FC908A Hardware Design Wi-Fi&Bluetooth Module Series Version: 1.0.
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 200233, China Tel: +86 21 5108 6236 Email: info@quectel.com Or our local offices. For more information, please visit: http://www.quectel.com/support/sales.htm.
Wi-Fi&Bluetooth Module Series This document may refer to hardware, software and/or documentation owned by one or more third parties (“third-party materials”). Use of such third-party materials shall be governed by all restrictions and obligations applicable thereto.
Wi-Fi&Bluetooth Module Series Safety Information The following safety precautions must be observed during all phases of operation, such as usage, service or repair of any cellular terminal or mobile incorporating the module. Manufacturers of the cellular terminal shall 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.
Wi-Fi&Bluetooth Module Series About the Document Revision History Version Date Author Description - 2021-12-03 Elinor WANG/Michael DU Creation of the document 1.0.
Wi-Fi&Bluetooth Module Series Contents Safety Information ...................................................................................................................................... 3 About the Document .................................................................................................................................. 4 Contents ......................................................................................................................................................
Wi-Fi&Bluetooth Module Series 4 Electrical Characteristics & Reliability ........................................................................................... 38 4.1. Electrical Characteristics.......................................................................................................... 38 4.2. Digital I/O Interface Characteristics ......................................................................................... 39 4.3. Power Consumption ..........................................
Wi-Fi&Bluetooth Module Series Table Index Table 1: Special Mark................................................................................................................................. 12 Table 2: Key Features ................................................................................................................................ 13 Table 3: I/O Parameters Definition .............................................................................................................
Wi-Fi&Bluetooth Module Series Figure Index Figure 1: Functional Diagram of FC908A ........................................................................ 错误!未定义书签。 Figure 2: Pin Assignment (Top View) ........................................................................................................ 17 Figure 3: VBAT Circuit................................................................................................................................ 21 Figure 4: Power-up Timing ......................
Wi-Fi&Bluetooth Module Series 1 Introduction This document defines the FC908A and describes its air interfaces and hardware interfaces which are connected with your application. This document can help you quickly understand module interface specifications, electrical and mechanical details, as well as other related information of the module. Associated with application notes and user guides, you can use FC908A to design and set up applications easily.
Wi-Fi&Bluetooth Module Series 4. For FCC Part 15.31 (h) and (k): The host manufacturer is responsible for additional testing to verify compliance as a composite system. When testing the host device for compliance with Part 15 Subpart B, the host manufacturer is required to show compliance with Part 15 Subpart B while the transmitter module(s) are installed and operating. The modules should be transmitting and the evaluation should confirm that the module's intentional emissions are compliant (i.e.
Wi-Fi&Bluetooth Module Series Le présent appareil est conforme aux CNR d’ ISED applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes : (1) le dispositif ne doit pas produire de brouillage préjudiciable, et (2) ce dispositif doit accepter tout brouillage reçu, y compris un brouillage susceptible de provoquer un fonctionnement indésirable.
Wi-Fi&Bluetooth Module Series l'intégrateur 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 that 20 cm may be maintained between the antenna and users. The final end product must be labeled in a visible area with the following: “Contains IC: 10224A-2022FC908A”.
Wi-Fi&Bluetooth Module Series 2 Product Overview 2.1. General Description FC908A is a Wi-Fi and Bluetooth module with low power consumption. It is a single-die WLAN (Wireless Local Area Network) and Bluetooth combo solution supporting IEEE 802.11b/g/n 2.4 GHz WLAN standards and Bluetooth 5.1 standard which enables seamless integration of WLAN and Bluetooth low energy technologies. With a SDIO 2.
Wi-Fi&Bluetooth Module Series 1 Wi-Fi Transmitting Power 2.4 GHz: ⚫ 802.11b/11 Mbps: 16 dBm ±1.5 dBm ⚫ 802.11g/54 Mbps: 15 dBm ±1.5 dBm ⚫ 802.11n/HT20 MCS7: 14 dBm ±1.5 dBm Wi-Fi Operation Mode ⚫ ⚫ Wi-Fi Modulation DSSS, OFDM, DBPSK, DQPSK, CCK, BPSK, QPSK, 16QAM, 64QAM WLAN Application Interface SDIO 2.0 Bluetooth Application Interface UART and PCM RF Antenna Interfaces ⚫ ⚫ ANT_WIFI0/BT 50 Ω impedance Physical Characteristics ⚫ ⚫ ⚫ Size: (12.0 ±0.15) mm × (12.0 ±0.15) mm × (1.95 ±0.
