Can interrupts be generated for the LinkUp cable plugged using Auto Negotiation?
The Auto Negotiation complete interrupt is probably the best option for getting an interrupt to indicate that the link is up. Even if the link partner does not support Auto Negotiation, the device will resolve the connection via parallel detection, and give an Auto Negotiation Complete interrupt. Otherwise polling the LINK bit of XR1 is the other option. The LS bit of XR8 is latching high and cleared by reading it. So it will only be read as 1 the first time the register is read immediately after a link down occurs.
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