Question

Difference between encoder and priority encoder

Answer 1

An ordinary encoder has a number of input lines but only one of them is activated at a given time.

A priority encoder can have more than one input activated at the same time.

Answer 2

Difference between encoder and priority encoder:

Encoder:

• A combination of the circuit which performs the decoder’s reverse operation is known as an encoder.
• It has a maximum input line and ‘n’.
• It will produce a binary code equal to the input.

Priority encoder:

• At a one-time priority encoder which takes all of their inputs and converts all of them into an equal binary code at its output.
• In short, it is mentioned as P-encoder.
• It is also available in standard IC form.
• It provides n bits of binary code output.

What is the purpose of priority encoder?

• The output of a priority encoder is the binary representation of the index of the most significant activated line, starting from zero.
• They are often used to control interrupt requests by acting on the highest priority interrupt input.

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