Wi-Fi&Bluetooth Module Series 2.3. Functional Diagram NOTE FC908A supports internal crystal or external crystal. 2.4. EVB To help customers to develop applications with FC908A, the evaluation board tools include EVB board (FC908A-M.2 and corresponding TE-A), USB 2.0 data cable, antenna and other external devices used to control and test the module. For details, see document [1].
Wi-Fi&Bluetooth Module Series 3 Application Interfaces 3.1. General Description FC908A is equipped with 44 LCC pins.
Wi-Fi&Bluetooth Module Series 34 BT_EN 35 RESERVED 36 GND 37 RESERVED 38 RESERVED 39 GPIO2 40 GPIO1 41 BT_RTS 42 BT_TXD 43 BT_RXD 44 BT_CTS 3.2.
Wi-Fi&Bluetooth Module Series 3.3. Pin Description The following tables show the pin description of FC908A. Table 3: I/O Parameters Definition Type Description AIO Analog Input/Output DI Digital Input DO Digital Output DIO Digital Input/Output PI Power Input PO Power Output Table 4: Pin Description Power Supply Pin Name Pin No.
Wi-Fi&Bluetooth Module Series SDIO_DATA2 2 14 DIO SDIO data bit 2/NC SDIO_DATA3 15 DIO SDIO data bit 3/NC SDIO_CMD 16 DIO SDIO command SDIO_CLK 17 DI SDIO clock SDIO_DATA0 18 DIO SDIO data bit 0 SDIO_DATA1 19 DIO SDIO data bit 1/IRQ I/O Description Comment VDDIO power domain. Active high. If unused, pull it down. VDDIO power domain. Supports 1-bit or 4-bit mode. Bluetooth Application Interface Pin Name Pin No.
Wi-Fi&Bluetooth Module Series Other Interfaces Pin Name Pin No. I/O Description Comment WLAN_SLP_CLK 24 DI External 32.768 kHz low power clock input XTAL_IN 10 DI Crystal input XTAL_OUT 11 DO Crystal output 40 DIO General-purpose input/output DIO General-purpose input/output Optional. GPIO1 3 GPIO2 39 If unused, keep them open. RESERVED Pin Name Pin No. Comment RESERVED 4, 5, 8, 29, 30,32, 35, 37, 38 Keep them open.
Wi-Fi&Bluetooth Module Series GND 1, 3, 20, 31, 33, 36 Ground The FC908A is powered by VBAT. It is recommended to use a power chip with a maximum output current of more than 0.5 A. To ensure better power supply performance, it is recommended to parallel 100 μF decoupling capacitors and 1 μF and 100 nF filter capacitors near the input of the module VBAT. Meanwhile, it is recommended to add a TVS tube near the VBAT input terminal to improve the surge voltage bearing capacity of the module.
Wi-Fi&Bluetooth Module Series 3.4.2. Buck Circuit Pins Introduction The following table describes the pin definition of the internal buck circuit of the module: Table 6: Definition of Buck Circuit Pins Pin Name Pin No. Description Min. Typ. Max. VIN_LDO_OUT 21 Internal buck output for the module - - - VIN_LDO 23 Internal buck input for the module - 1.
Wi-Fi&Bluetooth Module Series DCR < 0.2 Ω Rated current (based on temperature rise） 1.15 A 3.5. WLAN Application Interface The following figure shows the WLAN application interface connection between FC908A and the host. Host FC908A SDIO SDIO WLAN_EN WLAN_EN WLAN_WAKE WLAN_WAKE Figure 5: WLAN Application Interface Connection 3.5.1. SDIO Interface FC908A is used for SDIO 2.0 interface, supports 1-bit mode or 4-bit mode (automatic detection when SDIO link).
