SPRZ488D March 2022 – September 2023 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
CPSW: Host Timestamps Cause CPSW Port to Lock up
When the CPTS host timestamp is enabled every packet to the internal CPSW port FIFO requires a timestamp from the CPTS. When the packet preamble gets corrupted due to EMI or any other corruption mechanism then a timestamp request might not be sent to the CPTS. In this case the CPTS will not produce the timestamp which causes a lockup condition in the CPSW port FIFO. When the CPTS host timestamp is disabled by clearing the tstamp_en bit in the CPTS_CONTROL register the lockup condition is prevented from occurring.
None. Ethernet to host timestamps must be disabled.