Programmable Read-Only Memory
(PROM) A kind of {ROM} which can be written using a
PROM programmer. The contents of each bit is determined by a
{fuse} or {antifuse}. The memory can be programmed once after
manufacturing by "blowing" the fuses, which is an irreversible
process. Blowing a fuse opens a connection while blowing an
antifuse closes a connection (hence the name). Programming is
done by applying high-voltage pulses which are not encountered
during normal operation.
(1995-04-22)