scs8ls/V0.1.1/verilog/scs8ls_pg_U_DFB.v

primitive scs8ls_pg_U_DFB(Q, S, R, CK, D);
output Q;
input  S, R, CK, D;
reg    Q;
  table
    1  0   ?    ?  :  ?  :  1; // Asserting preset
    *  0   ?    ?  :  1  :  1; // Changing preset
    ?  1   ?    ?  :  ?  :  0; // Asserting reset (dominates preset)
    0  *   ?    ?  :  0  :  0; // Changing reset
    0  ?   (01) 0  :  ?  :  0; // rising clock
    ?  0   (01) 1  :  ?  :  1; // rising clock 
    0  ?   p    0  :  0  :  0; // potential rising clock
    ?  0   p    1  :  1  :  1; // potential rising clock
    0  0   n    ?  :  ?  :  -; // Clock falling register output does not change
    0  0   ?    *  :  ?  :  -; // Changing Data
 
  endtable
endprimitive
// bnb mar4,2003 - this is a modification of the verplex FF udp
// that was edited to work with tetramax and compiles
// with verilog-xl with no warnings