Cognex MVS-8000 Series, Руководство по оборудованию

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1 MVS-8600 Installation
MVS-8600 Hardware Manual 15
The PCI-X Bus
The PCI-X bus was introduced to address some of the PCI bus limitations and to support
the higher performance requirements of newer computers. All PCI-X card slots are
64-bits wide although the bus will accommodate 32-bit operation for boards using that
design. The PCI-X bus clock runs at 66 MHz and higher and will not support boards
designed to run at 33 MHz.
Table 1 below summarizes the support for the PCI bus and PCI-X bus.
Table 1. PCI and PCI-X summary
Notes
The PCI and PCI-X buses are shared buses and requires all cards on a given bus
segment to run at the same clock speed. So, if another board plugged into your PCI
bus segment runs at only 33 MHz, all other boards plugged into the same segment
are limited to 33 MHz.
Also note that most PC motherboards support more than one PCI bus segment and
you cannot tell which card slots are on the same segment by looking at the
motherboard. You can only get this information from the motherboard
specifications.
Data Path
Clock
Speed
Bus Bandwidth
(MBytes/sec)
[Theoretical] Bus Bandwidth
(MBytes/sec)
[Sustainable]
PCI 32-bits 33 MHz 133 80
66 MHz 266 160
64-bits 33 MHz 266 160
66 MHz 533 300
PCI-X
1
32-bit 66 MHz 533 300
64-bit 66 MHz 533 300
Note 1: The MVS-8601 and MVS-8602 have a maximum speed of 66 MHz.
When used in PCI-X slots with higher speeds, the boards operate at 66
MHz.