SC20-WL Hardware Design Smart Wi-Fi Module Series Rev: SC20-WL_Hardware_Design_V1.0 Date: 2019-12-16 www.quectel.
Smart Wi-Fi Module Series SC20-WL Hardware Design Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters: Quectel Wireless Solutions Co., Ltd. Building 5, Shanghai Business Park Phase III (Area B), No.1016 Tianlin Road, Minhang District, Shanghai, China 200233 Tel: +86 21 5108 6236 Email: info@quectel.com Or our local office. For more information, please visit: http://www.quectel.com/support/sales.
Smart Wi-Fi Module Series SC20-WL Hardware Design About the Document History Revision Date Author Description 1.0 2019-12-16 Quinn.
Smart Wi-Fi Module Series SC20-WL Hardware Design Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ............................................................................................................................
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.21. Audio Interfaces ....................................................................................................................... 57 3.21.1. Reference Circuit Design for Microphone ...................................................................... 58 3.21.2. Reference Circuit Design for Receiver Interface ........................................................... 58 3.21.3. Reference Circuit Design for Headphone Interface .................
Smart Wi-Fi Module Series SC20-WL Hardware Design Table Index TABLE 1: SC20-WL FREQUENCY BANDS ...................................................................................................... 13 TABLE 2: SC20-WL KEY FEATURES ............................................................................................................... 14 TABLE 3: I/O PARAMETERS DEFINITION .......................................................................................................
Smart Wi-Fi Module Series SC20-WL Hardware Design Figure Index FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 17 FIGURE 2: PIN ASSIGNMENT (TOP VIEW)..................................................................................................... 19 FIGURE 3: VOLTAGE DROP SAMPLE.............................................................................................................
Smart Wi-Fi Module Series SC20-WL Hardware Design FIGURE 40: TOP VIEWS OF THE MODULE ................................................................................................... 77 FIGURE 41: BOTTOM VIEW OF THE MODULE .............................................................................................. 77 FIGURE 42: REFLOW SOLDERING THERMAL PROFILE .............................................................................. 79 FIGURE 43: TAPE DIMENSIONS ...................................
Smart Wi-Fi Module Series SC20-WL Hardware Design OEM/Integrators Installation Manual Important Notice to OEM integrators 1. This module is limited to OEM installation ONLY. 2. This module is limited to installation in mobile or fixed applications, according to Part 2.1091(b). 3. The separate approval is required for all other operating configurations, including portable configurations with respect to Part 2.1093 and different antenna configurations 4. For FCC Part 15.
Smart Wi-Fi Module Series SC20-WL Hardware Design installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver.
Smart Wi-Fi Module Series SC20-WL Hardware Design bande 5725-5825 MHz doit être conforme à la norme e.i.r.p. les limites spécifiées pour un fonctionnement point à point et non point à point, selon le cas CAN ICES-3(B)/ NMB-3(B) Radiation Exposure Statement This equipment complies with FCC/IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20 cm between the radiator & your body.
Smart Wi-Fi Module Series SC20-WL Hardware Design 1 Introduction This document defines the SC20-WL module, its air interface and hardware interface which are connected with customers’ application. This document can help customers quickly understand module interface specifications, electrical and mechanical details as well as other related information of SC20-WL module. Associated with application notes and user guides, customers can use SC20-WL module to design and set up mobile applications easily. 1.
Smart Wi-Fi Module Series SC20-WL Hardware Design unpaid bills or with an invalid (U)SIM card). When emergent help is needed in such conditions, please remember using emergency call. In order to make or receive a call, the cellular terminal or mobile must be switched on in a service area with adequate cellular signal strength. The cellular terminal or mobile contains a transmitter and receiver. When it is ON, it receives and transmits radio frequency signals.
Smart Wi-Fi Module Series SC20-WL Hardware Design 2 Product Concept 2.1. General Description SC20-WL is a series of Smart Wi-Fi module based on Qualcomm platform and Linux operating system, and provides industrial grade performance. Its general features are listed below: Support short-range wireless communication via Support multiple audio and video codecs. Built-in high performance AdrenoTM 304 graphics Enable smooth play of 720P videos.
Smart Wi-Fi Module Series SC20-WL Hardware Design 2.2. Key Features The following table describes the detailed features of SC20-WL module. Table 2: SC20-WL Key Features Feature Details Applications Processor ARM Cortex-A7 microprocessor cores (quad-core) up to 1.1 GHz 512KB L2 cache Modem DSP QDSP6 v5 core up to 691.2MHz 768KB L2 cache Memory 8GB eMMC + 8Gb LPDDR3 16GB eMMC + 16Gb LPDDR3 Operating System Linux Power Supply Supply voltage: 3.5V~4.2V Typical supply voltage: 3.
