Difference between ROM and PROM

 ROM refere to memroy chip storing permanent data and instruction, While in PROM is a type of read only memory. It is a type of memory which can only be modified once not again and again. So here this article gives the main key difference between ROM and PROM to better understand this topic.

Definition of ROM

ROM Stand for read-only memory, ROM computer memory in which program instruction, operating procedures, or other data are permanently stored, generally on electronic chips during manufacture, and the ordinarily cannot be changed by the user.

Definition of PROM

PROM stands for programmable read-only memory. It is a computer memory chip, and it is possible to program it once after creation. After programming the PROM, the information we can write to becomes permanent. Therefore, we cannot erase or delete that written data. The PROM chip was commonly used in earlier computer BIOS systems.

Difference between ROM ad PROM:

  • ROM stands for read-only memory, While PROM stands for programmable read-only memory.
  • ROM refers to a memory chip storing permanent data and instruction, while in PROM is the type of read-only memory. It is a type of memory that can only be modified once not again and again.
  • ROM cannot be erased or written too. Memory chips that are programmed in factories for large run production.  PROM is programmed only once by blown of internal fuses permanenly and is also called field programmble ROM and is progemmed by using a ROM programmer in the lab or onsite.
  • ROM is onvolatile, which means it contents are not lost when power is removed from the computer. Most of the ROM chips are designed to be modified so, there are less chance of any type of error. User can modify it by using EPROM and EEPROM.

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