Fibocom SC126 Hardware Manual
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Fibocom SC126 Hardware Manual

Fibocom SC126 Hardware Manual

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SC126
Hardware Guide
V1.2

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Summary of Contents for Fibocom SC126

  • Page 1 SC126 Hardware Guide V1.2...
  • Page 2 For any violation of confidentiality obligations, unauthorized use or malicious use of the document and information in other illegal forms, Fibocom has the rights to pursue legal responsibility.
  • Page 3 Contact Website: https://www.fibocom.com Address: Floor 10-14, Block A, Building 6, Shenzhen International Innovation Valley, Dashiyi Road, Xili Community, Xili Street, Nanshan District, Shenzhen Tel: 0755-26733555 Safety Instruction Do not operate wireless communication products in areas where use of radio is not recommended without proper equipment certification.

  • Page 4: Table Of Contents

    3.2.1.2 Power-off and Reset ..................36 3.2.1.3 Sleep/Wakeup ....................37 3.2.1.4 Volume Control ....................37 3.3 USB interface ....................... 37 3.4 UART ..........................41 3.5 SPI ........................... 42 3.6 SD ............................ 42 3.7 SIM ..........................44 Copyright © Fibocom Wireless Inc.
  • Page 5 4.2.2 Circuit Reference Design ..................68 4.3 GNSS Antenna ......................68 4.3.1 GNSS operating frequency ................69 4.3.2 Circuit Reference Design ..................69 4.4 Antenna Requirements ..................... 70 5 RF PCB Layout Design Guide ..............72 Copyright © Fibocom Wireless Inc.
  • Page 6 10.2 Packaging and Storage ................... 95 Appendix A Acronyms and Abbreviations ..........102 Appendix B GPRS Encoding Scheme ............105 Appendix C GPRS Multi-timeslot ..............106 Appendix D EDGE Modulation and Encoding Method ......107 Copyright © Fibocom Wireless Inc.

  • Page 7: Applicable Models

    16GB e.MMC+16Gb LPDDR4X.SDRAM, 4G frequency SC126-NA-10 band, Android 12, applicable in North America 16GB e.MMC+16Gb LPDDR4X.SDRAM, 4G frequency SC126-EAU-10 band, Android 12, applicable in Europe 16GB e.MMC+16Gb LPDDR4X.SDRAM, 4G frequency SC126-CN-10 band, Android 12, applicable in China Copyright © Fibocom Wireless Inc.

  • Page 8: Change History

    Change History Change History V1.2（2022-07-30） Added CN RF parameters V1.1 (2022-06-13) Revised some description errors and added EAU RF parameters. V1.0 (2022-04-06) Initial version Copyright © Fibocom Wireless Inc.

  • Page 9: Foreword

    1.1 Description This document describes the electrical characteristics, RF performance, structure size, application environment, etc. of SC126 series module (hereinafter referred to as module). With the assistance of the document and other instructions, the developers can quickly understand the hardware functions of the module and develop products.
  • Page 10 ⚫ Bluetooth Low Energy RF PHY Test Specification, RF-PHY.TS/4.2.0, November 7, 2014 ⚫ Bluetooth Low Energy RF PHY Test Specification, RF-PHY.TS/5.0.2, December 07,2017 ⚫ Bluetooth Low Energy RF PHY Test Specification, RF-PHY.TS/5.1.0, December 07,2018 ⚫ Copyright © Fibocom Wireless Inc.

  • Page 11: Product Overview

    MIPI/USB/UART/SPI/I C. It is the optimal solution for the core system of wireless smart products. Its corresponding network modes and frequency bands are as follows: Table 1. SC126-NA supported bands Mode Band FDD-LTE Band 2/4/5/7/12/13/17/25/26/66/71...

  • Page 12: Main Performance

    2 Product Overview Mode Band BT5.0 2402-2480MHz GNSS GPS/GLONASS/BeiDou Table 3. SC126-CN supported bands Mode Band EGSM900/DCS1800 WCDMA Band 1/8 FDD-LTE Band 1/3/5/8 TDD-LTE Band 34/39/38/40/41(2496-2690MHz) WIFI802.11a/b/g/n/ac 2402-2482MHz;5170-5835MHz BT5.0 2402-2480MHz GNSS GPS/GLONASS/BeiDou 2.2 Main Performance The module is available in LCC + LGA package with 262 pins, including 146 LCC pins and 116 LGA pins.
  • Page 13 Uplink encoding format: CS 1-4 and MCS 1-9 Downlink encoding format: CS 1-4 and MCS 1-9 Support 3GPP R8 DC-HSPA+ Support 16-QAM, 64-QAM and QPSK modulation WCDMA features CAT7 HSUPA: maximum uplink rate 5.76Mbps CAT14 HSDPA: maximum downlink rate 42Mbps Copyright © Fibocom Wireless Inc.
  • Page 14 USB 2.0 interface supports USB interface the HS (480 Mbps) mode and software download, and is downward compatible with FS and LS interface. USB supports the OTG function and HUB extensible interface supports USB OTG. Copyright © Fibocom Wireless Inc.
  • Page 15 RoHS compliant 1) The storage capacity varies according to the actual model. 2) When the module is operating within this temperature range, the functions of it are normal and the relevant performance meets the 3GPP standard. Copyright © Fibocom Wireless Inc.

