/* Hexadecimal to seven segment decoder */
Name 7seg.pld ;
PartNo 00 ;
Date 22/07/09 ;
Revision 01 ;
Designer Lee ;
Company None ;
Assembly None ;
Location None ;
Device g16v8as ;
/* Inputs */
Pin 1 = A ; /* 2^0 bit */
Pin 2 = B ; /* 2^1 bit */
Pin 3 = C ; /* 2^2 bit */
Pin 4 = D ; /* 2^3 bit */
/* Outputs - active low */
Pin 18 = !g ;
Pin 17 = !f ;
Pin 16 = !e ;
Pin 15 = !d ;
Pin 14 = !c ;
Pin 13 = !b ;
Pin 12 = !a ;
/* Declarations and intermediate variable definitions */
FIELD input = [ D, C, B, A ] ;
FIELD output = [ a, b, c, d, e, f, g ] ;
/* Logic equations */
TABLE input => output {
0 => 7E ; 1 => 30 ; 2 => 6D ; 3 => 79 ;
4 => 33 ; 5 => 5B ; 6 => 5F ; 7 => 70 ;
8 => 7F ; 9 => 7B ; A => 77 ; B => 1F ;
C => 4E ; D => 3D ; E => 4F ; F => 47 ;
}
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