XC4VFX40-11FFG672I Xilinx Inc, XC4VFX40-11FFG672I Datasheet - Page 83

• Manufacturer Part Number: XC4VFX40-11FFG672I
• Description: IC FPGA VIRTEX-4 FX 40K 672-FBGA
• Manufacturer: Xilinx Inc
• Series: Virtex™-4r

Specifications of XC4VFX40-11FFG672I

• Number Of Logic Elements/cells: 41904
• Number Of Labs/clbs: 4656
• Total Ram Bits: 2654208
• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

Virtex-4 FPGA User Guide
UG070 (v2.6) December 1, 2008
Board-Level Clock Generation
R
The board-level clock generation example in
generate output clocks for other components on the board. This clock can then be used to
interface with other devices. In this example, a DDR register is used with its inputs
connected to GND and V
stays within global routing until it reaches the output register. The quality of the clock is
maintained.
If the design requires global buffers in other areas, use an OBUF instead of BUFG and
ODDR
However, the clock quality will not be as well preserved as when connected using a global
buffer and a DDR register
(Figure
IBUFG
IBUF
2-10).
CC
www.xilinx.com
(Figure
. Because the output of the DCM is routed to BUFG, the clock
Figure 2-8: Standard Usage
2-11).
CLKIN
CLKFB
RST
DCM_BASE
Figure 2-9
CLKFX180
CLK2X180
LOCKED
CLK180
CLK270
CLKDV
CLKFX
illustrates how to use a DCM to
CLK2X
CLK90
CLK0
Application Examples
UG070_2_07_071204
BUFG
OBUF
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