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TI 标志5449会变的的问题

我最近发现有时候TI 标志5449会变成FFFF,有时候校验和也变成了FFFF,导致芯片就不工作,不知道大家有没有什么遇到过这样的情况,请问TI工程师这样的问题是怎么样照成的了,有什么解决办法吗?

TKS