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vrangan

Tiger DRAM timing scan failure

Jul 6th, 2023
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  1. $ python3 main.py --cs_map 1 --scan_lfsr 0 0x55555555AAAAAAAA 800 1100
  2. 1 Rank Device
  3. ---Scan DQ output---
  4. FAIL 800: 11111111111111110000000000000000
  5. FAIL 808: 11111111111111110000000000000000
  6. FAIL 816: 11111111111111111011111000000000
  7. FAIL 824: 11111111111111111011111000110000
  8. FAIL 832: 11111111111111111011111000110000
  9. FAIL 840: 11111111111111111011111000110000
  10. FAIL 848: 11111111111111111011111011110000
  11. FAIL 856: 11111111111111111011111011110000
  12. FAIL 864: 11111111111111111011111011110000
  13. FAIL 872: 11111111111111111011111011110000
  14. FAIL 880: 11111111111111111011111011110000
  15. FAIL 888: 11111111111111111011111011110000
  16. FAIL 896: 11111111111111111111111011110000
  17. FAIL 904: 11111111111111111111111011110000
  18. FAIL 912: 11111111111111111111111011110000
  19. FAIL 920: 11111111111111111111111011110000
  20. FAIL 928: 11111111111111111111111011110000
  21. FAIL 936: 11111111111111111111111011111100
  22. FAIL 944: 11111111111111111111111011111100
  23. FAIL 952: 11111111111111111111111111111100
  24. FAIL 960: 11111111111111111111111111111100
  25. FAIL 968: 11111111111111111111111111111100
  26. FAIL 976: 11111111111111111111111111111100
  27. FAIL 984: 11111111111111111111111111111100
  28. FAIL 992: 11111111111111111111111111111100
  29. FAIL 1000: 11111111111111111111111111111100
  30. FAIL 1008: 11111111111111110100100011111100
  31. FAIL 1016: 11111111111111110100000011111100
  32. FAIL 1024: 11111111111111110100100011111100
  33. FAIL 1032: 11111111111111110100100011111100
  34. FAIL 1040: 11111111111111110100000011111100
  35. FAIL 1048: 11111111111111110000000011111100
  36. FAIL 1056: 11111111111111110000000011111100
  37. FAIL 1064: 11111111111111110000000011111100
  38. FAIL 1072: 11111111111111110000000011111100
  39. FAIL 1080: 11111111111111110000000011111100
  40. FAIL 1088: 11111111111111110000000011111100
  41. FAIL 1096: 11111111111111110000000011111100
  42. DQ[0] start = -1.95 ps end = -1.95 ps window = 0.0 ps
  43. DQ[1] start = -1.95 ps end = -1.95 ps window = 0.0 ps
  44. DQ[2] start = 1828.12 ps end = 1828.12 ps window = 312.5 ps
  45. DQ[3] start = 1828.12 ps end = 1828.12 ps window = 312.5 ps
  46. DQ[4] start = 1609.38 ps end = 1609.38 ps window = 531.25 ps
  47. DQ[5] start = 1609.38 ps end = 1609.38 ps window = 531.25 ps
  48. DQ[6] start = 1656.25 ps end = 1656.25 ps window = 484.38 ps
  49. DQ[7] start = 1656.25 ps end = 1656.25 ps window = 484.38 ps
  50. DQ[8] start = 1859.38 ps end = 1859.38 ps window = 93.75 ps
  51. DQ[9] start = 1593.75 ps end = 1593.75 ps window = 359.38 ps
  52. DQ[10] start = 1593.75 ps end = 1593.75 ps window = 359.38 ps
  53. DQ[11] start = 1593.75 ps end = 1593.75 ps window = 421.88 ps
  54. DQ[12] start = 1593.75 ps end = 1593.75 ps window = 359.38 ps
  55. DQ[13] start = 1593.75 ps end = 1593.75 ps window = 359.38 ps
  56. DQ[14] start = 1750.0 ps end = 1750.0 ps window = 281.25 ps
  57. DQ[15] start = 1593.75 ps end = 1593.75 ps window = 359.38 ps
  58. Updated with Calibrated Result
  59. Traceback (most recent call last):
  60. File "C:\Users\Venkat\Downloads\ti_lpddr4_debug_tool-master\ti_lpddr4_debug_tool-master\main.py", line 224, in <module>
  61. json_file = ts.pattern_scan_write_dqx(
  62. ^^^^^^^^^^^^^^^^^^^^^^^^^^
  63. File "C:\Users\Venkat\Downloads\ti_lpddr4_debug_tool-master\ti_lpddr4_debug_tool-master\timing_scan.py", line 148, in pattern_scan_write_dqx
  64. raise Exception(f"pattern_scan_write_dq{8*slicex+dq}fail")
  65. Exception: pattern_scan_write_dq0fail
  66.  
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