OFF state when the module is not prepared to accept data by the UART0 interface.
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TOBY-L3 series - System Integration Manual The RI line can notify an incoming call: the line is switched from the OFF state to the ON state with a 4:1 duty cycle and a 5 s period (ON for 1 s, OFF for 4 s, see Figure 18), until the DTE attached to the module sends the ATA string and the module accepts the incoming data call. The RING string sent by the module (DCE) to the serial port at constant time intervals is not correlated with the switch of the Ring Indicator line to the ON state.
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TOBY-L3 series - System Integration Manual 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 illustrated in Figure 19. The RI function can be alternatively configured by GPIO by an AT command. 120ms RI OFF RI ON 0 time [s] Wake up host Figure 20: RI behavior at wake up host in mode 2 As described in Figure 20, the RI line can wake up the external host after configured the pin as mode 2 by AT command.
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TOBY-L3 series - System Integration Manual The UART1 interface can be alternatively, in mutually exclusive way, configured as SPI (SPI2), I2S (I2S1) or PCM (PCM1) interface by means of open CPU API or AT command (see the TOBY-L3 series AT Commands Manual [2]), for communication with external devices with the following configuration Table 13: 4-wire UART Mode (UART1) SPI Mode (SPI2) I2S Mode (I2S1) PCM Mode (PCM1) RXD1 (Module output); SPI2_MOSI; I2S1_WA; PCM1_SYNC; UART1 Receive Data SPI2 MOSI Pin
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TOBY-L3 series - System Integration Manual 1.9.3 SPI interfaces 1.9.3.1 SPI0 interface The SPI0 1.
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TOBY-L3 series - System Integration Manual dedicated DDC (I C) interface. An interface connected to the positioning device is not necessary: the cellular 2 module allows full control of the GNSS device. The modules provide embedded GNSS aiding that is a set of specific features developed by u-blox to improve the cellular / GNSS system power consumption and the GNSS performance, decreasing the TimeTo-First-Fix (TTFF), thus allowing to calculate the position in shorter time with higher accuracy.
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TOBY-L3 series - System Integration Manual Tashang has implemented special features in the cellular modules to ease the design effort for the integration of the TOBY-L3 cellular module with a u-blox short range radio communication module, to provide Router functionality. The cellular modules provide additional custom functions over GPIO pins to improve the integration with u-blox short range radio communication modules (see section 1.13).
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TOBY-L3 series - System Integration Manual 1.10 eMMC interface TOBY-L3 series modules include a 4-bit embedded Multi-Media Card interface compliant with the JESD84B451 Embedded Multimedia Card (eMMC) Electrical Standard 4.51 [9].
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TOBY-L3 series - System Integration Manual 1.
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TOBY-L3 series - System Integration Manual The modules support I S transmit and I S receive data 16-bit words long, linear. Data is transmitted and 2 2 read in 2’s complement notation. The MSB is transmitted and read first. I2S clock signal frequency depends on the frame length, the sample rate and the selected mode of operation:  17 x or 18 x in PCM mode (short synchronization signal)  16 x 2 x in Normal I2S mode (long synchronization signal) 1.
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TOBY-L3 series - System Integration Manual Function Description Default Configurable GPIOs Wake-up Wi-Fi Wake-up the Wi-Fi module from sleep mode GPIO1 GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, GPIO6, GPIO7, GPIO8, HOST_SELECT0, HOST_SELECT1, RI WWAN Status Indicator the status of WWAN.
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TOBY-L3 series - System Integration Manual  Network searching  Registered the network  Data transfer is on going  Voice call is on going Mode Output Status Remarks Mode 1 Mode 2 Mode 3 Mode 4 Network indication function is disabled. (Default configuration mode) Blink slowly (200ms High/1800ms Low) Network is on searching. Blink slowly (1800ms High/200ms Low) The module has registered on the network and work in idle state.
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TOBY-L3 series - System Integration Manual  Bridge mode: In bridge mode the module acts as a cellular modem dongle connected to the host over serial interface. The IP termination of the network is placed on the host IP stack. The module is configured as a bridge which means the network IP address is assigned to the host (host IP termination).
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TOBY-L3 series - System Integration Manual For more details about the embedded FTP and FTPS functionalities, see the TOBY-L3 series AT commands manual [2]. 1.15.
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TOBY-L3 series - System Integration Manual  The +UFWUPD AT command triggers a reboot followed by the upgrade procedure at specified a baud rate.  A special boot loader on the module performs firmware installation, security verifications and module reboot.  Firmware authenticity verification is performed via a security signature during the download. The firmware is then installed, overwriting the current version.
