问题描述：
MDK工程在进入调试模式时，Commond窗口提示：
Cannot access Memory
Error while accessing a target resource. The resource is perhaps not available or a wrong access was attempted.
*** error 57: illegal address (0x08000000)
解决方法：
在Options for Target-》Debug-》Settings-》Debug-》Download Options对话框中取消勾选Download to Flash选项。即可
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