XC2VP4 XILINX [Xilinx, Inc], XC2VP4 Datasheet - Page 44

• Manufacturer Part Number: XC2VP4
• Description: Virtex-II Pro and Virtex-II Pro X Platform FPGAs
• Manufacturer: XILINX [Xilinx, Inc]

Figure 29
I/O standards. For a complete list, see the
DS083 (v4.7) November 5, 2007
Product Specification
provides examples illustrating the use of the SSTL2_I_DCI, SSTL2_II_DCI, SSTL18_I_DCI, and SSTL18_II_DCI
R
Recommended
Conventional
DCI Transmit
Conventional
Receive
Conventional
Transmit
DCI Receive
DCI Transmit
DCI Receive
Bidirectional
Reference
Resistor
Notes:
1. The SSTL-compatible 25Ω series resistor is accounted for in the DCI buffer,
2. Z 0 is the recommended PCB trace impedance.
Z 0
(2)
and it is not DCI controlled.
Figure 29: SSTL DCI Usage Examples
Virtex-II Pro
Virtex-II Pro
Virtex-II Pro Platform FPGA User Guide
25Ω
25Ω
DCI
DCI
SSTL2_I or SSTL18_I
(1)
VRN = VRP = R = Z 0
Virtex-II Pro and Virtex-II Pro X Platform FPGAs: Functional Description
(1)
R/2
R/2
50Ω
N/A
Z 0
Z 0
Z 0
www.xilinx.com
Z 0
V
V
CCO
R
R
CCO
V
Virtex-II Pro
V
Virtex-II Pro
/2
/2
CCO
CCO
2R
2R
2R
2R
DCI
DCI
25Ω
25Ω
Virtex-II Pro
Virtex-II Pro
25Ω
Virtex-II Pro
SSTL2_II or SSTL18_II
(1)
(1)
DCI
VRN = VRP = R = Z 0
DCI
(1)
V
DCI
V
CCO
2R
2R
V
2R
2R
V
R/2
CCO
CCO
CCO
V
R/2
2R
2R
CCO
R
/2
R
50Ω
/2
Z 0
Z 0
Z 0
Z 0
Z 0
DS083-2_65b_011603
V
V
R
R
.
CCO
CCO
V
2R
2R
Virtex-II Pro
V
Virtex-II Pro
V
Virtex-II Pro
CCO
CCO
CCO
/2
2R
/2
2R
2R
DCI
2R
DCI
25Ω
DCI
Module 2 of 4
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