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TOBY-L3 series - System Integration Manual  The GNSS data ready pin trigger the interruption  Other interruption pin have the interrupt input signal For the definition and the description of TOBY-L3 series modules operating modes, including the events forcing transitions between the different operating modes.
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TOBY-L3 series - System Integration Manual 2 Design-in 2.1 Overview For optimal integration of the modules in the application PCB, follow the design guidelines stated in this section. Every application circuit must be properly designed to guarantee the correct functionality of the relative interface, but a number of points require greater attention during the design of the application device. The following list provides a rank of importance in the application design, starting with the most significant: 1.
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TOBY-L3 series - System Integration Manual 9. Other digital interfaces: (UART, SPI, I2C, I2S, Host Select, GPIOs, and Reserved pins). Accurate design is required to guarantee correct functionality and reduce the risk of digital data frequency harmonics coupling. Follow the suggestions provided in sections 2.6.1, 2.6.3, 2.6.4, 2.3.3, 2.10, 2.11. 10. Other supplies: V_INT is generic digital interface supply. Correct design is required to guarantee functionality. Follow the suggestions provided in 2.2.2.
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TOBY-L3 series - System Integration Manual Main Supply Available? No, portable device Battery Li-Ion 3.7 V Yes, always available Main Supply Voltage > 4.2V? No, less than 4.2 V Linear LDO Regulator Yes, greater than 4.2 V Switching StepDown Regulator Figure 21: VCC supply concept selection The switching step-down regulator is the typical choice when the available primary supply source has a nominal voltage much higher (e.g. greater than 4.2 V) than the operating supply voltage of TOBY-L3 series.
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TOBY-L3 series - System Integration Manual The usage of more than one DC supply at the same time should be evaluated carefully: depending on the supply source characteristics, different DC supply systems can result as mutually exclusive. The usage of a regulator or a battery not able to support the highest peak of VCC current consumption specified in the TOBY-L3 series Data Sheet [1] is generally not recommended.
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TOBY-L3 series - System Integration Manual Figure 22 and Table 18 show an example of a high reliability power supply circuit, where the module VCC input is supplied by a step-down switching regulator capable of delivering maximum current with low output ripple and with fixed switching frequency in PWM mode operation greater than 1 MHz.
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TOBY-L3 series - System Integration Manual 2.2.1.3 Guidelines for VCC supply circuit design using a LDO linear regulator The use of a linear regulator is suggested when the difference from the available supply rail source and the VCC value is low. The linear regulators provide high efficiency when transforming a 5 VDC supply to a voltage value within the module VCC normal operating range.
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TOBY-L3 series - System Integration Manual R3 3.9 k Resistor 0402 5% 0.1 W RC0402JR-073K9L - Yageo Phycomp U1 LDO Linear Regulator ADJ 3.0 A LT1764AEQ#PBF - Linear Technology Table 19: Components for high reliability VCC supply application circuit using an LDO linear regulator ☞ See section 2.2.1.6, in particular Figure 24 / Table 20, for the additional parts recommended for noisesensitive applications and/or for applications with antenna(s) placed close to the module. 2.2.1.
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TOBY-L3 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 supply lines (connected to modules’ VCC and GND pins) on the application board and battery pack should also be considered and minimized: cabling and routing must be as short as possible to minimize losses. Three pins are allocated to the VCC supply. Several pins are designated for GND connection.
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TOBY-L3 series - System Integration Manual Table 20: Suggested components to reduce ripple / noise on the VCC ☞ The necessity of each part depends on the specific design, but it is recommended to provide all the bypass capacitors illustrated in Figure 24 / Table 20 for noise-sensitive applications and/or if the enddevice integrates an internal antenna. ☞ The ESD sensitivity rating of the VCC supply pins is 1 kV (HBM as per JESD22-A114).
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TOBY-L3 series - System Integration Manual Li-Ion/Li-Polymer Battery Charger IC TOBY-L3 series 5V0 USB Supply VIN VOUT 70 VCC 71 VCC 72 VCC VINSNS VOSNS MODE R1 R2 R3 Li-Ion/Li-Pol Battery Pack VREF ISEL C3 IUSB IAC R4 C4 TH + θ IEND C5 C6 C7 C8 C9 TPRG SD C1 B1 GND C2 U1 GND D1 D2 Figure 25: Li-Ion (or Li-Polymer) battery charging application circuit Reference Description Part Number - Manufacturer B1 Li-Ion (or Li-Polymer) battery pack with 470  NTC Various manufacturer C1,
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TOBY-L3 series - System Integration Manual A power management IC should meet the following prerequisites to comply with the module’s VCC requirements as summarized in Table 7:  High efficiency internal step down converter, compliant with features specified in section 2.2.1.