Smart Wi-Fi Module Series SC20-WL Hardware Design VP8 –1080P @30 fps (HEVC) H.265 MP 8 bit –1080P @30fps Audio Interfaces Audio input: 2 groups of analog microphone input, integrating internal bias voltage Audio output: Class AB stereo headphone output Class AB earpiece differential output Class D speaker differential amplifier output Audio Codec HR, FR, EFR, AMR, AMR-WB USB Interface Compliant with USB 2.
Smart Wi-Fi Module Series SC20-WL Hardware Design NOTES 1. 1) Within operation temperature range, the module is IEEE specifications. 2. 2) Within extended temperature range, the module remains the ability for data transmission. There is no unrecoverable malfunction. There are also no effects on radio spectrum and no harm to radio network. Only one or more parameters like Pout might reduce in their value and exceed the specified tolerances.
Smart Wi-Fi Module Series SC20-WL Hardware Design ANT_WIFI/BT SAW VBAT_BB USB_VBUS WCN LPDDR3+ EMMC VRTC PWRKEY PMIC RESET_N Baseband AUDIO 19.2M XO ADC LDO Output LCM (MIPI) TP CAM (MIPI) USB UART SD I2C GPIO Card Figure 1: Functional Diagram 2.4. Evaluation Board In order to help customers to develop applications with SC20-WL, Quectel supplies the evaluation board (Smart-EVB), RS-232 to USB cable, USB data cable, earphone, antenna and other peripherals to control or test the module.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3 Application Interfaces 3.1. General Description SC20-WL is equipped with 146-pin 1.0mm pitch SMT pads plus 64-pin ground/reserved pads that can be embedded into wireless application platforms. The following chapters provide the detailed description of pins/interfaces listed below.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.2.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.3. Pin Description The following tables show the SC20-WL’s pin definition. Table 3: I/O Parameters Definition Type Description IO Bidirectional DI Digital input DO Digital output PI Power input PO Power output AI Analog input AO Analog output OD Open drain The following tables show the SC20-WL’s pin definition and electrical characteristics. Table 4: Pin Description Power Supply Pin Name Pin No.
Smart Wi-Fi Module Series SC20-WL Hardware Design pull up circuits and level conversion circuit. LDO6_1V8 125 PO 1.8V output power supply Vnorm=1.8V IOmax=100mA Power supply for peripherals. 2.2uF~4.7uF capacitor is recommended to be applied to the LDO6_1V8 pin. If unused, keep this pin open. Power supply for peripherals. 2.2uF~4.7uF capacitor is recommended to be applied to the LDO17_2V85 pin. If unused, keep this pin open. LDO17_ 2V85 129 PO 2.85V output power supply Vnorm=2.
Smart Wi-Fi Module Series SC20-WL Hardware Design Audio Interfaces Pin Name Pin No.
Smart Wi-Fi Module Series SC20-WL Hardware Design UART1_ TXD UART1_ RXD UART1_ CTS UART1_ RTS UART2_ RXD UART2_ TXD 34 35 36 37 93 94 DO DI DI UART1 transmit data UART1 receive data UART1 clear to send VOLmax=0.45V VOHmin=1.35V 1.8V power domain. If unused, keep this pin open. VILmax=0.63V VIHmin=1.17V 1.8V power domain. If unused, keep this pin open. VILmax=0.63V VIHmin=1.17V 1.8V power domain. If unused, keep this pin open. VOLmax=0.45V VOHmin=1.35V 1.8V power domain.
Smart Wi-Fi Module Series SC20-WL Hardware Design VOLmax=0.37V VOHmin=2.2V SD_DATA0 41 IO SD_DATA1 42 IO SD_DATA2 43 IO High speed bidirectional digital signal lines of SD card 1.8V SD card: VILmax=0.58V VIHmin=1.27V VOLmax=0.45V VOHmin=1.4V 2.95V SD card: VILmax=0.73V VIHmin=1.84V VOLmax=0.37V VOHmin=2.2V SD_DATA3 44 IO SD_DET 45 DI SD card insertion detection VILmax=0.63V VIHmin=1.17V Active low Touch Panel (TP) Interface Pin Name Pin No.
