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ab4's avatar
ab4
Icon for New Contributor rankNew Contributor
7 years ago

I want to design bcd to decimal decoder using structural style. I did it successfully but the problem when I simulate it in Modelsim it does not meet with the truth table.

The truth table: Input (ABCD) Output 0000 =>0111111111 0001 => 1011111111 0010 => 1101111111 0011 => 1110111...
AnandRaj_S_Intel's avatar
AnandRaj_S_Intel
Icon for Regular Contributor rankRegular Contributor
7 years ago

Hi,

Have you implemented 4input NAND gate in entity nandg1?

y<= (a nand b) nand (c nand d);

should be like y<= (a nand b) or (c nand d);

Also check portmap L2.