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Altera_Forum
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16 years ago

Mm74hc154 Fpga

hi friends im doing a project on MM74HC154 FPGA 4-to-16 line decoder i need some ideas and informations... waiting for your replies shimaz
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Altera_Forum
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16 years ago

@shimaz

This looks like an initial course assignment...

--- Quote Start ---

im doing a project on MM74HC154 FPGA 4-to-16 line decoder

--- Quote End ---

You can specify this as a schematic, VHDL or Verilog. Here is (one of the many possible) way(s) how you can do this in Verilog... 

 
module MM74HC154(a, b, c, d, g1, g2, out);
  input a, b, c, d, g1, g2;
  output reg  out;
  integer i;
  always @(a, b, c, d, g1, g2)
  if (g1 || g2)
    out = 16'bzzzzzzzzzzzzzzzz;
  else 
    for (i = 0; i < 16; i = i + 1)
      out = ({d, c, b, a} == i) ? 1'b0 : 1'b1;
endmodule

Have fun learing FPGA design.