Erasable Programmable Read Only Memory, or EPROM for short, is a kind of computer memory chip that can keep data on it even when the power supply is turned off. In other words, this data is permanent. An EPROM can be programmed and erased many times with the help of the EPROM programmer device. EPROM programmer, It erases the coded program on the EPROM by sending ultraviolet rays. The window on the chip is covered with tape after programming, as bright sunlight can easily erase the EPROM. It would be good for your system to have a backup EPROM with backup in your factory.
EEPROM
EEPROM (Electronically Erasable Programmable Read-Only Memory) is a chip used in computers or other devices to permanently store small amounts of data. EEPROM; Like EPROM, it is a memory unit that can store programs even if the power is cut off. The program in the EEPROM can be written and erased electrically. It would be good for your system to have a backup EEPROM with backup in your factory.
FLASH MEMORY-MMC CARD
Flash Memory is a type of memory that can keep its stored data even when the source power is cut off, and can be electronically erased and reprogrammed. It will be good for your system to have a spare Flash memory-MMC Card with backup in your factory.