Question

Course: Computer Architecture
Theme: Internal Memory

What are the differences among EPROM, EEPROM? What is a DDR SDRAM? How does an SDRAM differ from a DRAM? What is burst mode? What do you understand by interleaved memory?

Answer 1

Difference between EPROM and EEPROM

EPROM

*It is called as Erasable programmable read only memory

*Here uv lights are used to erase the content

*EPROM is modern version of PROM

*Here relative size of cell is one

EEPROM

*It is called as Electrically erasable programmable read only memory.

*Here electrical signals are used to erasr EEPROM content

*EEPROM is modern version of EPROM

* Relative size of cell in EEPROM is 3

*DDR SDRAM

It is known as Double Data Rate synchronous Dynamic Random Access Memory is a synchronous dyanamic ram which will allow high transfer rates and high Performance

It is a combination of integrated circuit which are volatile in memory

difference between SDRAM and DRAM

SDRAM

*​​​​​​It is known as synchronous Dynamic Random Access Memory

*It has lower access time

*It is faster compared to DRAM

*It is costlier than DRAM

*It has low packaging density

DRAM

*It is known as Dynamic Random Access Memory

*it has more access time comparitively

*It is slower than SRAM

*It is low cost

*It has high packaging density

burst mode

Burst mode is a data transmission mode in which data transfer is faster than the usual.it is a mode in which device is transferred data repeatedly without undergoing the steps or procedure required to transmit the data in seperate transaction

Interleaved memory

Interleaved memory is in which main memory is divided into sections ,so cpu can access alternative sections without waiting for memory catch up

*It is mainly for compensating for the relative slow speed of DRAM