XC4VFX60-11FFG672I Xilinx Inc, XC4VFX60-11FFG672I Datasheet - Page 241

• Manufacturer Part Number: XC4VFX60-11FFG672I
• Description: IC FPGA VIRTEX-4 FX 60K 672-FBGA
• Manufacturer: Xilinx Inc
• Series: Virtex™-4r

Specifications of XC4VFX60-11FFG672I

• Number Of Logic Elements/cells: 56880
• Number Of Labs/clbs: 6320
• Total Ram Bits: 4276224
• Number Of I /o: 352
• Voltage - Supply: 1.14 V ~ 1.26 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 100°C
• Package / Case: 672-BBGA, FCBGA
• For Use With: HW-V4-ML410-UNI-G - EVALUATION PLATFORM VIRTEX-4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

Virtex-4 FPGA User Guide
UG070 (v2.6) December 1, 2008
DCI in Virtex-4 FPGA Hardware
R
Driver with Termination to V
Some I/O standards, such as HSTL Class II, require an output termination to V
Figure
DCI can provide output termination to V
the impedance of the termination, but not the driver. Both HSTL and SSTL standards need
50Ω external reference resistors. The DCI I/O standards supporting drivers with split
termination are: HSTL_II_DCI, HSTL_II_DCI_18, SSTL2_II_DCI, SSTL18_II_DCI,
DIFF_HSTL_II_DCI, DIFF_HSTL_II_DCI_18, DIFF_SSTL2_II_DCI, and
DIFF_SSTL18_II_DCI.
Figure 6-13
DCI works with single-ended I/O standards and the 2.5V LVDS I/O standard. DCI
supports the following Virtex-4 FPGA standards:
LVDCI, HSLVDCI, LVDCI_DV2, GTL_DCI, GTLP_DCI, HSTL_I_DCI, HSTL_II_DCI,
HSTL_III_DCI, HSTL_IV_DCI, HSTL_I_DCI_18, HSTL_II_DCI_18, HSTL_III_DCI_18,
HSTL_IV_DCI_18, SSTL2_I_DCI, SSTL2_II_DCI, SSTL18_I_DCI, SSTL18_II_DCI,
DIFF_HSTL_II_DCI, DIFF_HSTL_II_DCI_18, DIFF_SSTL2_II_DCI, DIFF_SSTL18_II_DCI,
LVDS_25_DCI, and LVDSEXT_25_DCI.
To correctly use DCI in a Virtex-4 device, users must follow the following rules:
Figure 6-13: Driver with Termination to V
6-12).
illustrates a driver with split termination inside a Virtex-4 device.
Figure 6-12: Driver with Termination to V
Virtex-4 FPGA
www.xilinx.com
CCO
Virtex-4 FPGA DCI
IOB
/2 (Split Termination)
SelectIO Technology Resources General Guidelines
V
CCO
2R
2R
CCO
V
CCO
IOB
/2 using split termination. DCI only controls
R
/2
CCO
/2 Using DCI Split Termination
UG070_6_12_030708
Z
Z
UG070_6_13_030708
0
0
CCO
/2 without DCI
CCO
/2 (see
241