ShangHai Ehong Technology Co.,Ltd. QCA4020 Module (WL501) Product Specification WL501 October 31, 2018 Ehong is a trademark of Ehong Solutions, registered in the United States and other countries. Other product and brand names may be trademarks or registered trademarks of their respective owners. This technical data may be subject to U.S. and international export, re-export, or transfer ( export and international law is strictly prohibited.
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Ehong Confidential 2 Revision history Revision Date A October 2018 Description Initial release Ehong Confidential 3 Contents 1 Introduction............................................................................................................................. ............... 5 2 Hardware specification......................................................................................................................... 7 2.1 WL501 module pinout................................................................................................................................................ 7 2.2 WL501 interface summary...................................................................................................................................... 12 2.3 Bootstrap signals...................................................................................................................................................... 13 2.4 Electrical characteristics.......................................................................................................................................... 13 2.4.1 General DC electrical characteristics................................................................................................. 13 2.4.2 WL501 2.4 GHz power measurements.............................................................................................. 14 2.4.3 WL501 5 GHz power measurements................................................................................................. 14 2.4.4 BLE power measurements.................................................................................................................. 15 2.4.5 802.15.4 power measurements.................................................................................................................. 15 3 Mechanical interface specification.................................................................................................. 16 3.1 WL501 module dimensions..................................................................................................................................... 16 Figure 1-1 WL501 block diagram............................................................................................................................. ...................... 5 Figure 2-1 WL501 front view.................................................................................................................................................. ......... 7 Figure 2-2 WL501 back view............................................................................................................................. ............................. 8 Figure 2-3 WL501 pinout definition.............................................................................................................................. .................. 9 Figure 3-1 WL501 module dimensions........................................................................................................................................ 16 Figure 3-2 WL501 module pinout dimensions (in mm)............................................................................................................. 17 Figure 3-3 WL501 module pinout dimensions-Detail B (in mm).............................................................................................. 18 Figures Tables Table 2-1 WL501 module non-GPIO pinout definition................................................................................................................. 9 Table 2-2 WL501 module pinout definition and QCA4024 GPIO assignment........................................................................ 10 Table 2-3 Bootstrap mode............................................................................................................................. ............................... 13 Table 2-4 JTAG mode.............................................................................................................................................. ..................... 13 Table 2-5 XTAL mode............................................................................................................................. ...................................... 