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Quectel FGM842D Hardware Design

Quectel FGM842D Hardware Design

Wi-fi&bluetooth module
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FGM842D
Hardware Design
Wi-Fi&Bluetooth Module
Version: 1.0.0
Date: 2023-10-26
Status: Preliminary

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Summary of Contents for Quectel FGM842D

  • Page 1 FGM842D Hardware Design Wi-Fi&Bluetooth Module Version: 1.0.0 Date: 2023-10-26 Status: Preliminary...
  • Page 2 Wi-Fi&Bluetooth Module At Quectel, our aim is to provide timely and comprehensive services to our customers. If you require any assistance, please contact our headquarters: Quectel Wireless Solutions Co., Ltd. Building 5, Shanghai Business Park Phase III (Area B), No.1016 Tianlin Road, Minhang District,...
  • Page 3 Except as otherwise set forth herein, nothing in this document shall be construed as conferring any rights to use any trademark, trade name or name, abbreviation, or counterfeit product thereof owned by Quectel or any third party in advertising, publicity, or other aspects.

  • Page 4: Safety Information

    Manufacturers of the terminal should notify users and operating personnel of the following safety information by incorporating these guidelines into all manuals of the product. Otherwise, Quectel assumes no liability for customers’ failure to comply with these precautions.

  • Page 5: About The Document

    Wi-Fi&Bluetooth Module About the Document Revision History Version Date Author Description 2023-10-26 Wain ZHAO/Neil CHENG Creation of the document 1.0.0 2023-10-26 Wain ZHAO/Neil CHENG Preliminary FGM842D_Hardware_Design 4 / 50...

  • Page 6: Table Of Contents

    5.2. Bluetooth Performances ......................27 5.3. Antenna/Antenna Interfaces ......................28 5.3.1.1. Antenna Design Requirements ................28 5.3.2. FGM842D RF Coaxial Connector ..................28 5.3.2.1. Receptacle Specifications ..................28 5.3.2.2. Antenna Connector Installation ................29 5.3.2.3. Recommended RF Connector Installation .............. 30 5.3.2.4.
  • Page 7 Wi-Fi&Bluetooth Module 6.2. Power Supply Ratings ........................33 6.3. Power Consumption ........................34 6.3.1. Wi-Fi Power Consumption ....................34 6.3.2. Bluetooth Power Consumption ..................34 6.4. Digital I/O Characteristics ......................35 6.5. ESD Protection ..........................35 7 Mechanical Information ........................36 7.1.
  • Page 8 Table 26 : ESD Characteristics (Unit: kV) ....................35 Table 27 : Recommended Thermal Profile Parameters ................41 Table 28 : FGM842D Carrier Tape Dimension Table (Unit: mm) .............. 42 Table 29 : FGM842D-P Carrier Tape Dimension Table (Unit: mm) ............42 Table 30 : Plastic Reel Dimension Table (Unit: mm) .................
  • Page 9 Figure 24 :FGM842D Top and Side Dimensions ..................36 Figure 25 :FGM842D Bottom Dimensions (Bottom View) ................. 37 Figure 29 : FGM842D Top and Bottom Views ................... 38 Figure 31 : Recommended Reflow Soldering Thermal Profile ..............40 Figure 32 : Carrier Tape Dimension Drawing (Unit: mm) ................42 Figure 33 : Plastic Reel Dimension Drawing .....................

  • Page 10: Introduction

    RF performance, electrical and mechanical specifications, as well as other related information of the module. Hereby, Quectel Wireless Solutions Co., Ltd. declares that the radio equipment type FGM842D is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: http://www.quectel.com/support/technical.htm...
  • Page 11 Wi-Fi&Bluetooth Module Table 1: Special Mark Mark Definition Brackets ([…]) used after a pin enclosing a range of numbers indicate all pins of the same […] type. For example, SDIO_DATA[0:3] refers to all four SDIO pins: SDIO_DATA0, SDIO_DATA1, SDIO_DATA2, and SDIO_DATA3. FGM842D_Hardware_Design 10 / 50...

