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XMC (Switched Mezzanine Card, VITA 42) |
Existing I/O cards can be easily converted to a true XMC form factor.
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Data Acquisition |
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General Standards Corporation is a leading supplier in data acquisition I/O boards, provides a complete family of
data acquisition cards for sonar, industrial, and embedded applications on several form factors/busses, and for many operating systems.
Functions available include analog I/O, serial I/O, and high speed parallel I/O.
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Form Factors: | |
FREE DRIVERS
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LOANER BOARDS |
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Software Drivers: |
- Windows
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- VxWorks
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- QNX
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- Linux
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- MathWorks
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- Solaris
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- Labview
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- xPC Target
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- Ask About Other Drivers
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- Up to 64 Input Channels per Board
- Programmable Sampling Rates to 50M SPS
- GPS Synchronization
- Auto-Calibration
- Multi-Board Synchronization
- Sigma-Delta and Delta-Sigma Analog I/O
- Resolutions from 12 bits to 24 bits
Analog I/O Selection Tables
- Serial Mode Protocols include Asynchronous, Bisync, SDLC, HDLC, IEEE 802.3, Synchronous Telemetry, Simple Clock/Data ("-SYNC" product line), and Di-phase.
- Transceiver support RS485, RS422, RS232, RS423, V.35, RS530, as well as other software selectable mixed protocol modes
- Up to Eight Independent Serial Channels per Board
- Synchronous Serial Data Rates up to 10 Mbits/sec
- Asynchronous Serial Data Rates up to 1 Mbits/sec
- Deep Transmit and Receive FIFOs up to 128K
- PMC and cPCI rear I/O support
- Custom Protocols Available
Serial I/O Selection Tables
- Cable Transfer speeds up to 400 mb/per second
- Large FPGA provides for flexable cable interface
- Several cable transceiver options including RS-422, RS-485, LVDS, PECL, and TTL
Digital I/O Selection Table
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XMC [VITA 42], Switched Mezzanine Card , is compatible with Compact PCI or the VME board standards, and ATCA carrier cards.
The XMC board standard is based on the PMC mechanical definition, and occupies the same board area. Among the differences between XMC and PMC standards are the addition of a
new set of connectors and a fabric interconnect.
The XMC board dimensions is 74mm x 149mm for single width cards, or 149mm x 149mm for double width Modules. The XMC standard adds to the PMC specification by adding switched
fabric interconnects to the existing PCI bus interface. An XMC module adds one, or optionally two, new connectors to the connectors already on a PMC. The new connectors support
high-speed differential signals for fabric communications.
PCIe is a technology which is a receiving further development and improvement. The initial standard version in general use is
PCIe 1.1; however, PCI-SIG announced the availability of the PCI Express Base 2.0 specification on 15 January 2007. PCIe
2.0 doubles the data rate of each lane from 250 MP/s to 500 MP/s. PCIe 2.0 is still compatible with PCIe 1.1 as a physical
interface slot and from within software, so older cards will still be able to work in machines fitted with this new version. Further
information on PCIe 2.0 is detailed below.
PCIe is backwards-compatible with PCI, and operating systems can boot on the use a PCIe-based system without
modification.
A single PCI Express serial link is a dual-simplex connection using two pairs of wires, one pair for transmit and one pair for
receive, and can only transmit one bit per cycle. Although this sounds limiting, it can transmit at the extremely high speed of 2.5
Gbps, which equates to a burst mode of 320 MBps on a single connection. These two pairs of wires is called a lane.
You can install PCI Express adapters in larger slots but not smaller ones. For example, you can install a PCI Express x1
adapter into an x16 slot (but will still operate at the x1 speed), but you cannot insert an x16 adapter into anx1 slot. This
compatibility is shown in Table 5.3* below.
PCI Express currently runs at 2.5 Gbps, or 200 MBps per lane in each direction, providing a total bandwidth of 80 Gbps in a
32-lane configuration, and up to 160 Gbps in a full duplex x32 configuration.
Future frequency increases will scale up total bandwidth to the limits of copper (which is 12.5 Gbps per wire) and significantly
beyond that via other media without impacting any layers above the physical layer in the protocol stack. The table below
shows the throughput of PCI Express at different lane widths.
*Table 5.3: XMC Standards
VITA 42.0 XMC [These are all Draft Standard for Trial Use]
VITA 42.1 XMC Parallel RapidIO Protocol Layer Standard [XMC Switched Mezzanine Card: Parallel RapidIO]
VITA 42.2 XMC Serial RapidIO Protocol Layer Standard [XMC Serial RapidIO Protocol Layer Standard]
VITA 42.3 XMC PCI Express Protocol Layer Standard
VITA 42.4 XMC HyperTransport Protocol Layer Standard [Not being worked]
VITA 42.5 XMC Aurora Pin Assignments [Not being worked]
VITA 42.10 XMC General Purpose I/O Standard [Not being worked]
Any PMC I/O board can be used on PCI Express, PCI-X, cPCI-X, PCI, cPCI, PC-104-Plus via an adapter. Our I/O
boards are being converted to PCI Express boards as opportunities arise, view our extensive line of I/O boards.
We have software drivers available for numerous operating systems including VxWorks, Linux, and Windows.
Click Here for more information on software driver availability.
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