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求助,MSP430FR5969固件与软件版本不匹配,提示升级,升级失败

Other Parts Discussed in Thread: MSP-FET

今天突然提示说要升级,第一次我选择否,然后下载失败,第二次选择是,结果升级失败,出现致命性错误,com口是正常的,用的是ez-FET下载程序。

请问该怎么解决,为什么会出现这个原因,真的是上一秒还能正常用,下一秒就失败了。