Scribd
Upload
2K views1 page

Types of ROM: ROM Read Only Memory

There are four main types of ROM: ROM, which is programmed during manufacturing and cannot be changed; PROM, which is similar to ROM but can be programmed by the user and then cannot be erased or rewritten; EPROM, which can be erased by exposing it to UV light to allow rewriting; and EEPROM, which can be electrically erased and rewritten independently without needing UV light.

Uploaded by

krissh20
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
2K views1 page

Types of ROM: ROM Read Only Memory

There are four main types of ROM: ROM, which is programmed during manufacturing and cannot be changed; PROM, which is similar to ROM but can be programmed by the user and then cannot be erased or rewritten; EPROM, which can be erased by exposing it to UV light to allow rewriting; and EEPROM, which can be electrically erased and rewritten independently without needing UV light.

Uploaded by

krissh20
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
You are on page 1/ 1

Types of ROM

It is programmed during the


ROM READ ONLY MEMORY manufacturing process . The
information once written on it
cannot be changed .

It is similar to ROM . The only


PROM PROGRAMMABLE READ ONLY difference is that it is
MEMORY manufactured as a blank chip .
User can get a blank PROM
chip and program it using a
PROM programmer or PROM
burner .But once written , it
cannot be erased or rewritten.

It has an additional feature


EPROM ERASABLE PROGRAMMABLE where data once written can
ROM be erased or re-written by
exposing to strong UV light. It
is time consuming.

Can be independently read ,


EEPROM ELECTRICALLY ERASABLE erased and re-written
PROM electronically ; no need of UV
light.

You might also like