This computer has a block of 32?bit?wide 512 KB of memory built using 64 Kbit static RAM chips that are each 4 bits wide. How many RAM chips are required to implement the memory?
What will be an ideal response?
It takes 32/4 = eight 4?bit?wide chips to span the 32?bit data bus. Each memory chip provides 64K/32 = 2K words. A set of eight chips provides 8 × 2K = 16K words of data. We need 512K/4 = 128K words of storage. This requires 128K/16K = 8 banks of memory; that is 8 × 8 = 64 chips.
We could have proceeded by saying that we have 512 Kbytes of memory space (222 bits) and a chip provides 64 Kbits (216 bits). The number of chips is 222/216 = 26 = 64.
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