  • Page 12: Product Overview

    Support for secondary development Table 2: Basic Information FGM842D Packaging type Pin counts ⚫ Dimensions FGM842D: (12.5 ± 0.2) mm × (13.2 ± 0.2) mm × (1.8 ± 0.2) mm ⚫ Weight FGM842D: Approx. 1.05 g FGM842D_Hardware_Design 11 / 50...

  • Page 13: Key Features

    Temperature Ranges - Storage temperature: -45 to +95 ° TE-B Kit FGM842D-TE-B Antenna/Antenna Interface ⚫ Antenna/Antenna FGM842D RF coaxial connector ⚫ 50 Ω characteristic impedance Interfaces Application Interface Application Interfaces UART, GPIO, SPI, I2C PWM, ADC For more details about the TE-B, see document [1].

  • Page 14: Application Interfaces

    Wi-Fi&Bluetooth Module Series Application Interfaces 3.1. Pin Assignment GPIO9 GPIO7 GPIO6 VBAT GPIO8 RESERVED UART1_TXD GPIO20 UART1_RXD GPIO28 RESERVED RESERVED RESERVED CHIP_EN RESERVED RESERVED GPIO23 RESERVED RESERVED GPIO Power UART Control RESERVED Figure 1:FGM842D Pin Assignment (Top View) FGM842D_Hardware_Design 13 / 50...

  • Page 15: Pin Description

    Power supply for VBAT Vmin = 3.0 V sufficient current of at least the module Vnom = 3.3 V 0.6 A. FGM842D: 1, 2, 11, 14, 36–46, 48–61 FGM842D-P: 1, 2, 11, 14, 36–61 Control Signal FGM842D_Hardware_Design 14 / 50...
  • Page 16 Wi-Fi&Bluetooth Module Series Pin Name Pin No. Description Comment Characteristics Hardware enable. CHIP_EN Enable the module VBAT Internally pulled up to 3.3 V. Active high. UARTs Pin Name Pin No. Description Comment Characteristics UART1_TXD UART1 transmit UART1_RXD UART1 receive VBAT UART2_TXD UART2 transmit UART2_RXD...

  • Page 17: Gpio Multiplexing

    Wi-Fi&Bluetooth Module Series General-purpose GPIO6 input/output General-purpose GPIO7 input/output General-purpose GPIO9 input/output FGM842D RF Antenna Interface Pin Name Pin No. Description Comment Characteristics 50 Ω characteristic Wi-Fi/Bluetooth ANT_WIFI/BT 47 antenna interface impedance. RESERVED Pins Pin Name Pin No. Comment RESERVED 4, 7, 9, 10, 15, 24, 25, 27–29...

  • Page 18: Application Interfaces

    Wi-Fi&Bluetooth Module Series GPIO6 GPIO6 CLK13M PWM0 JTAG_TCK GPIO7 GPIO7 PWM1 JTAG_TMS GPIO8 GPIO8 PWM2 JTAG_TDI CLK26M GPIO9 GPIO9 PWM3 JTAG_TDO GPIO21 GPIO21 UART1_RXD GPIO10 ADC6 UART1_TXD GPIO11 GPIO22 GPIO22 GPIO28 GPIO28 ADC4 GPIO20 GPIO20 ADC3 GPIO24 GPIO24 LPO_CLK PWM4 I2C_SCL ADC2 GPIO26...

  • Page 19: Spi

    Wi-Fi&Bluetooth Module Series UART1_RXD UART1 receive UART2_TXD UART2 transmit UART2_RXD UART2 receive The UART1 can be used for downloading, debugging and AT command communication with the default baud rate of 115200 bps. The UART1 connection between the module and the MCU is illustrated below. Figure 2: UART1 Connection The UART2 can be used for the output of partial logs with the debugging tools, and the default baud rate is 921600 bps.
  • Page 20 Wi-Fi&Bluetooth Module Series Table 8: Pin Definition of SPI Alternate Pin Name Pin No. Description Comment Function In master mode, it is an output signal; GPIO15 SPI_CS SPI chip select In slave mode, it is an input signal. In master mode, it is an output signal;...

