DS-FND-BSX-PC Xilinx Inc, DS-FND-BSX-PC Datasheet - Page 301
DS-FND-BSX-PC
Manufacturer Part Number
DS-FND-BSX-PC
Description
FOUNDATION BASE SYS W/SYN EXPRES
Manufacturer
Xilinx Inc
Type
Foundation Systemr
Datasheet
1.DS-FND-BSX-PC.pdf
(330 pages)
Specifications of DS-FND-BSX-PC
For Use With/related Products
Xilinx Programmable Logic Devices
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
122-1185
- Current page: 301 of 330
- Download datasheet (3Mb)
Foundation Series 2.1i User Guide
User Constraint File Example
The user constraint file (.ucf) is a user-created ASCII file that holds
timing and location constraints. It is read by NGDBuild during the
translate process and is combined with an EDIF or XNF netlist into an
NGD file. If a UCF file exists with the same name as the top-level
netlist, then it will automatically be read. Otherwise, specify a file for
User Constraints in the Implement Control Files Settings dialog box.
For Foundation 2.1i, if you already have an existing UCF file
associated with a Revision, this UCF file is automatically copied and
used as your UCF file within a new revision.
The following example shows how to lock I/Os to pin locations and
how to write Timespec and Timegroup constraints.
Note: You can also lock pin locations within the Project Manager by
selecting Tools
Figure B-2 Locking I/Os to Pin Locations
IPAD
IPAD8
FRED
JIM[7:0]
Schematic of Hierarchy Block
LOU[7:0]
IBUF
Implementation
IBUF8
IBUF8
TED
IT[7:0]
JACK[7:0]
OBUF
OPAD8
NED
Hierarchy Block
LOU[7:0]
Lock Device Pins.
OPAD
X8076
Foundation Constraints
B-29
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