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2. Build the circuit shown below. The Data and Control inputs shown are connected back to input switches on the trainer. The output is connected to a LED. Design the control circuit using other logic gates to "address" the control lines on the Tri-state buffers.

2. Build the circuit shown below. The Data and Control inputs shown are connected back to input switches on the trainer. The output is connected to a LED. Design the control circuit using other logic gates to "address" the control lines on the Tri-state buffers.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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1. Design a bus control circuit similar to the multiplexer where 4 inputs can use the same output line. We wish to design the circuit so that only one input at any given time has access to the output. To do this we can design a decoder circuit to control the tri-state buffers on each input line. If we are using 74126's, this means that at any one time the input to 3 of the tri-state buffers must be LOW to shut down those gates, and one buffer must be HIGH to allow the input to pass to the output. If we use 74125's then we must reverse these conditions. 2. Build the circuit shown below. The Data and Control inputs shown are connected back to input switches on the trainer. The output is connected to a LED. Design the control circuit using other logic gates to "address" the control lines on the Tri-state buffers. Control 1 Control 2 LED Output Data 1 Data 2 Data 3 Data 4
Transcribed Image Text:1. Design a bus control circuit similar to the multiplexer where 4 inputs can use the same output line. We wish to design the circuit so that only one input at any given time has access to the output. To do this we can design a decoder circuit to control the tri-state buffers on each input line. If we are using 74126's, this means that at any one time the input to 3 of the tri-state buffers must be LOW to shut down those gates, and one buffer must be HIGH to allow the input to pass to the output. If we use 74125's then we must reverse these conditions. 2. Build the circuit shown below. The Data and Control inputs shown are connected back to input switches on the trainer. The output is connected to a LED. Design the control circuit using other logic gates to "address" the control lines on the Tri-state buffers. Control 1 Control 2 LED Output Data 1 Data 2 Data 3 Data 4
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