Digital Electronics - Microprocessor Fundamentals - Discussion
Discussion Forum : Microprocessor Fundamentals - General Questions (Q.No. 12)
12.
What type of circuit is used at the interface point of an output port?
Discussion:
15 comments Page 1 of 2.
Dharani said:
8 years ago
Latch and flip flop both are 1 bit storage devices. Latch has no clock and clocked latch is called flip flop and with help of clock we can control the States of flip flop.
Subhajit Bhattacharjee said:
9 years ago
"Latch" is needed because, if the MC gets some inputs simultaneously, we need to give some time to process it, instead of using latch if we decoder then at the time of processing many inputs get lost. That is why we are using the latch to hold the exact state while MC process something else.
Kurian Thomas said:
9 years ago
Tristate buffer (>> inverted >> non-inverted >> high impedance) can be used at interfacing.
Thamarai said:
10 years ago
What is the difference between latch and flip flop? Please any body explain.
Raveena said:
10 years ago
Tristate buffer is commonly used to interface input devices and Latch is used to interface output device.
(1)
Sachin said:
1 decade ago
The reason for using the latch in an output port is simple. You do not want to lose the result of any operation. So, in order to not lose it, we use a latch, so that it holds the information as long as new information is overwritten onto it.
Nirupama said:
1 decade ago
Latches can be memory devices, and can store one bit of data for as long as the device is powered. As the name suggests, latches are used to "latch onto" information and hold in place. Latches are very similar to flip-flops, but are not synchronous devices, and do not operate on clock edges as flip-flops do.
Sandie said:
1 decade ago
A microprocessor needs its output head to blink 0 or 1 and more importantly, previous values should not affect the present output value.
Meanwhile, A latch has no feedback;
So Latch is used.
Please correct me if I'm wrong.
Meanwhile, A latch has no feedback;
So Latch is used.
Please correct me if I'm wrong.
Abinash said:
1 decade ago
As latch stores the result by refreshing itself & is transparent while changing the result (o/p) , latch is used @ o/p section.
Bharat said:
1 decade ago
For output latch is used and for inputs buffer is used at interface point.
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