Addressing relationship for main memory and cache, Computer Engineering

Assignment Help:

Q. Addressing Relationship for Main Memory and Cache?

In the normal case there are 2k words in cache memory and 2n words in main memory. The n-bits memory address is splitted in two fields: k bits for index field and (n - k) bits for tag field. 

Direct mapping cache organization uses n-bit address to access main memory and k-bit index to access cache. Internal organization of the words in cache memory is as displayed in Figure below. Every word in cache comprises the data word and its associated tag. When a new word is first brought in cache the tag bits are stored alongside data bits. When CPU generates a memory request the index field is used for address to access the cache.

545_Addressing Relationship for Main Memory and Cache.png

Figure: Addressing Relationship for Main Memory and Cache

The tag field of CPU address is compared with tag in the word read from cache. If two tags match then there is a hit and desired data word is in cache. If there is not any match there is a miss and required word is read from main memory.


Related Discussions:- Addressing relationship for main memory and cache

Payment, how can get payment

how can get payment

Cloud computing, what is the scope of doing a final year project on cloud c...

what is the scope of doing a final year project on cloud computing?

What are the major functions of io system, What are the major functions of ...

What are the major functions of IO system?  i. Interface to the CPU and memory by the system bus.  ii. Interface to one or more IO devices by tailored data link.

How much volts a CMOS logic device has approximately, The logic 0 level of ...

The logic 0 level of a CMOS logic device is approximately ? Ans. The low level is 0 volts approx in CMOS logic device.

Illustrate does gas have density, Q. Illustrate does gas have density? ...

Q. Illustrate does gas have density? Answer:- Gas in addition to everything in the universe has density though some densities are not either too high or too low to be dete

What is processor time of a program, What is processor time of a program? ...

What is processor time of a program? The periods during which the processor is active is known as processor time of a program it depends on the hardware included in the executi

What is an operating system, What is an operating system?  An operating...

What is an operating system?  An operating system is a program that handles the computer hardware. It acts as an intermediate among users of a computer and the computer hardwar

Define relocatable programs, Relocatable programs? Ans. Relocatable pro...

Relocatable programs? Ans. Relocatable programs can be loaded almost anywhere inside the memory.

What all 1's represents in 32bit ip addressing scheme, In 32bit IP Addressi...

In 32bit IP Addressing scheme all 1's represent? All 1's represent limited broadcast in 32 bit IP Addressing scheme.

Explain direct addressing mode with example, Q. Explain Direct Addressing M...

Q. Explain Direct Addressing Mode with example? Direct Addressing Mode A direct operand signifies to contents of memory at an address referred by the name of the variable.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd