Wireless LAN or what we call WLAN is the most commonly used wireless technology. This technology is highly applicable for the industries due its excellent features. There are certain ways to minimize the interference like using the narrow band carrier signal or a higher data bit rate sequence.
There are two WLAN modules shown below that target the customer in need of integrating WLAN:
SPI WLAN Module
Serial Peripheral Interface (SPI) is the interface for this module. SPI is a full duplex synchronous serial interface for connecting low / medium bandwidth external devices using four wires. SPI devices communicate using a master/ slave relationship over two data lines and two control lines.
This SPI module requires a TCP/IP stack and integration of a module specific WLAN driver in the host. It is used when there is a need to integrate WLAN in a device using IP wired communication.
Block Diagram of SPI WLAN Module
The block diagram for the USB control applications comprises of Low Dropout Voltage Regulators, a USB Controller and USB Power Control Switch. The LDO Regulator 1 operates the USB Power Control Switch and the LDO Regulator 2 regulates the supply to USB Controller. The USB Power Control Switch has four output pins that support the four independent downstream Ports. The output voltage depends on the power supply voltage, tolerances, PCB connector and traces resistances and switch resistance.
Conclusion
SPI Module fulfills the following WLAN requirements in the wireless industry:
- Installation would be easier for the industrial user.
- Data which is not manipulated will be secured.
- Increases the strength of the application and makes it reliable.
- Capable of long distances.
The Voltage Regulators which can be used in the application are:
XC6202, XC6203, XC6204 series.
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