How many 128x8 bit RAMs are required to design 32 kx 32 bit RAM? (i) 5

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Module 4: Memory Organization

20232m

How many 128x8 bit RAMs are required to design 32 kx 32 bit RAM?
(i) 512
(ii) 128
(iii) 1024
(iv) 32

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Also appeared in 2019.

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Answer: (iii) 1024

Calculation:
Desired: $32K \times 32$ bit
Available: $128 \times 8$ bit

Depth expansion: $32K / 128 = 32768/128 = 256$ rows
Width expansion: $32 / 8 = 4$ chips per row
Total chips: $256 \times 4 = 1024$

Hence 1024 chips required. Same as Q77.

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