  • Page 16: Function Block Diagram

    Function block diagram shows the main hardware features of the module, including: Baseband ⚫ Wireless transceiver ⚫ Power Management ⚫ Memory ⚫ Peripheral interface ⚫ Communication expansion interface (USB/UART/I C/SD) ◦ (U)SIM card interface ◦ MIPIDSI interface ◦ MIPICSI interface ◦ Analog audio interface ◦ Copyright © Fibocom Wireless Inc.
  • Page 17 2 Product Overview ANT_MAIN ANT_GNSS ANT_DIV ANT_WIFI /BT Switch Switch Diplexer 2.4G Duplex VPH_PWR LDO OUT VBAT VRTC AUDIO Control Air Interface Memory RESET PWRKEY Multimedia Connectivity UART (U)SIM GPIO VoL key Figure 1. Function block diagram Copyright © Fibocom Wireless Inc.

  • Page 18: Pin Definition

    2 Product Overview 2.4 Pin Definition 2.4.1 Pin Distribution Figure 2. Pin distribution Copyright © Fibocom Wireless Inc.

  • Page 19: Pin Description

    Module pins are described in the following table: Table 6. Description of module pins Pin Name Pin No. I/O Pin Description Remarks Power interface 1, 2, VBAT 145, Main power supply VRTC PI/PO RTC power supply VDD_2V8 2.8V voltage output Copyright © Fibocom Wireless Inc.
  • Page 20 200, 201, 208, 209, 211, 212, 213, 214, 215, 216, 217, 218, 235, 245, 246, 250, 251, 262 Battery Supply Interface Connected to the VBAT_SNS Battery positive detection positive pole of the battery. VBAT_M Battery negative detection Connected to the Copyright © Fibocom Wireless Inc.
  • Page 21 Reset key Active low CBL_PWR_N Auto power-on pin Active low (U)SIM card interface Active high by UIM2_DET UIM2 hot plugging detection default UIM2_RST UIM2 reset signal UIM2_CLK UIM2 clock signal UIM2_DATA DI/DO UIM2 data signal Copyright © Fibocom Wireless Inc.
  • Page 22 CAM0 I C data signal CAM_I2C_SCL1 CAM1/2 I C clock signal For camera only CAM_I2C_SDA1 DI/DO CAM1/2 I C data signal SENSOR_I2C_SCL Sensor I C clock For sensor only SENSOR_I2C_SDA DI/DO Sensor I C data Copyright © Fibocom Wireless Inc.
  • Page 23 USB 3.1 differential data USB_SS1_TX_P sending+ USB 3.1 differential data USB_SS2_RX_M receiving- USB 3.1 differential data USB_SS2_RX_P receiving+ USB 3.1 differential data USB_SS2_TX_M sending- USB 3.1 differential data USB_SS2_TX_P sending+ USB_CC1 AI/AO USB_CC1 USB_CC2 AI/AO USB_CC2 Copyright © Fibocom Wireless Inc.
  • Page 24 Serial interface UART1_RX UART1_TX Serial interface UART1_TX SPI Interface SPI_CLK SPI clock SPI_CS SPI chip select 118, SPI_MISO SPI Master In Slave Out 119, SPI_MOSI SPI Master output Slave input LCD Interface MIPI_DSI0_CLK_N LCD MIPI-DSI signal Copyright © Fibocom Wireless Inc.
  • Page 25 PWM control LCD_RST LCD reset signal LCD swipe synchronization LCD_TE signal TP Interface TP_INT TP interrupt TP_RST TP reset signal Camera interface MIPI_CSI0_CLK_P MIPI_CSI0_CLK_N Camera MIPI-CSI0 interface. MIPI_CSI0_LN0_N Keep the unused pins unconnected. MIPI_CSI0_LN0_P MIPI_CSI0_LN1_N Copyright © Fibocom Wireless Inc.
  • Page 26 MCAM_MCLK Camera 1 clock signal MCAM_RST Camera 1 reset signal MCAM_PWDN Camera 1 shutdown signal SCAM_MCLK Camera 2 clock signal SCAM_RST Camera 2 reset signal SCAM_PWDN Camera 2 shutdown signal DCAM_PWDN Camera 3 shutdown signal Copyright © Fibocom Wireless Inc.
  • Page 27 Headphone reference ground grounded. Headphone left channel HPH_L output HPH_DET Headphone plug detection An external MIC MIC_BIAS1 Main MIC bias voltage 1 bias circuit needs to be added for MIC_BIAS3 Secondary MIC bias voltage 3 the module. Copyright © Fibocom Wireless Inc.
  • Page 28 GPIO_56 DI/DO B-PD: nppukp Ordinary GPIO, 1.8V power domain B-PD:nppukp; used internally as GPIO_57 DI/DO bootconfig, which cannot be pulled up GPIO_58 DI/DO B-PD: nppukp B-PD:nppukp; used internally as GPIO_60 DI/DO bootconfig, which cannot be Copyright © Fibocom Wireless Inc.
  • Page 29 B-PD: nppukp B-PD:nppukp; used internally as GPIO_111 DI/DO bootconfig, which cannot be pulled up GPIO_112 DI/DO B-PD: nppukp B-PD: nppukp； PM_GPIO_4 DI/DO PMIC GPIO B-PD: nppukp； PM_GPIO_3 DI/DO PMIC GPIO B-PD: nppukp； PM_GPIO_7 DI/DO PMIC GPIO Copyright © Fibocom Wireless Inc.
  • Page 30 Other Interfaces ADC input Don't suggest GNSS_LNA_EN GNSS_LNA enable using it as GPIO. NFC_CLK NFC clock Ordinary GPIO, 1.8V power GRFC_13 DI/DO domain Ordinary GPIO, 1.8V power GRFC_14 DI/DO domain GRFC_15 DI/DO Ordinary GPIO, 1.8V power Copyright © Fibocom Wireless Inc.
  • Page 31 UART_RTS SPI_MOSI I2C_SCL GPIO_6 QUP SE1 UART_TX SPI_SCLK GPIO_7 UART_RX SPI_CS_0 48, 183 GPIO_6 UART_CTS SPI_MISO I2C_SDA GPIO_7 UART_RTS SPI_MOSI I2C_SCL GPIO_7 QUP SE2 UART_TX SPI_SCLK GPIO_8 UART_RX SPI_CS_0 GPIO_9 QUP SE4 UART_CTS SPI_MISO I2C_SDA Copyright © Fibocom Wireless Inc.
  • Page 32 UART_RTS SPI_MOSI I2C_SCL QUP SE5 GPIO_1 UART_TX SPI_SCLK GPIO_1 UART_RX SPI_CS_0 The QUP interfaces in the same group cannot be configured in different types at the same time, for example, UART and I C interfaces. Copyright © Fibocom Wireless Inc.

