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Development System Reference Guide www.xilinx.com 177
PAR Reports
R
**************************
Generating Clock Report
**************************
+---------------------+--------------+------+------+------------+----------+
| Clock Net | Resource |Locked|Fanout|Net Skew(ns)|Max Delay(ns)
+---------------------+--------------+------+------+------------+----------+
|test_lutram_bram/CLK | | | | |
| 1X | BUFGMUX1P| No | 43 | 0.023 | 0.724
+---------------------+--------------+------+------+------------+----------+
| clk_bram_BUFGP | BUFGMUX6S| No | 6 | 0.004 | 0.704
+---------------------+--------------+------+------+------------+----------+
| clk_slice_BUFGP | BUFGMUX3P| No | 4 | 0.000 | 0.700
+---------------------+--------------+------+------+------------+----------+
| clk_lut_test_BUFGP | BUFGMUX7P| No | 11 | 0.027 | 0.715
+---------------------+--------------+------+------+------------+----------+
The next portion of the PAR report lists information on timing constraints contained in the input
PCF. The first line of this section shows the Timing Score, which in this example is 0. In cases
where a timing constraint is not met, the Timing Score will be greater than 0. The lower the Tim-
ing Score, the better the result.
Note: The constraints table in this section is not generated when no constraints are given in the
input PCF, or the –x option is used.
Timing Score: 0
Asterisk (*) preceding a constraint indicates it was not met.
This may be due to a setup or hold violation.
----------------------------------------------------------------------------
Constraint | Requested | Actual | Logic
| | | Levels
----------------------------------------------------------------------------
TS_clk_lut_test = PERIOD TIMEGRP "clk_lut | 2.800ns | 2.761ns | 1
_test" 2.800 nS HIGH 50.000000 % | | |
----------------------------------------------------------------------------
TS_clk_bram = PERIOD TIMEGRP "clk_bram" | 1.400ns | 1.339ns | 1
1.400 nS HIGH 50.000000 % | | |
----------------------------------------------------------------------------
TS_clk_slice = PERIOD TIMEGRP "clk_slice" | 1.200ns | 1.150ns | 1
1.200 nS HIGH 50.000000 % | | |
----------------------------------------------------------------------------
TS_clkB = PERIOD TIMEGRP "clkB" 2.700 nS | N/A | N/A | N/A
HIGH 50.000000 % | | |
----------------------------------------------------------------------------
TS_test_lutram_bram_CLK0_W = PERIOD TIMEG | 2.700ns | 2.494ns | 0
RP "test_lutram_bram_CLK0_W" TS_clkB * 1 | | |
.000000 HIGH 50.000 % | | |
----------------------------------------------------------------------------
OFFSET = IN 600 pS BEFORE COMP "clk_lut_ | 0.600ns | 0.565ns | 1
test" TIMEGRP "Lut_test_1_and_2" | | |
----------------------------------------------------------------------------