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USB 1.1 and USB 2.0 differ in speed of debug operation (STEP execution time), downloading, and uploading.
Although the actual value varies depending on the OS and CPU,
the processing with USB 2.0 is 3 to 5 times as fast as that with USB 1.1.
There are no functions that cannot be used between USB 1.1 and USB 2.0.
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