Wireless Module (DWM)
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Contents
Introduction[edit | edit source]
Wireless Module (DWM) is one of DAVE's Add-On Modules. These devices are conceived and designed to be easily included in embedded system, in order to ease the use from the system integrator's standpoint, in terms of hardware issues and software compatibility. These characteristics make them suitable for use in combination with a wide range of host devices, from low-cost microcontrollers to high-end embedded processors.
DWM belongs to the Connectivity Modules subfamily and provides support for WiFi (802.11 b/g/n) and Bluetooth (2.1 + EDR) throgh, respectively, a SDIO interface and a UART interface.
Specification[edit | edit source]
The module is built around a LS Research TiWi-R2 Integrated Transceiver Modules for WLAN 802.11 b/g/n and Bluetooth. The module realizes 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.
Features[edit | edit source]
- IEEE 802.11 b,g,n,d,e,i, compliant
- Bluetooth 2.1+EDR, Power Class 1.5
- Reduced footprint: 25 mm x 38 mm
- Low height profile
- U.FL connector for external antenna
- Integrated band-pass filter
Interface timings[edit | edit source]
Please refer to the TiWi-R2 Datasheet for SDIO [WiFi] and UART [Bluetooth] interface timings.
Power consumption[edit | edit source]
Reset[edit | edit source]
Operating modes[edit | edit source]
Pinout and detailed pin functions[edit | edit source]
DWM can be connected to the host board through the J1 connector. The following table reports the connector pinout:
| Pin number | Name | Type | Description | Voltage | Note |
| 1 | BT_EN | Input | Bluetooth Enable | 3.3V | |
| 2 | WIFI_EN | Input | WLAN Enable | 3.3V | |
| 3 | UART2_RTSn | Output | Bluetooth HCI UART RTS | 3.3V | |
| 4 | WIFI_IRQ | Output | WLAN Interrupt Request | 3.3V | |
| 5 | UART2_TXD | Input/Output | Bluetooth HCI UART TX | 3.3V | |
| 6 | BT_F2 | Output | Bluetooth Wakeup / DC2DC Mode | 3.3V | |
| 7 | UART2_CTSn | Input | Bluetooth HCI UART CTS | 3.3V | |
| 8 | WIFI_CLK_REQ(A) | Output | HOST_WakeUp | 3.3V | |
| 9 | UART2_RXD | Input | Bluetooth HCI UART RX | 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 | |
Pinout reference[edit | edit source]
The following picture shows the reference pins of the J1 connector:
Reset[edit | edit source]
Integration guide[edit | edit source]
This section provides useful information and resources that allow the system designer to integrate DWM module in his/her application very quickly.
Typical scenarios[edit | edit source]
Mechanical information[edit | edit source]
The following image shows the module dimensions:
Layout[edit | edit source]
The following images show the module layout:
The component view (top and bottom) is avalable as PDF file:
