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TMS320F28377S 76 Pin 脚GPIO可以悬空吗?

Other Parts Discussed in Thread: TMS320F28377S

你好,请问!

          TMS320F28377S  76 Pin 脚GPIO可以悬空吗?我们的设计目前是悬空的,但是调试时发现通电后不能工作,触摸一下TMS320F28377S  76 Pin 脚,就能正常工作了,做了5台样机,都是这种现象,请问这里该做怎么样的优化设计,谢谢!