Clarification on sync slave FIFO timing

[Anonymous]

I'm trying to understand the difference between dedicated and current thread flags as it relates to the synchronous slave FIFO read/write timing.  AN65974 says that for a current thread flag there's a two cycle latency. It doesn't specify read or write although a two cycle latency is consistent with the synchronous slave read timing diagram.

   

If I use a current thread flag, do I incur an extra two cycle latency in addition to the two cycle latency shown for the dedicated thread flag?  If not whats the timing difference between the two.  

[Anonymous]

Great question Ray.  Sounds like you have an old version of AN65974 that was released before it made any sense. A new, more coherent version is now available that explains the timing and flag configuration in more detail.