You have read the datasheet right! - the Electrical Characteristics section.
Even if it appears to work, parts of it may have failed, or stressed to the point that they will fail soon. Any necessary over-voltage protection should ideally be designed into your circuit's power-supply design.
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您已正确阅读数据表！ - 电气特性部分。
即使它看起来有效，它的某些部分也可能失败，或者强调到它们将失败的程度很快就会失败。理想情况下，任何必要的过压保护都应设计到电路的电源设计中。
You have read the datasheet right! - the Electrical Characteristics section.
Even if it appears to work, parts of it may have failed, or stressed to the point that they will fail soon. Any necessary over-voltage protection should ideally be designed into your circuit's power-supply design.
它会编程吗？ I/O 端口是否工作？难道是散发出魔法烟雾？
很可能，它已经死了。
Does it program? Do the I/O ports work? Did it emit magic smoke?
Likely, its dead.