Xilinx RocketIO User Manual
Also see for RocketIO: User guideUser guideUser guide
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Contents
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UG024 (v1.5) October 16, 2002 www.xilinx.com 61RocketIO™ Transceiver User Guide 1-800-255-7778Status Signals RStatus SignalsWhether the 8B/10B encoding is enabled or disabled, there are several status signals forerror indication. If an invalid K-character is sent to the transceiver, the TXKERR transitionsHigh. This can produce several receive errors. These receive errors are RXNOTINTABLE orRUNDISPERR. RUNDISPERR transitions High if the incorrect disparity is received.RXNOTINTABLE determines if the incoming character is a valid character. These signalsare meant to detect errors in the transmission data from incorrect framing. The CRCOperation section covers transmission data error detection caused by noise.8B/10B Encoding8B/10B encoding includes a set of Data characters and K-characters. Eight-bit values arecoded into 10-bit values keeping the serial line DC balanced. K-characters are special Datacharacters designated with a CHARISK. K-characters are used for specific informativedesignations. Table 3-13 and Table 3-14 show the Data and K tables of valid characters.Table 3-13: Valid Data CharactersData ByteNameBitsHGF EDCBACurrent RD –abcdei fghjCurrent RD +abcdei fghjD0.0 000 00000 100111 0100 011000 1011D1.0 000 00001 011101 0100 100010 1011D2.0 000 00010 101101 0100 010010 1011D3.0 000 00011 110001 1011 110001 0100D4.0 000 00100 110101 0100 001010 1011D5.0 000 00101 101001 1011 101011 0100D6.0 000 00110 011001 1011 011001 0100D7.0 000 00111 111000 1011 000111 0100D8.0 000 01000 111001 0100 000110 1011D9.0 000 01001 100101 1011 100101 0100D10.0 000 01010 010101 1011 010101 0100D11.0 000 01011 110100 1011 110100 0100D12.0 000 01100 001101 1011 001101 0100D13.0 000 01101 101100 1011 101100 0100D14.0 000 01110 011100 1011 011100 0100D15.0 000 01111 010111 0100 101000 1011D16.0 000 10000 011011 0100 100100 1011D17.0 000 10001 100011 1011 100011 0100D18.0 000 10010 010011 1011 010011 0100D19.0 000 10011 110010 1011 110010 0100D20.0 000 10100 001011 1011 001011 0100D21.0 000 10101 101010 1011 101010 0100 |
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