Explain read-only memory, Electrical Engineering

Assignment Help:

Q. Explain Read-only memory?

ROM is nonvolatile (because it maintains its contents even when its power is shut off) and is used to store data and programs that do not change during the operation of the system. The mask-programmed ROMs are read-only devices that are programmed for data storage during the manufacturing of the chip itself. These are generally less expensive devices for mass production. Character-font memory for laser printers is a good example. Programmable read-only memory (PROM) is a field-programmable memory that is fabricated by the manufacturer containing all 0s and is programmed irreversibly by the user by electrically changing appropriate 0s to 1s. PROMs are quite economical in small quantities. Erasable programmable read-only memory (EPROM) is nonvolatile and widely used in microprocessor systems for program storage. It can be erased by shining an ultraviolet light and reprogrammed if necessary. These are produced in lowtomoderate volumes.


Related Discussions:- Explain read-only memory

Calculate the bandwidth of the new signal, A signal comprises a bandwidth o...

A signal comprises a bandwidth of 1kHz centred around 1kHz.  A sine wave along with a frequency of 1250Hz is added to the signal. The bandwidth of the new signal is: 2250Hz

Ac voltage controllers, Q. Explain AC voltage controllers? Common appli...

Q. Explain AC voltage controllers? Common applications for these controllers are found in fan, pump, and crane drives. Figure shows three-phase symmetrical ac voltage-controlle

Determine the mechanism of generation of the voltage, (a) Identify the semi...

(a) Identify the semiconductor type in the above diagram. (b) Explain the mechanism of generation of the voltage V AB in the above diagram. (c) An experimental setup like th

Evaluate the thickness of the shell plate, A cylindrical shell with flat en...

A cylindrical shell with flat ends is of 1.5 m Internal diameter and 4 m length. It is subjected to an internal pressure of 300 N/cm 2 . The principal stress is not to exceed 15 K

Peak inverse voltage - thyristor, Peak inverse Voltage   Peak  inverse v...

Peak inverse Voltage   Peak  inverse voltage is   important parameter in the design of rectifier circuit. PIV is the maximum  voltage that appears across the device  during its

Dc machiunes, 1,Operation of face plate starter 2;Operation of a shaded pol...

1,Operation of face plate starter 2;Operation of a shaded pole motor 3,3 explained demerits of a rheostat method of starting adc machines

Determine the magnetic flux, Determine the magnetic flux: A coil is wo...

Determine the magnetic flux: A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, with a mean circumference of 40mm and cross-sectional are

How many machine cycles does 8085 have, How many machine cycles does 8085 h...

How many machine cycles does 8085 have, mention them The 8085 have seven machine cycles. They are Opcode fetch Memory read Memory write I/O read I/O

How many interrupts does 8085 have, How many interrupts does 8085 have, men...

How many interrupts does 8085 have, mention them The 8085 has 5 interrupt signals; they are INTR, RST7.5, RST6.5, RST5.5 and TRAP

Multiprocessing - many processors many users many programs , Multiprocessin...

Multiprocessing - Many Processors Many users Many Programs  Multiprocessing or also  called  distributed processing system  provides solution to problems of above  timesharing

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