18.104.22.168.2. DPA Mode
The DPA block chooses the best possible clock (dpa_fast_clock) from the eight fast clocks that the I/O PLL sent. This serial dpa_fast_clock clock is used for writing the serial data into the synchronizer. A serial fast_clock clock is used for reading the serial data from the synchronizer. The same fast_clock clock is used in data realignment and deserializer blocks.
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