Smart Wi-Fi Module Series SC20-WL Hardware Design MIPI_DSI_ LN0N 54 AO MIPI DSI data signal (negative) MIPI_DSI_ LN0P 55 AO MIPI DSI data signal (positive) MIPI_DSI_ LN1N 56 AO MIPI DSI data signal (negative) MIPI_DSI_ LN1P 57 AO MIPI DSI data signal (positive) MIPI_DSI_ LN2N 58 AO MIPI DSI data signal (negative) MIPI_DSI_ LN2P 59 AO MIPI DSI data signal (positive) MIPI_DSI_ LN3N 60 AO MIPI DSI data signal (negative) MIPI_DSI_ LN3P 61 AO MIPI DSI data signal (positive) I/O
Smart Wi-Fi Module Series SC20-WL Hardware Design MCLK camera VOHmin=1.35V CAM1_ MCLK 75 DO Clock signal of front camera VOLmax=0.45V VOHmin=1.35V CAM0_RST 79 DO Reset signal of rear camera VOLmax=0.45V VOHmin=1.35V CAM0_ PWD 80 DO Power down signal of rear camera VOLmax=0.45V VOHmin=1.35V CAM1_RST 81 DO Reset signal of front camera VOLmax=0.45V VOHmin=1.35V CAM1_PW D 82 DO Power down signal of front camera VOLmax=0.45V VOHmin=1.
Smart Wi-Fi Module Series SC20-WL Hardware Design VBAT_ THERM 134 AI Battery temperature detection Antenna Interface Pin Name Pin No. I/O Description DC Characteristics ANT_ Wi-Fi/BT 77 IO Wi-Fi/BT antenna 50Ω impedance DC Characteristics Comment GPIO Interfaces Pin Name Pin No. I/O Description GPIO_23 33 IO GPIO 1.8V power domain GPIO_32 90 IO GPIO 1.8V power domain GPIO_31 97 IO GPIO 1.8V power domain GPIO_92 98 IO GPIO 1.
Smart Wi-Fi Module Series SC20-WL Hardware Design GPIO_95 115 IO GPIO 1.8V power domain GPIO_11 116 IO GPIO Multiplexed into SPI_CLK. GPIO_10 117 IO GPIO Multiplexed into SPI_CS_N. GPIO_9 118 IO GPIO Multiplexed into SPI_MISO. GPIO_8 119 IO GPIO Multiplexed into SPI_MOSI GPIO_16 123 IO GPIO 1.8V power domain GPIO_17 124 IO GPIO 1.8V power domain I/O Description Other Interfaces Pin Name VIB_DRV RESET_N USB_BOOT CHARGE_ SEL Pin No.
Smart Wi-Fi Module Series SC20-WL Hardware Design 145, 146, 151, 152, 153, 154, 155, 156, 157, 158, 159, 183, 187, 190, 191, 194, 195, 196, 197, 199, 202, 203, 204, 205, 206, 207, 210 NOTE 1) GPIO_68 and GPIO_88 cannot be pulled up during start-up. 3.4. Power Supply 3.4.1. Power Supply Pins SC20-WL provides two VBAT pins dedicated to connection with the external power supply. The two VBAT_BB pins are used for module’s baseband part. The power supply range of the module is 3.5V~4.
Smart Wi-Fi Module Series SC20-WL Hardware Design Input current 3.8V Voltage 3.1V Figure 3: Voltage Drop Sample To decrease voltage drop, a bypass capacitor of about 100µF with low ESR (ESR=0.7Ω) should be used, and a multi-layer ceramic chip (MLCC) capacitor should also be reserved due to its ultra-low ESR. It is recommended to use a ceramic capacitor (100nF) for the VBAT pins. The width of VBAT_BB trace should be no less than 1mm. In principle, the longer the VBAT trace is, the wider it will be.
Smart Wi-Fi Module Series SC20-WL Hardware Design The following figure shows a reference design for +5V input power source which adopts an LDO (MIC29302WU) from MICREL. The typical output voltage is 3.8V and the maximum rated current is 3.0A. MIC29302WU U1 DC_IN VBAT 470uF 100nF 51K ADJ GND 5 C1 OUT 4 3 R1 1 C2 EN 2 IN R2 100K 1% R3 47K 1% R4 470R C3 C4 470uF 100nF Figure 5: Reference Circuit of Power Supply NOTES 1.
Smart Wi-Fi Module Series SC20-WL Hardware Design PWRKEY ≥1.6s R1 Q1 4.7K Turn on pulse R2 47K Figure 6: Turn on the Module Using Driving Circuit The other way to control the PWRKEY is using a button directly. A TVS component is indispensable to be placed nearby the button for ESD protection. A reference circuit is shown in the following figure.
Smart Wi-Fi Module Series SC20-WL Hardware Design The turn on scenario is illustrated in the following figure. VBAT (Typ.: 3.8V) PWRKEY ≥1.6s 173ms LDO5_1V8 173.5ms LDO6_1V8 LDO17_2V85 Others 438ms 40s Active Figure 8: Timing of Turning on Module NOTES 1. When the module is powered on for the first time, its timing of turning on will be 45ms longer than that shown above. 2. Make sure that VBAT is stable before pulling down PWRKEY pin. The recommended time between them is no less than 30ms.
