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关于dp80640的LINK_LED 闪烁

Other Parts Discussed in Thread: DP83640

大侠们好,

        用了一片dp83640,led模式配置为mode2,如下:

In Mode 2, LEDs are configured as follows:
LED_LINK = ON for Good Link, BLINK for Activity
LED_SPEED = ON in 100 Mb/s, OFF in 10 Mb/s
LED_ACT = ON for Collision, OFF for No Collision

    这里说LED_LINK闪烁时是activity,这是什么状态,我的板子运行一段时间后,LED_LINK灯就不是常亮,而是闪烁,通信也不正常了,有可能是什么原因呢?谢谢。