Exam2sp11

# Exam2sp11 - CompE 270 Digital Systems Exam #2 - use...

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CompE 270 Digital Systems Sp11 NAME:____________________ Exam #2 - use additional sheets if needed -- SHOW WORK for partial credit Exam2sp11.doc 1 1) The diagrams below show Mealy and Moore state machines. Identify which type, and the maximum number of states each could implement if each has 5 FFs. 10 pts Binary state encoding: One-hot state encoding: Circle Type: Mealy / Moore Type: Mealy / Moore Maximum # states: _____ Maximum # states: _____ 2) Fill in the rest of the truth table for a 2 to 4 line decoder: 15 pts Inputs: out out out Out Enable In1 In0 Y3 Y2 Y1 Y0 0 X X 1 1 1 1 1 0 0 1 1 1 0 1 0 1 1 1 0 1 1 1 3) Fill in the table for Q+. Is it rising(+) or falling(-) edge triggered? 10 pts Circle one: Rising edge Or Falling edge Q- D Clk Q+ 0 0 0 or 1 0 0 edge 0 1 0 or 1 0 1 edge 1 0 0 or 1 1 0 edge 1 1 0 or 1 1 1 edge

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CompE 270 NAME:____________ ____ Exam 2 Exam2sp11.doc 2 4) Design an up/down BCD counter Mealy Machine with carry/borrow output. The counter must have a carry and borrow output to
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## This note was uploaded on 02/26/2012 for the course COMPE 270 taught by Professor Harris during the Spring '08 term at San Diego State.

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Exam2sp11 - CompE 270 Digital Systems Exam #2 - use...

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