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column mux and memory banks in memories

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vikram789

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memory column mux

why we need Memory Banks in Memories cant we have all the memory under one roof ?

how column mux in implemented in memories ?
 

column mux

if one large memory is used more address decoder could be right to access it

if larger memory is divided into memory banks only few bits is required to enable the bank of memory. no of gates required is reduced for address decoder.

then it speeds up the memory ,like using even memory ,odd memory then lower byte could be stored in bank and higher byte could be stored in other bank during accessing a byte only one bank is enabled ,while accessing word two banks could be enabled ............................
 
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