From: α∂мιη●●gяєу_ƒєяяу●● <greyferry@gmail.com>
Date: 2011/1/5
Subject: ::::|| VU Askari ||:::: Re: CS302 ASSGNMENT IDEA SOLUTION BY ADMIN BINISH AWAIS --- DONT FORGET TO COMMENT PLZ
To: askarivu@googlegroups.com
Cs302 idea solution by Admin Binish Awais
don't copy juts get the idea
Question_1: [marks: 14]
Solution:
and the corresponding truth table is:
| Truth table for JK flip_flop by admin Binish Awais | |||
| J | K | Qnext | Comment |
| 0 | 0 | Qprev | hold state |
| 0 | 1 | 0 | reset |
| 1 | 0 | 1 | set |
| 1 | 1 | Qprev | toggle |
Question_2: [marks: 6]
Provide to-the-point (max 4 to 5 lines) answer to the following:
§ What is the main difference between a gated S-R latch and an edge-triggered S-R flip-flop?
Solution:
There is no real difference.
1- A latch only uses one output
whereas a flip-flop has two.
2-In a latch one of the inputs
is used as a set.
The second is used as a reset.
3-In a flip-flop the first input sets the first output and resets the
second. The second input resets the first output and sets
the second.
4-A number os flipflops are often used as a part of a (shift)
register. Then both outputs are used and the shift is made
by a clockpulse.
5- A flip-flop (and thus a latch) can be edge triggered or
level-triggered. This depends on the internal structure of
the IC.
Q#no3
Solution:
§ How many flip-flops are required to produce a divide-by-32 device?
Solution:
32=2^5 => 5 bit longNumber divisible is 2*5=10 bit longQuotient & Remainder both are 5 bit eachso total 25 flip-flops at least (+ may be some other auxilliary register also)
Cs302 idea solution by Admin Binish Awais
don't copy juts get the idea
Question_1: [marks: 14]
Solution:
and the corresponding truth table is:
Truth table for JK flip_flop by admin Binish Awais
J
K
Qnext
Comment
0
0
Qprev
hold state
0
1
0
reset
1
0
1
set
1
1
Qprev
toggle
Question_2: [marks: 6]
Provide to-the-point (max 4 to 5 lines) answer to the following:
§ What is the main difference between a gated S-R latch and an edge-triggered S-R flip-flop?
Solution:
There is no real difference.
1- A latch only uses one output
whereas a flip-flop has two.
2-In a latch one of the inputs
is used as a set.
The second is used as a reset.
3-In a flip-flop the first input sets the first output and resets the
second. The second input resets the first output and sets
the second.
4-A number os flipflops are often used as a part of a (shift)
register. Then both outputs are used and the shift is made
by a clockpulse.
5- A flip-flop (and thus a latch) can be edge triggered or
level-triggered. This depends on the internal structure of
the IC.
Q#no3
Solution:
§ How many flip-flops are required to produce a divide-by-32 device?
Solution:
32=2^5 => 5 bit longNumber divisible is 2*5=10 bit longQuotient & Remainder both are 5 bit eachso total 25 flip-flops at least (+ may be some other auxilliary register also)
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