XC4VFX40-10FFG1152C Xilinx Inc, XC4VFX40-10FFG1152C Datasheet - Page 238

• Manufacturer Part Number: XC4VFX40-10FFG1152C
• Description: IC FPGA VIRTEX-4 FX 40K 1152FBGA
• Manufacturer: Xilinx Inc
• Series: Virtex™-4r

Specifications of XC4VFX40-10FFG1152C

• Number Of Logic Elements/cells: 41904
• Number Of Labs/clbs: 4656
• Total Ram Bits: 2654208
• Number Of I /o: 448
• Voltage - Supply: 1.14 V ~ 1.26 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 1152-BBGA, FCBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

Chapter 6: SelectIO Resources
238
Input Termination to V
these resistors by a factor of half. The DCI I/O standards supporting controlled impedance
drivers with half-impedance are LVDCI_DV2_15, LVDCI_DV2_18, and LVDCI_DV2_25.
Figure 6-5
reference resistors R must be 2 × Z
Some I/O standards require an input termination to V
DCI can also provide input termination to V
resistance is set by the reference resistors. Both GTL and HSTL standards are controlled by
50Ω reference resistors. The DCI I/O standards supporting single termination are:
GTL_DCI, GTLP_DCI, HSTL_III_DCI, HSTL_III_DCI_18, HSTL_IV_DCI, and
HSTL_IV_DCI_18.
Figure 6-7
illustrates a controlled driver with half impedance inside a Virtex-4 device. The
illustrates DCI single termination inside a Virtex-4 device.
Figure 6-5: Controlled Impedance Driver with Half Impedance
Figure 6-7: Input Termination Using DCI Single Termination
Figure 6-6: Input Termination to V
CCO
www.xilinx.com
(Single Termination)
Z
0
Virtex-4 FPGA DCI
Z
0
R
0
in order to match the impedance of Z
V
R/2
CCO
Virtex-4 FPGA DCI
IOB
V
IOB
REF
V
CCO
CCO
IOB
V
R
REF
using single termination. The termination
UG070_6_05_030708
Virtex-4 FPGA
UG070_6_07_030708
Z
CCO
CCO
0
UG070_6_06_102808
(see
without DCI
UG070 (v2.6) December 1, 2008
Figure
Virtex-4 FPGA User Guide
6-6).
0
.
R