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TOBY-L3 series - System Integration Manual  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.  Constant voltage: when the battery voltage reaches the regulated output voltage (4.
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TOBY-L3 series - System Integration Manual D1, D2 Low Capacitance ESD Protection CG0402MLE-18G - Bourns D3 Schottky Diode 40 V 3 A MBRA340T3G - ON Semiconductor R1, R3, R5, R7 10 k Resistor 0402 1% 1/16 W Generic manufacturer R2 1.05 k Resistor 0402 1% 0.1 W Generic manufacturer R4 22 k Resistor 0402 1% 1/16 W Generic manufacturer R6 26.5 k Resistor 0402 1% 1/16 W Generic manufacturer L1 2.2 µH Inductor 7.
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TOBY-L3 series - System Integration Manual Reference Description Part Number - Manufacturer R1 47 k Resistor 0402 5% 0.1 W RC0402JR-0747KL - Yageo Phycomp R2 10 k Resistor 0402 5% 0.1 W RC0402JR-0710KL - Yageo Phycomp R3 100 k Resistor 0402 5% 0.1 W RC0402JR-07100KL - Yageo Phycomp T1 P-Channel MOSFET Low On-Resistance AO3415 - Alpha & Omega Semiconductor Inc. T2 NPN BJT Transistor BC847 - Infineon C1 330 µF Capacitor Tantalum D_SIZE 6.
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TOBY-L3 series - System Integration Manual noise rejection in the band centered on the Self-Resonant Frequency of the pF capacitors. This is highly recommended if the application device integrates an internal antenna.  Since VCC input provides the supply to the RF Power Amplifiers, any voltage ripple at high frequency may result in unwanted spurious modulation of the transmitter RF signal.
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TOBY-L3 series - System Integration Manual  Pull-up SIM detection signal (see section 2.5 for more details)  Supply voltage translators to connect 1.8 V module generic digital interfaces to 3.0 V devices (e.g. see section 2.6.1 for more details)  Pull-up DDC (I2C) interface signals (see section 2.6.4 for more details)  Supply a 1.8 V u-blox GNSS device (see section 2.6.
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TOBY-L3 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 TOBY-L3 series PWR_ON input is equipped with an internal active pull-up resistor to an internal 1.3 V supply rail as shown in Figure 29: 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.
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TOBY-L3 series - System Integration Manual 2.3.1.2 Guidelines for PWR_ON layout design The power-on circuit (PWR_ON) requires careful layout since it is the sensitive input available to switch on the TOBY-L3 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. 2.3.2 Module reset (RESET_N) 2.3.2.
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TOBY-L3 series - System Integration Manual ☞ If the external reset function is not required by the customer application, the RESET_N pin can be left unconnected to external components, but it is recommended to provide direct access on the application board by means of an accessible test point directly connected to the RESET_N pin. 2.3.2.
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TOBY-L3 series - System Integration Manual 2.4 Antenna interface TOBY-L3 series modules provide two RF interfaces for connecting the external antennas:  The ANT1 pin represents the primary RF input/output for RF signals transmission and reception.  The ANT2 pin represents the secondary RF input for MIMO and Rx diversity RF signals reception.
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TOBY-L3 series - System Integration Manual can be radiated. Therefore, the ground plane can be reduced down to a minimum size that should be similar to the quarter of the wavelength of the minimum frequency that must be radiated, given that the orientation of the ground plane relative to the antenna element must be considered.
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TOBY-L3 series - System Integration Manual Correct transition between ANT1 / ANT2 pads and application board must be provided, implementing the following design-in guidelines for the application PCB layout close to the ANT1 / ANT2 pads:  On a multilayer board, the whole layer stack below the RF connection should be free of digital lines.  Increase GND keep-out (i.e.
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TOBY-L3 series - System Integration Manual 5 0 0 um 3 8 0 um 5 0 0 um L1 Copper 3 5 um FR-4 dielect ric 270 um L2 Copper 3 5 um FR-4 dielect ric 760 um L3 Copper 3 5 um FR-4 dielect ric 270 um L4 Copper 3 5 um Figure 32: Example of a 50  coplanar waveguide transmission line design for the described 4-layer board layup 40 0 um 120 0 um 40 0 um L1 Copper 3 5 um FR-4 dielect ric 15 10 um L2 Copper 3 5 um Figure 33: Example of a 50  coplanar waveguide transmission line design for the desc
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TOBY-L3 series - System Integration Manual Additionally to the 50  impedance, the following guidelines are recommended for transmission line design:  Minimize the transmission line length: the insertion loss should be minimized as much as possible, in the order of a few tenths of a dB.  Add GND keep-out (i.e.
