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C6747 SD初始化

由于SD初始化时钟频率要求足够低,所以考虑降低SYSCLK2的分频比DIV2,但是在gel文件修改后,通过仿真器debug无法正常运行。是否必须满足SYSCLK1/SYSCLK6、SYSCLK2、SYSCLK4分频率满足1:2:4。按照这个比例修改后,debug后仍无法运行调试。还是说修改SYSCLK的DIV2不需要gel文件中修改