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发表于 2012-7-18 11:21:36
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EDN搜到了一篇 大家看看 日期较近的
Difference Between Altera & Xilinx
By Darla Ferrara, eHow Contributor, last updated February 08, 2012
Altera and Xilinx are both companies competing for a spot in the digital logic microchips marketplace. Specifically, each has a reputation for the field-programmable gate array, or FPGA, circuit. Each business has built a name for themselves in this arena. To understand the differences between the two products, you must know more about FPGAs.
FPGA Circuits
A field-programmable gate array, FPGA, circuit is the microchip version of a blank canvas. Customers can purchase these chips and decide how to use them later when integrating them onto a board. The designer programs the chip for a specific logical function. You can think of a logical function as a switch that turns things on and off on an electronic device. The advantage of the FPGA over other chips is the programmable option. Designers do not always know what they need until they are building the unit. Having FPGA elements gives them more options as they create.
Xilinx
Xilinx is the grandfather of FPGA circuitry. This is the company that started it all by developing the first chip of this kind. It offers multiple types of FPGAs, each with its own specifications. As of February 2012, Xilinx has six different families of FPGAs available. The tools available from Xilinx include the ML401 development kit, a board that allows you to design and implement the features of the FPGA. The board works as a testing ground as you program the chip. Xilinx is known for FPGAs, but the company does offer other types of digital logic microchips.
Altera
Altera created the first programmable logic device, or PDL, in 1984. Modern-day Altera produces a number of programmable chips, including the FPGA varieties. As of February 2012, the company has three separate families of FPGA available, each with distinctive specification. The design properties include a friendly graphical user interface (GUI) that makes programming simpler for novice designers. Altera is known for a wide range of programmable chips. Its product line is more expansive than that of Xilinx.
Differences
It is impossible to list specific differences among the products offered by these two companies. Because of the variety of chips each offers, there are too many variables. Seasoned designers may prefer Xilinx chips over Altera's because they are more controllable. Those creating their first boards may want the friendly programming tools available from Altera. Ultimately, you should review all the products from both companies and select the right chip based on your needs and budget.
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发表于 2012-7-18 09:47:07
用的是啥啊？