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TOBY-L3 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  load on all the supported frequency bands.
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TOBY-L3 series - System Integration Manual  Place the antennas far from sensitive analog systems or employ countermeasures to reduce EMC issues.  Take care of interaction between co-located RF systems since the LTE/3G/2G transmitted power may interact or disturb the performance of companion systems.
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TOBY-L3 series - System Integration Manual 120.2 x 50.4 mm Taoglas FXUB70.A.07.C.001 GSM / WCDMA / LTE PCB MIMO Antenna with cables and U.FL 698..960 MHz, 1575.42 MHz, 1710..2170 MHz, 2400..2690 MHz 182.2 x 21.2 mm EAD FSQS35241-UF-10 SQ7 GSM / WCDMA / LTE PCB Antenna with cable and U.FL 690..960 MHz, 1710..2170 MHz, 2500..2700 MHz 110.0 x 21.0 mm Ethertronics 5001537 Prestta GSM / WCDMA / LTE PCB Antenna with cable 704..960 MHz, 1710..2170 MHz, 2300..2400 MHz, 2500..2690 MHz 80.0 x 18.
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TOBY-L3 series - System Integration Manual 2.4.2 Antenna detection interface (ANT_DET) 2.4.2.1 Guidelines for ANT_DET circuit design Figure 35 and Table 29 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.
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TOBY-L3 series - System Integration Manual  Additional components (R1, C1 and D1 in Figure 35) are needed at the ANT_DET pin as ESD protection.  The ANT1 / ANT2 pins must be connected to the antenna connector by means of a transmission line with a nominal characteristic impedance as close as possible to 50 . The DC impedance at the RF port for some antennas may be a DC open (e.g. linear monopole) or a DC short to reference GND (e.g. PIFA antenna).
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TOBY-L3 series - System Integration Manual 2.4.2.2 Guidelines for ANT_DET layout design The recommended layout for the primary antenna detection circuit to be provided on the application board to achieve the primary antenna detection functionality, implementing the recommended schematic illustrated in Figure 35 and Table 29, is explained here:  The ANT1 / ANT2 pins must be connected to the antenna connector by means of a 50  transmission line, implementing the design guidelines described in section 2.
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TOBY-L3 series - System Integration Manual Removable SIM cards are suitable for applications requiring a change of SIM card during the product’s lifetime. A SIM card holder can have 6 or 8 positions if a mechanical card presence detector is not provided, or it can have 6+2 or 8+2 positions if two additional pins relative to the normally-open mechanical switch integrated in the SIM connector for the mechanical card presence detection are provided.
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TOBY-L3 series - System Integration Manual  Provide a very low capacitance (i.e. less than 10 pF) ESD protection (e.g. Tyco PESD0402-140) on each externally accessible SIM line, close to each relative pad of the SIM connector. The ESD sensitivity rating of the SIM interface pins is 1 kV (HBM). So that, according to EMC/ESD requirements of the custom application, a higher protection level can be required if the lines are externally accessible on the application device.
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TOBY-L3 series - System Integration Manual  Provide a 100 nF bypass capacitor (e.g. Murata GRM155R71C104K) at the SIM supply line close to the relative pad of the SIM chip, to prevent digital noise.  Provide a bypass capacitor of about 22 pF to 47 pF (e.g. Murata GRM1555C1H470J) on each SIM line, to prevent RF coupling especially when the RF antenna is placed closer than 10 - 30 cm from the SIM lines.
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TOBY-L3 series - System Integration Manual Guidelines for single SIM card connection with detection If the optional SIM card detection feature is required by the application, then a removable SIM card placed in a SIM card holder must be connected to the SIM0 interface of TOBY-L3 series modules as shown in Figure 38: Follow these guidelines to connect the module to a SIM connector implementing SIM detection:  Connect the UICC / SIM contact C1 (VCC) to the VSIM pin of the module.
