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Summary of Contents for Quectel FCM740D
- Page 1 FCM740D Hardware Design Wi-Fi&Bluetooth Module Series Version: 1.0 Date: 2023-10-09 Status: Released...
- Page 2 Wi-Fi&Bluetooth Module Series 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, Shanghai...
- 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.
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Page 4: Safety Information
Otherwise, Quectel assumes no liability for customers’ failure to comply with these precautions. Full attention must be paid to driving at all times to reduce the risk of an accident. Using a mobile phone while driving (even with a handsfree kit) causes distraction and can lead to an accident. -
Page 5: About The Document
Wi-Fi&Bluetooth Module Series About the Document Revision History Version Date Author Description 2023-10-09 Lisa LI Creation of the document FCM740D_Hardware_Design 5 / 57... -
Page 6: Table Of Contents
Wi-Fi&Bluetooth Module Series Contents Safety Information ..............................4 About the Document ..............................5 Contents ..................................6 Table Index .................................. 8 Figure Index ................................9 1 Introduction ................................10 2 Product Overview ..............................11 2.1. Key Features ..............................11 3 Application Interfaces ............................13 3.1. - Page 7 Wi-Fi&Bluetooth Module Series 6.1. Absolute Maximum Ratings ........................35 6.2. Power Supply Ratings ..........................35 6.3. Wi-Fi Power Consumption .......................... 36 6.4. Digital I/O Characteristics ........................... 36 6.5. ESD Protection ............................37 7 Mechanical Information ............................38 7.1. Mechanical Dimensions ..........................38 7.2.
- Page 8 Wi-Fi&Bluetooth Module Series Table Index Table 1 : Basic Information ..............................11 Table 2 : Key Features ................................ 12 Table 3 : Parameter Description ............................15 Table 4 : Pin Description ..............................15 Table 5 : GPIO Multiplexing .............................. 17 Table 6 : Pin Definition of UART Interfaces ........................
- Page 9 Wi-Fi&Bluetooth Module Series Figure Index Figure 2 : Pin Assignment (Top View) ..........................14 Figure 3 : Main UART Connection ............................ 19 Figure 4 : Debug UART Reference Design ........................20 Figure 5 : SPI Connection ..............................22 Figure 4 : VBAT Reference Circuit ............................ 23 Figure 5 : Turn-on Timing ..............................
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Page 10: Introduction
The document provides a quickly insight into interface specifications, RF performance, electrical and mechanical details, as well as other related information of the module. Hereby, Quectel Wireless Solutions Co., Ltd. declares that the radio equipment type FCM740D is in compliance with Directive 2014/53/EU. -
Page 11: Product Overview
Wi-Fi&Bluetooth Module Series Product Overview FCM740D is a high-performance MCU Wi-Fi 4 and Bluetooth module supporting IEEE 802.11b/g/n and Bluetooth 5.2 standards. The module provides PWM and multiple ADC interfaces for various applications. FCM740D supports either SMT or wave-soldering technology with compact packaging. The general features of the module are as follow: ⚫... - Page 12 Within the operating temperature range, the module’s related performance meets IEEE and Bluetooth specifications. For more details about the EVB. The module is provided with one of the two antenna/antenna interface designs. For more details, please contact Quectel Technical Support.
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Page 13: Application Interfaces
Wi-Fi&Bluetooth Module Series Application Interfaces FCM100D_Hardware_Design 13 / 57... -
Page 14: Pin Assignment
Wi-Fi&Bluetooth Module Series 3.1. Pin Assignment GPIO14 GPIO15 GPIO17 GPIO16 GPIO9 GPIO20 CHIP_EN GPIO22 GPIO23 GPIO28 DBG_RXD MAIN_RXD DBG_TXD MAIN_TXD Control Power UART GPIO Figure 1: Pin Assignment (Top View) NOTE FCM100D_Hardware_Design 14 / 57... -
Page 15: Pin Description
Wi-Fi&Bluetooth Module Series The module provides 14 GPIO interfaces by default. In the case of multiplexing, it can support PWM、 UART、I2C and ADC interfaces. The GND pin should be connected to ground. 3.2. Pin Description Table 3: Parameter Description Parameter Description Digital Input Digital Output... - Page 16 Wi-Fi&Bluetooth Module Series Pin Name Pin No. Description Comment Characteristics Main UART MAIN_TXD transmit VBAT Main UART MAIN_RXD receive Debug UART Pin Name Pin No. Description Comment Characteristics Debug UART DBG_TXD transmit VBAT Test points must be reserved. Debug UART DBG_RXD receive GPIO Interfaces...
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Page 17: Gpio Multiplexing
Wi-Fi&Bluetooth Module Series 3.3. GPIO Multiplexing The module provides 10 GPIO interfaces by default, and can support up to 14 GPIO interfaces in the case of multiplexing. Pins are defined as follows: Table 5: GPIO Multiplexing Pin Name Alternate Alternate Alternate Alternate Alternate... - Page 18 Wi-Fi&Bluetooth Module Series when Bluetooth and Wi-Fi functions coexist. GPIO21 GPIO21 ADC6 I2C1_SDA SPI_CS TMS: JTAG test mode select. BT_ACTIVE: Enable Bluetooth GPIO8 GPIO8 BT_ACTIVE PWM2 function when Bluetooth and Wi-Fi functions coexist. WIFI_ACTIVE: Enable Wi-Fi GPIO7 GPIO7 WIFI_ACTIVE PWM1 function when Bluetooth and Wi-Fi functions coexist.
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Page 19: Application Interfaces
Wi-Fi&Bluetooth Module Series 3.4. Application Interfaces 3.4.1. UART Interfaces The module supports two UART interfaces by default: the main UART and the debug UART. Table 6: Pin Definition of UART Interfaces Pin Name Pin No. Description Comment MAIN_TXD Main UART transmit MAIN_RX Main UART receive DBG_TXD... -
Page 20: Pwm Interfaces
Wi-Fi&Bluetooth Module Series DBG_TXD Test Points DBG_RXD Module Figure 3: Debug UART Reference Design 3.4.2. PWM Interfaces In the case of multiplexing, the module supports maximum 6 PWM channels. Pin description of PWM interfaces are as follows. Table 7: Pin Definition of PWM Interfaces Pin Name Pin No. -
Page 21: Adc Interfaces
Wi-Fi&Bluetooth Module Series 3.4.3. ADC Interfaces In the case of multiplexing, the module supports maximum 5 ADC interfaces, and the voltage range is 0–2.4 V. To improve ADC accuracy, surround ADC trace with ground. Table 8: Pin Definition of ADC Interfaces Pin Name Pin No. -
Page 22: Spi
Wi-Fi&Bluetooth Module Series 3.4.5. SPI In the case of multiplexing, the module provides an SPI that supports both master and slave modes. The maximum clock frequency of the interface can reach 25 MHz, and the received data can be latched on either rising edge or falling edge of clock signal. -
Page 23: Power Supply
Wi-Fi&Bluetooth Module Series 4.1. Power Supply Power supply and ground pins of the module are defined in the following table. Table 12: Pin Definition of Power Supply and GND Pins Pin Name Pin No. Description Min. Typ. Max. Unit VBAT Power supply for the module 4.1.1. -
Page 24: Reset
Wi-Fi&Bluetooth Module Series Table 13: Test Point Definition of CHIP_EN Pin Name Pin No. Description Comment Hardware enable. CHIP_EN Enable the module Internally pulled up to VBAT. Active high. The turn-on timing is shown below: ˂ 10 ms > 5 ms VBAT CHIP_EN Active... - Page 25 Wi-Fi&Bluetooth Module Series Figure 7: Reference Circuit of CHIP_EN by A Using Driving Circuit Another way to control the CHIP_EN is by using a button directly. When pressing the button, an electrostatic strike may generate from finger. Therefore, a TVS component shall be placed near the button for ESD protection. Figure 8: Reference Circuit of CHIP_EN with A Button The module reset timing is illustrated in the following figure.