  • Page 21: I2C Interface

    Wi-Fi&Bluetooth Module Series 3.4.3. I2C Interface In the case of multiplexing, the module provides 1 I2C interface which supports the master and slave modes. The interface supports standard (up to 100 kbps) and fast (up to 400 kbps) modes with 7-bit addressing.

  • Page 22: Adc Interfaces

    Wi-Fi&Bluetooth Module Series 3.4.5. ADC Interfaces In the case of multiplexing, the module supports up to 6 10-bit ADC interfaces, whose voltage range is 0~3.3 V. To improve ADC accuracy, surround ADC traces with ground. Table 11: Pin Definition of ADC Interfaces Pin Name Pin No.

  • Page 23: Operating Characteristics

    Power supply for the VBAT module FGM842D: 1, 2, 11, 14, 36–46, 48–61 FGM842D-P: 1, 2, 11, 14, 36–46, 48–61 4.1.1. Reference Design for Power Supply The module is powered by VBAT, and it is recommended to use a power supply chip that can provide at least 0.6 A output current.

  • Page 24: Turn On

    Wi-Fi&Bluetooth Module Series Figure 6: Reference Circuit of Power Supply 4.2. Turn On After the module VBAT is powered on, keep the CHIP_EN at high level to realize the automatic startup of the module. Table 14: Pin Definition of CHIP_EN Pin Name Pin No.

  • Page 25: Reset

    Wi-Fi&Bluetooth Module Series 4.3. Reset When the voltage of CHIP_EN drops below 0.3 V or pull CHIP_EN down for at least 1 ms, the module can be reset. The reference design for hardware resetting of the module are shown below. An open collector driving circuit can be used to control the CHIP_EN pin.
  • Page 26 Wi-Fi&Bluetooth Module Series The module reset timing is illustrated in the following figure. VBAT T ≥ 1 ms ≥ 2.4 V CHIP_EN ≤ 0.3 V Figure 10: Reset Timing FGM842D_Hardware_Design 25 / 50...

  • Page 27: Rf Performances

    Wi-Fi&Bluetooth Module Series RF Performances 5.1. Wi-Fi Performances Table 15: Wi-Fi Performances Operating Frequency 2.4 GHz: 2.400–2.4835 GHz Modulation DSSS, CCK, BPSK, QPSK, 16QAM, 64QAM Operating Mode ⚫ ⚫ ⚫ AP + STA Encryption Mode WPA-PSK, WPA2-PSK, WPA3-SAE, AES-128, TRNG Transmission Data Rate ⚫...

  • Page 28: Bluetooth Performances

    Wi-Fi&Bluetooth Module Series ≤ -5 dB 802.11n, HT20 @ MCS 0 ≤ -27 dB 802.11n, HT20 @ MCS 7 5.2. Bluetooth Performances Table 16: Bluetooth Performances Operating Frequency 2.400–2.4835 GHz Modulation GFSK Operating Mode Typ.; Unit: dBm, Tolerance: ± 2 dB Condition (VBAT = 3.3 V;...

  • Page 29: Antenna/Antenna Interfaces

    VSWR Gain (dBi) 1 (Typ.) Max. input power (W) Input impedance (Ω) Polarization type Vertical 5.3.2. FGM842D RF Coaxial Connector 5.3.2.1. Receptacle Specifications The mechanical dimensions of the receptacle supported by the module are as follows. FGM842D_Hardware_Design 28 / 50...

  • Page 30: Antenna Connector Installation

    Wi-Fi&Bluetooth Module Series Figure 11: Dimensions of the Receptacle (Unit: mm) Table 18: Major Specifications of the RF Connector Item Specification Nominal Frequency Range DC to 6 GHz 50 Ω Nominal Impedance Temperature Rating -40 ° C to +105 ° C Meet the requirements of: Voltage Standing Wave Ratio (VSWR) Max.

