Forum Discussion
RMcco
New Contributor
7 years agoHi SK -
One additional question: Registers 0x12 and 0x13 set the link timer value. According to the datasheet, the default value is 0x98968 - if those represent 8 ns ticks, that works out to 5 ms. But the datasheet says that the default is 10 ms. Is there an additional factor of two somewhere?
Also, the PHY we're using (TI DP83867) has four options for the SGMII link timer: 11 ms, 800 us, 2 us, and 16 ms. We're using the default, which is 2 us (which seems very short). This doesn't seem to be breaking auto-negotiation itself, but it's unclear if this also has an effect on the TSE declaring if/when the link goes down.
Thanks -
-Ryan