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66AK2H12: Timer dog wdkey 进入idle

Part Number: 66AK2H12

你好

      如定时器手册中描述的WDTCR寄存器的第13-12位的WDKEY用于进去idle  mode .依次写01b和10b。请问idle  mode是个什么状态呢?是此时看门狗技术停止?我编写程序进行了尝试,发现启动看门狗模式,计数以后,对其写值不能对看门狗产生影响  这是为什么呢??