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==IntroductionSpecification==
The module is built around an LS Research TiWi-BLE Integrated Transceiver Modules for WLAN 802.11 b/g/n and Bluetooth. The module implements the necessary PHY/MAC layers to support WLAN applications in conjunction with a host processor over a SDIO interface. The module also provides a Bluetooth platform through the HCI transport layer. Both WLAN and Bluetooth share the same antenna port.
==Specification= Interface timings ===
==Pinout and detailed pin functions==
DWM can be connected to the host board through the J1 connector. ===ResetPinout reference=== The following picture shows the reference pins of the J1 connector (placed on the bottom side of the DWM module): [[File:Dwm_05.png|300px|frameless|border]] ===J1 connector pinout table=== The following table reports the connector pinout: {| class="wikitable" | {{table}}| style="background:#f0f0f0;" align="center" |'''Pin number'''| style="background:#f0f0f0;" align="center" |'''Name'''| style="background:#f0f0f0;" align="center" |'''Type'''| style="background:#f0f0f0;" align="center" |'''Description'''| style="background:#f0f0f0;" align="center" |'''Voltage'''| style="background:#f0f0f0;" align="center" |'''Note'''|-| 1||BT_EN||Input||Bluetooth Enable||3.3V|||-| 2||WIFI_EN||Input||WLAN Enable||3.3V|||-| 3||BT_CTS||Input||Bluetooth HCI UART CTS||3.3V|||-| 4||WIFI_IRQ||Output||WLAN Interrupt Request||3.3V|||-| 5||BT_RX||Input||Bluetooth HCI UART RX||3.3V|||-| 6||BT_F2||Input||Bluetooth Wakeup ||3.3V|| Please leave unconnected if not used|-| 7||BT_RTS||Output||Bluetooth HCI UART RTS||3.3V|||-| 8||WIFI_CLK_REQ(A)||Output||HOST_WakeUp||3.3V|| Please leave unconnected if not used|-| 9||BT_TX||Output||Bluetooth HCI UART TX||3.3V|||-| 10||NC||||Reserved for future use||-||Please leave unconnected.|-| 11||DGND||||Ground||-|||-| 12||NC||||Reserved for future use||-||Please leave unconnected.|-| 13||DAT3||Input/Output||SDIO Data Bit 3||3.3V|||-| 14||NC||||Reserved for future use||-||Please leave unconnected.|-| 15||DAT2||Input/Output||SDIO Data Bit 2||3.3V|||-| 16||NC||||Reserved for future use||-||Please leave unconnected.|-| 17||DAT1||Input/Output||SDIO Data Bit 1||3.3V|||-| 18||NC||||Reserved for future use||-||Please leave unconnected.|-| 19||DAT0||Input/Output||SDIO Data Bit 0||3.3V|||-| 20||NC||||Reserved for future use||-||Please leave unconnected.|-| 21||DGND||||Ground||-|||-| 22||DGND||||Ground||-|||-| 23||SDO_CMD||Input/Output||SDIO Command Line||3.3V|||-| 24||SDO_CLK||Input||SDIO Clock||3.3V|||-| 25||DGND||||Ground||-|||-| 26||DGND||||Ground||-|||-| 27||3.3V||Power Input||+3.3V Input Voltage||3.3V|||-| 28||3.3V||Power Input||+3.3V Input Voltage||3.3V|||-| 29||5V||Power Input|||+5V Input Voltage||5V|||-| 30||5V||Power Input||+5V Input Voltage||5V|||-| |} ==== Connector part number ==== * on module: Molex 501920-3001 * on Carrier board: for example Molex 52991-0308 (dependon on stand-off chosen) ==Antenna connector== The following picture shows the position of the WiFi/Bluetooth antenna connector: [[File:Dwm_06.png|300px|frameless|border]]
==Integration guide==
This section provides useful information and resources that allow let the system designer to integrate the DWM module in his/her the application very quickly. === Typical scenario=== The following picture shows the conceptual block diagram of the application where the host is an Embedded PC. [[File:Dwm-epc-scenario.png|thumb|center|400px|Typical scenariosscenario]] ====Electrical guidelines====*Keep SDIO lines as short as possible.*5V and 3.3V rails can power up in any order*Keep WIFI_EN asserted during power-up sequence
===Mechanical information===
