Every rotation of a motor causes a switch to be pushed. The switch, like most mechanical switches, 'clatters' or bounces when the contacts come together, causing an interval when a single press causes multiple closures. This bouncing can continue for just under 3 milliseconds. The switch is linked into the memory map of a 68000 processor at bit 0 of location $FFFFF000. It is connected so that the bit will read a '1' when the switch is open, and a '0' when closed and not bouncing. The bouncing will cause alternating zeros and ones. For ease of any analysis you do, assume that every instructic takes 1 usec., regardless of addressing mode. If the switch were connected to a falling-edge-sensitive interrupt request line what problem could result during the bouncing? And what is one way the problem might be solved?
Every rotation of a motor causes a switch to be pushed. The switch, like most mechanical switches, 'clatters' or bounces when the contacts come together, causing an interval when a single press causes multiple closures. This bouncing can continue for just under 3 milliseconds. The switch is linked into the memory map of a 68000 processor at bit 0 of location $FFFFF000. It is connected so that the bit will read a '1' when the switch is open, and a '0' when closed and not bouncing. The bouncing will cause alternating zeros and ones. For ease of any analysis you do, assume that every instructic takes 1 usec., regardless of addressing mode. If the switch were connected to a falling-edge-sensitive interrupt request line what problem could result during the bouncing? And what is one way the problem might be solved?
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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![Every rotation of a motor causes a switch to be pushed. The
switch, like most mechanical switches, 'clatters' or bounces
when the contacts come together, causing an interval when a
single press causes multiple closures. This bouncing can
continue for just under 3 milliseconds.
The switch is linked into the memory map of a 68000
processor at bit 0 of location $FFFFF000. It is connected so
that the bit will read a '1' when the switch is open, and a '0'
when closed and not bouncing. The bouncing will cause
alternating zeros and ones.
For ease of any analysis you do, assume that every instruction
takes 1 usec., regardless of addressing mode.
If the switch were connected to a falling-edge-sensitive
interrupt request line what problem could result during the
bouncing? And what is one way the problem might be solved?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8fca6cce-0b18-418a-ac7d-0a3da88931bb%2F48a0933a-9698-4dfb-b39e-70ff5a2f8e45%2Fua6hupj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Every rotation of a motor causes a switch to be pushed. The
switch, like most mechanical switches, 'clatters' or bounces
when the contacts come together, causing an interval when a
single press causes multiple closures. This bouncing can
continue for just under 3 milliseconds.
The switch is linked into the memory map of a 68000
processor at bit 0 of location $FFFFF000. It is connected so
that the bit will read a '1' when the switch is open, and a '0'
when closed and not bouncing. The bouncing will cause
alternating zeros and ones.
For ease of any analysis you do, assume that every instruction
takes 1 usec., regardless of addressing mode.
If the switch were connected to a falling-edge-sensitive
interrupt request line what problem could result during the
bouncing? And what is one way the problem might be solved?
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