嵌入式系统硬件PCB图设计及布线过程中应遵循的原则不包括（)。
- A.先复杂后简单
- B.核心器件优先
- C.高速信号优先
- D.先局部后整体
正确答案及解析
正确答案
解析
PCB图设计及布线的步骤为：1、确定PCB机构尺寸；2、从原理图设计软件生成网络表并导入PCB设计软件；3、器件布局：采用先核心器件、后外围器件的原则进行；4、布线：对于核心器件和高速信号要优先进行布线；5、后处理：主要包括修改不合理的走线或者多与的走线；电源层平面分割；铺铜；排列文件；添加各种表示符号等。因此，应遵循先复杂后简单的原则，优先布局核心复杂器件，然后布局外围简单器件；布线时核心器件和高速信号优先。
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