Memory interfacing

Question

A memory constructed with 2B words and capacity of memory $2^{18}$ bits. Number of decoder required and type of decoder if memory built using $1K\times 4$ RAM chips?

(if possible give some reference and diagram)

Answer 1

16 decoder

Comments

Any reference

from where u got idea?

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 srestha

i am referencing made easy notes.

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No of decoders reqd or no of Ram chips reqd is 64. I mean to realize $2^{18}bits$ we need $64$ number of $1K*4$ RAm chips so there will be 4 chips in a row as word size is 16 bits and each Ram chip can hold 4 bits, so there are 16 rows, 4*16 decoder will do.

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@ abhishekmehta4u

how far I understand with this question

I think

Secondary memory capacity will be $2^{18}$ bits

and 2B word

In your answer, isnot there a bit and Byte conversion problem?

right??

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and also main memory chips are $1K\times 4$

why u remove 4(as 1 cell size) and calculating with only 1K

I couldnot understand that portion

Could u explain a bit?

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@ abhishekmehta4u

plz explain that portion

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 srestha this will help you

 https://gateoverflow.in/15028/isro2014-25

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@abhishekmehta4u

Number of decoder = 1.

And the type of decoder should be $4X16$ decoder.

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yes .. i am updating