
3.10 Digital Systems: Principles and Design
3. From a map for SOP, for a map of the POS maxterms, we just consider a
dot (AND) sign operation replaced with the + (OR) sign and each variable
A, B, C and D just replaced by their respective complements. Also instead
of placing 1s, we place 0s in POS Karnaugh maps.
3.3 FIVE AND SIX VARIABLE KARNAUGH MAPS
AND TABLES
When the number of variables are five, we can make two maps, each with four vari-
ables, B, C, D and E with fifth variable A = 0 and A = 1, respectively. One map is
considered as a upper layer map and other is considered as a lower layer map, when
performing the minimization from the cell ...