thw_mod3_no4

thw_mod3_no4 - Score: _______ / 30 Your Class No. is the...

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ECE 270 Introduction to Digital System Design Fall 2011 VCC F(C,B,A) D0 4 D1 3 D2 2 D3 1 D4 15 D5 14 D6 13 D7 12 A 11 B 10 C 9 G 7 W 6 Y 5 TakeHomaWork for Module 3 – Due Wednesday, October 5 1. [14 pts] Show how you can implement any arbitrary 3-variable Boolean function using only an 8:1 multiplexer (specifically, a 74x151), an LED, some resistors, and some DIP switches (note that a “closed” switch should be interpreted as a logic “0”, while an “open” switch should be interpreted as a logic “1”). [2 pts] How many different functions of three variables are there? ______________ [12 pts] To implement the function F(C,B,A) = C · A + C · (A B) on the circuit, above, determine which “data” switches should be closed ( work must be shown for full credit ). Circle the input switches that should be closed : D0 D1 D2 D3 D4 D5 D6 D7 Derivation: Name: __________________________________________ Class No: __ __ __ __ - __ Signature: ______________________________________
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Unformatted text preview: Score: _______ / 30 Your Class No. is the last four digits of your PUID followed by the first character of your last name. ECE 270 Introduction to Digital System Design Fall 2011 2. [16 pts] ABEL Review Questions: (a) A0 , A1 , A2 , A3 defined as the set ALL : (b) B0 , B1 , B2 , B3 , B4 used as a range: (c) GE used as the tri-state enable for output signals G0 , G1 , G2 , G3 : (d) Write using ABEL syntax: G(W,X,Y,Z) = (X Z)(W Y) (e) Write using ABEL syntax: F(W,X,Y,Z) = W Z(X + Y ) + Y(X + W + Z) (f) ABEL declaration that specifies input variables SA , SB , and SC are active low : (g) ABEL declaration that specifies variables R0 , R1 , R2 , and R3 are active low combinational outputs: (h) ABEL equation statement specifying that the tri-state enable for combinational output signals R0 , R1 , R2 , and R3 is given by the expression AB C:...
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thw_mod3_no4 - Score: _______ / 30 Your Class No. is the...

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