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Page 26: Download Mode
Wi-Fi&Bluetooth Module Series 4.4. Download Mode Keep the input signal of CHIP_EN at low level during resetting or power-up and the module will enter download mode. In the download mode, the firmware can be download through the main UART. During the hardware design, the CHIP_EN pin of the module is connected to the RTS of the serial port chip, or the CHIP_EN is controlled according to the following waveform, otherwise the download will fail. -
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 BPSK, QPSK, CCK, 16QAM, 64QAM Operating Mode ⚫ ⚫ ⚫ AP + STA Encryption Mode WPA-PSK, WPA2-PSK, WPA3-SAE 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: Pcb Antenna
During PCB design, do not route traces across the RF test point at the bottom of the module to ensure the module The module is provided with one of the two antenna/antenna interface designs. For more details, please contact Quectel Technical Support. -
Page 30: Rf Coaxial Connector
5.3.2. RF Coaxial Connector 5.3.2.1. Receptacle Specifications The mechanical dimensions of the receptacle mounted on the module are as follows. The module is provided with one of the two antenna/antenna interface designs. For more details, please contact Quectel Technical Support. FCM740D_Hardware_Design... -
Page 31: Antenna Connector Installation
Wi-Fi&Bluetooth Module Series Figure 13: Dimensions of the Receptacle (Unit: mm) Table 18: Major Specifications of the RF Connector (Receptacle) 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 32 Wi-Fi&Bluetooth Module Series Figure 14: Dimensions of Mated Plugs (Ø 0.81 Coaxial Cables) (Unit: mm) The following figure illustrates the connection between the receptacle on the module and the mated plug using a Ø 0.81 mm coaxial cable. Figure 15: Space Factor of Mated Connectors (Ø 0.81 mm Coaxial Cables) (Unit: mm) The following figure illustrates the connection between the receptacle mounted on the module and the mated plug using a Ø...
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Page 33: Assemble Coaxial Cable Plug Manually
Wi-Fi&Bluetooth Module Series Figure 16: Space Factor of Mated Connectors (Ø 1.13 mm Coaxial Cables) (Unit: mm) 5.3.2.3. Assemble Coaxial Cable Plug Manually The pictures for plugging in a coaxial cable plug is shown below, θ = 90° is acceptable, while θ ≠ 90° is not. Figure 17: Plug in a Coaxial Cable Plug The pictures of pulling out the coaxial cable plug is shown below, θ... -
Page 34: Assemble Coaxial Cable Plug With Jig
Wi-Fi&Bluetooth Module Series Figure 18: Pull out a Coaxial Cable Plug 5.3.2.4. Assemble Coaxial Cable Plug with Jig The pictures of installing the coaxial cable plug with a jig is shown below, θ = 90° is acceptable, while θ ≠ 90° is not. -
Page 35: 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 ADC1 Voltage at ADC2 Voltage at ADC3 Voltage at ADC4 Voltage at ADC5 6.2. -
Page 36: Wi-Fi Power Consumption
Wi-Fi&Bluetooth Module Series 6.3. Wi-Fi Power Consumption Table 21: Power Consumption in RF Non-signaling Mode (Unit: mA) Condition (VBAT = 3.3 V; Temp.: 25 ° C; Duty Cycle: 99 %) (Typ.) VBAT Tx 1 Mbps @ 16 dBm 802.11b Tx 11 Mbps @ 16 dBm Tx 6 Mbps @ 15 dBm 2.4 GHz 802.11g... -
Page 37: Esd Protection
Wi-Fi&Bluetooth Module Series 6.5. ESD Protection Static electricity occurs naturally and may damage the module. Therefore, applying proper ESD countermeasures and handling methods is imperative. For example, wear anti-static gloves during the development, production, assembly and testing of the module; add ESD protection components to the ESD sensitive interfaces and points in the product design. -
Page 38: Mechanical Information
Wi-Fi&Bluetooth Module Series 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 20: Top and Side Dimensions FCM740D_Hardware_Design / 57... - Page 39 Wi-Fi&Bluetooth Module Series Figure 21: Bottom Dimensions (Bottom View) NOTE The package warpage level of the module refers to the JEITA ED-7306 standard. FCM740D_Hardware_Design / 57...
