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Express Logic develops, markets and supports the ThreadX® real-time operating system (RTOS), NetXTCP/IP networking stack, USBX USB stack, FileX® embedded file system, and PEGX GUI toolkit for embedded applications.
ThreadX is a royalty-free, full source code, small-footprint, low-overhead RTOS that is extremely easy to learn and use. ThreadX is one of the most widely deployed RTOS products in the world, with over 1.25 billion products based on ThreadX.
Definition: A PCI Mezzanine Card or PMC is a printed circuit board manufactured to the IEEE P1386.1 standard.
This standard combines the electrical characteristics of the PCI bus with the mechanical dimensions of the Common Mezzanine Card or CMC format (IEEE 1386 standard). A PMC card can have 2 bus connectors ('P1' and 'P2'), supporting 32 bit PCI signals; 3 bus connectors ('P1', 'P2' and 'P3') supporting 64 bit PCI signals, and / or a 4th bus connector ('P4') supporting non-specified I/O signals.
In addition, arbitrary connectors can be supplied on the front panel, or 'bezel'. The PMC standard defines which connector pins are used for which PCI signals; in addition it defines 64 of the (optional 'P4') connector pins for use of arbitrary I/O signals.
It enables manufacturers to offer products that are compatible with the well-established PCI bus, but in a smaller and more robust package than standard PCI plug-in cards.
The word mezzanine, meaning a platform inserted between two floors of a building, describes the way in which a PMC card fits between two adjacent host cards in a standard card rack, attached to one of the cards by connectors and mounting pillars.
A single PMC measures 74 mm x 149 mm. The standard also defines a double-sized card, but this is rarely used.
Source: Wikipedia (http://en.wikipedia.org/wiki/PCI_mezzanine_card)
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