DiskOnChip 2000 DIP
2
Detailed Feature List
TrueFFS Technology
For a flash disk to emulate a hard disk, a software management layer is required. TrueFFS is
M-Systems’ patented flash file system management technology that allows flash components to fully
emulate hard disks, so they can be written to and read from like any other hard disk.
TrueFFS software simplifies and enhances flash memories by:
•
Using third-generation wear leveling, which ensures that all blocks are erased an equal number of
times. This increases the life of the flash media by orders of magnitude.
•
Using virtual blocking of the flash device to make erasure of large blocks transparent to the
operator.
•
Automatic block mapping.
•
Implementing a robust power-loss recovery mechanism to guarantee absolute protection of data.
•
Providing conventional address support for various architecture configurations.
•
The TrueFFS driver supports 8-bit, 16-bit, and 32-bit bus architectures. Support for the 16-bit and
32-bit bus architectures, typically used in RISC processors, can be achieved by using the LSB of
the data bus as follows:
For 16-bit address boundary shifts, shift the address lines by one, so that the host address line
A1 connects to DiskOnChip 2000 address line A0, the host address line A2 connects to
DiskOnChip 2000 line A1, and so on.
For 32-bit address boundary shifts, shift the address lines by two, so that the host address line
A2 connects to DiskOnChip 2000 address line A0, the host address line A3 connects to
DiskOnChip 2000 line A1, and so on.
Refer to Application Note AP-DOC-030 for more details.
Low Power Consumption
The internal functions are synchronized with the CPU’s read and write strobes. This innovation
eliminates the need for an external clock and dramatically reduces power consumption.
DiskOnChip 2000 requires only a single 3.3V or 5V power supply, which helps simplify integration.
These features make DiskOnChip 2000 the best cost/performance solution for computers that require
minimal weight, space, and power consumption, providing a very attractive alternative to
conventional hard and floppy disk drives.
Temperature Range
DiskOnChip 2000 is available in both commercial (0 ºC to +70 ºC) and extended (-40 ºC to +85 ºC)
temperature ranges.
* DiskOnChip 2000 192MB and 576MB capacities are available only for commercial temperature ranges.
91-SR-002-42-8L Rev.
3.4
5
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