DWS ADD-ON/DWS Hardware/Integration guide
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| History | |||
|---|---|---|---|
| Version | Issue Date | Notes | |
| 1.0.0 | Jan 2022 | First version | |
Contents
Integration guide[edit | edit source]
This section provides useful information and resources that let the system designer integrate the DWS module in the application very quickly.
Typical scenario[edit | edit source]
The following picture shows the conceptual block diagram of the application where the host is an Embedded System.
Electrical guidelines[edit | edit source]
- SDIO lines
- 50ohm single ended impedance
- keep lines as short as possible
- place series resistor on the carrier for impedance matching (tipical 22ohm)
- 5V and 3.3V rails can power up in any order
- by default 5V rail is not used by the add-on
- keep WIFI_EN asserted during power-up sequence
Customizations[edit | edit source]
Many customization are potentially available for this module:
- I/O with 1.8V levels
- applies to all the interfaces (SDIO, UART, EN)
- the module can be powered by the 5V rail only
- I2S interface can be made available for BT operations
Ask more information to technical support about this topic.
Calibration process[edit | edit source]
The radio interface of the DWS module is configured by several parameters. These parameters are set in Linux user space.
Regulatory domain[edit | edit source]
For proper operation in the country where the system is deployed, the regulatory domain has to be configured. See this section for more details
MAC address[edit | edit source]
The MAC address is fused inside the module and assured to be unique
Antenna selection[edit | edit source]
The WiFi module featured inside this add-on provides some precertifications that allow the final customer to decrease the amount of test to perform to obtain the needed certification.
To be able to use these precertifications a proper antenna has to be selected. Contact technical support for more informations.
Tested Antennas[edit | edit source]
Following a list of tested and approved antennas:
- Laird technology 001-0001 with UFL to SMA adapter
- J2 Antennas 2JF0102P patch antenna
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