Wi-Fi&Bluetooth Module Series The following figure shows the SDIO interface connection between FC908A and host. VIO NM_10K 10K NM_10K NM_10K NM_10K NM_10K SDIO_CLK SDIO_CLK SDIO_CMD SDIO_CMD SDIO_DATA0 Host FC908A SDIO_DATA0 SDIO_DATA1 SDIO_DATA1 SDIO_DATA2 SDIO_DATA2 SDIO_DATA3 SDIO_DATA3 NM NM NM NM NM NM Figure 6: SDIO Interface Connection To ensure that the interface design complies with the SDIO 2.
Wi-Fi&Bluetooth Module Series 3.5.2. WLAN_EN WLAN_EN is used to control the WLAN function of the module. Wi-Fi function will be enabled when WLAN_EN is at high level. Table 9: Pin Definition of WLAN_EN Pin Name Pin No. I/O Description Comment WLAN_EN 12 DI Wi-Fi function enable control VDDIO power domain. Active high. NOTE WLAN_EN is the Wi-Fi function enable signal. When wiring, keep it away from sensitive signals such as radio frequency, analog signal, clock, and DC-DC noise signals. 3.5.3.
Wi-Fi&Bluetooth Module Series 3.5.4. Introduction of WLAN Pin Multiplexing Function Table 11: Pin setting description SDIO_DATA2 Mode L SPI* Note Sampling at power-on reset. SDIO H As shown in the above table, SDIO and SPI* modes can be configured through SDIO_DATA2. The SPI* function is currently under development. The following is the definition of SPI* pin multiplexing: Table 12: Pin Definition of SDIO Interface Pin Name Pin No.
Wi-Fi&Bluetooth Module Series 3.6. Bluetooth Application Interface The following figure shows the block diagram of Bluetooth application interface connection between FC908A and a host. Host FC908A UART UART PCM PCM BT_EN BT_EN BT_WAKE_HOST Interrupt GPIO1 HOST_WAKE_BT Interrupt GPIO2 Figure 7: Block Diagram of Bluetooth Application Interface Connection 3.6.1. UART Interface FC908A supports an HCI UART as defined in Bluetooth Core Specification Version 5.1.
Wi-Fi&Bluetooth Module Series The voltage range of the Bluetooth UART interface of FC908A is determined by VDDIO. It is necessary to pay attention to whether the voltage range of host and FC908A Bluetooth UART interface is consistent. If necessary, voltage-level translator shall be added. The following figure shows a reference design for UART interface connection between FC908A and host.
Wi-Fi&Bluetooth Module Series 3.6.3. BT_WAKE_HOST and HOST_WAKE_BT BT_WAKE_HOST and HOST_WAKE_BT are used to wake up Bluetooth function. Table 15: Pin Definition of BT_WAKEUP_HOST and HOST_WAKEUP_BT Pin Name Pin No. I/O Description Comment HOST_WAKE_BT 6 DI Host wakes up Bluetooth function BT_WAKE_HOST 7 DO Bluetooth function wakes up host VDDIO power domain. 3.6.4. PCM Interface PCM interface is used for audio over Bluetooth. The following table shows the pin definition of PCM interface.
Wi-Fi&Bluetooth Module Series 3.7. Other Interfaces 3.7.1. WLAN_SLP_CLK The 32.768 kHz sleep clock is used in low power modes, such as IEEE power saving mode and sleep mode. It serves as a timer to determine when to wake up the FC908A to receive signals in various power saving schemes, and to maintain basic logic operations when the module is in sleep mode. Table 17: Pin Definition of WLAN_SLP_CLK Interface Pin Name Pin No. I/O Description WLAN_SLP_CLK 24 DI External 32.
Wi-Fi&Bluetooth Module Series 3.7.2. XTAL_IN/OUT The XTAL_IN and XTAL_OUT pins are external crystal pins, and the recommended crystal frequency is 26 MHz. These pins are optional pins, and the crystal position has been reserved inside the module, and customers can choose according to their needs. The following table is the recommended crystal parameters. It is recommended that customers select the crystal according to the following table: Table 19: XO parameter definition Parameter Min Typ.
