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100G Reed-Solomon Codec for Ethernet IEEE 802.3 Clause 91 (803.3bj)
The RS100-160 core implements the codec for the Forward Error Correction (FEC) cyclic code RS(528, 514, 7,10) used in the IEEE 802.3bj (100G Backplane Ethernet) standard draft for 100GBASE-CR4 and 100GBASE-KR4 PHY. The encoder and decoder functions are completely independent and packaged as two sub-cores, RS100-160E and RS100-160D respectively. Decoder corrects up to 7 word errors; an option supporting RS(544, 514) for 100GBASE-KP4 PHY (correcting up to 15 errors) is also available .
The RS100-160E core implements the FEC encoder per section 91.4.2.9 of the IEEE 802.3bj draft standard. The core accepts sixteen 10-bit words (160 bit total) on every clock and outputs the encoded result 3 clocks later.
The RS100-160D core implements the FEC decoder per section 91.4.3.3 of the IEEE 802.3bj standard. It accepts sixteen 10-bit words (198 bit total) on every clock and outputs the decoded result 49 clocks later.
The RS100-160E core implements the FEC encoder per section 91.4.2.9 of the IEEE 802.3bj draft standard. The core accepts sixteen 10-bit words (160 bit total) on every clock and outputs the encoded result 3 clocks later.
The RS100-160D core implements the FEC decoder per section 91.4.3.3 of the IEEE 802.3bj standard. It accepts sixteen 10-bit words (198 bit total) on every clock and outputs the decoded result 49 clocks later.
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