Programmable Logic for the Masses： Lattice MACHXO2 CPLDs

　　Programmable Logic for the Masses： Lattice MACHXO2 CPLDs

　　任何逻辑设计者都会告诉你，离散逻辑运行良好，但决不是真正的理想解决方案。除非你需要的是一个单一的门或逆变器，建立逻辑功能从离散的逻辑芯片可以采取许多设备，电路板空间和电源。这一点尤其如此，因为高级功能块是由原始逻辑元素从底层构建而成的。

　　超低成本评估和开发工具包是一个很好的方法来探索一项对你来说可能没有风险或时间的新技术。PLD技术就是一个很好的例子。

　　莱迪思半导体是PLD、CPLD、FPGA供应商谁提供一个低成本的开发工具包，支持machxo2，一家人。本文以在功能和家庭功能的machxo2看起来和新的machxo2微微开发工具包。这座“罩”下，让你知道如果你决定有机会在您的路径使用可编程逻辑的期望。

　　Programmable perspective

　　Programmable Logic Devices have been around for a long time and have earned their way into our boards and systems. Early simple， sum-of-products， fusible-link technology has given way to ASIC-like densities and in-system Flash-based re-programmability. I/O cells have improved to provide higher speed interfaces， differential interfaces， high-drive and sink pins， as well as offering dynamic bi-directional control. Very useful on-chip resources include oscillators， PLLS， regulators， charge pumps， and other system functions.

　　One key advance is function libraries available for today’s PLDs， CPLDs， and FPGAs that provide canned function-block solutions to simple and complex sub-systems. While some IP is bought or licensed， device makers provide many free IP blocks to entice us into using their parts. These include UARTs， I²C and SPI interfaces， memory controllers and more.

　　Tools make a difference， as well， and here， most PLD makers have their own or receive support from third parties. Tools can be free or expensive. It is not always true that you get what you pay for. In many cases， free or low-cost tools are as good as the store-bought flavors or better. This is especially true when it comes to taking advantage of specific CPLD and FPGA architectures.