Given a 256MB RAM a How many address bits are required if th

Given a 256MB RAM.

a. How many address bits are required if the memory is byte addressable?

b. What’s the capacity of the RAM in 32-bit words?

c. How many bits are needed for word addresses?

d. How many 256Mx1 chips would be needed to build the RAM?

e. How many 16M x 4 chips?

Repeat for 16GB RAM as well

Answer:

(a) 28 bits

size = 256MB i.e 2^28 hence 28 bits

b) 8GB

capacity = 32*256MB=8GB

c) 28

since RAM is 256 MB which is 2^28 hence 28 bits to address.