Programmable read-only memory (PROM) is a digital storage device manufactured with all bits set to a default state. A user programs the chip by applying high voltages to blow microscopic internal fuses, permanently setting specific bits. Because the physical structure is altered, the data cannot be erased or overwritten.
We need to burn a new programmable read-only memory chip because the firmware address was off by one byte.
Also heard as
- one-time programmable memory
- OTP
Related terms
PROM
A type of memory chip that is programmed once by blowing internal fuses.
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.
ROM
A class of non-volatile semiconductor storage retains its data without power and is designed primarily for reading rather than writing.