Xilinx Virtex-6 Libraries Guide for HDL Designs

Chapter 4: About Design ElementsPort Type Width FunctionSYNWORD[6:0] Output 7 The index (0 -> 80) of the 32-bit word in the frame where an ECCerror has been detected. Decoded from SYNDROME. Valid whenECCERRORSINGLE is high.Design Entry MethodInstantiationInferenceCORE Generator and wizardsMacro supportRecommendedNoNoNoAvailable AttributesAttribute Type Allowed_Values Default DescriptionFARSRC String “EFAR”, “FAR” “EFAR” Determines if the output of FAR[23:0] is pointed tothe FAR or EFAR configuration register. Sets configoption register bit CTL0[7].VHDL Instantiation Template-- FRAME_ECC_VIRTEX6: Virtex-6 Configuration Frame Error Detection and Correction Circuitry-- Virtex-6-- Xilinx HDL Libraries Guide, version 11.2FRAME_ECC_VIRTEX6_inst : FRAME_ECC_VIRTEX6generic map (FARSRC => "EFAR")port map (CRCERROR => CRCERROR,ECCERROR => ECCERROR,-- Determines if the output of FAR[23:0] is pointed to the FAR or EFAR configuration-- register. Sets config option register bit REG_TBD[bit].-- 1-bit Readback CRC error.-- 1-bit Frame ECC error found. Value is a one when SYNDROME is-- non-zero and a zero when SYNDROME is all zeroes indicating no errors-- detected.ECCERRORSINGLE => ECCERRORSINGLE, -- 1-bit Indicates single-bit Frame ECC error detected.FAR => FAR,-- 24-bit SEU Correction/Injection and ICAP applications can benefit-- from being able to see the FAR register This output can point to the-- EFAR or FAR configuration register depending on the FARSRC-- attribute.SYNBIT => SYNBIT,SYNDROME => SYNDROME,SYNDROMEVALID => SYNDROMEVALID,SYNWORD => SYNWORD-- 5-bit The index (0 -> 31) of the bit w/ error in the word pointed to-- by SYNWORD in the frame detected. Valid when ECCERRORSINGLE is high.-- 13-bit Frame ECC error where: No errors: All zeros One bit error:-- SYNDROME[11]=0, SYNDROME[10:0]= location of error in FRAME Two bit-- errors: SYNDROME[11]=1, SYNDROME[10:0]=dont care More than two bit-- errors: Unknown output.-- 1-bit Frame ECC output indicating that the value on SYNDROME is-- valid.-- 7-bit The index (0 -> 80) of the 32-bit word in the frame where an-- ECC error has been detected. Decoded from SYNDROME. Valid when-- ECCERRORSINGLE is high.);-- End of FRAME_ECC_VIRTEX6_inst instantiationVirtex-6 Libraries Guide for HDL Designs146 www.xilinx.com UG623 (v 11.4) December 2, 2009