  • Page 33: Application Interfaces

    (no less than 3mm) and the ground plane of the power section should be flat to reduce the equivalent impedance of the VBAT route and avoid significant voltage drop at high currents at maximum transmit power. Copyright © Fibocom Wireless Inc.
  • Page 34 Figure 4. Reference design of power circuit The following table describes the filter capacitor design of power supply. Table 9. Filter capacitor design of power supply Recommended Application Description Capacitor 220μF×2 Regulating To reduce power fluctuations during module Copyright © Fibocom Wireless Inc.

  • Page 35: Vrtc

    Value VRTC output voltage 2.45 3.35 VRTC input voltage (clock works well) 3.35 VRTC input current (clock works well) The VRTC power supply uses the following reference circuit when powered by an external power source: Copyright © Fibocom Wireless Inc.

  • Page 36: Vph_Pwr

    Table 11. Power output Pin Name Default Voltage (V) Drive Current (mA) VDD_2V8 LDO15_1V8 VPH_PWR =VBAT 1000 LDO19_UIM2 1.8/3.0 LDO18_UIM1 1.8/3.0 IOVDD_1V8 LDO17A_3V0 Copyright © Fibocom Wireless Inc.

  • Page 37: Control Signal

    3.2.1.1 Power-On After the module’s VBAT pin is powered on, pull down KEY_PWR_ON pin for 2s–8s to trigger module to start. The keystroke and OC driver power-on reference circuit are designed as follows: Copyright © Fibocom Wireless Inc.
  • Page 38 The CBL_PWR_N pin is connected to the ground through a 1K resistor, and the module can be started up automatically after power-on. The following figure shows the reference circuit for automatic startup upon power-on. Figure 8. CBL power-on reference circuit Power on sequence is shown as follows: Copyright © Fibocom Wireless Inc.

  • Page 39: Power-Off And Reset

    Forced power off: Pull down KEY_PWR_ON pin for 9s to 15s, and the module will be forcibly powered off. The forced power off timing is as follows: VBAT 9s ＜ T ＜ 15s KEY_PWR_N LDO15_1V8 Other LDOs Figure 10. Power-off timing Copyright © Fibocom Wireless Inc.

  • Page 40: Sleep/Wakeup

    USB 2.0 interface supports the HS (480Mbps) mode and software download, and is downward compatible with FS and LS interface. USB supports OTG function and HUB expansion interface. The pin definition of the USB interface is as follows: Copyright © Fibocom Wireless Inc.
  • Page 41 USB_SS2_TX_M data sending- USB 3.1 differential USB_SS2_TX_P data sending+ USB_CC1 AI/AO USB_CC1 USB_CC2 AI/AO USB_CC2 Table 14. USB 2.0 pin definition Pin Name Pin No. I/O Description Remarks 141, USB_VBUS PI/PO USB 5V power supply Copyright © Fibocom Wireless Inc.
  • Page 42 SSTXP1 USB_SS_TX0_P SSTXN1 USB_SS_TX0_M SSRXP1 USB_SS_RX0_P SSRXN1 USB_SS_RX0_M SSTXP2 USB_SS_TX1_P SSTXN2 USB_SS_TX1_M SSRXP2 USB_SS_RX1_P SSRXN2 USB_SS_RX1_M Figure 11. USB 3.1 reference circuit design The reference circuit design of the USB 2.0 interface is as follows: Copyright © Fibocom Wireless Inc.
  • Page 43 Control the differential impedance, make it 90Ω±10% and ensure that the differential ⚫ cable length differences is within 0.7mm. Copyright © Fibocom Wireless Inc.

