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根据手册，TMS320C6678的最大寻址空间是8GB,但DDR的可用空间是0x80000000-0xFFFFFFFF,一共2GB，现在设计了2组DDR3，即10片IS46TR16512,两组片选，一共实现8GB。
有没有比较详细的测试例程？
可以参考我们local FAE写的K1_STK_v1.1软件包，里面有memory测试的代码，可能需要根据您的硬件做些修改。https://e2echina.ti.com/support/processors/f/processors-forum/47664/faq-keystone1#pi239031350=2
