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The SSE-200 provides a single timestamp input, TSVALUEB[63:0], that is used by any debug logic in the subsystem that requires a timestamp. The timestamp input is 64-bits wide and is synchronous to DEBUGSYSCLK and therefore synchronous also to SYSCLK.
The part of the subsystem on the potentially faster FCLK also uses this timestamp for Trace generation without interpolators to increase the granularity of the timestamp. Therefore as the FCLK to SYSCLK ratio increases, especially beyond 10:1, the timestamp granularity is degraded, which reduces the ability to accurately determine traced events timings between the two clock domains.