126.96.36.199.3. Byte Deserializer Deserialize x4 Mode
The deserialize x4 mode is used in high-speed applications where the FPGA fabric cannot operate as fast as the TX PCS.
In deserialize x4 mode, the byte deserializer deserializes 8-bit data into 32-bit data. As the parallel data width from the word aligner is quadrupled, the clock rate is divided four times.
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