Xilinx SelectIO 7 Series User Manual page 186

Appendix A: Termination Options for SSO Noise Analysis
X-Ref Target - Figure A-1
Unterminated
Z=50
50Far-end Parallel Termination to V
FP_VCCO_50
Z=50
1KFar-end Parallel Termination to V
FP_VCCO_1000
Z=50
50Far-end Parallel Termination to 3.3V
FP_3.3_50
Z=50
1KFar-end Parallel Termination to 3.3V
FP_3.3_1000
Z=50
50Far-end Parallel Termination to V
FP_VTT_50
Z=50
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CCO
V
CCO
50
CCO
V
CCO
1K
3.3V
50
3.3V
1K
TT
V = V /2
TT CCO
50
Figure A-1: Default Terminations
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50Near-end Parallel Termination to V
50Far-end Parallel Termination to V
NP_VTT_50_FP_VTT_50
V
V = V /2
TT
TT CCO
50
50
Z=50
100Far-end Differential Termination
FD_100
Z DIFF =100
165Near Series, 140Near Differential,
100Far Differential
NS_165_ND_140_FD_100
165
Z=50
140
165
Z=50
70Near Series, 187Near Differential,
100Far Differential
NS_70_ND_187_FD_100
70
Z=50
187
70
Z=50
7 Series FPGAs SelectIO Resources User Guide
UG471 (v1.10) May 8, 2018
TT
TT
= V /2
CCO
100
100
100
ug471_aA_01_050212