hsabaghianb @ kashanu.ac.ir Microprocessors 1-25
Masked ROM or just ROM
PROM or programmable ROM(once only)
EPROM (erasable via ltraiolet light)
Flash (can be erased and re-written about 10000 times, usually must write a whole block not just 1 byte or 2 bytes, slow writing, fast reading)
EEPROM (electrically erasable read-only memory, also known as EEROM—both reading and writing are very slow but can program millions of times…useless for storing a program but good for say configuration information.