Wireless Lan Chip Triple Interface Design And Implementation

The progress and development of Wireless Local Access Net (WLAN) and interface technology urge that Wireless Local Access Net chip should develop in a high-speed and high-integrated way. This article focuses on the research of interface circle integration, which is one of portions in the Wireless Local Access Net card chip development. The article describes the interface solution in the chip which works on WLAN card, also this article describes how to design and to code and to test three kinds of interface which are PCMCIA, PCI and USB.There are several good ideas flashing in the device manner and methods of this project. First, Wireless Local Access Net card chip was designed in a double-bus way, all the data flow between the Wireless Local Access Net card and the interface through the Advanced Microcontroller Bus Architecture Advanced High-performance Bus (AMBA AHB), which is a high-speed bus in Advanced Microcontroller Bus Architecture (AMBA). Second, we apply the thinking of module to this project, interface and AHB bus are separated from the whole system as a little module, this kind of device manner decreases as soon as possible the disturbance come from other modules, which interact with the interface module. Therefore, either the debug of interface module or the united debug between the interface module and the whole system is easy and flexible. Thereby, we make the way of debug simple and shorten the period of debug. Third, as this project involves the realization and debug of three kinds of interface, we choose the Spartan2E series Programmable Logic Device, which was developed by Xilinx Company, as the central development and debug equipment, when we need to debug different interface code, the only thing we should do is to change different physical layer code and different interface. All those good ideas reflect that what a smart and easy-to-execute device manner.This article describes in particular the whole central device manner of the Wireless Local Access Net card, and the whole device manner of the interface module, and how to develop and to debug PCMCIA, PCI and USB interface modules based on protocol according to the device and solution manner of interface module. This article also introduces the environment of development, and how to program the hardware code, and setting up debug environment, and testing. This is an exploration ondevelopment and realization of interface module under the high -integrated tendency of interface circuit, and we finished the transmission of data successfully through the interface. At last we tape-out successfully. Based on our working experience, we can do better for the next project. At the end of this article, the author summarizes this project and gives outlook on the development of interface technology.