Re: Clarification wanted: Draft 3.0 Figure 46-9 Link Fault Signaling State Machine
Daniel,
The definition of col_cnt in 46.3.4 on page 255 implies that
col_cnt increments with both edges of RX_CLK unless it is
reset. Explicit increment is unnecessary.
Ben
Daniel Koehler wrote:
>
> Hello,
>
> by inspecting Figure 46-9 in draft D3.0 on page 256 we see the following
> implementation problems.
>
> The States "COUNT" and "FAULT" reset the counter col_cnt to zero.
> But col_cnt is never incremented in any state, so the exit of these states
> based on col_cnt > 127 will never be reached.
>
> Is there some implicit meanins we just missed, or is the diagram not correct ?
>
> Another question: Is there a Jitter Spec on the XGMII TX/RX clocks ?
>
> Regards,
>
> Daniel
>
> --
> Daniel Koehler, dkoehler@xxxxxxxxxxxxxx
> MorethanIP GmbH
--
-----------------------------------------
Benjamin Brown
AMCC
2 Commerce Park West
Suite 104
Bedford NH 03110
603-641-9837 - Work
603-491-0296 - Cell
603-626-7455 - Fax
603-798-4115 - Home Office
bbrown@xxxxxxxx
-----------------------------------------