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DM6437看门狗 pre-active state 有什么作用(见下图1)?在初始化的时候,需要给WDTCR赋值两次0xA5C6400吗?(见下图2)



SPRU989 Figure10 如下图

  • 你好,

    上图是看门狗时钟的状态流程图,可以看到上电复位后,必须要经过pre-active状态后,才能进入active状态。第一个A5C6h是进入pre-active状态,第二个是进入service状态。这个流程是必须的。