Suppose we have IG times 16 RAM chips that make up a 32G times64 memory that use
ID: 675065 • Letter: S
Question
Suppose we have IG times 16 RAM chips that make up a 32G times64 memory that uses high interleaving. (Note: This means that each word is 64 bits in size and there are 32 of these words.) How many RAM chips are necessary? Assuming tour chips per bank, how many banks are required? How many lines must go to each chip? How many bits are needed for a memory address, assuming it is word address a For the bits in part d, draw a diagram indicating how many and which bits are used for chip select, and how many and which bits are used for the address on the chip. Redo this problem assuming that low-order interleaving is being used instead.Explanation / Answer
We have 1G X 16 chips.
That is, each chip is 16 bit word addressable.
Thus, we require 4 chips to make a 1G X 64 (i.e., 64 bit word addressable memory)
a)
Therefore, to make 32G X 64 memory, 32X4=128 chips are necessary.
b)
Since, each bank has four 1G X 16 RAM chips; each bank makes 1G X 64 bit memory.