Smart Wi-Fi Module Series SC20-WL Hardware Design VBAT >8s PWRKEY Others Power down Figure 9: Timing of Turning off Module 3.6. VRTC Interface The RTC (Real Time Clock) can be powered by an external power source through VRTC when the module is powered down and there is no power supply for the VBAT. The external power source can be capacitor or rechargeable battery (such as coil cells) according to application demands.
Smart Wi-Fi Module Series SC20-WL Hardware Design If RTC is ineffective, it can be synchronized through network after the module is powered on. 2.0V~3.25V input voltage range and 3.0V typical value for VRTC. When VBAT is disconnected, the average consumption is typically 5uA. When powered by VBAT, the RTC error is 50ppm. When powered by VRTC, the RTC error is 200ppm.
Smart Wi-Fi Module Series SC20-WL Hardware Design system will switch to CC mode. The maximum charging current is 1.44A when adapter is used for battery charging; and the maximum charging current is 450mA while USB charging. Constant voltage mode (CV mode): When the battery voltage reaches the final value 4.2V, the system will switch to CV mode and the charging current will decrease gradually. When the battery level reaches 100%, the charging is completed.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.9. USB Interface SC20-WL contains one integrated Universal Serial Bus (USB) interface which complies with the USB 2.0 specification and supports high speed (480 Mbps) and full speed (12 Mbps) modes. The USB interface is used for AT command communication, data transmission, software debugging and firmware upgrade. The following table shows the pin definition of USB interface. Table 6: Pin Definition of USB Interface Pin Name Pin No.
Smart Wi-Fi Module Series SC20-WL Hardware Design L1 10uF 1 VOUT VOUT AW3605DNR EN NC R1 10K D5 C2 6 22uF/ 10V 9 GND 8 GND 2 3 9 U1 VBAT 7 8 GPIO 1 VUSB 2 USB_DM 3 USB_DP 4 USB_ID 5 GND USB_VUSB USB_DM USB_DP USB_ID C3 D1 D2 D3 D4 100nF ESD ESD ESD ESD 6 Module GND GND 1.0uH SW VIN 7 C1 4 5 AGND PGND PGND VBAT Figure 14: USB Interface Reference Design (OTG is Supported) SC20-WL supports OTG protocol.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.10. UART Interfaces The module provides two UART interfaces: UART1: 4-wire UART interface which supports hardware flow control UART2: 2-wire UART interfaces and is used for debugging Table 8: Pin Description of UART Interfaces Pin Name Pin No I/O Description Comment UART1_TXD 34 DO UART1 transmit data 1.8V power domain. If it is unused, keep it open. UART1_RXD 35 DI UART1 receive data 1.8V power domain. If it is unused, keep it open.
Smart Wi-Fi Module Series SC20-WL Hardware Design The following figure is an example of connection between SC20-WL and PC. A voltage level translator and a RS-232 level translator chip are also recommended to be added between the module and PC, as these two UART interfaces do not support the RS-232 level, while support the 1.8V CMOS level only. 1.8V OE VCCA UART1_TXD UART1_RTS TXD_1.8V RTS_1.8V 3.3V VCCB TXD_3.3V RTS_3.3V UART1_RXD RXD_1.8V RXD_3.3V UART1_CTS CTS_1.8V CTS_3.
Smart Wi-Fi Module Series SC20-WL Hardware Design SD_CMD 40 I/O SD_DATA0 41 I/O SD_DATA1 42 I/O SD_DATA2 43 I/O SD_DATA3 44 I/O SD_DET 45 DI Command signal of SD card High speed bidirectional digital signal lines of SD card SD card insertion detection Active low A reference circuit for SD card interface is shown as below.
Smart Wi-Fi Module Series SC20-WL Hardware Design signal line traces should not exceed 1mm. Table 10: SDIO Trace Length Inside the Module Pin No. Signal Length (mm) 39 SD_CLK 14.60 40 SD_CMD 14.55 41 SD_DATA0 14.53 42 SD_DATA1 14.56 43 SD_DATA2 14.53 44 SD_DATA3 14.57 Comment 3.12. GPIO Interfaces SC20-WL has abundant GPIO interfaces with power domain of 1.8V. The pin definition is listed below.
