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我用的评估板是TMDXEVM6678LE，查看DEVSPEED值为800MHz，不知道在1.0版本，这个寄存器是否有效？评估板默认频率不是1.0GHz吗？
有效，上电后会根据DEVSPEED在BOOTROM中设定初始频率。之后可以在应用程序中进行重设频率。
