How many address inputs are required to access 256 Bytes memory?a)256b)2c)8d)16Correct answer is option 'C'. Can you explain this answer?

Question

Answer

Memory Organization:
To access memory, we need to provide a unique address to specify the location of the data we want to read or write. The number of address inputs required is determined by the size of the memory.

Calculation:
- 256 bytes of memory can be represented as 2^8 bytes (since 2^8 = 256).
- To address 2^8 locations, we need 8 address lines.
- Each address line can represent 2 different states (0 or 1), hence 2^8 different combinations can be made with 8 lines.
Therefore, 8 address inputs are required to access 256 Bytes memory.

Answer

Concept:

Address line: An address line is basically refers to a physical connection between a CPU/Chipset and memory. They specify which addresses to access in memory. When there are k address lines, then 2k memory word can be accessed.

Data line: Data lines provides the information to be stored in memory. It represents the number of bits in the word.

Calculation:

Here, it is given that memory unit size = 256 bytes

2^k = 256

k = 8

Similar GATE Doubts

Consider a virtual system with 2 level paging 32 bit virtual address is used to support 32 bit physical address, Page size is 4096 byte pages and page table has 4 bytes of page table entry. How many memory accesses are required to read or write a single word.

In an 8085 microprocessor, the number of address lines required to access a 16 K byte memory bank is _________. Correct answer is '14'. Can you explain this answer?

In an 8085 microprocessor, the number of address lines required to access a 16 K byte memory bank is Correct answer is '14'. Can you explain this answer?

Consider a virtual system with 2 level paging 32 bit virtual address is used to support 32 bit physical address, Page size is 4096 byte pages and page table has 4 bytes of page table entry. How many memory accesses required to read or write a single word.

Top Courses for GATE

Suggested Free Tests

Related Content

Mock Test Series

Subject-wise Courses

Other Engg Branches

Related Exams

Company