MTK Nucleus操作系统深度分析，对于想深入了解MTK操作系统的工程师，是一个很好的帮助。-MTK Nucleus operating system, the depth of analysis, who want in-depth understanding of the operating system MTK engineers, is a good help.

The causation is that the USB kernal uses the base memory at POST stage, and the base memory is conflicted with these programs. To solve these problems, the USB kernal will use the shadow RAM at whole time.