DS-FND-BSX-PC Xilinx Inc, DS-FND-BSX-PC Datasheet - Page 281
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: 281 of 330
- Download datasheet (3Mb)
Foundation Series 2.1i User Guide
The following UCF file corresponds to the above example.
In the NET statement shown above, the TPSYNC is attached to the
output net of a 3-state buffer called BUS3STATE. If a TPSYNC is
attached to a net, then the source of the net is considered to be the
endpoint (in this case, the 3-state buffer itself). The subsequent
TIMESPEC statement can use the TPSYNC name just as it uses a
TNM name.
The next TPSYNC UCF file example shows you how to use the
keyword PIN instead of NET if you want to attach an attribute to a
pin.
In this example, the instance name of the 3-state buffer is stated
followed by the pin name of the enable (.T). If a TPSYNC is attached
to a primitive input pin, then the primitive’s input is considered the
startpoint or endpoint for a timing specification. If it is attached to a
output pin, then the output of the primitive is used.
# TPSYNC example; pad to a 3-state buffer enable pin
# Note TPSYNC attached to 3-state buffer’s output NET
NET BUS3STATE TPSYNC=bus3;
TIMESPEC TSNewSpc3=FROM:PAD(ENABLE_BUS):TO:bus3:20ns;
# Note TPSYNC attached to 3-state buffer’s enable PIN
PIN $1I6/BUSMACRO1/TRIBUF34.T TPSYNC=bus1;
TIMESPEC TSNewSpc1=FROM:PAD(ENABLE_BUS):TO:bus1:20ns;
ENABLE_BUS
BUS0
B3
TSNewSpa3=FROM:PAD(ENABLE_BUS):TO:bus3:20ns
D
EN
TIMESPEC
Q
TPSYNC=BUS3
BUS3STATE
X8569
Foundation Constraints
B-9
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