  • Page 44: Uart

    UART1_TX Serial interface UART1_TX The voltage domain of each serial port is 1.8V; when communicating with other voltage domain serial ports, it is necessary to add a level-shifting chip with the following reference circuit design: Copyright © Fibocom Wireless Inc.

  • Page 45: Spi

    3.6 SD The module supports one SD interface. The pin definition is as follows: Table 17. Definition of SD interface pins Pin No. Pin Name I/O Description Remarks Active low by SD_DET SD card detection default Copyright © Fibocom Wireless Inc.
  • Page 46 LDO L4 SDIO pull up power LDO4_SDIO output SD interface reference circuit design is as follows: VDD_SD VIO_1V8 100MHz_120R VDD_SDIO Connector Module SDC_DATA3 DAT3 SDC_DATA2 DAT2 DAT1 SDC_DATA1 SDC_DATA0 DAT0 SDC_CLK SDC_CMD SDC_DET Figure 14. SD reference circuit Copyright © Fibocom Wireless Inc.

  • Page 47: Sim

    Active high by UIM1_DET （U）SIM1 card detection default UIM1_RST （U）SIM1 reset UIM1_CLK （U）SIM1 clock UIM1_DATA DI/DO （U）SIM1 data Active high by UIM2_DET （U）SIM2 card detection default UIM2_RST （U）SIM2 reset UIM2_CLK （U）SIM2 clock UIM2_DATA DI/DO （U）SIM2 data Copyright © Fibocom Wireless Inc.

  • Page 48: Gpio

    The module has rich GPIO resources and the interface level is 1.8V. The pin definition is as follows: Table 19. GPIO list Pin Name Pin No. Reset Status Interrupt Function GPIO_28 B-PD: nppukp GPIO_31 B-PD: nppukp GPIO_32 B-PD: nppukp GPIO_55 B-PD: nppukp GPIO_56 B-PD: nppukp GPIO_57 B-PD: nppukp GPIO_58 B-PD: nppukp Copyright © Fibocom Wireless Inc.
  • Page 49 B-PD: nppukp GPIO_112 B-PD: nppukp PM_GPIO_4 B-PD: nppukp PM_GPIO_3 B-PD: nppukp PM_GPIO_7 B-PD: nppukp PM_GPIO_8 B-PD: nppukp Table 20. Parameter description Parameter Description Bidirectional digital with CMOS input pdpukp: defaulted to no-pull with programmable options Copyright © Fibocom Wireless Inc.

  • Page 50: I 2 C

    For camera only C data signal of CAM_I2C_SDA0 camera 0 C clock signal of CAM_I2C_SCL1 camera 1/2 For camera only C data signal of CAM_I2C_SDA1 camera 1/2 SENSOR_I2C_SCL Sensor I C clock For sensor only Copyright © Fibocom Wireless Inc.

  • Page 51: Adc

    Connected to the positive pole VBAT_SNS detection of the battery. Connected to the negative Battery negative VBAT_M pole of the battery. Keep the detection unused pins unconnected. VBAT_THERM Battery temperature Connect the pin to GND with Copyright © Fibocom Wireless Inc.

  • Page 52: Charging Description

    The screen interface is based on MIPI_DSI standard and supports one set of 4-Lane high-speed differential data transmission. It supports 1080P resolution. Table 25. LCD pin definition Pin Name Description Remarks MIPI_DSI0_CLK_N LCD MIPI-DSI signal MIPI_DSI0_CLK_P Copyright © Fibocom Wireless Inc.
  • Page 53 MIPI_DSI0_LN3_N 60 MIPI_DSI0_LN3_P LCD backlight brightness PWM control LCD_RST LCD reset signal LCD swipe synchronization LCD_TE signal VDD_2V8 2.8V voltage output LDO15_1V8 LDO L15 1.8V power output The reference circuit of LCD interface is as follows: Copyright © Fibocom Wireless Inc.
  • Page 54 MIPI routing is recommended to be designed in the inner layer, and connected using ⚫ GND in three dimensions; The MIPI signal line needs to be controlled with a 100Ω differential impedance with ⚫ tolerance ±10%; Copyright © Fibocom Wireless Inc.
  • Page 55 LDO15_1V8 LDO L15 1.8V power output TP_INT TP interrupt TP_RST TP reset signal TP_I2C_SCL TP I C clock signal TP_I2C_SDA 48, 183 DI/DO TP I C data signal TP reference circuit design is as follows: Copyright © Fibocom Wireless Inc.

