Anonymoususer852: Migrated the majority of contents from Flash memory, this should allow future expansions such as Solid-State Drive, (e)MMC, etc.

2025-08-15T17:15:04Z

Migrated the majority of contents from Flash memory, this should allow future expansions such as Solid-State Drive, (e)MMC, etc.

New page

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'''Flash memory''' is solid-state non-volatile computer memory, which can be read and written and keeps its values even with power off. Common uses include [[Solid-State Drive]], [[thumb drive]]s, and many other devices which uses it for storage. A type of "managed Flash memory" is [[Secure Digital]] (SD).

The two main types are NAND and NOR, named after the logic gates they resemble. NAND memory is written or read in blocks, so it is suitable for substituting for disk drives (which read and write in sectors). NOR memory can read or write single bytes, so it can substitute for RAM.

Before flash memory, non-volatile memory consisted of either Eraseable Programmable Read Only Memory (EPROM) which could only be reprogrammed via exposing the transparent window to ultra-violet light, or Electronically Eraseable Programmable Read Only Memory (EEPROM) which could be rewritten in small blocks or single bytes, but were slow. Once data is written, these behaves like [[ROM|Read Only Memory(ROM)]]

== Links ==
* [[Wikipedia:Flash memory|Wikipedia article]]
* [http://139.138.48.19/pdf/NAND/Toshiba/NandDesignGuide.pdf.pdf NAND flash applications design guide (Toshiba)]]
* [http://dreher.net/?s=projects/CFforApple1&c=projects/CFforApple1/main.php Compact Flash interface card for Apple I]
* [http://dreher.net/?s=projects/CFforAppleII&c=projects/CFforAppleII/main.php Compact Flash interface card for Apple II]

Category:Flash memory - Revision history

Anonymoususer852: Migrated the majority of contents from Flash memory, this should allow future expansions such as Solid-State Drive, (e)MMC, etc.