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你好，请问：是否每颗ARM SOC芯片都有一个ID识别码？谢谢。

三人行

你好，

请问：1、是否每颗ARM SOC芯片都有一个ID识别码？ 2、这个ID是硬件写死的吗？还是由底层软件定义设置的？若是由软件设置则ID就是可修改的，ID还有什么意义呢？

谢谢。