  • Page 56: Camera

    25MP. The pin definition of camera interface is as follows: Table 27. Camera interface pin definition Pin Name Pin No. 4-lane+2-lane+1-lane MIPI_CSI0_CLK_P MIPI_CSI0_CLK_N MIPI_CSI0_LN0_N 4-lane camera MIPI-CSI0 interface. MIPI_CSI0_LN0_P Keep the unused pins MIPI_CSI0_LN1_N unconnected. MIPI_CSI0_LN1_P MIPI_CSI0_LN2_N MIPI_CSI0_LN2_P Copyright © Fibocom Wireless Inc.
  • Page 57 Camera 1 clock signal SCAM_RST Camera 1 reset signal SCAM_PWDN Camera 1 shutdown signal DCAM_PWDN Camera 2 shutdown signal DCAM_RST Camera 2 reset signal DCAM_MCLK Camera 2 clock signal CAM_I2C_SCL0 C clock signal of camera 0 Copyright © Fibocom Wireless Inc.

  • Page 58: Camera 0

    The module does not have this power supply, so it needs to be provided by an external VDDAF_2V8 high-power noise suppression ratio LDO 3.15.1 Camera 0 The reference circuit design of camera 0 is as follows: Copyright © Fibocom Wireless Inc.

  • Page 59: Camera 1

    MIPI_CSI_LN3_N DAT3_N MIPI_CSI_LN2_P DAT2_P MIPI_CSI_LN2_N DAT2_N MIPI_CSI_LN1_P DAT1_P MIPI_CSI_LN1_N DAT1_N MIPI_CSI_LN0_P DAT0_P DAT0_N MIPI_CSI_LN0_N Figure 18. Reference circuit design of camera 0 3.15.2 Camera 1 The reference circuit design of camera 1 is as follows: Copyright © Fibocom Wireless Inc.

  • Page 60: Camera 2

    CAM_I2C_SCL CAM_I2C_SDA MIPI_CSI_CLK_P CLK_P MIPI_CSI_CLK_N CLK_N MIPI_CSI_LN1_P DAT1_P MIPI_CSI_LN1_N DAT1_N MIPI_CSI_LN0_P DAT0_P MIPI_CSI_LN0_N DAT0_N Figure 19. Reference circuit design of camera 1 3.15.3 Camera 2 The reference circuit design of camera 2 is as follows: Copyright © Fibocom Wireless Inc.

  • Page 61: Design Considerations

    EMI (electromagnetic interference) of the circuit; MIPI routing is recommended to be designed in the inner layer, and connected using ⚫ GND in three dimensions; Copyright © Fibocom Wireless Inc.

  • Page 62: Audio

    C, confirm that the I C addresses of the two cameras are unique. 3.16 Audio 3.16.1 Definition of Audio Interface The module supports analog audio interface, and has 3 inputs and 3 outputs. Pin definition is as follows: Copyright © Fibocom Wireless Inc.
  • Page 63 Headphone left channel HPH_L output Headphone plug HPH_DET detection MIC_BIAS1 Main MIC bias voltage 1 An external MIC bias circuit needs to be added Secondary MIC bias MIC_BIAS3 for the module. voltage 3 Audio Interface Design Consideration: Copyright © Fibocom Wireless Inc.

  • Page 64: Mic Circuit Design

    Reserve LC filter circuit in audio circuit to reduce EMI; ○ Shield the audio routing. ○ 3.16.2 MIC Circuit Design It is recommended to use a silicon MIC, and the reference design circuit is as follows: Figure 21. Microphone circuit design Copyright © Fibocom Wireless Inc.

  • Page 65: Receiver Circuit Design

    3.16.4 Headphone Interface Circuit Design Figure 23. Headphone interface circuit design Use a bi-directional TVS tube for the ESD protection device of the headphone interface. 3.17 Force Download Interface The module provides KEY_FORCE_BOOT pin as an emergency download interface. Copyright © Fibocom Wireless Inc.
  • Page 66 To facilitate the subsequent software upgrade and product debugging, please reserve this pin. The reference circuit is as follows: VIO_1V8 Module FORCE_BOOT Figure 24. Design of forced download interface Copyright © Fibocom Wireless Inc.

  • Page 67: Antenna Interface

    Table 29. MAIN/DRX antenna interface definition Pin Name Pin No. Description Remarks ANT_MAIN AI/AO 2G/3G/4G main antenna interface ANT_DRX 4G diversity antenna interface 4.1.1 Operating Bands Table 30. SC126-NA operating band Mode Band TX (MHz) RX (MHz) Band 2 1850-1910 1930-1990 Band 4 1710-1755 2110-2155...
  • Page 68 RX (MHz) Band 26 814-849 859-894 Band 66 1710-1780 2110-2180 Band 71 663-698 617-652 LTE TDD Band 41 2496-2690 2496-2690 Table 31. SC126-EAU operating band Mode Band TX (MHz) RX (MHz) 824-849 869-894 880-915 925-960 1800 1710-1785 1805-1880 1900 850-1910...
  • Page 69 791-821 Band 28 703-748 758-803 Band 38 2570-2620 2570-2620 LTE TDD Band 40 2300-2400 2300-2400 Band 41 2496-2690 2496-2690 Table 32. SC126-CN operating band Mode Band TX（MHz） RX（MHz） 880-915 925-960 1800 1710-1785 1805-1880 Band 1 1920-1980 2110-2170 WCDMA Band 8...

  • Page 70: Circuit Reference Design

    Microstrip route is recommended for the WIFI/BT RF route, with insertion loss within 0.2dB and impedance at 50Ω. Table 33. WIFI/BT antenna interface definition Pin Name Pin No. Description Remarks WIFI/BT_ ANT AI/AO WIFI/BT antenna interface Copyright © Fibocom Wireless Inc.

