what is the purpose of the following code? CBI DDRB, 4 SBI DDRB, 7 loop: SBIS PINB, 4 JMP next CBI PORTB, 7 JMP loop next: SBI PORTB, 7 JMP loop

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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what is the purpose of the following code?
CBI DDRB, 4
SBI DDRB, 7
loop: SBIS PINB, 4
JMP next
CBI PORTB, 7
JMP loop
next: SBI PORTB, 7
JMP loop
Select one:
O a. we monitor B4 if its HIGH we set B7 and if it is LOW we clear B7
O b. we monitor B7 if its HIGH we clear B4 and if it is LOW we set B4
O c. we monitor B4 if its HIGH we clear B7 and if it is LOW we set B7
O d. we monitor B7 if its HIGH we set B4 and if it is LOW we clear B4
Transcribed Image Text:what is the purpose of the following code? CBI DDRB, 4 SBI DDRB, 7 loop: SBIS PINB, 4 JMP next CBI PORTB, 7 JMP loop next: SBI PORTB, 7 JMP loop Select one: O a. we monitor B4 if its HIGH we set B7 and if it is LOW we clear B7 O b. we monitor B7 if its HIGH we clear B4 and if it is LOW we set B4 O c. we monitor B4 if its HIGH we clear B7 and if it is LOW we set B7 O d. we monitor B7 if its HIGH we set B4 and if it is LOW we clear B4
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