Intel® Arria® 10 Transceiver PHY User Guide

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ID 683617
Date 3/28/2022
Public
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2.6.1.3. 8B/10B Decoding for GbE, GbE with IEEE 1588v2

The 8B/10B decoder takes a 10-bit encoded value as input and produces an 8-bit data value and 1-bit control value as output.
Figure 47. Decoding for GbEDx.y(0x8d), Dx.y(0xa4), K28.5(0xbc), and Dx.y(0x50) are received at rx_parallel_data. /K28.5/ is set as the word alignment pattern. rx_patterndetect goes high whenever it detects /K28.5/(0xbc). rx_datak is high when bc is received, indicating that the decoded word is a control word. Otherwise, rx_datak is low. rx_runningdisp is high for 0x8d, indicating that the decoded word has negative disparity and 0xa4 has positive disparity.


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