power | A₄A₃A₂A₀ | B4 to NAND | B3 to NAND | B2 to NAND | B1 to NAND | PB1
B4'*PB1 | B3'*PB1 | B2'*PB1 | B1'*PB1
B4*PB1' | B3*PB1' | B2*PB1' | B1*PB1'
B4 to adder | B3 to adder | B2 to adder | B1 to adder | Sums |