CompactFlash - Technical Details

Technical Details

The CompactFlash interface is a 50-pin subset of the 68-pin PCMCIA connector. "It can be easily slipped into a passive 68-pin PCMCIA Type II to CF Type I adapter that fully meets PCMCIA electrical and mechanical interface specifications", according to compactflash.org. The interface operates, depending on the state of a mode pin on power-up, as either a 16-bit PC Card (0x7FF address limit) or as an IDE (PATA) interface.

CompactFlash IDE mode defines an interface that is smaller than, but electrically identical to, the ATA interface. The CF device contains an ATA controller and appears to the host device as if it were a hard disk. CF devices operate at 3.3 volts or 5 volts, and can be swapped from system to system. CompactFlash supports C-H-S and 28-bit Logical block addressing (CF 5.0 introduced support for LBA-48). CF cards with flash memory are able to cope with extremely rapid changes in temperature. Industrial versions of flash memory cards can operate at a range of −45° to +85°C.

NOR-based flash has lower density than newer NAND-based systems, and CompactFlash is therefore the physically largest of the three memory card formats introduced in the early 1990s, being derived from the JEIDA/PCMCIA Memory Card formats. The other two are Miniature Card (MiniCard) and SmartMedia (SSFDC). However, CF did switch to NAND type memory later. The IBM Microdrive format implements the CF Type II interface, but is not solid-state memory. Hitachi and Seagate also make microdrives.

Read more about this topic:  CompactFlash

Other articles related to "technical details, technical, details":

In Concert, Zürich, October 28, 1979 - Technical Details
... In 2009 the 4 CD set 'Crystal Silence, The ECM Recordings 1972-79' was released, containg the three albums 'Crystal Silence' (1973), 'Duet' (1979) and the full LP-edition of 'In Concert' (1980). ...
Gravity's Rainbow - Plot Summary
... also draws heavily on themes that Pynchon had probably encountered at his work as a technical writer for Boeing, where he edited a support newsletter for the ... The story details Pökler's annual meetings with his daughter Ilse, and his growing paranoia that Ilse is really a series of impostors sent each year to mollify him ... Through this story, we find out sparse details about the S-Gerät, including that it has an approximate weight of forty-five kilograms ...

Famous quotes containing the words details and/or technical:

    Different persons growing up in the same language are like different bushes trimmed and trained to take the shape of identical elephants. The anatomical details of twigs and branches will fulfill the elephantine form differently from bush to bush, but the overall outward results are alike.
    Willard Van Orman Quine (b. 1908)

    Where there is the necessary technical skill to move mountains, there is no need for the faith that moves mountains.
    Eric Hoffer (1902–1983)