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TOBY-L3 series - System Integration Manual SIM CARD HOLDER TOBY-L3 series V_INT 5 TP SW1 R1 SW2 GPIO5 60 R2 VSIM 59 VPP (C6) VCC (C1) SIM_IO 57 C C C C 5 6 7 8 IO (C7) SIM_CLK 56 CLK (C3) SIM_RST 58 RST (C2) GND (C5) C1 C2 C3 C4 C5 C C C C 1 2 3 4 SIM Card Bottom View (contacts side) D1 D2 D3 D4 D5 D6 J1 Figure 38: Application circuit for the connection to a single removable SIM card, with SIM detection implemented Reference Description Part Number - Manufacturer C1, C2, C3, C4 47 pF C
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TOBY-L3 series - System Integration Manual 2.6 Data communication interfaces 2.6.1 USB interface 2.6.1.1 Guidelines for USB circuit design  USB 2.0 interface, with the module acting as USB device, as shown in Figure 39 and Table 33  USB 2.0 interface, with the module acting as USB host, as shown in Figure 40 and Table 34 USB pull-up or pull-down resistors and external series resistors on the USB_D+ and USB_D– lines as required by the USB 2.
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TOBY-L3 series - System Integration Manual USB 2.0 HOST CONNECTOR 5V VBUS VCC Boost OUT IN 4 U1 D+ TOBY-L3 series D– USB 2.0 DEVICE PROCESSOR VUSB_DET VBUS 28 USB_D+ D+ 27 USB_D– D– 168 USB_ID D1 D2 D3 C1 GND IN U1 C1 C2 GND OUT TOBY-L3 series VCC Boost 5V 4 VUSB_DET 28 USB_D+ 27 USB_D– 168 USB_ID C2 GND GND Figure 40: USB 2.
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TOBY-L3 series - System Integration Manual 40 0 um 3 5 0 um 40 0 um 3 5 0 um 40 0 um L1 Copper 3 5 um FR-4 dielectric 270 um L2 Copper 3 5 um FR-4 dielect ric 760 um L3 Copper 3 5 um FR-4 dielect ric L4 Copper 270 um 3 5 um Figure 41: Example of USB line design, with Z0 close to 90  and ZCM close to 30 , for the described 4-layer board layup 410 um 740 um 410 um 740 um 410 um L1 Copper 3 5 um FR-4 dielectric 15 10 um L2 Copper 3 5 um Figure 42: Example of USB line design, with Z0 close
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TOBY-L3 series - System Integration Manual 3V Processor / Device Unidirectional Voltage Translator 3V0 VCC C1 VCCA DIR1 DIR3 TOBY-L3 series 1V8 TP VCCB 5 V_INT C2 0 Ohm TP TxD A1 B1 RxD A2 B2 RTS A3 B3 RTSx CTS A4 B4 CTSx GND DIR2 DIR4 0 Ohm TP OE GND TXDx RXDx GND U1 Figure 44: 4-wire UART interface application circuit to connect an external 3.
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TOBY-L3 series - System Integration Manual 3V Processor / Device TOBY-L3 series Unidirectional Voltage Translator 3V0 VCC VCCA C1 TP VCCB 5 V_INT C2 DIR1 TxD A1 B1 RxD A2 B2 GND 1V8 0 Ohm TP 0 Ohm TP OE GND DIR2 TXDx RXDx GND U1 Figure 46: 2-wire UART interface application circuit to connect an external 3.
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TOBY-L3 series - System Integration Manual 3V Processor / Device Unidirectional Voltage Translator 3V0 VCC RI GND TOBY-L3 series 1V8 TP VCCB VCCA C1 5 V_INT C2 A1 B1 A2 B2 DIR1 DIR2 11 RI OE GND GND U1 Figure 48: Ring Indicator(Configured by GPIO8) application circuit to connect an external 3.
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TOBY-L3 series - System Integration Manual Figure 49 describes a possible application circuit for the SPI0 interface, where two SPI slave devices are connected to the module using the two SPI0 Chip Select 0 (SPI_CS pin) to select the specific SPI slave device. The external SPI slave device must provide compatible voltage levels (1.80 V typ.), otherwise it is recommended to connect the 1.8 V SPI interface of the module to the external 3.
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TOBY-L3 series - System Integration Manual ☞ Connect the DDC (I2C) pull-ups to the V_INT 1.8 V supply source, or another 1.8 V supply source enabled after V_INT (e.g., as the GNSS 1.8 V supply present in Figure 51 application circuit), as any external signal connected to the DDC (I2C) interface must not be set high before the switch-on of the V_INT supply of DDC (I2C) pins, to avoid latch-up of circuits and allow a clean boot of the module.
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TOBY-L3 series - System Integration Manual ☞ If the pins are not used as DDC (I2C) bus interface, they can be left unconnected. Connection with u-blox 1.8 V GNSS devices Figure 51 shows an application circuit for connecting the cellular modules to a u-blox 1.8 V GNSS device.  SDA / SCL pins of the cellular module are directly connected to the relative I 2C pins of the u-blox 1.8 V GNSS device, with appropriate pull-up resistors connected to the 1.
