SPRZ488E March   2022  – May 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1

 

  1.   1
  2. 1Usage Notes and Advisories Matrices
  3. 2Silicon Usage Notes
    1.     i2324
    2.     i2348
    3.     i2364
  4. 3Silicon Advisories
    1.     i2310
    2.     i2311
    3.     i2313
    4.     i2329
    5.     i2345
    6.     i2346
    7.     i2347
    8.     i2349
    9.     i2350
    10.     i2352
    11.     i2353
    12.     i2354
    13.     i2355
    14.     i2356
    15.     i2357
    16.     i2358
    17.     i2359
    18.     i2374
    19.     i2375
    20.     i2386
    21.     i2392
    22.     i2393
    23.     i2394
    24.     i2395
    25.     i2401
    26.     i2402
    27.     i2403
    28.     i2404
    29.     i2405
    30.     i2427
    31.     i2428
    32.     i2433
    33.     i2438
    34.     i2439
  5.   Trademarks
  6. 4Revision History

i2439

CPSW: Host to Ethernet Timestamp Accuracy Issue

Details:

When a packet is sent from the Host to Ethernet with a timestamp to be generated on Ethernet egress, a packet length with 0xD5 in the lower 8-bits results in a timestamp error.

Using timestamp for PTP messages should not be impacted as the PTP messages are usually much shorter than 0xD5 packet length.

Workaround(s):

Ethernet timestamp should be enabled only for PTP messages on Host Tx.