  • Page 71: Operating Bands

    The reference circuit of WIFI/BT antenna is shown as follows: Figure 26. Antenna reference circuit 4.3 GNSS Antenna GNSS supports GPS, GLONASS, and BeiDou. Table 35. GNSS antenna interface definition Pin Name Pin No. Description Remarks GNSS_ANT GNSS antenna interface Copyright © Fibocom Wireless Inc.

  • Page 72: Gnss Operating Frequency

    For passive antenna, it is recommended to add a TVS with a junction capacitance of less than 0.5pF; CJ: 0.5pF; clamping voltage: 5.0V. Recommended unit: ESD9D5U. The active antenna reference circuit is shown in the following figure: Copyright © Fibocom Wireless Inc.

  • Page 73: Antenna Requirements

    Table 37. Antenna requirements Module Antenna Requirement Standard Antenna Requirement VSWR: < 2 (typical) Gain (dBi): 1 Max input power (W): 5 LTE/WCDMA/GSM Input impedance (Ω): 50 Polarization type: vertical direction Insertion loss:< 1dB (0.6-1GHz) Copyright © Fibocom Wireless Inc.
  • Page 74 VSWR: < 2 (typical) GNSS Passive antenna gain: > 0dBi Active antenna NF: < 1.5dB (typical) Active antenna gain: > -2dBi Isolation between GPS and main >20dB antenna Isolation between WIFI and LTE >20dB antenna Copyright © Fibocom Wireless Inc.

  • Page 75: Rf Pcb Layout Design Guide

    50Ω. Microstrip cable complete structure ⚫ Figure 29. Two-layer PCB microstrip line structure Coplanar waveguide complete structure ⚫ Figure 30. Two-layer PCB coplanar waveguide structure Copyright © Fibocom Wireless Inc.
  • Page 76 The impedance simulation tool should be used to accurately control the RF signal line ⚫ at 50Ω impedance. The GND pin adjacent to the RF pin should not have thermal welding plate and should ⚫ be in full contact with the ground. Copyright © Fibocom Wireless Inc.
  • Page 77 RF performance; and the distance between the ground holes and the signal line should be at least 2 ⚫ times of the line width (2*W). Copyright © Fibocom Wireless Inc.

  • Page 78: Wifi And Bluetooth

    6.2 WIFI Performance Test condition: 3.8V power supply, environment temperature 25°C. Table 38. WIFI transmitting power Bandwidth Frequency Mode Data Rate TX Power (dBm) (MHz) 1Mbps 17±3 802.11b 11Mbps 17±3 2.4G 6Mbps 17±3 802.11g 54Mbps 16±3 Copyright © Fibocom Wireless Inc.
  • Page 79 MCS7 13±3 MCS0 16±3 MCS8 13±3 MCS0 14±3 802.11ac MCS9 12±3 MCS0 13±3 MCS9 11±3 Table 39. WIFI receiving sensitivity Frequency Mode Data Rate Bandwidth (MHz) Sensitivity (dBm)* 1Mbps 802.11b 11Mbps 2.4G 6Mbps 802.11g 54Mbps Copyright © Fibocom Wireless Inc.

  • Page 80: Bluetooth Overview

    MCS9 MCS0 MCS9 The sensitivity here is a typical value. 6.3 Bluetooth Overview The module supports BT5.0 (BR/EDR + BLE) standards. The modulation method supports GFSK, 8-DPSK and π/4-DQPSK.BR/EDR. Channel bandwidth is 1MHz and can Copyright © Fibocom Wireless Inc.

  • Page 81: Bluetooth Performance

    Refer to 4.2 LE BT5.0 24Mbit/s Refer to 5.0 6.4 Bluetooth Performance Test condition: 3.8V power supply, environment temperature 25°C. Table 41. BT performance indicators Type DH-5 2-DH5 3-DH5 Unit Transmitting power 11±2.5 10±2.5 10±2.5 6±2.5 Receiving sensitivity Copyright © Fibocom Wireless Inc.

  • Page 82: Gnss

    Test condition: 3.8V power supply, environment temperature 25°C. Table 42. GNSS positioning performance Parameter Description Typical Result Unit Acquisition -157 Sensitivity Tracking -145 C/No -130 dBm dB-Hz Cold Start TTFF Warm Start Hot Start Static accuracy (95% @-130dbm) Copyright © Fibocom Wireless Inc.

