Original question:
Tool/software:
I am facing the similar situation and I am wondering there this SGMII mask is define. I did not found any definition like that. Can you help ma and name the standard / specification. thank you
Hi Viktor,
Here is the eye mask definition for SGMII:
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|
867 |
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Min |
Typ |
Max |
|
Output VOD (differential-peak) |
150mV |
|
400mV |
|
Driver termination |
|
100 |
|
|
Output rise/fall time |
100ps |
|
200ps |
|
Output jitter |
|
|
300ps |
|
Input VOD threshold (differntial-peak) |
100mV |
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|
|
Input termination |
|
100 |
|
|
|
|
|
|
Thank you,
Evan
Hi Viktor,
The 180ps is arbitrary margin, please only consider the spec defined within the eye for reference:
Regarding 0.55UI / 0.25UI, this is from Driver AC specification:
The diagram assumes rise/fall time of ~144ps.
0.55UI - 0.25UI = 240ps (full signal rise/fall)
(20%-80%) x 240ps = 144ps
Thank you,
Evan
