A programmable read-only memory (PROM) or field programmable read-only memory (FPROM) or one-time programmable non-volatile memory (OTP NVM) is a form of digital memory where the setting of each bit is locked by a fuse or antifuse. Such PROMs are used to store programs permanently. The key difference from a strict ROM is that the programming is applied after the device is constructed.
PROMs are manufactured blank and, depending on the technology, can be programmed at wafer, final test, or in system. The availability of this technology allows companies to keep a supply of blank PROMs in stock, and program them at the last minute to avoid large volume commitment. These types of memories are frequently seen in video game consoles, mobile phones, radio-frequency identification (RFID) tags, implantable medical devices, high-definition multimedia interfaces (HDMI) and in many other consumer and automotive electronics products.
Read more about Programmable Read-only Memory: History, Programming
Famous quotes containing the word memory:
“I regard a love for poetry as one of the most needful and helpful elements in the life- outfit of a human being. It was the greatest of blessings to me, in the long days of toil to which I was shut in much earlier than most young girls are, that the poetry I held in my memory breathed its enchanted atmosphere through me and around me, and touched even dull drudgery with its sunshine.”
—Lucy Larcom (1824–1893)