expander.pld

GAL编译工具(Atmel提供)

Name            Expander;
Partno          ;
Revision        01;
Date            8/11/95;
Designer        PLD Expert;
Company         Atmel Corp.;
Location        None;
Assembly        None;
Device          F1500;

/* Example assigning expander terms */

$INCLUDE fit1500.m

EXP(X0);    /* Declare Expander terms */
EXP(X1);    /* Declare Expander terms */
EXP(X2);    /* Declare Expander terms */

pin [24..27] = [I3..0];    /* inputs */

pin [33..34] = [out1..2];  /* outputs */

/* expander nodes */
pinnode = [X0..2];     

/* equations  */

/* Implement SOP using expander terms by DeMorgan's inversion,
   X2 = X0 # X1. */

X0 = (!I1 & I0);
X1 = (!I3 & I2 & !I0);
X2 = (X0 & X1);

out1  =   X2 # !I3 & !I1;
out2  =   X2;