Many articles have introduced that the mobile phone's running memory is called RAM, and the body memory (storage memory) is called ROM. It can be said that ROM is a misrepresentation, and the root cause is wrong.
RAM (Random Access Memory, Random Access Memory ) It runs fast, but it cannot keep the data in it in the event of a power failure. In the early days, it was the main component of the cache and the current memory stick.
ROM (Read Only Memory), as the name implies, the early read-only memory was written once, and only data can be read later. Can store data for a long time.
Later, everyone felt that it was inconvenient that ROM could not be written multiple times, so they made
EPROM (erasable programmable read-only memory) this strange thing, which can be written multiple times, Wipe out requires ultraviolet radiation.
EEPROM (Electrically Erasable Programmable Read-Only Memory) This strange and convenient thing can be written many times and modified by programming voltage.
later developed flash memory ( Flash Memory ) based on EEPROM. Early mobile phones used flash memory as persistent storage. It may be the reason why many of us now call the storage memory of mobile phones ROM.
In fact, the flash memory is NVRAM (non-volatile random access memory) in a strict sense.
But you may be accustomed to call the mobile phone’s running memory RAM.The body storage memory is called ROM. Saying that has become a convention.
Replace the flash memory chip
