Xilinx Synthesis Technology User Guide

XST User Guide
TIMING REPORT
NOTE: THESE TIMING NUMBERS ARE ONLY A SYNTHESIS ESTIMATE.
FOR ACCURATE TIMING INFORMATION PLEASE REFER TO THE
TRACE REPORT GENERATED AFTER PLACE-and-ROUTE.
Clock Information:
------------------
+---------------------------------+----------------------------+--------+
| Clock Signal | Clock buffer(FF name) | Load |
+---------------------------------+----------------------------+--------+
| clk | BUFGP | 14 |
+---------------------------------+----------------------------+--------+
Timing Summary:
---------------
Speed Grade: -6
Minimum period: 8.082ns (Maximum Frequency: 123.732MHz)
Minimum input arrival time before clock: 4.081ns
Maximum output required time after clock: 9.497ns
Maximum combinational path delay: 8.232ns
Timing Detail:
--------------
All values displayed in nanoseconds (ns)
------------------------------------------------------------------
Timing constraint: Default period analysis for Clock 'clk'
Delay: 8.082ns (Levels of Logic = 2)
Source: sixty_lsbcount_qoutsig_0
Destination: sixty_msbcount_qoutsig_2
Source Clock: clk rising
Destination Clock: clk rising
9-10 Xilinx Development System