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Page 40: Recommended Footprint
Wi-Fi&Bluetooth Module Series 7.2. Recommended Footprint FCM740D_Hardware_Design / 57... - Page 41 Wi-Fi&Bluetooth Module Series Figure 22: Recommended Footprint NOTE Keep at least 3 mm between the module and other components on the motherboard to improve soldering quality and maintenance convenience. FCM740D_Hardware_Design / 57...
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Page 42: Top And Bottom Views
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. The RF coaxial connector is not available when the module is designed with a PCB antenna. -
Page 43: 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 44: Manufacturing And Soldering
Wi-Fi&Bluetooth Module Series 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. -
Page 45: Wave Soldering
Wi-Fi&Bluetooth Module Series Table 24: Recommended Thermal Profile Parameters Factor Recommended Value Soak Zone Ramp-to-soak slope 0–3 ° C/s Soak time (between A and B: 150 ° C and 200 ° C) 70–120 s Reflow Zone Ramp-up slope 0–3 ° C/s Reflow time (D: over 217 °... -
Page 46: Manual Soldering
Wi-Fi&Bluetooth Module Series Figure 26: Recommended Lead-free Wave-soldering Thermal Profile Table 25: Recommended Thermal Profile Parameters Factor Recommended Value (Typ.) Preheat ramp-up slope 1–3 ° C/s Preheat peak temperature (Bottom) 95–145 s Peak temperature (Bottom) 240–270 ° C Tin immersion time 2–6 s Tin tab setting temperature 265 ±... -
Page 47: Packaging Specifications
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. -
Page 48: Plastic Reel
Wi-Fi&Bluetooth Module Series 17.7 15.4 14.2 1.75 8.3.2. Plastic Reel Figure 28: Plastic Reel Dimension Drawing Table 28: Plastic Reel Dimension Table (Unit: mm) ø D1 ø D2 32.5 8.3.3. Mounting Direction FCM740D_Hardware_Design / 57... -
Page 49: Packaging Process
Wi-Fi&Bluetooth Module Series Figure 29: Mounting Direction 8.3.4. Packaging Process Place the modules into the carrier tape and use the cover tape to cover them; then wind the heat-sealed carrier tape on the plastic reel and use the protective tape for protection. 1 plastic reel can load 500 modules. - Page 50 Wi-Fi&Bluetooth Module Series Put 4 packaged pizza boxes into 1 carton box and seal it. 1 carton box can pack 2000 modules. Figure 30: Packaging Process FCM740D_Hardware_Design / 57...
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Page 51: Appendix References
Wi-Fi&Bluetooth Module Series Appendix References Table 29: Reference Documents Document Name [1] Quectel_FCM740D_TE-B_User_Guide [2] Quectel_Module_SMT_Application_Note Table 30: Terms and Abbreviations Abbreviation Description Analog-to-Digital Converter Access Point Bluetooth Low Energy BPSK Binary Phase Shift Keying Complementary Code Keying Charged Device Model Dual In-line Package Electrostatic Discharge Error Vector Magnitude... - Page 52 Wi-Fi&Bluetooth Module Series High Throughput IEEE Institute of Electrical and Electronics Engineers Input / Output Mbps Megabits per second Modulation and Coding Scheme Microcontroller Unit Moisture Sensitivity Level Over-The-Air Printed Circuit Board Pre-Shared Key Pulse Width Modulation Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying Random Access Memory...
- Page 53 Wi-Fi&Bluetooth Module Series 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 FCM740D_Hardware_Design 53 / 57...
- Page 54 Wi-Fi&Bluetooth Module Series FCC Statement Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
- Page 55 Wi-Fi&Bluetooth Module Series including the transmitter operation. The host manufacturer has to be aware not to provide information to the end user regarding how to install or remove this 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.
- Page 56 Wi-Fi&Bluetooth Module Series The modular transmitter is only FCC authorized for FCC Part 15 Subpart C 15.247 & 15.209 and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional-radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter...
- Page 57 Wi-Fi&Bluetooth Module Series requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, etc.). Validity of using the module certification: In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization for this module in combination with the host equipment is no longer considered valid and the FCC ID of the module cannot be used on the final product In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization.
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