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TOBY-L3 series - System Integration Manual Table 39: Components for connecting TOBY-L3 series modules to u-blox 1.8 V GNSS devices Figure 52 illustrates an alternative application circuit solution in which the cellular module supplies a u-blox 1.8 V GNSS device. The V_INT 1.8 V regulated supply output of the cellular module can be used as supply source for a u-blox 1.8 V GNSS device instead of using an external voltage regulator, as shown in Figure 51.
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TOBY-L3 series - System Integration Manual R5 100 k Resistor 0402 5% 0.1 W RC0402JR-07100KL - Yageo Phycomp T1 P-Channel MOSFET Low On-Resistance IRLML6401 - International Rectifier or NTZS3151P - ON Semi T2 NPN BJT Transistor BC847 - Infineon C1 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C104KA01 - Murata Table 40: Components for connecting TOBY-L3 series modules to u-blox 1.8 V GNSS devices using V_INT as supply Connection with u-blox 3.
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TOBY-L3 series - System Integration Manual u-blox GNSS 3.
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TOBY-L3 series - System Integration Manual 2.6.5 SDIO interface 2.6.5.
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TOBY-L3 series - System Integration Manual  All GND pins of the cellular module and the u-blox JODY-W2 Wi-Fi module are connected to ground.  All the other pins of the u-blox JODY-W2 Wi-Fi module are intended to be not connected.
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TOBY-L3 series - System Integration Manual SDIO pins of the SDIO device, with appropriate low value series damping resistors to avoid reflections and other losses in signal integrity, which may create ringing and loss of a square wave shape. The most appropriate value for the series damping resistors on the SDIO lines depends on the specific line lengths and layout implemented.
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TOBY-L3 series - System Integration Manual Consider the usage of low value series damping resistors to avoid reflections and other losses in signal integrity, which may create ringing and loss of a square wave shape. 2.6.6 SGMII interface 2.6.6.1 Guidelines for SGMII circuit design TOBY-L3 series modules include an Ethernet Media Access Control (MAC) block supporting up to 1 Gbit/s data rate via a Serial Gigabit Media-Independent Interface compliant with the SGMII Version 1.8 specification [8].
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TOBY-L3 series - System Integration Manual Consider the usage of low value series damping resistors to avoid reflections and other losses in signal integrity, which may create ringing and loss of a square wave shape. 2.7 eMMC interface ☞ The eMMC interface is not supported by the "0x" product feature versions. 2.7.1 Guidelines for eMMC circuit design TOBY-L3 series modules include a 4-bit embedded Multi-Media Card interface compliant with JESD84-B451 Embedded Multimedia Card (eMMC) Electrical Standard 4.
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TOBY-L3 series - System Integration Manual 2.8 Digital Audio interface 2.8.1 Guidelines for digital audio circuit design I2S digital audio interfaces can be connected to external digital audio devices for voice applications.
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TOBY-L3 series - System Integration Manual  1.8 V audio device with slave role connected to a digital audio interface of the module set as master  1.8 V audio device with master role connected to a digital audio interface of the module set as slave  3.0 V audio device with slave role connected to a digital audio interface of the module set as master  3.
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TOBY-L3 series - System Integration Manual  The module’s PCM interface (mast mode) is connected to the related pins of the external audio codec (slave mode).  The external audio codec is controlled by the TOBY-L3 series module using the DDC (I2C) interfaces (I2C_SDA1, I2C_SCL1) which can be configured through AT command. For more details, see the TOBYL3 series AT Commands Manual [2].
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TOBY-L3 series - System Integration Manual R2,R3 2.2 k Resistor 0402 0.1% 62.5 mW RN73R1ETP2201B25 - KOA D1,D2 Low Capacitance ESD Protection USB0002RP or USB0002DP – AVX U1 LDO Linear Regulator 1.8 V 0.3 A LT1962EMS8-1.
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TOBY-L3 series - System Integration Manual ☞ The ESD sensitivity rating of ADC pins is 1 kV (HBM according to JESD22-A114). Higher protection level could be required if the lines are externally accessible and it can be achieved by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor array) close to the accessible points. ☞ If the ADC pins are not used, they can be left unconnected on the application board. 2.9.
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TOBY-L3 series - System Integration Manual 2.10.2 Guidelines for general purpose input/output layout design The general purpose inputs / outputs pins are generally not critical for layout. 2.11 Reserved pins (RSVD) TOBY-L3 series modules have pins reserved for future use, marked as RSVD. All the RSVD pins are to be left unconnected on the application board. 2.12 Module placement An optimized placement allows a minimum RF line’s length and a closer path from the DC source for VCC.