  • Page 83: Electricity, Reliability And Rf Performance

    2.45 3.35 Operating °C temperature Storage °C temperature 8.2 Operating Current Test condition: 3.8V power supply, environment temperature 25°C. Table 44. SC126-NA operating current Typical Parameter Description Condition Unit Result Static leakage Leakage current before power current Normal power-off Power off leakage current...
  • Page 84 Band7@max power (10MHz, 1RB) Band12@max power (10MHz, 1RB) FDD data Band13@max power (10MHz, LTE-RMS 1RB) RMS Current Band17@max power (10MHz, 1RB) Band25@max power (10MHz, 1RB) Band26@max power (10MHz, 1RB) Band66@max power (10MHz, 1RB) Band71@max power (10MHz, 1RB) Copyright © Fibocom Wireless Inc.
  • Page 85 8 Electricity, Reliability and RF Performance Typical Parameter Description Condition Unit Result TDD data Band41@max power (10MHz,1RB) RMS Current Table 45. SC126-EAU operating current Paramete Typical Description Condition Unit Result Static leakage Leakage current before power current Normal power-off Power off leakage current...
  • Page 86 GSM850@ Gamma=3(1UL/4DL) 246 GSM850@ Gamma=3(4UL/1DL) 640 EGSM900@ Gamma=3(1UL/4DL) EGSM900@ Gamma=3(4UL/1DL) GPRS data DCS1800@ GPRS-RMS Gamma=3(1UL/4DL) RMS Current DCS1800@ Gamma=3(4UL/1DL) PCS1900@ Gamma=3(1UL/4DL) PCS1900@ Gamma=3(4UL/1DL) GSM850@ Gamma=6(1UL/4DL) 180 EGPRS data GSM850@ Gamma=6(4UL/1DL) 446 EGPRS-RMS EGSM900@ RMS Current Gamma=6(1UL/4DL) Copyright © Fibocom Wireless Inc.
  • Page 87 Band1@ max power Band2@ max power WCDMA WCDMA-RMS Band3@ max power RMS Current Band5@ max power Band8@ max power Band1@ power(10MHz,1RB) Band2@ power(10MHz,1RB) FDD data Band3@ LTE-RMS RMS Current power(10MHz,1RB) Band4@ power(10MHz,1RB) max 640 Band5@ Copyright © Fibocom Wireless Inc.
  • Page 88 Band20@ power(10MHz,1RB) Band28@ power(10MHz,1RB) Band38@ power(10MHz,1RB) TDD data Band40@ power(10MHz,1RB) RMS Current Band41@ power(10MHz,1RB) Table 46. SC126-CN operating current Paramete Typical Description Condition Unit Result Static leakage Leakage current before power current Normal power-off Power off leakage current Radio Off...
  • Page 89 DCS1800@ PCL=15 EGSM900@ PCL=5 2400 GSM voice GSM-MAX Peak current DCS1800@ PCL=0 1700 EGSM900@ Gamma=3(1UL/4DL) EGSM900@ Gamma=3(4UL/1DL) GPRS data GPRS-RMS DCS1800@ RMS Current Gamma=3(1UL/4DL) DCS1800@ Gamma=3(4UL/1DL) EGSM900@ Gamma=6(1UL/4DL) EGPRS data EGSM900@ EGPRS-RMS RMS Current Gamma=6(4UL/1DL) DCS1800@ Copyright © Fibocom Wireless Inc.
  • Page 90 Band1@ max power WCDMA WCDMA-RMS Band8@ max power RMS Current Band1@ power(10MHz,1RB) Band3@ power(10MHz,1RB) FDD data Band5@ RMS Current power(10MHz,1RB) Band8@ power(10MHz,1RB) Band34@ LTE-RMS power(10MHz,1RB) Band38@ power(10MHz,1RB) TDD data Band39@ power(10MHz,1RB) RMS Current Band40@ power(10MHz,1RB) Band41@ power(10MHz,1RB) Copyright © Fibocom Wireless Inc.

  • Page 91: Rf Transmit Power

    WCDMA Band 3 24+1/-3 <-49 Band 5 24+1/-3 <-49 Band 8 24+1/-3 <-49 Band 1 23.0±2 <-39 Band 2 23.0±2 <-39 LTE FDD Band 3 23.0±2 <-39 Band 4 23.0±2 <-39 Band 5 23.0±2 <-39 Copyright © Fibocom Wireless Inc.

  • Page 92: Rf Receiver Sensitivity

    The sensitivity of each frequency band of the module is shown in the following table: Test condition: 3.8V power supply, environment temperature 25°C, LTE power test performed with 10MHz bandwidth. For RB configuration, see 3GPP standard. Table 48. SC126-NA RF receiving sensitivity Mode Band...
  • Page 93 Band 66 -97.8 -100.3 -95.8 Band 71 -99.3 -98.8 -101.3 -93.5 LTE TDD Band 41 -96.1 -97.2 -98.6 -94.3 Table 49. SC126-EAU RF receiving sensitivity Mode Band Primary Diversity PRX+Div 3GPP Requirement Unit -107.8 -102 -108.7 -109.2 -102 1800 -107.9...
  • Page 94 -96.3 -96.6 -98.8 -96.3 LTE TDD Band 40 -96.3 -97.8 -98.8 -96.3 Band 41 -94.3 -96.7 -96.8 -94.3 Table 50. SC126-CN RF receiving sensitivity Mode Band Primary Diversity PRX+Div 3GPP Requirement Unit -109.2 -102 1800 -107.9 -102 Band 1 -107.4 -106.7...

  • Page 95: Electrostatic Protection

    The following table lists ESD performance parameters (Temperature: 25°C, Humidity: 45%–65%): Table 51. ESD performance Test Point Contact Discharge Air Discharge Unit VBAT, GND ±5 ±10 Antenna Interface ±5 ±10 Other interfaces ±0.5 ±1 Copyright © Fibocom Wireless Inc.

