密码保护不允许固件更新。想要进行固件更新，先要取消密码保护，在完成固件更新后，再重新设定密码。.OEM保护与密码和权力级别相似。然而，OEM保护提供了更高的安全级别。用1~7位字符作为密码确定使用/不使用OEM保护特征。OEM保护特征使能时，禁止对CPU程序进行任何读写操作。
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