[FAQ] DP83869HM: Link ok vs Link status signal

Both link ok and link status are functionally the same signal (High when a link is established, low when link is not present). Both signals will rise at the same time, however there is a timing difference when it comes to link drop in FLD mode:

1. The ‘link ok’ signal will go low after a timer expiry (around 750ms) after the actual link drop. This signal is the default for LED_0.
2. The GPIO-mappable ‘link status’ signal bypasses this timer and will immediately react to a link drop.
3. There is an option to bypass the timer on the ‘link ok’ signal by writing a 1 to register 0x2D[14]:

When bypassing the timer on ‘link ok’ using 0x2D[14], both ‘link ok’ and ‘link status’ drop at the same time.