Chapter 2 - Common Components
Chapter 2 - Common Components ECE 274A
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This 1 page Class Notes was uploaded by Corina Serna on Friday January 30, 2015. The Class Notes belongs to ECE 274A at University of Arizona taught by Ali Akoglu in Spring2015. Since its upload, it has received 147 views. For similar materials see Digital Logic in ELECTRICAL AND COMPUTER ENGINEERING at University of Arizona.
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Date Created: 01/30/15
Chapter 2 Common Components Section 1 XOR and XNOR gates o XOR gate 2 inputs outputs 1 if input values are different 0 EX y a XOR b is short for y ab a b b HOOSD F OHOO Or tr toPh lt o XNOR gate 2 inputs outputs 1 if input values are the same 0 EX y a XNOR b is short for y a b ab 0 If an XOR has more than 2 inputs the output Will be 1 if input of odds is odd 0 Even parity an extra bit sent to help a receiver detect an erroneous communication Section 2 Universal Gates 0 NAND gate opposite of AND gate outputs 0 if all inputs are 1 P F OOSD r onoo Or tr tr tPh lt 0 Universal gate a single gate type that can implement any combinational circuit 0 ASIC gatearray ASIC Applicationspecified Integrated Circuit 0 NOR gate opposite of an OR gate outputs 0 if any input is equal to 1 Section 3 Muxes o Multiplexor combinational circuit that passes one of multiple data inputs through to a single output and selects one on additional control inputs 0 MuX short for multiplexor 0 Select lines mux s control inputs 0 4X1 mux has 4 data inputs 1 data output and requires to select inputs Section 4 Decodes 0 Decoder converts N inputs to a 1 on one of 2H outputs 0 2X4 decoder converts 2 inputs to a 1 on 1 of 4 outputs 0 Enable input 0 sets of all outputs to 0 and 1 enables the decoder for normal behavior