Xilinx SelectIO 7 Series - Page 58

58 www.xilinx.com 7 Series FPGAs SelectIO Resources User Guide
UG471 (v1.10) May 8, 2018
Chapter 1: SelectIO Resources
There are no optional current drive strength settings for LVDCI drivers. When the driver
impedance is one-half of the VRN/VRP reference resistors, it is indicated by the addition
of DV2 to the attribute name.
X-Ref Target - Figure 1-4 3
Figure 1-43: Unidirectional Controlled Impedance Driver with
Half Impedance Topology
X-Ref Target - Figure 1-4 4
Figure 1-44: Bidirectional Controlled Impedance Driver with
Half Impedance Topology
Z
0
IOB
IOB
LVDCI_DV2
LVDCI_DV2
ug471_c1_33_011811
R
0
= ½R
VRN
= ½R
VRP
= Z
0
Z
0
IOB
IOB
LVDCI_DV2
LVDCI_DV2
ug471_c1_34_011811
R
0
= ½R
VRN
= ½R
VRP
= Z
0
R
0
= ½R
VRN
= ½R
VRP
= Z
0
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