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随着设计的新系统需要越来越多的智能,8位和16位的控制器正在让位给32位RISC处理器。但是,第1代和第2代RISC处理器相对高的成本使它们推迟进入注重成本的应用领域如消费产品、电子游戏机和汽车系统。 但是,随着设计师开始关注系统总成本而不是只盯着CPU芯片的成本,最新的高度集成的32位处理器采用了比从前更为经济有效的32位结构。最近两年,各家ASIC和CPU厂家提供的“单片系统”方法也越来越受到关注。在这种方法中,设计师从基本的CPU核心开始,再增加一些标准的和定制的宏单元。因此,他们可以巧妙设计出针对系统进行优化的处理方案,其别出心裁的设计使竞争对手难以模仿。
As new systems are designed that require more and more intelligence, 8-bit and 16-bit controllers are giving way to 32-bit RISC processors. However, the relatively high cost of first- and second-generation RISC processors slows them into cost-conscious applications such as consumer products, video game consoles, and automotive systems. However, as designers begin to focus on the total cost of the system instead of just staring at the cost of the CPU chip, the latest highly integrated 32-bit processor uses a more cost-effective 32-bit architecture than before. In the last two years, the “monolithic” approach offered by various ASICs and CPU manufacturers has also drawn increasing attention. In this approach, designers start with the basic CPU core and add some more standard and custom macrocells. As a result, they can intelligently design a system-optimized solution that is uniquely designed to make it hard for competitors to imitate.