  • Page 31: Recommended Rf Connector Installation

    Wi-Fi&Bluetooth Module Series Figure 12: Space Factor of the Mated Connectors (Unit: mm) 5.3.2.3. Recommended RF Connector Installation The pictures for plugging in a coaxial cable plug is shown below, θ = 90° is acceptable, while θ ≠ 90° is not.
  • Page 32 Wi-Fi&Bluetooth Module Series Figure 13: Plug in a Coaxial Cable Plug The pictures of pulling out the coaxial cable plug is shown below, θ = 90° is acceptable, while θ ≠ 90° is not. Figure 14: Pull out a Coaxial Cable Plug The pictures of installing the coaxial cable plug with a jig is shown below, θ...

  • Page 33: Recommended Manufacturers Of Rf Connector And Cable

    Wi-Fi&Bluetooth Module Series Figure 15: Install the Coaxial Cable Plug with Jig 5.3.2.4. Recommended Manufacturers of RF Connector and Cable RF connectors and cables by I-PEX are recommended. For more details, visit https://www.i-pex.com. FGM842D_Hardware_Design 32 / 50...

  • Page 34: Electrical Characteristics & Reliability

    Wi-Fi&Bluetooth Module Series Electrical Characteristics & Reliability 6.1. Absolute Maximum Ratings Table 19: Absolute Maximum Ratings (Unit: V) Parameter Min. Max. VBAT -0.3 Voltage at Digital Pins -0.3 Voltage at ADC[1:6] 6.2. Power Supply Ratings Table 20: Module Power Supply Ratings (Unit: V) Parameter Description Condition...

  • Page 35: Power Consumption

    Wi-Fi&Bluetooth Module Series 6.3. Power Consumption 6.3.1. Wi-Fi Power Consumption Table 21: Power Consumption in Non-signaling Mode (Unit: mA) Condition (Typ.) VBAT Tx 1 Mbps @ 18 dBm 267.11 802.11b Tx 11 Mbps @ 18 dBm 271.50 Tx 6 Mbps @ 16 dBm 246.18 2.4 GHz 802.11g...

  • Page 36: Digital I/O Characteristics

    Wi-Fi&Bluetooth Module Series 6.4. Digital I/O Characteristics Table 23: VBAT I/O Requirements (Unit: V) Parameter Description Min. Max. High-level input voltage 0.7 × VBAT VBAT Low-level input voltage 0.3 × VBAT High-level output voltage 0.9 × VBAT Low-level output voltage 0.1 ×...

  • Page 37: Mechanical Information

    This chapter describes the mechanical dimensions of the module. All dimensions are measured in millimeters (mm), and the dimensional tolerances are ± 0.2 mm unless otherwise specified. 7.1. Mechanical Dimensions Figure 16:FGM842D Top and Side Dimensions FGM842D_Hardware_Design 36 / 50...
  • Page 38 Wi-Fi&Bluetooth Module Series Figure 17:FGM842D Bottom Dimensions (Bottom View) NOTE The package warpage level of the module refers to the JEITA ED-7306 standard. FGM842D_Hardware_Design 37 / 50...

  • Page 39: Top And Bottom Views

    7.2. Top and Bottom Views Figure 18: FGM842D Top and Bottom Views NOTE Images above are for illustrative purposes only and may differ from the actual module. For authentic appearance and label, please refer to the module received from Quectel. FGM842D_Hardware_Design 38 / 50...

  • Page 40: Storage, Manufacturing & Packaging

    Wi-Fi&Bluetooth Module Series Storage, Manufacturing & Packaging 8.1. Storage Conditions The module is provided with vacuum-sealed packaging. MSL of the module is rated as 3. The storage requirements are shown below. 1. Recommended Storage Condition: the temperature should be 23 ± 5 ° C and the relative humidity should be 35–60 %.