Smart Wi-Fi Module Series SC20-WL Hardware Design 47 TP_I2C_SCL GPIO_19 B-PD: nppukp 48 TP_I2C_SDA GPIO_18 B-PD: nppukp 49 LCD_RST GPIO_25 B-PD: nppukp 50 LCD_TE GPIO_24 B-PD: nppukp 74 CAM0_CLK GPIO_26 B-PD: nppukp 75 CAM1_CLK GPIO_27 B-PD: nppukp 79 CAM0_RST GPIO_35 B-PD: nppukp Wakeup 80 CAM0_PWD GPIO_34 B-PD: nppukp Wakeup 81 CAM1_RST GPIO_28 B-PD: nppukp Wakeup 82 CAM1_PWD GPIO_33 B-PD: nppukp 83 CAM_I2C_SCL GPIO_30 B-PD: nppukp 84 CAM_I2C_SDA GPIO_29
Smart Wi-Fi Module Series SC20-WL Hardware Design 103 GPIO_97 GPIO_97 B-PD: nppukp Wakeup 104 GPIO_110 GPIO_110 B-PD: nppukp Wakeup 105 GPIO_0 GPIO_0 B-PD: nppukp 106 GPIO_98 GPIO_98 B-PD: nppukp Wakeup 107 GPIO_94 GPIO_94 B-PD: nppukp Wakeup 108 GPIO_36 GPIO_36 B-PD: nppukp Wakeup 109 GPIO_65 GPIO_65 B-PD: nppukp Wakeup 110 GPIO_96 GPIO_96 B-PD: nppukp Wakeup 112 GPIO_58 GPIO_58 B-PD: nppukp Wakeup 113 GPIO_99 GPIO_99 B-PD: nppukp 115 GPIO_95 GPIO_95 B-PD
Smart Wi-Fi Module Series SC20-WL Hardware Design SC20-WL provides one SPI interface multiplexed from GPIO interfaces. The interface only supports the master mode. Table 12: Pin Definition of SPI Interface Pin Name Pin No I/O Comment Description GPIO_8 119 IO GPIO by default. Can be multiplexed into SPI_MOSI. Master out slave in of SPI GPIO_9 118 IO GPIO by default. Can be multiplexed into SPI_MISO. Master in slave out of SPI GPIO_10 117 DO GPIO by default.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.15. ADC Interfaces SC20-WL provides three analog-to-signal converter (ADC) interfaces, and the pin definition is shown below. Table 14: Pin Definition of ADC Interfaces Pin Name Pin No I/O Description Comment ADC 128 AI General purpose ADC Max input voltage is 1.7V VBAT_SNS 133 AI Input voltage sense Max input voltage is 4.5V VBAT_THERM 134 AI Battery temperature detection Internal pull-up.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3V3 1 C1 C2 1uF NM D1 Motor 4 VIB_DRV VIB+ VIB- Module Figure 18: Reference Circuit for Motor Connection When the motor stops, the redundant electricity can be discharged from the circuit loop formed by diodes, thus avoiding component damages. 3.17. LCM Interface SC20-WL module provides an LCM interface meeting MIPI DSI specification.
Smart Wi-Fi Module Series SC20-WL Hardware Design MIPI_DSI_CLKN 52 AO MIPI DSI clock signal (negative) MIPI_DSI_CLKP 53 AO MIPI DSI clock signal (positive) MIPI_DSI_LN0N 54 AO MIPI DSI data signal (negative) MIPI_DSI_LN0P 55 AO MIPI DSI data signal (positive) MIPI_DSI_LN1N 56 AO MIPI DSI data signal (negative) MIPI_DSI_LN1P 57 AO MIPI DSI data signal (positive) MIPI_DSI_LN2N 58 AO MIPI DSI data signal (negative) MIPI_DSI_LN2P 59 AO MIPI DSI data signal (positive) MIPI_DSI_LN
Smart Wi-Fi Module Series SC20-WL Hardware Design LDO17_2V85 LDO6_1V8 1 2 3 4 5 6 LCM_LED+ LCM_LEDLCD_TE LCD_RST C1 C2 4.
Smart Wi-Fi Module Series SC20-WL Hardware Design VBAT PWM Backlight driving circuit 29 LCM_LED+ LCM_LED- C1 2.2uF Module Figure 20: Reference Design for Backlight Dirving Circuit 3.18. Touch Panel Interface SC20-WL provides a set of I2C interface for connection with Touch Panel (TP), and also provides the corresponding power supply and interrupt pins. The definition of TP interface pins is illustrated below.
Smart Wi-Fi Module Series SC20-WL Hardware Design The following illustrates a TP interface reference circuit, by taking the connection with TP interface on LHR050H41-00 (IC: GT9147) from HUARUI Lighting as an example. LDO17_2V85 LDO6_1V8 R1 R2 2.2K 2.2K 1 2 3 4 5 6 TP_I2C_SDA TP_I2C_SCL TP_RST TP_INT D1 D2 D3 D4 C1 C2 SCL 1.8V RESET 1.8V INT 1.8V GND VDD 2.8V D5 4.7uF 100nF Module SDA 1.8V TP Figure 21: Reference Circuit Design for TP Interface 3.19.