13 Table 2-6 32.768KHz Sleep Clock Mode............................................................................................................................. ...... 13 Table 2-7 DC electrical characteristics for digital I/Os............................................................................................................... 14 Table 2-8 2.4 GHz power measurements at antenna port at 25 C, 3.3V nominal............................................................. 14 Table 2-9 5 GHz power measurements at antenna port at 25 C, 3.3V nominal................................................................ 14 Table 2-10 BLE power measurements at antenna port at 25 C, 3.3V nominal with external PA.................................... 15 Table 2-11 802.15.4 power measurements at antenna port at 25 C, 3.3V nominal with external PA....................................15 Ehong Confidential 4 1 Introduction The WL501 module provides a highly-integrated and flexible platform for developing and evaluating products and applications based on the QCA4020 SoC. The WL501 module can be either used with CDB20 development kit for software development or incorporated into OEM products to enable rapid deployment of Wi-Fi connected systems. The WL501 module includes the following components:
QCA4020 chip (WLAN/BLE/15.4) A printed antenna 32 Mb NOR flash memory The QCA4020 is a dual band 1x1 802.11 a/b/g/n device optimized for low-power embedded applications with single-stream capability for both Tx and Rx. It has an integrated network processor with a large set of TCP/IP with IPv4/IPv6-based services. Ehong Confidential 5 QCA4020 Module (WL501) Product Specification Hardware specification WL501 module features Dual-Band IEEE 802.11 a/b/g/n, single stream 1x1 BLE 5.0 ZigBee 802.15.4 Green Tx power saving mode Low -power listen mode Four-layer PCB design Rich set of GPIO(s) and interfaces: I2C, HSUART, UART, SPI, QSPI, SDIO 2.0, I2S, JTAG, Sensor ADC (up to 8 channels, 12bit, 1Msps). Up to 8 PWM optimized for LED lighting applications. Secure boot and support for application-level AES encryption and image authentication hash function (SHA256) Advancement power management scheme to minimize power dissipation for each use case WL501 manufacturing interface USB 2.0 interface with integrated controller and PHY for manufacturing test and configuration WL501 host interfaces UART host interface to a remote microcontroller with an AT style command set Ehong Confidential 6 QCA4020 Module (WL501) Product Specification 2 Hardware specification Hardware specification 2.1 WL501 module pinout Figure 2-1 WL501 front view Ehong Confidential 7 QCA4020 Module (WL501) Product Specification Hardware specification Figure 2-3 WL501 pinout definition Ehong Confidential 8 QCA4020 Module (WL501) Product Specification Hardware specification Table 2-1 WL501 module non-GPIO pinout definition Pin #
Pin Name Description Power 2-4 22 23 Input Signals VBATT_BE 3.3V Input Power USB20_DM_BE USB20_DP_BE USB Differential Negative USB Differential Positive Ehong Confidential 9 QCA4020 Module (WL501) Product Specification Hardware specification Pin #
Pin Name Description SENSEADC_0_BE SENSEADC_1_BE CHIP_PWD_L_BE 12bit ADC, ADC 0 input 12bit ADC, ADC 1 input BLE/802.15.4 Reset Pin Ground 1, 5, 33, 38, 42, 45, 67-69, 71, 76, 85, 98-
101, 104, 109, 111, 115, 119, 124, 127, 130 GND Ground VDDIO18_BE VDD11_SWREG_OUT VDDIO18_WL PWRDWN_OUT_N Not used, NC Not used, NC Not used, NC Not used, NC BYPASS_INT_PMU_MSK Not used, NC IOT_MODE_EN_WL Not used, NC Not used, NC WAKEUP_N USB Differential Positive, WLAN interface, Not used, NC USB Differential Negative, WLAN interface, Not used, NC USB_DNEG USB_DPOS 27 24 37 17 126 7 13 14 No Connect 43,44 39-41 128, 129 117 Table 2-2 WL501 module pinout definition and QCA4024 GPIO assignment Pin
Pin Name Primary Functio n SPI or I2C or QSPI SD Card PWMADC SenseADC SDIO Memory UART JTAG or PTA Codec 84 83 81 79 61 58 59 56 32 GPIO_5 GPIO4 WL_WK _BE UP_BE GPIO5 _BE GPIO6 _BE GPIO7 _BE GPIO_7 GPIO_6 GPIO8 _BE GPIO9 _BE GPIO1 0_BE GPIO1 1_BE GPIO1 2_BE GPIO_8 GPIO_9 GPIO_10 GPIO_11 GPIO_12 I2C0_M aster_S CL I2C0_M aster_S DA BT_ACTIVE WLAN_ACT IVE BT_PRIORI TY M0&M4_U ART0_RX M0&M4_U ART0_TX JTAG1_ BE_TC K JTAG1_ BE_TD O JTAG1_ BE_TM S JTAG1_ BE_TDI pwm_out_0 Ehong Confidential 10 QCA4020 Module (WL501) Product Specification Hardware specification Pin
Pin Name Primary Functio n SPI or I2C or QSPI SD Card SDIO Memory UART JTAG or PTA Codec BT_ACTIVE WLAN_ACT IVE PWMADC SenseADC pwm_out_7 pwm_out_6 pwm_out_1 pwm_out_2 pwm_out_4 pwm_out_3 pwm_out_5 I2C1_M aster_S CL I2C1_M aster_S DA SPI_Sla SDIO_S lave_CL ve_CLK K SPI_Sla SDIO_S HS_UART0 _DM_CTS HS_UART0 _DM_TXD HS_UART0 _DM_RFR HS_UART0 _DM_RXD SD_Master HS_UART1 _CLK (O) _DM_CTS SD_Master HS_UART1 _CMD (B) _DM_TXD HS_UART1 _DM_RXD _DATA_0
