XC4VFX12-11FFG668C Xilinx Inc, XC4VFX12-11FFG668C Datasheet - Page 240

• Manufacturer Part Number: XC4VFX12-11FFG668C
• Description: IC FPGA VIRTEX-4 FX 12K 668FCBGA
• Manufacturer: Xilinx Inc
• Series: Virtex™-4r

Specifications of XC4VFX12-11FFG668C

• Number Of Logic Elements/cells: 12312
• Number Of Labs/clbs: 1368
• Total Ram Bits: 663552
• Number Of I /o: 320
• Voltage - Supply: 1.14 V ~ 1.26 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 668-BBGA, FCBGA
• For Use With: HW-V4-ML403-UNI-G - EVALUATION PLATFORM VIRTEX-4HW-AFX-FF668-400 - BOARD DEV VIRTEX 4 FF668
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

Chapter 6: SelectIO Resources
240
Driver with Termination to V
Some I/O standards (e.g., HSTL Class IV) require an output termination to V
Figure 6-10
DCI can provide an output termination to V
only controls the impedance of the termination, but not the driver. Both GTL and HSTL
standards need 50Ω external reference resistors. The DCI I/O standards supporting
drivers with single termination are: GTL_DCI, GTLP_DCI, HSTL_IV_DCI, and
HSTL_IV_DCI_18.
Figure 6-11
Figure 6-11: Driver with Termination to V
illustrates a driver with single termination inside a Virtex-4 device.
illustrates an output termination to V
Figure 6-10: Driver with Termination to V
Virtex-4 FPGA
www.xilinx.com
CCO
Virtex-4 FPGA DCI
(Single Termination)
IOB
V
CCO
R
CCO
V
CCO
IOB
using single termination. In this case, DCI
R
CCO
CCO
.
UG070_6_10_030708
Using DCI Single Termination
Z
UG070_6_11_030708
Z
0
0
CCO
UG070 (v2.6) December 1, 2008
without DCI
Virtex-4 FPGA User Guide
CCO
.
R