Wi-Fi&Bluetooth Module Series 3.8.1. Operating Frequency The operating frequency of FC908A is shown in the following. Table 21: FC908A operating frequency Feature Frequency Unit 2.4 GHz Wi-Fi 2.412–2.462 GHz Bluetooth 2.402–2.480 GHz 3.8.2. Pin Definition of RF Antenna Interface Pin definitions of the antenna interface are shown in the following table: Table 22: Pin Definition of RF Antenna Interfaces Pin Name Pin No.
Wi-Fi&Bluetooth Module Series Figure 10: Reference Design 3.8.4. Reference Design of RF Routing For user’s PCB, the characteristic impedance of all RF traces shall be controlled to 50 Ω. The impedance of the RF traces is usually determined by the trace width (W), the materials’ dielectric constant, the height from the reference ground to the signal layer (H), and the spacing between RF traces and grounds (S).
Wi-Fi&Bluetooth Module Series Figure 13: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) Figure 14: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) To ensure RF performance and reliability, the following principles shall be complied with RF layout design: ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ Use impedance simulation tool to control the characteristic impedance of RF traces to 50 Ω.
Wi-Fi&Bluetooth Module Series 3.8.5. Requirements for Antenna Design The antenna design requirements are as follows: Table 23: Antenna Cable Requirements Type Requirements 2.412–2.484 GHz Cable insertion loss < 1 dB The antenna requirements are as follows: Table 24: Antenna requirements Type Requirements Frequency Range 2.412–2.484 GHz VSWR <2 Gain (dBi) Typ.
Wi-Fi&Bluetooth Module Series 3.8.6. RF Connector Recommendation If RF connector is used for antenna connection, it is recommended to use the U.FL-R-SMT connector provided by HIROSE. Figure 15: Dimensions of the U.FL-R-SMT Connector (Unit: mm) U.FL-LP serial connectors listed in the following figure can be used to match the U.FL-R-SMT Figure 16: Mechanicals of U.
Wi-Fi&Bluetooth Module Series The following figure describes the space factor of mated connector.
Wi-Fi&Bluetooth Module Series 4 Electrical Characteristics & Reliability 4.1. Electrical Characteristics The following table shows the absolute maximum ratings. Table 25: Absolute Maximum Ratings Parameter Min. Max. Unit VBAT -0.3 5.5 V Digital I/O Input Voltage -0.3 3.9 V The following table shows the recommended operating conditions of the module. Table 26: Recommended Operating Conditions Parameter Min. Typ. Max. Unit VBAT 3.0 3.6 4.8 V VDDIO 1.71 1.8/3.3 3.
Wi-Fi&Bluetooth Module Series 4.2. Digital I/O Interface Characteristics The following table shows the general DC electrical characteristics over recommended operating conditions (unless otherwise specified). Table 27: General DC Electrical Characteristics for 1.8 V Domain Symbol Parameter Min. Max. Unit VIH High-level Input Voltage 0.65 × VDDIO - V VIL Low-level Input Voltage - 0.35 × VDDIO V VOH High-level Output Voltage VDDIO - 0.45 - V VOL Low-level Output Voltage - 0.
Wi-Fi&Bluetooth Module Series TX 11 Mbps @ 16 dBm 271 0.46 mA TX 6 Mbps @ 15 dBm 270 0.46 mA TX 54 Mbps @15 dBm 197 0.46 mA TX MCS0 @ 14 dBm 258 0.46 mA TX MCS7 @ 14 dBm 186 0.46 mA 802.11g 802.11n HT20 4.4. RF Performance The following tables summarize the transmitting and receiving performances of FC908A. 4.4.1. Conducted RF Performance of Wi-Fi Table 30: Conducted RF Output Power at 2.4 GHz Wi-Fi Description Min. Typ. Unit 802.11b @ 1 Mbps 14.5 16 dBm 802.
Wi-Fi&Bluetooth Module Series 802.11g @ 54 Mbps -76 dBm 802.11n, HT20 @ MCS0 -91 dBm 802.11n, HT20 @ MCS7 -73 dBm 4.4.2. Conducted RF Performance of Bluetooth Table 32: Conducted RF Performance of Bluetooth Description Transmitting Power (Typ.) Receiving Sensitivity (Typ.) Unit BR 8 -89 dBm EDR (π/4-DQPSK) 8 -91 dBm EDR (8DPSK) 8 -84 dBm BLE 8 -90 dBm 4.5.
