Skip to main content

Important Digital Logic and Design Short Questions

Chapter: 20
Question 1:
What is the purpose of the OLMC in the GAL22V10?
Answer: The OLMC in the GAL22V10 handles input/output operations and can be programmed for different output modes.
Chapter: 20
Question 2:
What are the four OLMC configurations in a GAL?
Answer: The four OLMC configurations are Combinational Mode with active-low output, Combinational Mode with active-high output, Registered Mode with active-low output, and Registered Mode with active-high output.
Chapter: 20
Question 3:
What happens when the control input to a tri-state buffer is set to low?
Answer: When set to low, the tri-state buffer disconnects the output, setting it to high impedance.
Chapter: 20
Question 4:
How is a Boolean expression represented in ABEL?
Answer: In ABEL, a Boolean expression like F = AB + AC + BD is written as F = A & !B # A & C # !B & !D;.
Chapter: 21
Question 5:
What is the GAL16V8 device used for?
Answer: The GAL16V8 is used in programmable logic devices, capable of emulating most PALs through simple, complex, and registered modes.
Chapter: 21
Question 6:
How many inputs and outputs does the GAL16V8 have?
Answer: The GAL16V8 has eight inputs, two special function input pins, and eight pins that can be used as inputs or outputs.
Chapter: 21
Question 7:
What is the purpose of the OLMC in GAL16V8?
Answer: The OLMC in GAL16V8 manages the output logic, controlling feedback and implementing both combinational and sequential logic.
Chapter: 21
Question 8:
What are the three modes in which PALs can be programmed in GAL16V8?
Answer: The three modes are Simple, Complex, and Registered, associated with Combinational and Sequential Logic.
Chapter: 21
Question 9:
How is the tri-state buffer in the OLMC controlled?
Answer: The tri-state buffer can be controlled by connecting it to Vcc, GND, an external pin, or the output of an AND gate.
Chapter: 21
Question 10:
What does the feedback signal line in OLMC allow?
Answer: It allows the output of the OLMC to be fed back into the AND gate array, facilitating the implementation of sequential logic circuits.