  • Page 41: Manufacturing And Soldering

    Wi-Fi&Bluetooth Module Series NOTE 1. To avoid blistering, layer separation and other soldering issues, extended exposure of the module to the air is forbidden. 2. Take out the module from the package and put it on high-temperature-resistant fixtures before baking. If shorter baking time is desired, see IPC/JEDEC J-STD-033 for the baking procedure. Pay attention to ESD protection, such as wearing anti-static gloves, when touching the modules.
  • Page 42 Avoid using ultrasonic technology for module cleaning since it can damage crystals inside the module. Due to the complexity of the SMT process, please contact Quectel Technical Support in advance for any situation that you are not sure about, or any process (e.g. selective soldering, ultrasonic soldering) that is not mentioned in document [3].

  • Page 43: Packaging Specification

    The modules are packed in a tape and reel packaging as specified in the sub-chapters below. 8.3.1. Carrier Tape Carrier tape dimensions are illustrated in the following figure and table: Figure 20: Carrier Tape Dimension Drawing (Unit: mm) Table 26: FGM842D Carrier Tape Dimension Table (Unit: mm) 13.6 12.6 14.2 1.75...

  • Page 44: Plastic Reel

    Wi-Fi&Bluetooth Module Series 8.3.2. Plastic Reel Plastic reel dimensions are illustrated in the following figure and table: Figure 21: Plastic Reel Dimension Drawing Table 28: Plastic Reel Dimension Table (Unit: mm) øD1 øD2 32.5 8.3.3. Mounting Direction Figure 22: Mounting Direction FGM842D_Hardware_Design 43 / 50...

  • Page 45: Packaging Process

    Wi-Fi&Bluetooth Module Series 8.3.4. Packaging Process Place the modules onto the carrier tape cavity and cover them securely with cover tape. Wind the heat-sealed carrier tape onto a plastic reel and apply a protective tape for additional protection. 1 plastic reel can pack 1000 modules.

  • Page 46: Appendix References

    Wi-Fi&Bluetooth Module Series Appendix References Table 29: Reference Documents Document Name [1] Quectel_FGM842D_TE-B_User_Guide [2] Quectel_RF_Layout_Application_Note [3] Quectel_Module_SMT_Application_Note Table 30: Terms and Abbreviations Abbreviation Description Analog-to-Digital Converter Advanced Encryption Standard Access Point Bluetooth Low Energy BPSK Binary Phase Shift Keying Complementary Code Keying Charged Device Model DSSS Direct Sequence Spread Spectrum...
  • Page 47 Wi-Fi&Bluetooth Module Series High Throughput Input/Output Inter-Integrated Circuit IEEE Institute of Electrical and Electronics Engineers JTAG Joint Test Action Group Leadless Chip Carrier (package) Mbps Million Bits Per Second Microcontroller Unit MISO Master In Slave Out MOSI Master Out Slave In Over-the-Air Printed Circuit Board Pre-Shared Key...
  • Page 48 Wi-Fi&Bluetooth Module Series Transmit UART Universal Asynchronous Receiver/Transmitter (U)SIM (Universal) Subscriber Identity Module High-level Input Voltage Low-level Input Voltage Vmax Maximum Voltage Vmin Minimum Voltage Vnom Nominal Voltage Value High-level Output Voltage Low-level Output Voltage VSWR Voltage Standing Wave Ratio Wi-Fi Protected Access FGM842D_Hardware_Design 47 / 50...
  • Page 49 Wi-Fi&Bluetooth Module Series FCC Certification Requirements. According to the definition of mobile and fixed device is described in Part 2.1091(b), this device is a mobile device. And the following conditions must be met: 1. This Modular Approval is limited to OEM installation for mobile and fixed applications only. The antenna installation and operating configurations of this transmitter, including any applicable source-based time- averaging duty factor, antenna gain and cable loss must satisfy MPE categorical Exclusion Requirements of 2.1091.
  • Page 50 Wi-Fi&Bluetooth Module Series be included in the manual in that alternative form, provided the user can reasonably be expected to have the capability to access information in that form. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
  • Page 51 Wi-Fi&Bluetooth Module Series certification number”. FGM842D_Hardware_Design 50 / 50...

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