Xilinx virtex-5 fpga

272 www.xilinx.com Virtex-5 FPGA User Guide
UG190 (v5.0) June 19, 2009
Chapter 6: SelectIO Resources
X-Ref Target - Figure 6-64
Figure 6-64: HSTL Class IV (1.8V) with Bidirectional Termination
Z
0
IOB
IOB
HSTL_IV_18
HSTL_IV_18
ug190_6_61_030306
V
TT
= 1.8V
R
P
= Z
0
= 50Ω
V
TT
= 1.8V
R
P
= Z
0
= 50Ω
Z
0
IOB
IOB
HSTL_IV_DCI_18
HSTL_IV_DCI_18
V
CCO
= 1.8V
R
VRP
= Z
0
= 50Ω
V
REF
= 1.1V
V
REF
= 1.1V
+
–
V
REF
= 1.1V
+
–
External Termination
DCI
V
CCO
= 1.8V
R
VRP
= Z
0
= 50Ω
V
REF
= 1.1V