(B) lave_C MD SDIO_S SD_Master lave_D ATA_0 SDIO_S SD_Master lave_D ATA_1 SDIO_S SD_Master lave_D ATA_2 SDIO_S SD_Master lave_D ATA_3 _DATA_2
(B) _DATA_1
(B) _DATA_3
(B) HS_UART1 _DM_RFR M0&M4_U ART2_RX M0&M4_U ART2_TX 54 52 55 53 51 16 11 15 19 26 21 29 31 28 30 46 47 48 50 GPIO1 3_BE GPIO1 4_BE GPIO1 5_BE GPIO_13 GPIO_14 GPIO_15 GPIO1 SPI0_CS 6_BE 2_N GPIO1 SPI0_CS 7_BE 1_N GPIO_18 GPIO1 8_BE GPIO1 9_BE GPIO2 0_BE GPIO2 1_BE GPIO2 2_BE GPIO2 3_BE GPIO2 4_BE GPIO2 5_BE GPIO2 6_BE GPIO2 7_BE GPIO2 8_BE GPIO2 9_BE GPIO3 0_BE GPIO3 1_BE GPIO_19 ve_CS_ N SPI_SL GPIO_20 AVE_MI SO GPIO_21 GPIO_22 SPI_SL GPIO_23 AVE_M OSI SPI0_M GPIO_24 aster_C S_N SPI0_M GPIO_25 aster_C LK SPI0_M GPIO_26 aster_M OSI SPI0_M GPIO_27 aster_M ISO GPIO_28 GPIO_29 GPIO_30 GPIO_31 Ehong Confidential JTAG2_ BE_TC K JTAG2_ BE_TD O JTAG2_ BE_TM S JTAG2_ BE_TDI I2S_BC LK I2S_RX D I2S_TX D I2S_FS YNC 11 QCA4020 Module (WL501) Product Specification Hardware specification Pin
Pin Name Primary Functio n SPI or I2C or QSPI SD Card PWMADC SenseADC SDIO Memory UART JTAG or PTA Codec I2S_MC LK 49 10 80 57 64 78 63 62 60 25 20 18 12 9 8 82 GPIO_32 GPIO3 2_BE GPIO3 CHIP_P WD_L_ 3_BE WL ATUS GPIO4 PWR_ST 1_BE GPIO4 Ext_32K 8_BE GPIO4 9_BE GPIO_49 _IN GPIO5 0_BE GPIO5 1_BE GPIO5 2_BE GPIO5 3_BE GPIO5 4_BE GPIO5 5_BE GPIO5 6_BE GPIO5 7_BE GPIO5 8_BE GPIO5 9_BE GPIO6 0_BE GPIO_50 GPIO_51 GPIO_52 GPIO_53 GPIO_54 GPIO_55 GPIO_56 GPIO_57 GPIO_58 GPIO_59 GPIO_60 JTAG3_ BE_TC K JTAG3_ BE_TD O JTAG3_ BE_TM S JTAG3_ BE_TDI SENSEADC 2 SENSEADC 3 SENSEADC 4 SENSEADC 5 SENSEADC 6 SENSEADC 7 HS_UART2 _DM_CTS
(I) HS_UART2 _DM_TXD
(O) BT_PRIORI TY 2.2 WL501 interface summary 2x I2C Master Interface 1x High speed UART Up to 3Mbps data rate 1x UART Up to 115200 kbps data rate Ehong Confidential 12 QCA4020 Module (WL501) Product Specification Hardware specification 1x I2S 1x JTAG 1x ADC Sense 1x USB2.0 interface 1x SPI Interface 2.3 Bootstrap signals Table 2-3 Bootstrap mode GPIO9_BE GPIO22_BE Description 0 1 Force M4 to load image from flash memory (Default) Force M4 to boot in EDL (Emergency Download Mode). Table 2-4 JTAG mode GPIO9_BE GPIO25_BE GPIO18_BE Description 0 0 1 1 X 0 1 0 1 X No JTAG enabled JTAG Pins on GPIO[53:50]_BE JTAG Pins on GPIO[11:8]_BE JTAG Pins on GPIO[27:24]_BE Not Allowed Table 2-5 XTAL mode 40MHz Xtal Not Allowed GPIO23_BE Description Table 2-6 32.768KHz Sleep Clock Mode GPIO21_BE GPIO20_BE Description 0 0 0 0 0 0 1 0 1 0 0 1 1 0 1 0 1 Chip Internal LPO External Crystal 32.768KHz External 32.768KHz TCXO Clock connected to GPIO_48_BE Not Allowed 2.4 Electrical characteristics 2.4.1 General DC electrical characteristics These conditions apply to all DC characteristics unless otherwise specified: Tamb = 25 C, VBATT BE = 3.3 V Ehong Confidential 13 QCA4020 Module (WL501) Product Specification Hardware specification Table 2-7 DC electrical characteristics for digital I/Os Symbol Parameter Conditions Min Typ Max Unit VIH VIL VOH VOL High level I voltage Low level I voltage High level O voltage Low level O voltage 2.4
-0.3 3.0
-0.3 3.6 0.3 3.3 0.4 V V V V 2.4.2 WL501 2.4 GHz power measurements Table 2-8 2.4 GHz power measurements at antenna port at 25 C, 3.3V nominal Standard Rx Sensitivity Unit Typical Tx Compliant Power1 802.11b 802.11g 802.11n HT20 802.11n HT40 22.86 23.53 23.35 21.62
-87
-91.5
-92
-89.5 dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm 2.4.3 WL501 5 GHz power measurements Table 2-9 5 GHz power measurements at antenna port at 25 C, 3.3V nominal Standard Rx Sensitivity Unit Typical Tx Compliant Power2 802.11a 802.11n HT20 802.11n HT40 B1:21.16 B4:18.57 B1:21.98 B4:18.46 B1:21.44 B4:18.73
-89.5
-89.5
-86.5 dBm dBm dBm dBm dBm dBm 1 Numbers shown based on OLPC per board calibration 2 Numbers shown based on OLPC per board calibration Ehong Confidential 14 QCA4020 Module (WL501) Product Specification Hardware specification 2.4.4 BLE power measurements Table 2-10 BLE power measurements at antenna port at 25 C, 3.3V nominal with external PA Tx Power Rx Sensitivity Parameter Description Typical BT LE 1M BT LE 2M BT LE 1M BT LE 2M 2.10 1.11
-93
-93 2.4.5 802.15.4 power measurements Table 2-11 802.15.4 power measurements at antenna port at 25 C, 3.3V nominal with external PA Parameter Description Tx power Rx Sensitivity O-QPSK DSSS O-QPSK DSSS Typical 1.98
-101 Unit dBm dBm dBm dBm Unit dBm dBm Ehong Confidential 15 3 Mechanical interface specification 3.1 WL501 module dimensions Figure 3-1 WL501 module dimensions Ehong Confidential 16 QCA4020 Module (WL501) Product Specification Mechanical interface specification Figure 3-2 WL501 module pinout dimensions (in mm) Ehong Confidential 17 QCA4020 Module (WL501) Product Specification Mechanical interface specification Figure 3-3 WL501 module pinout dimensions-Detail B (in mm) Ehong Confidential 18 FCC Statement:
Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 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. 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. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular 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 or more of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. Revision History OEM Guidance 1. Applicable FCC rules This device complies with part 15.247/15.407 of the FCC Rules. 2. The specific operational use conditions This module can be used in IoT devices. The input voltage to the module is nominally 3.3 V DC. The operational ambient temperature of the module is 0 C ~ 85 C. the embedded PCB antenna is allowed. Any other external antenna is prohibited. 3. Limited module procedures 4. Trace antenna design N/A N/A 5. RF exposure considerations The equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body. If the equipment built into a host as a portable usage, the additional RF exposure evaluation may be required as specified by 2.1093. Espressif Systems 6. Antenna Antenna type: PCB antenna Peak gain : 1.0dBi 7. Label and compliance information An exterior label on OEMs end product can use wording such as the following:
Contains Transmitter Module FCC ID: 2ACCRWL501 or Contains FCC ID:
2ACCRWL501 Information on test modes and additional testing requirements 8. a)The modular transmitter has been fully tested by the module grantee on the required number of channels,modulation types, and modes, it should not be necessary for the host installer to re-test all the available transmitter modes or settings. It is recommended that the host product manufacturer, installing the modular transmitter,perform some investigative measurements to confirm that the resulting composite system does not exceed the spurious emissions limits or band edge limits (e.g., where a different antenna may be causing additional emissions). b)The testing should check for emissions that may occur due to the intermixing of emissions with the other transmitters, digital circuitry, or due to physical properties of the host product
(enclosure). This investigation is especially important when integrating multiple modular transmitters where the certification is based on testing each of them in a stand-alone configuration. It is important to note that host product manufacturers should not assume that because the modular transmitter is certified that they do not have any responsibility for final product compliance. c)If the investigation indicates a compliance concern the host product manufacturer is obligated to mitigate the issue. Host products using a modular transmitter are subject to all the applicable individual technical rules as well as to the general conditions of operation in Sections 15.5, 15.15, and 15.29 to not cause interference. The operator of the host product will be obligated to stop operating the device until the interference have been corrected . 9. Additional testing, Part 15 Sub part B disclaimer The final host / module combination need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device. The host integrator installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operation and should refer to guidance in KDB 996369. For host products with certified modular transmitter, the frequency range of investigation of the composite system is specified by rule in Sections 15.33(a)(1) through
(a)(3), or the range applicable to the digital device, as shown in Section 15.33(b)(1), whichever is the higher frequency range of investigation When testing the host product, all the transmitters must be operating.The transmitters can be enabled by using publicly-available drivers and turned on, so the transmitters are active. In certain conditions it might be appropriate to use a technology-specific call box (test set) where accessory 50 devices or drivers are not available. When testing for emissions from the unintentional radiator, the transmitter shall be placed in the receive mode or idle mode, if possible. If receive mode only is not possible then, the radio shall be passive (preferred) and/or active scanning. In these cases, this would need to enable activity on the communication BUS (i.e., PCIe, SDIO, USB) to ensure the unintentional radiator circuitry is enabled. Testing laboratories may need to add attenuation or filters depending on the signal strength of any active beacons (if applicable) from the enabled radio(s). See ANSI C63.4, ANSI C63.10 and ANSI C63.26 for further general testing details. The product under test is set into a link/association with a partnering device, as per the normal intended use of the product. To ease testing, the product under test is set to transmit at a high duty cycle, such as by sending a file or streaming some media content.