Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Which of the following combination is the bes...
Start Learning for Free
Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?
- a)EX0=1
- b)EA=1
- c)any of the mentioned
- d)both of the mentioned
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Which of the following combination is the best to enable the external ...
For executing the EX0 interrupt, the EX0 and EA bits of the IE register should be set. EA is set to enable all the interrupts and EX0 is set to enable the external hardware interrupt 0 interrupt and mask the other enabled interrupts.
Most Upvoted Answer
Which of the following combination is the best to enable the external ...
The correct answer is option 'D', which means that both options 'a' and 'b' are required to enable the external hardware interrupt 0 of the IE register.
Explanation:
To understand why both options 'a' and 'b' are required, let's first understand the IE register and its bits:
The IE (Interrupt Enable) register is a special register in a microcontroller or microprocessor that is used to enable or disable interrupts. It typically contains several bits, each corresponding to a specific interrupt source. In this case, we are interested in enabling the external hardware interrupt 0.
The external hardware interrupt 0, also known as INT0, is a hardware interrupt input pin that can trigger an interrupt when its state changes from high to low. It is commonly used to handle external events or signals.
Now, let's analyze each option:
a) EX0=1:
The EX0 bit is a bit in the IE register that is specifically associated with the external hardware interrupt 0. Setting this bit to 1 enables the external hardware interrupt 0. However, this alone is not enough to enable the interrupt. It only enables the interrupt source but doesn't globally enable all interrupts.
b) EA=1:
The EA bit is another bit in the IE register that stands for "Enable All Interrupts". Setting this bit to 1 globally enables all interrupts. This means that even if EX0 is set to 1, the external hardware interrupt 0 will not be recognized unless EA is also set to 1.
Combining options 'a' and 'b':
To enable the external hardware interrupt 0, we need to set both the EX0 and EA bits to 1. This allows the microcontroller or microprocessor to recognize the interrupt signal on the INT0 pin and handle it accordingly.
Therefore, the correct combination to enable the external hardware interrupt 0 is to set both the EX0 and EA bits to 1.
Explanation:
To understand why both options 'a' and 'b' are required, let's first understand the IE register and its bits:
The IE (Interrupt Enable) register is a special register in a microcontroller or microprocessor that is used to enable or disable interrupts. It typically contains several bits, each corresponding to a specific interrupt source. In this case, we are interested in enabling the external hardware interrupt 0.
The external hardware interrupt 0, also known as INT0, is a hardware interrupt input pin that can trigger an interrupt when its state changes from high to low. It is commonly used to handle external events or signals.
Now, let's analyze each option:
a) EX0=1:
The EX0 bit is a bit in the IE register that is specifically associated with the external hardware interrupt 0. Setting this bit to 1 enables the external hardware interrupt 0. However, this alone is not enough to enable the interrupt. It only enables the interrupt source but doesn't globally enable all interrupts.
b) EA=1:
The EA bit is another bit in the IE register that stands for "Enable All Interrupts". Setting this bit to 1 globally enables all interrupts. This means that even if EX0 is set to 1, the external hardware interrupt 0 will not be recognized unless EA is also set to 1.
Combining options 'a' and 'b':
To enable the external hardware interrupt 0, we need to set both the EX0 and EA bits to 1. This allows the microcontroller or microprocessor to recognize the interrupt signal on the INT0 pin and handle it accordingly.
Therefore, the correct combination to enable the external hardware interrupt 0 is to set both the EX0 and EA bits to 1.
Attention Computer Science Engineering (CSE) Students!
To make sure you are not studying endlessly, EduRev has designed Computer Science Engineering (CSE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Computer Science Engineering (CSE).
|
Explore Courses for Computer Science Engineering (CSE) exam
|
|
Top Courses for Computer Science Engineering (CSE)View all
Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer?
Question Description
Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer?.
Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE).
Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free.
Here you can find the meaning of Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?a)EX0=1b)EA=1c)any of the mentionedd)both of the mentionedCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests.
|
|
Explore Courses for Computer Science Engineering (CSE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup