PROM stands for programmable read-only memory. It is a type of non-volatile memory that ships blank and is programmed by the user with a specialized device that applies high voltage to permanently destroy specific internal connections. Engineers use PROMs for low-volume firmware storage or configuration data where mass-producing a custom mask ROM is too expensive.
Grab the programmer and burn this hex file to a fresh PROM for the prototype board.
Also heard as
- programmable read-only memory
Do not mix it up with
- ROM: ROM is programmed at the silicon foundry during manufacturing, whereas PROM is programmed by the user after manufacturing.
Related terms
ROM
A class of non-volatile semiconductor storage retains its data without power and is designed primarily for reading rather than writing.
EPROM
An erasable programmable read-only memory is a non-volatile chip that can be wiped with ultraviolet light.
EEPROM
Electrically erasable programmable read-only memory is a non-volatile storage chip.
Write once, read many
A data storage paradigm where information is permanently recorded and cannot be modified.