Question

A microprocessor is designed to access 2 k ROM, 4 k PROM and 64 k RAM. The number of address lines required to access these memories by the μP is
1. 16
2. 17
3. 18
4. 19

Answer 1

Correct Answer - Option 1 : 16

To access a memory of 2ⁿ RAM i.e. to address 2ⁿ memory locations, the address line required are n.

Given that a microprocessor is designed to access 2 k ROM, 4 k PROM and 64 k RAM.

Maximum memory is 64 k RAM.

To address 64 k RAM i.e. 2⁶ × 2¹⁰ = 2¹⁶ memory locations, the address lines required are 16.