  • Page 96: Structure Specifications

    9 Structure Specifications 9 Structure Specifications 9.1 Product Appearance Figure 33. Product appearance 9.2 Structural Dimensions Figure 34. Structural dimensions Copyright © Fibocom Wireless Inc.

  • Page 97: Recommended Pcb Soldering Pad Design

    9 Structure Specifications 9.3 Recommended PCB Soldering Pad Design Fibocom_SC126_SMT Design For PCB soldering pad and stencil design, please refer to Guide 9.4 Recommended Thermal Design Fibocom_SC126_Thermal For recommended module and peripheral thermal design, see Design Guide Copyright © Fibocom Wireless Inc.

  • Page 98: Production And Storage

    10 Production and Storage 10 Production and Storage 10.1 SMT Fibocom_SC126_SMT Design Guide 10.2 Packaging and Storage Fibocom_SC126_SMT Design Guide Copyright © Fibocom Wireless Inc.
  • Page 99 Important Note notice that any deviation(s) from the defined parameters of the antenna trace, as described by the instructions, require that the host product manufacturer must notify to Fibocom wires Inc. that they wish to change the antenna trace design. In this case, a Class II permissive change application is required to be filed by the USI, or the host manufacturer can take responsibility through the change in FCC ID (new application) procedure followed by a Class II permissive change application.
  • Page 100 RF module in the user’s manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. Federal Communication Commission Interference Statement Copyright © Fibocom Wireless Inc.
  • Page 101 Part 15 Subpart B compliance testing with the modular transmitter installed. This device is intended only for OEM integrators under the following conditions: (For module device use) 1) The antenna must be installed such that 20 cm is maintained between the antenna and users, Copyright © Fibocom Wireless Inc.
  • Page 102 Cet équipement est conforme aux limites d'exposition aux rayonnements ISED établies pour un environnement non contrôlé. Cet équipement doit être installé et utilisé avec un minimum de 20 cm de distance entre la source de rayonnement et votre corps. Copyright © Fibocom Wireless Inc.
  • Page 103 OEM sera chargé de réévaluer le produit final (y compris l'émetteur) et l'obtention d'une autorisation distincte au Canada. End Product Labeling This transmitter module is authorized only for use in device where the antenna may be installed such Copyright © Fibocom Wireless Inc.
  • Page 104 RF dans le manuel de l'utilisateur du produit final qui intègre ce module. Le manuel de l'utilisateur final doit inclure toutes les informations réglementaires requises et avertissements comme indiqué dans ce manuel. Copyright © Fibocom Wireless Inc.

  • Page 105: Appendix A Acronyms And Abbreviations

    Maximum Load Current Light Emitting Diode Least Significant Bit Long Term Evolution Mobile Equipment Mobile Station Mobile Terminated Printed Circuit Board Protocol Data Unit Phase Shift Keying Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying Copyright © Fibocom Wireless Inc.
  • Page 106 Minimum Voltage Value VIHmax Maximum Input High Level Voltage Value VIHmin Minimum Input High Level Voltage Value VILmax Maximum Input Low Level Voltage Value VILmin Minimum Input Low Level Voltage Value VImax Absolute Maximum Input Voltage Value Copyright © Fibocom Wireless Inc.
  • Page 107 Maximum Output High Level Voltage Value VOHmin Minimum Output High Level Voltage Value VOLmax Maximum Output Low Level Voltage Value VOLmin Minimum Output Low Level Voltage Value VSWR Voltage Standing Wave Ratio WCDMA Wideband Code Division Multiple Access Copyright © Fibocom Wireless Inc.

  • Page 108: Appendix B Gprs Encoding Scheme

    Appendix B GPRS Encoding Scheme Table 53. GPRS encoding scheme Encoding Method CS-1 CS-2 CS-3 CS-4 Rate Pre-coded USF Radio Block excl. USF and BCS Tail Coded Bits Punctured Bits Data Rate Kb/s 9.05 13.4 15.6 21.4 Copyright © Fibocom Wireless Inc.

  • Page 109: Appendix C Gprs Multi-Timeslot

    GPRS device can use for both uplink and downlink communications at the same time. Table 54. Multislot allocation of different classes Multislot Class Downlink Slots Uplink Slots Active Slots Copyright © Fibocom Wireless Inc.

  • Page 110: Appendix D Edge Modulation And Encoding Method

    MCS-3 GMSK 14.8kbit/s 29.6kbit/s 59.2kbit/s MCS-4 GMSK 17.6kbit/s 35.2kbit/s 70.4kbit/s MCS-5 8-PSK 22.4kbit/s 44.8kbit/s 89.6kbit/s MCS-6 8-PSK 29.6kbit/s 59.2kbit/s 118.4kbit/s MCS-7 8-PSK 44.8kbit/s 89.6kbit/s 179.2kbit/s MCS-8 8-PSK 54.4kbit/s 108.8kbit/s 217.6kbit/s MCS-9 8-PSK 59.2kbit/s 118.4kbit/s 236.8kbit/s Copyright © Fibocom Wireless Inc.

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