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TOBY-L3 series - System Integration Manual 2.13 Module footprint and paste mask Figure 59 and Table 46 describe the suggested footprint (i.e. copper mask) and the paste mask (i.e. stencil) layout for TOBY-L3 series modules, to be implemented on the application PCB. The proposed land pattern layout (i.e. the footprint, the application board top-layer copper mask) reflects the modules’ pads layout, with the pads on the application board designed as the LGA pads of the module.
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TOBY-L3 series - System Integration Manual  Light-Blue marked pads: Paste layout reduced circumferentially 0.1 mm to Copper layout The recommended solder paste (i.e. stencil) thickness is 150 µm, according to application production process requirements. ☞ These are recommendations only and not specifications. The exact mask geometries, distances and stencil thicknesses must be adapted to the specific production processes of the customer. 2.
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TOBY-L3 series - System Integration Manual  Optimize antenna return loss, to optimize overall electrical performance of the module including a decrease of module thermal power.  Optimize the thermal design of any high-power components included in the application, such as linear regulators and amplifiers, to optimize overall temperature distribution in the application device.  Select the material, the thickness and the surface of the box (i.e.
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TOBY-L3 series - System Integration Manual  Do not apply loads which might exceed the limit for the maximum available current from V_INT supply.  Check that the voltage level of any connected pin does not exceed the relative operating range.  Provide accessible test points directly connected to the following pins of the TOBY-L3 series modules: V_INT, PWR_ON and RESET_N for diagnostic purposes.  Capacitance and series resistance must be limited on each SIM signal to match the SIM specifications.
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TOBY-L3 series - System Integration Manual  Check 50  nominal characteristic impedance of the RF transmission line connected to the ANT1 and the ANT2 ports (antenna RF interfaces).  Ensure no coupling occurs between the RF interface and noisy or sensitive signals (SIM signals, high-speed digital lines such as the USB, SDIO, SGMII, eMMC, SPI and other data lines).  Optimize placement for minimum length of the RF line.
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TOBY-L3 series - System Integration Manual  Ensure a low Envelope Correlation Coefficient between the primary (ANT1) and the secondary (ANT2) antennas: the 3D antenna radiation patterns should have radiation lobes in different directions.  Ensure high isolation between the cellular antennas and any other antenna or transmitter.
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TOBY-L3 series - System Integration Manual 3 Handling and soldering ☞ No natural rubbers, no hygroscopic materials or materials containing asbestos are employed. 3.1 Packaging, shipping, storage and moisture preconditioning For information about the TOBY-L3 series reels / tapes, Moisture Sensitivity levels (MSD), shipment and storage information, as well as drying for preconditioning, see the TOBY-L3 series Data Sheet [1]. 3.
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TOBY-L3 series - System Integration Manual  To prevent electrostatic discharge through the RF pin, do not touch any exposed antenna area. If there is any risk that such an exposed antenna area is touched in a non-ESD protected work area, implement suitable ESD protection measures in the design.  When soldering the module and patch antennas to the RF pin, make sure to use an ESD safe soldering iron. 3.3 Soldering 3.3.
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TOBY-L3 series - System Integration Manual  Temperature rise rate: max 3 °C/s If the temperature rise is too rapid in the preheat phase, it may cause excessive slumping.  Time: 60 – 120 s If the preheat is insufficient, rather large solder balls tend to be generated. Conversely, if performed excessively, fine balls and large balls will be generated in clusters.  End Temperature: 150 °C - 200 °C If the temperature is too low, non-melting tends to be caused in areas containing large heat capacity.
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TOBY-L3 series - System Integration Manual Preheat Heating Peak Temp. 245°C [°C] 250 Cooling [°C] 250 Liquidus Temperature 217 200 217 200 40 - 60 s End Temp. 150 - 200°C max 4°C/s 150 150 max 3°C/s 60 - 120 s 100 Typical Leadfree Soldering Profile 50 100 50 Elapsed time [s] Figure 60: Recommended soldering profile ☞ The modules must not be soldered with a damp heat process. 3.3.
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TOBY-L3 series - System Integration Manual (besides others) is the risk of the module falling off due to the significantly higher weight in relation to other components. ☞ Tashang gives no warranty against damages to the TOBY-L3 series modules caused by performing more than a total of two reflow soldering processes (one reflow soldering process to mount the TOBY-L3 series module, plus one reflow soldering process to mount other parts). 3.3.
