Question

A RAM has 1M rows each having 16 cells: (i) How many data input and data output lines does this RAM needs? Explain your answer. (ii) What is the capacity of RAM in bytes. (iii) How many address lines are needed for this RAM? Give reason in support of your answer.

Answer 1

Address Lines:

Assuming that number of address lines (address bits) is n, how can we find n? If n=1, you can only address 2 locations (0 and 1). If n=2, you can address 4 locations (0, 1, 2, and 3). As you can see, number of addressable locations = 2^n.

Given that number of addressable locations = 1024, then 1024=2^n

This means that n=log(1024) to the base 2.

Thus, n=10.