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[VME Boards] [
VPX boards] [VXS boards]
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The VXS board is the new style of VME interface. VXS stands for VMEbus Switched Serial Standard. The standard is VITA 41. VXS has the same form factor as standard VME boards, but uses a different type of connector and a different electrical interface.
The VXS specification defines 2 types of boards: Payload cards and Switch cards. Payload cards are standard VME64x boards with a new PO connector for serial links. Switch cards are not backward compatible with the legacy VMEbus standard via P1 and P2 connectors.
VXS Backplanes may operate in a number of configurations; Star, Dual-Star, Mesh, or Daisy-Chain. VXI supports InfiniBand
bus, Serial RapidIO, Gigabit
Ethernet, and PCI
Express Bus.
Three card heights are allowed with VME; 3U, 6U, or 9U; a single slot
card is 6T wide. Length is either 160mm or 340mm (Norm). The other
possible lengths are: 100/160/220/280/340/400mm. How ever VXS needs a P0 connector which does not exist in a 3U card format.
Height is given in 'U', Length is given in 'mm', Width is given in 'T';
Most card sizes listed are one slot or 6T wide.
A size PWB = 3U x 160mm, not VXS compatible.
B size PWB = 6U x 160mm,
C size PWB = 6U x 340mm,
D size PWB = 9U x 340mm ... H x L x W {@ width=6T}
VMEbus Extender cards come in any one of the board sizes
listed above. Extender boards are used to extend the card under test out
the front of the VME chassis [so it may be worked on].
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