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TOBY-L3 series - System Integration Manual The RF shields do not provide 100% protection for the module from coating liquids with low viscosity, and therefore care is required in applying the coating. ☞ Conformal coating of the module will void the warranty. 3.3.10 Casting If casting is required, use viscose or another type of silicon pottant. The OEM is strongly advised to qualify such processes in combination with the cellular modules before implementing this in production.
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TOBY-L3 series - System Integration Manual 4 Approvals ☞ For the complete list and specific details regarding the certification schemes approvals, see the TOBYL3 series Data Sheet [1], or contact the Tashang office or sales representative nearest you. 4.
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TOBY-L3 series - System Integration Manual [15] documents, is a statement of the implemented and supported capabilities, functions and options of a device. ☞ The PICS document of the application device integrating TOBY-L3 series modules must be updated from the module PICS statement if any feature stated as supported by the module in its PICS document is not implemented or disabled in the application device.
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TOBY-L3 series - System Integration Manual 5 Product testing 5.1 Product test Tashang 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. This is achieved with automatic test equipment (ATE) in the production line, which logs all production and measurement data.
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TOBY-L3 series - System Integration Manual 5.2 Test parameters for OEM manufacturers Because of the testing performed by Tashang (with 100% coverage), an OEM manufacturer does not need to repeat firmware tests or measurements of the module RF performance or tests over digital interface in their production test.
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TOBY-L3 series - System Integration Manual ⚠ To avoid module damage during the transmitter test, a suitable antenna according to module specifications or a 50  termination must be connected to the ANT1 port. ⚠ To avoid module damage during receiver, test the maximum power level received at the ANT1 and ANT2 ports which must meet the module specifications. ☞ The AT+UTEST command sets the module to emit RF power ignoring LTE/3G/2G signaling protocol.
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TOBY-L3 series - System Integration Manual 6 FCC Notes 1. This module is limited to OEM installation ONLY. 2. This module is limited to installation in mobile or fixed applications, according to Part 2.1091(b). 3. The separate approval is required for all other operating configurations, including portable configurations with respect to Part 2.1093 and different antenna configurations 4. For FCC Part 15.
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TOBY-L3 series - System Integration Manual designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
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Appendix 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 ACM Abstract Control Model ADC Analog to Digital Converter AP Application Processor API Application Program Interface ASIC Application-Specific Integrated Circuit AT AT Command Interpreter Software Subsystem, or attention BAW Bulk Acoustic Wave CSFB Circuit Switched Fall-B
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Abbreviation Definition FTP File Transfer Protocol FW Firmware GMSK Gaussian Minimum-Shift Keying modulation GND Ground GNSS Global Navigation Satellite System GPIO General Purpose Input Output GPRS General Packet Radio Service GPS Global Positioning System HBM Human Body Model HSDPA High Speed Downlink Packet Access HSUPA High Speed Uplink Packet Access HTTP HyperText Transfer Protocol HW Hardware I/Q In phase and Quadrature I2C Inter-Integrated Circuit interface I2S Inter
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Abbreviation Definition QPSK Quadrature Phase Shift Keying RF Radio Frequency RGMII Reduced Gigabit Media Independent Interface RMII Reduced Media Independent Interface RSE Radiated Spurious Emission RTC Real Time Clock SAW Surface Acoustic Wave SDIO Secure Digital Input Output SDN / PCN / IN Sample Delivery Note / Product Change Notification / Information Note SGMII Serial Gigabit Media Independent Interface SIM Subscriber Identification Module SMS Short Message Service SPI Seria
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Related documents [1] TOBY-L3 series Data Sheet, Doc. No. TSD-19081201 [2] TOBY-L3 series AT Commands Manual, Doc. No. TSD-19102501 [3] TOBY-L3 series Open CPU SDK User Manual. TSD-20080301 [4] Universal Serial Bus Rev. 2.0 specification, https://www.usb.org/ [5] Universal Serial Bus Rev. 3.0 specification, https://www.usb.org/ [6] ITU-T Recommendation V.
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Revision history Revision Date Name Comments R01 06-Sep-2019 Herb Initial release R02 28-Feb-2020 Herb Add the details of the software features Modify the circuit design of SDIO and I2S interface R03 17-Mar-2020 Herb Modify the default GPIO configuration R04 05-Aug-2020 Herb Add the PIN reuse of UART, SPI and I2S interfaces Add LTE B18 for Japan and India region in TOBY-L3904 series module.
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Contact Tashang Offices Headquarters Tashang Semiconductor (Shanghai) Co., Ltd. Phone: +86 21 6029 4659 E-mail: sales@ta-shang.com Information: info@ta-shang.com Support: support@ta-shang.