IEEE BPE Channel Model Update on Supporting EvidenceBrian SeemannXilinx, Inc.13 July 2004
Objectives
• Promised update from presentation given at May Long Beach Meeting– ATCA Backplane signaling, now with crosstalk
-60
-40
-20
0
0 2 4 6 8 10
Kap2 - HmzdN13SITdyneGbxN13SIM34 - PicmgDF - XlnxGbxFr4E - Xlnx0xtFr4F40 - WinSipRogG - Tier1HmzdF40 - WinSipN13Agreed Ch Ad Hoc
Frequency (GHz)
SDD
21 (d
B)Compare Backplanes
With Channel Ad Hoc Curve
Backplanes wrt Proposed SDD21 Shows that slightly better
materials easily accommodate longer
runs
-500
-250
0
250
500
0 2 4 6 8 10
Ch Ad HocKap2 - HmzdN13SIM34 - PicmgDF - XlnxGbxFr4E - Xlnx0xtFr4F40 - WinSipRogG - Tier1HmzdF40 - WinSipN13
Freq (GHz)
Tim
e (p
icos
ec)
BackplaneGroup Delay
Backplanes wrt Proposed SDD21 Phase
-100
-80
-60
-40
-20
0
0 2 4 6 8 10
Ch Ad HocValue
Frequency (GHz)
Xtal
k Tr
ansf
er (d
B)
Measured NEXT Crosstalk24 Paths
Tier1 ZD vert/horiz/diagXilinx ERNIFR4 vert/horiz/diagXilinx ERNIRog vert/horiz/diag Winch 40inch row/out/diagWinch 20inch row/out/diag
Crosstalk
ATCA Backplane
SDD21 ATCA Example
Channel ModelLine
SDD11 ATCA Example
Crosstalk ATCA Example
Data not c
urrent
10Gbps Silicon over ATCA
Slot 1-15 on Full Mesh ATCA20.5” BP+2x2” Probe Card+2x3” Si Board=30.5 inchesNon-optimal Probe cardBER
10Gbps Silicon over ATCA
Show the A
TCA Spec
trum
Summary
• ATCA Backplane was presented consistent with– Channel Model– High volume application (economic justification)
• Data was presented showing – Electrical characterizations relative to the channel model – Signaling over the channel with full Crosstalk
• Conclusion:– High volume application can be built and can be signaled
across
IEEE BPE Channel Model Update on Supporting EvidenceObjectivesBackplanes wrt Proposed SDD21Backplanes wrt Proposed SDD21 PhaseCrosstalkATCA BackplaneSDD21 ATCA ExampleSDD11 ATCA ExampleCrosstalk ATCA Example10Gbps Silicon over ATCA10Gbps Silicon over ATCASummary