The following image shows the module dimensions: [[File:Dwm-layout-top.png|thumbnail|center|300px|DWM dimensions]] * DXF: https://www.dave.eu/system/files/area-riservata/dwm.dxf_.zip ===PCB footprintLayout=== The following images show the module layout: [[File:Dwm_01.png|thumbnail|center|200px|DWM Top View]] [[File:Dwm_04.png|thumbnail|center|200px|DWM Bottom View]] The component view (top and bottom) is available as PDF file: * PDF: https://www.dave.eu/system/files/area-riservata/CS061412B_all_view.pdf
===3D===
* IDF (3D): https://www.dave.eu/system/files/area-riservata/dwm-3D.zip==Qualification tests=Calibration process===The radio interface of the DWM module is configured by several parameters. These parameters are set through a calibration process, that is described in detail [http://processors.wiki.ti.com/index.php/WL12xx_NLCP_Calibration_Process here]. The calibration process—that produces an NVS file—is not trivial. Apart from the chip itself (Texas Instruments WL1271L in this case), it depends on:*the antenna - a list of [https://www.lairdconnect.com/wireless-modules/wifi-modules-bluetooth/tiwi-ble#certified-antennas certified antennas] and cables can be found in the TiWi Module device datasheet. Use of these antennas does not require additional FCC/IC/ETSI certifications.*the firmware version downloaded to the chip: please refer to the proper firmware available on your Linux distribution for matching the kernel driver and run properly the calibration process*the initialization data, typically stored in an INI file: please refer to the [https://www.lairdconnect.com/wireless-modules/wifi-modules-bluetooth/tiwi-ble#documentation Laird Connectivity TiWi documentation] for checking the proper INI file configuration*the Calibrator source code [https://github.com/TI-OpenLink/ti-utils/tree/ol_R5.SP8.01 here]More information about kernel driver and calibration on the [https://www.lairdconnect.com/forum/tiwi-ble/online-documentation/support-and-tools Laird Support and Tools] web page. ==== MAC address ====The MAC address is set at calibration time for WLAN. To use the built in MAC address for WLAN be sure to pass a MAC address of <code>00:00:00:00:00:00</code> as a parameter to the auto-calibrate function. To set a custom MAC address for WLAN just pass the desired value into the auto-calibrate function. ==== NVS ready-to-use calibration files ====The following links refer to specific use cases, where the resulting NVS file is provided along with DAVE Embedded Systems products integrating DWM module.*[[XUELK-AN-001:_Using_WiFi-Bluetooth_combo_plugin_with_SBC_Lynx|SBC Lynx (XUELK)]]*[[XUELK-AN-002:_Running_Debian_distribution#Bluetooth_and_WiFi|SBC Lynx (Debian)]]The <code>nvs.bin</code> file has been created using the certified antenna [http://www.molex.com/molex/products/datasheet.jsp?part=active/0479500011_ANTENNAS.xml Molex 47950-0011] Please refer to the below Laird Connectivity TiWi-BLE documentation for more information. == References ==* [https://www.lairdconnect.com/wireless-modules/wifi-modules-bluetooth/tiwi-ble#documentation Laird Connectivity TiWi-BLE documentation]* [https://www.lairdconnect.com/documentation/tiwi-ble-datasheet TiWi-BLE datasheet]* [https://www.lairdconnect.com/documentation/tiwi-antenna-design-guide Antenna Design Guide]* [https://www.lairdconnect.com/documentation/tiwi-emc-compliance-guide EMC Compliance Guide]* [https://www.lairdconnect.com/documentation/wlan-ini-etsi-all-certified-antennas WLAN INI all certified antennas]* [http://linuxwireless.sipsolutions.net/en/users/Drivers/wl12xx/ WL127x Linux Calibrator]Since January 15, 2021, TI's processors wiki site has been shut down. The following original documentation is available only as cached pages.* [http://processors.wiki.ti.com/index.php/WL127x WL127x Main page]* [http://processors.wiki.ti.com/index.php/WL127x_WLAN_API_Information WL127x WLAN API]* [http://processors.wiki.ti.com/index.php/WL12xx_NLCP_Calibration_Proccess Calibration Process]