218 CHAPTER 5 / FUNCTION MINIMIZATION
POS expression, a conventional (1’s and 0’s) K-map, or a truth table. The cell subfunctions
of the EV K-map become the f
i
coefficients in the CRMT form of Eq. (5.16) or (5.19).
Thus, the entered variables make up the free set. As a caveat, try to avoid bond sets that
generate f coefficients like ···Z(X +Y ) ···, since such coefficients do not produce simple
g coefficients. Note that an EV truth table, such as that in Fig. 8.26, will also suffice for the
purpose of the CRMT minimization method if the table-heading variables are taken as the
bond set variables.
Step 2. For the choice of bond set used, obtain a set of minimum CRMT g
i
coefficients
from Eq. (5.18) or (5.21) by using the EV K-map cell entries as the f
i
coef