smartpreview.twr

FPGA芯片与ADI公司的AD9779之间的通信

Number of Timing Constraints that were not applied: 1

Asterisk (*) preceding a constraint indicates it was not met.
   This may be due to a setup or hold violation.

------------------------------------------------------------------------------------------------------
  Constraint                                |  Check  | Worst Case |  Best Case | Timing |   Timing   
                                            |         |    Slack   | Achievable | Errors |    Score   
------------------------------------------------------------------------------------------------------
  TS_u_PLL_tx_CLKOUT0_BUF = PERIOD TIMEGRP  | SETUP   |     1.640ns|     4.220ns|       0|           0
  "u_PLL_tx_CLKOUT0_BUF" TS_USER_CLK /      | HOLD    |     0.624ns|            |       0|           0
      4 HIGH 50%                            |         |            |            |        |            
------------------------------------------------------------------------------------------------------
  TS_CLK_50M = PERIOD TIMEGRP "CLK_50M" 20  | SETUP   |    18.321ns|     1.679ns|       0|           0
  ns HIGH 50%                               | HOLD    |     0.658ns|            |       0|           0
------------------------------------------------------------------------------------------------------
  TS_USER_CLK = PERIOD TIMEGRP "USER_CLK" 3 | N/A     |         N/A|         N/A|     N/A|         N/A
  0 ns HIGH 50%                             |         |            |            |        |            
------------------------------------------------------------------------------------------------------


Derived Constraint Report
Derived Constraints for TS_USER_CLK
+-------------------------------+-------------+-------------+-------------+-------------+-------------+-------------+-------------+
|                               |   Period    |       Actual Period       |      Timing Errors        |      Paths Analyzed       |
|           Constraint          | Requirement |-------------+-------------|-------------+-------------|-------------+-------------|
|                               |             |   Direct    | Derivative  |   Direct    | Derivative  |   Direct    | Derivative  |
+-------------------------------+-------------+-------------+-------------+-------------+-------------+-------------+-------------+
|TS_USER_CLK                    |     30.000ns|          N/A|     16.880ns|            0|            0|            0|         1216|
| TS_u_PLL_tx_CLKOUT0_BUF       |      7.500ns|      4.220ns|          N/A|            0|            0|         1216|            0|
+-------------------------------+-------------+-------------+-------------+-------------+-------------+-------------+-------------+

All constraints were met.
INFO:Timing:2761 - N/A entries in the Constraints list may indicate that the 
   constraint does not cover any paths or that it has no requested value.