XMC
XMC (Switched Mezzanine Card) Graphics Cards For Video Capture, Processing, Encoding And Display
XMC video graphics cards can include an integrated NVIDIA GPU and/or a Xilinx FPGA. Rugged air-cooled and conduction-cooled options are available for XMC modules.
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The XMC mezzanine format defined in VITA 42 is an evolution of the previous PMC format (PCI mezzanine card). The XMC specification extends PMC with the addition of new connectors that support gigabit serial interfaces in addition to alternative I/O standards.
The maximum theoretical power available in an XMC module is 100W. However, practical considerations usually require a lower maximum XMC operating power, with 25 W being a typical maximum operating power for legacy implementations, and newer system designs often allow for higher operating power.
The XMC connector is a pin-socket connector with 114 pins arranged in a 6 x 19 matrix. A single-width XMC module can have one or two 114-pin connectors (P15 and P16). Optionally, it can include PMC connectors (P11 to P14) for legacy compatibility. The standard dimensions of the XMC are 74 mm by 149 mm. There are also provisions for a shorter depth card design, with depths from 124 to 139 mm.
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The main XMC connector (P15) is reserved for serial links, power and other predefined functions. The secondary XMC connector (P16) provides user-defined pins that may include video I/O.
– XMC 1.0 connectors are defined in the basic specification VITA 42.0 XMC.
– XMC 2.0 connectors are defined in VITA 61.
– XMC+ connectors are defined in VITA 88.
The XMC 1.0, 2.0 and XMC+ connectors use the same space but are not interconnectable.
The XMC 2.0 connector was designed to be more rugged compared to the XMC 1.0 connector and has been electrically characterized to support higher frequencies (and therefore higher data throughputs).
The XMC 2.0 connector is whitish in color, so that it is easy to visually differentiate it from the black XMC 1.0 connector.
The standard stacking height of an XMC 1.0 connector is 10 mm (allowing it to fit on a carrier board with a 0.8 inch slot pitch) or 12 mm (allowing it to fit on a carrier board with a 1.0 inch slot pitch).