Wi-Fi&Bluetooth Module Series 5 Mechanical Information This chapter describes the mechanical dimensions of FC908A. All dimensions are measured in millimeter (mm), and the dimensional tolerances are ±0.2 mm unless otherwise specified. 5.1.
Wi-Fi&Bluetooth Module Series Pin 1 Figure 19: Bottom Dimension (Top View) NOTE The package warpage level of the module conforms to JEITA ED-7306 standard.
Wi-Fi&Bluetooth Module Series 5.2. Recommended Footprint Figure 20: Recommended Footprint (Top View) NOTE Keep at least 3 mm between the module and other components on the motherboard to improve soldering quality and maintenance convenience.
Wi-Fi&Bluetooth Module Series 5.3. Top and Bottom Views Figure 21: Top and Bottom Views of the Module NOTE Images above are for illustration purpose only and may differ from the actual module. For authentic appearance and label, refer to the module received from Quectel.
Wi-Fi&Bluetooth Module Series 6 Storage, Manufacturing & Packaging 6.1. 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 shall be 23 ±5 °C and the relative humidity shall be 35–60 %. 2. The storage life (in vacuum-sealed packaging) is 12 months in Recommended Storage Condition. 3.
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. All modules must be soldered to PCB within 24 hours after the baking, otherwise put them in the drying oven. If shorter baking time is desired, see IPC/JEDEC J-STD-033 for the baking procedure. 3.
Wi-Fi&Bluetooth Module Series Table 34: Recommended Thermal Profile Parameters Factor Recommendation Soak Zone Max slope 1–3 °C/s Soak time (between A and B: 150 °C and 200 °C) 70–120 s Reflow Zone Max slope 2–3 °C/s Reflow time (D: over 217 °C) 40–70 s Max temperature 235 °C to 246 °C Cooling down slope -1.5 to -3 °C/s Reflow Cycle Max reflow cycle 1 NOTE 1.
Wi-Fi&Bluetooth Module Series 6.3. Packaging Specifications The module adopts carrier tape packaging and details are as follow: 6.3.1. Carrier Tape Dimension details are as follow: Figure 23: Carrier Tape Dimension Drawing Table 35: Carrier Tape Dimension Table (Unit: mm) W P T A0 B0 K0 K1 F E 24 16 0.35 12.4 12.4 2.6 3.6 11.5 1.75 6.3.2.
Wi-Fi&Bluetooth Module Series Table 36: Plastic Reel Dimension Table (Unit: mm) øD1 øD2 W 330 100 24.5 6.3.3. Packaging Process Place the module into the carrier tape and use the cover tape to cover it; then wind the heat-sealed carrier tape to the plastic reel and use the protective tape for protection. 1 plastic reel can load 500 modules. Place the packaged plastic reel, humidity indicator card and desiccant bag into a vacuum bag, vacuumize it.
Wi-Fi&Bluetooth Module Series 7 Appendix References Table 37: Related Documents SN Document Name [1] Quectel_UMTS<E_EVB_User_Guide [2] Quectel_RF_Layout_Application_Note [3] Quectel_Module_Secondary_SMT_Application_Note Table 38: Terms and Abbreviations Abbreviation Description AP Access Point BLE Bluetooth Low Energy BPSK Binary Phase Shift Keying BT Bluetooth CCK Complementary Code Keying CTS Clear To Send DQPSK Differential Quadrature Reference Phase Shift Keying GATT Generi
Wi-Fi&Bluetooth Module Series Mbps Million Bits Per Second QAM Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying RF Radio Frequency RoHS Restriction of Hazardous Substances STA Spike-triggered average RTS Request to Send RXD Receive Data TBD To Be Determined TXD Transmit Data UART Universal Asynchronous Receiver/Transmitter USB Universal Serial Bus VIHmax Maximum High-level Input Voltage VIHmin Minimum High-level Input Voltage VILmax Maximum Low-level Input Vol
