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