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First failing ddr path

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Nov 24th, 2017
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  1. Timing constraint: TS_crg_pll_2_ = PERIOD TIMEGRP "crg_pll_2_" TS_crg_clk100b / 1.5 PHASE 3.88888889 ns HIGH 50%;
  2. For more information, see Period Analysis in the Timing Closure User Guide (UG612).
  3. 339 paths analyzed, 260 endpoints analyzed, 1 failing endpoint
  4. 1 timing error detected. (1 setup error, 0 hold errors, 0 component switching limit errors)
  5. Minimum period is 6.683ns.
  6. --------------------------------------------------------------------------------
  7.  
  8. Paths for end point ddrphy_record1_address_5 (SLICE_X41Y60.B1), 3 paths
  9. --------------------------------------------------------------------------------
  10. Slack (setup path): -0.010ns (requirement - (data path - clock path skew + uncertainty))
  11. Source: lm32_cpu/load_store_unit/d_adr_o_6 (FF)
  12. Destination: ddrphy_record1_address_5 (FF)
  13. Requirement: 3.888ns
  14. Data Path Delay: 3.261ns (Levels of Logic = 2)
  15. Clock Path Skew: -0.413ns (2.024 - 2.437)
  16. Source Clock: sys_clk rising at 0.000ns
  17. Destination Clock: sdram_half_clk rising at 3.888ns
  18. Clock Uncertainty: 0.224ns
  19.  
  20. Clock Uncertainty: 0.224ns ((TSJ^2 + DJ^2)^1/2) / 2 + PE
  21. Total System Jitter (TSJ): 0.070ns
  22. Discrete Jitter (DJ): 0.195ns
  23. Phase Error (PE): 0.120ns
  24.  
  25. Maximum Data Path at Slow Process Corner: lm32_cpu/load_store_unit/d_adr_o_6 to ddrphy_record1_address_5
  26. Location Delay type Delay(ns) Physical Resource
  27. Logical Resource(s)
  28. ------------------------------------------------- -------------------
  29. SLICE_X39Y51.BQ Tcko 0.430 lm32_cpu/load_store_unit/d_adr_o<8>
  30. lm32_cpu/load_store_unit/d_adr_o_6
  31. SLICE_X41Y56.B6 net (fanout=3) 0.832 lm32_cpu/load_store_unit/d_adr_o<6>
  32. SLICE_X41Y56.B Tilo 0.259 basesoc_grant1
  33. lut5103_564_1
  34. SLICE_X41Y60.B1 net (fanout=2) 1.367 lut5103_5641
  35. SLICE_X41Y60.CLK Tas 0.373 ddrphy_record0_address<4>
  36. ][8258_2600
  37. ddrphy_record1_address_5
  38. ------------------------------------------------- ---------------------------
  39. Total 3.261ns (1.062ns logic, 2.199ns route)
  40. (32.6% logic, 67.4% route)
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