Smart Wi-Fi Module Series SC20-WL Hardware Design Table 18: Pin Definition of Rear Camera Interface Pin Name LDO6_1V8 Pin No 125 I/O Description Comment PO 1.8V output power supply for DOVDD of camera 1.8V normal voltage. Vnorm=1.8V IOmax=100mA 2.85V normal voltage. Vnorm=2.85V IOmax=300mA LDO17_2V85 129 PO 2.
Smart Wi-Fi Module Series SC20-WL Hardware Design DVDD_1V2 VDD_AF_2V8 LDO6_1V8 C1 1uF 1uF R2 2.2K 1 2 MIPI_CSI0_LN1N 100nF 3 6 2.
Smart Wi-Fi Module Series SC20-WL Hardware Design IOmax=100mA LDO17_2V85 129 PO 2.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.19.3. Design Considerations Special attention should be paid to the definition of video device interface in schematic design. Different video devices will have varied definitions for their corresponding connectors. Assure the device and the connectors are correctly connected. MIPI are high speed signal lines, supporting maximum data rate up to 1.5Gbps. The differential impedance should be controlled as 100Ω.
Smart Wi-Fi Module Series SC20-WL Hardware Design 65 MIPI_CSI0_LN0N 12.13 0.40 66 MIPI_CSI0_LN0P 12.53 67 MIPI_CSI0_LN1N 13.73 68 MIPI_CSI0_LN1P 14.49 70 MIPI_CSI1_CLKN 17.32 0.76 0.13 71 MIPI_CSI1_CLKP 17.45 72 MIPI_CSI1_LN0N 18.89 73 MIPI_CSI1_LN0P 19.24 0.35 3.20. Sensor Interfaces SC20-WL module supports communication with sensors via I2C interface, and it supports ALS/PS, compass, G-sensor, and gyroscopic sensors.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.21. Audio Interfaces SC20-WL module provides two analog input channels and three analog output channels. The following table shows the pin definition.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.21.1. Reference Circuit Design for Microphone MIC1P MIC_GND F1 0R C1 F2 NC MIC 0R D1 C3 Module 100pF Figure 24: Reference Circuit Design for Microphone Interface 3.21.2.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.21.3. Reference Circuit Design for Headphone Interface R1 MIC_GND C1 NM MIC2P 0R 0R C2 NM R3 0R HPH_L F1 0R F2 0R F3 0R 1 5 4 6 3 2 R4 HS_DET HPH_R HPH_GND R2 20K F4 Module 0R C3 C4 NM NM C5 D1 D2 D3 D4 NM ESD Figure 26: Reference Circuit Design for Headphone Interface 3.21.4.
Smart Wi-Fi Module Series SC20-WL Hardware Design 3.22. Emergency Download Interface USB_BOOT is an emergency download interface. Pull up to LDO5_1V8 during power-up will force the module enter into emergency download mode. This is an emergency option when there are failures such as abnormal startup or running. For convenient firmware upgrade and debugging in the future, please reverse this pin. The reference circuit design is shown as below.
Smart Wi-Fi Module Series SC20-WL Hardware Design 4 Wi-Fi and BT SC20-WL module provides a shared antenna interface ANT_WIFI/BT for Wi-Fi and Bluetooth (BT) functions. The interface impedance is 50Ω. External antennas such as PCB antenna and ceramic antenna can be connected to the module via the interface, so as to achieve Wi-Fi and BT functions. 4.1. Wi-Fi Overview SC20-WL series module supports 2.4GHz/5GHz double-bands WLAN wireless communication based on IEEE 802.11a/b/g/n standard protocols.
Smart Wi-Fi Module Series SC20-WL Hardware Design 802.11n HT20 MCS7 13dBm±2.5dBm 802.11n HT40 MCS0 14dBm±2.5dBm 802.11n HT40 MCS7 13dBm±2.5dBm 802.11a 6Mbps 15dBm±2.5dBm 802.11a 54Mbps 13dBm±2.5dBm 802.11n HT20 MCS0 14dBm±2.5dBm 802.11n HT20 MCS7 12dBm±2.5dBm 802.11n HT40 MCS0 14dBm±2.5dBm 802.11n HT40 MCS7 12dBm±2.5dBm 5GHz Table 24: Wi-Fi Receiving Performance Standard Data Rate Sensitivity 802.11b 1Mbps -96dBm 802.11b 11Mbps -87dBm 802.11g 6Mbps -91dBm 802.
