DiskOnChip
The DiskOnChip (DoC) product line became popular because they could easily be integrated into small embedded applications. The device was supplied as a module in a 32-pin dual in-line package (DIP) with a pinout and electrical interface compatible with a standard JEDEC socket for memory chips. It employed a memory-mapped interface with an 8 kilobyte (KB) window for models of all capacities (16 MB–1 GB). Internally, a DoC module contained a controller that implemented ECC, bad block re-mapping and wear leveling functions that were used to implement a file system, TrueFFS, for which the company provided software development kits.
Some time after SanDisk acquired M-Systems, they announced the end-of-life (EOL) for the DiskOnChip 2000 product line in early 2007, suggesting customers migrate to the uDOC (uDiskOnChip Embedded USB Flash Disk) product, CompactFlash, or SecureDigital cards, all of which are not directly compatible, requiring interface redesign.
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