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为什么我从TI官网下的PCB解压包解压后用Altium Design打开.SCH文件是空白的

Other Parts Discussed in Thread: MSP430F5529, DXP

最近想做个MSP430F5529的最小系统用在小车上,所以重新设计PCB,从他官网下来的5529EXP实验板的PCB设计图压缩包,在我解压后用Altium Design打开.SCH文件显示是一张空白图。我放置的是英文目录,不是中文目录。求个大神帮忙解决下,万分感谢  我是在这个网站http://www.ti.com/tool/msp-exp430f5529    的More Literature下下载的MSP-EXP430F5529 Experimenter Board PCB Design Files.zip压缩包。