Smart Wi-Fi Module Series SC20-WL Hardware Design 802.11n HT40 MCS7 -66dBm Referenced specifications are listed below: IEEE 802.11n WLAN MAC and PHY, October 2009 + IEEE 802.11-2007 WLAN MAC and PHY, June 2007 IEEE Std 802.11b, IEEE Std 802.11d, IEEE Std 802.11e, IEEE Std 802.11g, IEEE Std 802.11i: IEEE 802.11-2007 WLAN MAC and PHY, June 2007 4.2. BT Overview SC20-WL module supports BT4.2 (BR/EDR+BLE) specification, as well as GFSK, 8-DPSK, π/4-DQPSK modulation modes.
Smart Wi-Fi Module Series SC20-WL Hardware Design 4.2.1. BT Performance The following table lists the BT transmitting and receiving performance of SC20-WL module. Table 26: BT Transmitting and Receiving Performance Transmitter Performance Packet Types DH5 2-DH5 3-DH5 Transmitting Power 10dBm±2.5dBm 8dBm±2.5dBm 8dBm±2.
Smart Wi-Fi Module Series SC20-WL Hardware Design 5 Antenna Interface SC20-WL antenna interface includes a Wi-Fi/BT antenna. The antenna interface has an impedance of 50Ω. 5.1. Wi-Fi/BT Antenna Interface The following tables show the Wi-Fi/BT antenna pin’s definition and frequency specification. Table 27: Pin Definition of Wi-Fi/BT Antenna Pin Name Pin No. I/O Description Comment ANT_WIFI/BT 77 IO Wi-Fi/BT antenna 50Ω impedance Table 28: Wi-Fi/BT Frequency Type Frequency Unit 802.
Smart Wi-Fi Module Series SC20-WL Hardware Design NOTE Place the π-type matching components (R1, C1, C2) as close to the antenna as possible. 5.1.1. Reference Design of RF Layout For user’s PCB, the characteristic impedance of all RF traces should be controlled to 50Ω. The impedance of the RF traces is usually determined by the trace width (W), the materials’ dielectric constant, height from the reference ground to the signal layer (H), and the clearance between RF traces and grounds (S).
Smart Wi-Fi Module Series SC20-WL Hardware Design Figure 32: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) Figure 33: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) In order to ensure RF performance and reliability, the following principles should be complied with in RF layout design: Use an impedance simulation tool to accurately control the characteristic impedance of RF traces to 50Ω.
Smart Wi-Fi Module Series SC20-WL Hardware Design 5.2. Antenna Installation 5.2.1. Antenna Requirements The following table shows the requirements on Wi-Fi/BT antenna. Table 29: Antenna Requirements Type Requirements Wi-Fi/BT VSWR: ≤ 2 Gain (dBi): 1 Max Input Power (W): 50 Input Impedance (Ω): 50 Polarization Type: Vertical Cable Insertion Loss: < 1dB 5.2.2. Recommended RF Connector for Antenna Installation If RF connector is used for antenna connection, it is recommended to use the U.
Smart Wi-Fi Module Series SC20-WL Hardware Design U.FL-LP serial connector listed in the following figure can be used to match the U.FL-R-SMT. Figure 35: Mechanical Parameters of U.FL-LP Connectors The following figure describes the space factor of mated connectors. Figure 36: Space Factor of Mated Connectors (Unit: mm) For more details, please visit http://www.hirose.com.
Smart Wi-Fi Module Series SC20-WL Hardware Design 6 Electrical, Reliability and Radio Characteristics 6.1. Absolute Maximum Ratings Absolute maximum ratings for power supply and voltage on digital and analog pins of the module are listed in the following table. Table 30: Absolute Maximum Ratings Parameter Min. Max. Unit VBAT -0.5 6 V USB_VBUS -0.5 16 V Voltage on Digital Pins -0.3 2.3 V 6.2.
Smart Wi-Fi Module Series SC20-WL Hardware Design 6.3. Charging Performance Specifications Table 32: Charging Performance Specifications Parameter Min. Typ. Max. Unit Trickle charging-A current 81 90 99 mA Trickle charging-A threshold voltage range (15.62mV stepping up) 2.5 2.796 2.984 V Trickle charging-B threshold voltage range (18.75mV stepping up) 3.0 3.2 3.581 V Charge voltage range (25mV stepping up) 4 4.2 4.
Smart Wi-Fi Module Series SC20-WL Hardware Design 6.5. Current Consumption Table 34: SC20-WL Current Consumption Parameter Description Conditions Min. Typ. Max. Unit OFF state Power down 20 uA Sleep state RF sleep 1.4 mA Idle state RF idle 42.7 mA @1Mbps 298 mA @11Mbps 281 mA @6Mbps 286 mA @54Mbps 188 mA @6.5Mbps 20Mhz 275 mA @65Mbps 20Mhz 201 mA @13.
