XC4VFX40-11FFG672I Xilinx Inc, XC4VFX40-11FFG672I Datasheet - Page 344
XC4VFX40-11FFG672I
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
-
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Chapter 7: SelectIO Logic Resources
344
There are two special cases:
1.
2.
Figure 7-16: Instantiate IDELAYCTRL without LOC Constraints - RDY Unconnected
REFCLK
When the RDY port is ignored, the RDY signals of all the replacement IDELAYCTRL
instances are left unconnected.
The VHDL and Verilog use models for instantiating an IDELAYCTRL primitive
without LOC constraints leaving the RDY output port unconnected are provided.
VHDL Use Model
-- Only one instance of IDELAYCTRL primitive is instantiated.
-- The RDY port is left open
dlyctrl:IDELAYCTRL
Verilog Use Model
// Only one instance of IDELAYCTRL primitive is instantiated.
// The RDY port is left open
IDELAYCTRL dlyctrl (
The resulting circuitry after instantiating the IDELAYCTRL components is illustrated
in
When RDY port is connected, an AND gate of width equal to the number of clock
regions is instantiated and the RDY output ports from the instantiated and replicated
IDELAYCTRL instances are connected to the inputs of the AND gate. The tools assign
the signal name connected to the RDY port of the instantiated IDELAYCTRL instance
to the output of the AND gate.
Figure
RST
7-16.
port map(
.
.
.
www.xilinx.com
.
.
.
);
RDY => open,
REFCLK => refclk,
RST => rst
);
.RDY(),
.REFCLK(refclk),
.RST(rst)
all IDELAYCTRL
Replicated for
Instantiated by user
REFCLK
RST
REFCLK
RST
REFCLK
RST
IDELAYCTRL
IDELAYCTRL
IDELAYCTRL
sites
.
.
.
RDY
RDY
RDY
Auto-generated by
mapper tool
UG070 (v2.6) December 1, 2008
Virtex-4 FPGA User Guide
RDY signal ignored
UG070_7_16_032008
R
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