who know what is the problem

who know what is the problem: those four error

C:\copy_project\exemple6\top_ise>map processor_stub.ngd Release 8.1.03i - Map I.27 Copyright (c) 1995-2005 Xilinx, Inc. All rights reserved. Using target part "4vfx12ff668-10". Mapping design into LUTs... ERROR:LIT:248 - CASCADEINA pin of RAMB16 symbol

"top/plb_bram_if_cntlr_1_bram/plb_bram_if_cntlr_1_bram/physical_group_BRAM_Di n_A/ramb16_0" can be sourced only from a CASCADEOUTA of a different RAMB16. Also, the CASCADEOUTA pin on a RAMB16 can source only a single CASCADEINA pin of a different RAMB16. ERROR:LIT:249 - CASCADEINB pin of RAMB16 symbol

"top/plb_bram_if_cntlr_1_bram/plb_bram_if_cntlr_1_bram/physical_group_BRAM_Di n_A/ramb16_0" can be sourced only from a CASCADEOUTB of a different RAMB16. Also, the CASCADEOUTB pin on a RAMB16 can source only a single CASCADEINB pin of a different RAMB16. ERROR:LIT:301 - EMACDCRACK pin of PPC405_ADV symbol top/ppc405_0/ppc405_0/PPC405_ADV_i can be driven only by pin EMACDCRACK of an EMAC. ERROR:LIT:304 - EMACDCRDBUS bus of PPC405_ADV symbol top/ppc405_0/ppc405_0/PPC405_ADV_i can be driven only by bus EMACDCRDBUS of an EMAC. Errors found during logical drc.

thanks advance

Reply to
zhangxun0501
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who know what is the problem: those four error

C:\copy_project\exemple6\top_ise>map processor_stub.ngd Release 8.1.03i - Map I.27 Copyright (c) 1995-2005 Xilinx, Inc. All rights reserved. Using target part "4vfx12ff668-10". Mapping design into LUTs... ERROR:LIT:248 - CASCADEINA pin of RAMB16 symbol

"top/plb_bram_if_cntlr_1_bram/plb_bram_if_cntlr_1_bram/physical_group_BRAM_Di n_A/ramb16_0" can be sourced only from a CASCADEOUTA of a different RAMB16. Also, the CASCADEOUTA pin on a RAMB16 can source only a single CASCADEINA pin of a different RAMB16. ERROR:LIT:249 - CASCADEINB pin of RAMB16 symbol

"top/plb_bram_if_cntlr_1_bram/plb_bram_if_cntlr_1_bram/physical_group_BRAM_Di n_A/ramb16_0" can be sourced only from a CASCADEOUTB of a different RAMB16. Also, the CASCADEOUTB pin on a RAMB16 can source only a single CASCADEINB pin of a different RAMB16. ERROR:LIT:301 - EMACDCRACK pin of PPC405_ADV symbol top/ppc405_0/ppc405_0/PPC405_ADV_i can be driven only by pin EMACDCRACK of an EMAC. ERROR:LIT:304 - EMACDCRDBUS bus of PPC405_ADV symbol top/ppc405_0/ppc405_0/PPC405_ADV_i can be driven only by bus EMACDCRDBUS of an EMAC. Errors found during logical drc.

thanks advance

Reply to
zhangxun0501

read the Virtex4 user's guide chapter on using BRAM. The cascade in/out can only be connected directly to one other BRAM. If you are not using them, leave them open.

Reply to
Ray Andraka

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