Questions 3 (35 points): A random access read/write memory is constructed of fou
ID: 3734953 • Letter: Q
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Questions 3 (35 points): A random access read/write memory is constructed of four 1024 word by 4 bit integrated circuits chips with all address, data, and R/W lines tied in parallel (ie: A0 on Chip O to A0 on Chip 1, to AO on Chip 2, to A0 on Chip 3, etc.). The chip selects lines are separately tied to the outputs of a 2-to-4 decoder which has S1 and SO inputs tied to Address bit A11 and A10 respectively as shown below. 1024x4 RAM 1024x4 RAM DATA ADRS CS 1024x4 RAM DATA ADRS 1024x4 RAM DATA DATA ADRS ADRS CS cs RW R/W A(9.0) A1:10) 2-to-4 Decoder Fill in the blanks below: words x bits The size of RAM isExplanation / Answer
A(9:0) these 10 bit is connected to all chips(0-3).And these chips has 1024 x 4 memory,that means there are 1024 memory cell each of 4 bit.
Now A(11:10) these 2 bit selects chip0 t ochip 3 via decoder.And there are 4 chips each with 1024 memory cell.S,total memory cell available = 4 x 1024 = 4096 = 212 .To address these 212 cells we need 12 bit .And of which most sgnificant 2 bit (11:10) is used for chip select,and (9:0) is used for cell select in each chip.
Answer : 4096 words x 4 bit
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