Link Status (bit 2)
When set to a logic one, this bit indicates that the Link
Monitor has established a valid link. If the Link Monitor
detects a link failure, this bit is set to a logic zero and remains
zero through the next read of the status register. A link failure
may be due to an error in the receive channel or an error in the
receive channel of the link partner (that is, a remote fault).
Jabber detect (bit 1)
This bit is permanently set to a logic zero.
Extended Capability (bit 0)
This bit is permanently set to a logic one indicating that the
ICS1889 has an extended register set.
ICS1889
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