2 votes 2 votes 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) CO and Architecture co-and-architecture memory-interfacing memory-management + – srestha asked Mar 24, 2018 srestha 1.2k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 1 votes 1 votes 16 decoder abhishekmehta4u answered Mar 24, 2018 • selected Mar 24, 2018 by srestha abhishekmehta4u comment Share Follow See all 9 Comments See all 9 9 Comments reply srestha commented Mar 24, 2018 reply Follow Share Any reference from where u got idea? 0 votes 0 votes abhishekmehta4u commented Mar 24, 2018 reply Follow Share srestha i am referencing made easy notes. 0 votes 0 votes Sukannya commented Mar 24, 2018 i edited by Sukannya Mar 24, 2018 reply Follow Share 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. 0 votes 0 votes srestha commented Mar 24, 2018 reply Follow Share @ 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?? 0 votes 0 votes srestha commented Mar 24, 2018 reply Follow Share 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? 0 votes 0 votes srestha commented Mar 24, 2018 reply Follow Share @ abhishekmehta4u plz explain that portion 0 votes 0 votes abhishekmehta4u commented Mar 24, 2018 reply Follow Share srestha this will help you https://gateoverflow.in/15028/isro2014-25 0 votes 0 votes Jason commented Mar 24, 2018 reply Follow Share @abhishekmehta4u Number of decoder = 1. And the type of decoder should be $4X16$ decoder. 0 votes 0 votes abhishekmehta4u commented Mar 24, 2018 reply Follow Share yes .. i am updating 0 votes 0 votes Please log in or register to add a comment.