Smart Wi-Fi Module Series SC20-WL Hardware Design 6.6. Electrostatic Discharge The module is not protected against electrostatic discharge (ESD) in general. Consequently, it should be subject to ESD handling precautions that are typically applied to ESD sensitive components. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any application that incorporates the module.
Smart Wi-Fi Module Series SC20-WL Hardware Design 7 Mechanical Dimensions This chapter describes the mechanical dimensions of the module. All dimensions are measured in millimeter (mm), and the tolerances for dimensions without tolerance values are ±0.05mm. 7.1.
Smart Wi-Fi Module Series SC20-WL Hardware Design Figure 38: Module Bottom Dimensions (Top View) SC20-WL_Hardware_Design 75 / 81
Smart Wi-Fi Module Series SC20-WL Hardware Design 7.2. Recommended Footprint Figure 39: Recommended Footprint (Top View) NOTES 1. 2. For easy maintenance of the module, keep about 3mm between the module and other components on host PCB. All RESERVED pins should be kept open and MUST NOT be connected to ground.
Smart Wi-Fi Module Series SC20-WL Hardware Design 7.3. Top and Bottom Views of the Module Figure 40: Top View of the Module Figure 41: Bottom View of the Module NOTE These are renderings of SC20-W module. For authentic dimension and appearance, please refer to the module that you received from Quectel.
Smart Wi-Fi Module Series SC20-WL Hardware Design 8 Storage, Manufacturing and Packaging 8.1. Storage SC20-WL is stored in a vacuum-sealed bag. It is rated at MSL 3, and its storage restrictions are shown as below. 1. Shelf life in the vacuum-sealed bag: 12 months at <40ºC/90%RH. 2. After the vacuum-sealed bag is opened, devices that will be subjected to reflow soldering or other high temperature processes must be: Mounted within 168 hours at the factory environment of ≤30ºC/60%RH. Stored at <10%RH.
Smart Wi-Fi Module Series SC20-WL Hardware Design 8.2. Manufacturing and Soldering Push the squeegee blade to apply the solder paste on the surface of stencil, making the paste fill the stencil apertures and then letting it penetrate to the PCB. Downward squeegee pressure should be adjusted properly to ensure that the stencil is wiped clean without damaging the stencil. To ensure the module soldering quality, the recommended stencil thickness is 0.18mm~0.20 mm.
Smart Wi-Fi Module Series SC20-WL Hardware Design Max slope 2 to 3°C/sec Reflow time (D: over 220°C) 40 to 60 sec Max temperature 240°C ~ 245°C Cooling down slope 1 to 4°C/sec Reflow Cycle Max reflow cycle 1 8.3. Packaging SC20-WL is packaged in tape and reel carriers. Each reel is 12.32m long and contains 200 modules. The following figures show the package details, measured in mm.
Smart Wi-Fi Module Series SC20-WL Hardware Design Figure 44: Reel Dimensions Table 37: Reel Packaging Model Name SC20-WL MOQ for MP Minimum Package: 200pcs Minimum Package×4=800pcs 200 Size: 370mm × 350mm × 85mm N.W: 1.92kg G.W: 3.17kg Size: 380mm × 365mm × 365mm N.W: 7.68kg G.W: 13.
Smart Wi-Fi Module Series SC20-WL Hardware Design 9 Appendix A References Table 38: Related Documents SN Document Name Remark [1] Quectel_Smart_EVB_User_Guide Smart EVB User Guide [2] Quectel_Module_Secondary_SMT_User_Guide Module Secondary SMT User Guide [3] Quectel_RF_Layout_Application_Note RF Layout Application Note Table 39: Terms and Abbreviations Abbreviation Description ADC Analog-to-Digital Converter AMR Adaptive Multi-rate bps Bits Per Second BT Bluetooth CS Coding Scheme
Smart Wi-Fi Module Series SC20-WL Hardware Design I/O Input/Output LCD Liquid Crystal Display LCM Liquid Crystal Module LPDDR Low Power Double Data Rate MIPI Mobile Industry Processor Interface MSL Moisture Sensitivity Level NTC Negative Temperature Coefficient OTG On-The-Go PC Personal Computer PCB Printed Circuit Board PDA Personal Data Assistant POS Point Of Sales RF Radio Frequency RH Relative Humidity RHCP Right Hand Circularly Polarized RTC Real Time Clock Rx Receive
Smart Wi-Fi Module Series SC20-WL Hardware Design UART Universal Asynchronous Receiver & Transmitter Vmax Maximum Voltage Value Vnorm Normal Voltage Value Vmin 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 VImin Absolute Minimum Input Voltage Value VOHmax Maximum Output High Level Voltage
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