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soln.sample.quiz1

soln.sample.quiz1 - 8-bit Full Adder M(4-bit N(4-bit NOTE...

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CMPT 250 : QUIZ 1 Solutions 1. f(w,x,y,z) = (w + y)(x + z) = wx + wz + xy + yz f’(w,x,y,z) = ((w + y)(x + z))’ = (w + y)’ + (x + z)’ = w’y’ + x’z’ g(w,x,y,z) = (w + y)’ + (x + z)’ + xy = w’y’ + x’z’ + xy. f’ and g require 3 product terms. Personality matrix: PRODUCT INPUTS OUTPUTS | w x y z | f’g ------------------------- w’y’ | 0 - 0 - | 1 1 x’z’ | - 0 - 0 | 1 1 x y | - 1 1 - | 0 1 Use one inverter on the output f’ from the PLA to obtain f . (C) A.H.Dixon page..1

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2. a. gt0 rdy outbus 0 lp dn lm ln st CPS SEQ P (8-bit) N>0 0000 data1(3:0) data2(3:0)
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Unformatted text preview: 8-bit Full Adder M (4-bit) N (4-bit) NOTE: THe algorithm is faulty since P is not initially cleared to 0. The inclusion of a clear control input on P is therefore optional. (C) A.H.Dixon page. .2 b. 2c.) 2b.) Step-action statements for the Control point Selector A2:gt0: lp,dn A2*gt0’: rdy A1*st: lm,ln Flip-ﬂop input functions for implementing the Sequencer D1 = st’*A1 + gt0’*A2 D2 = st*A1 + gt0*A2 Behavioral Model for the Sequencer A2 A1 gt0 st SEQ gt0’ st A2 A1 (C) A.H.Dixon page. .3...
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soln.sample.quiz1 - 8-bit Full Adder M(4-bit N(4-bit NOTE...

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