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rom

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ROM

(1) In an Android phone, a file for firmware updating. See Android ROM. (2) (Read Only Memory) A memory chip that permanently stores instructions and data. Also known as "mask ROM," its...

Dictionary

Definition: ROM

(1) In an Android phone, a file for firmware updating. See Android ROM.

(2) (Read Only Memory) A memory chip that permanently stores instructions and data. Also known as "mask ROM," its content is created in the last masking stage of the chip manufacturing process, and it cannot be changed. Stand-alone ROM chips and ROM banks in microcontroller chips are used to hold control routines for a myriad of applications. ROMs were also widely used to hold the BIOS in early PCs as well as plug-in cartridges for video games.

Although EPROMs, EEPROMs, and particularly flash memory, are the kinds of non-volatile storage one hears about more often, ROM technology is mature, inexpensive and easy to integrate into any CMOS chip. See memory types, RAM, EEPROM and flash memory.


ROM

ROMs Are Everywhere
Cartridges that contain nothing more than a ROM chip are widely used to hold games and educational programs. The yellow ROM cartridge in this image (bottom right) contains a program for the LeapPad Learning System for preschoolers.





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