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Rev 1.0
2.1.2 PCI Express Interface
The ConnectX®-3 mezzanine cards support PCI Express 3.0 (1.1 and 2.0 compatible) . The device
can be either a master initiating the PCI Express bus operations or a slave responding to PCI bus
operations.
2
2.1.3 I
C-compatible Interface
A three-pin header on the mezzanine cards is provided as the I
2.2
Power
All adapter cards receive 12V and 3.3V power from the PCI Express connector. All other required
power
Appendix A.2,"Specifications," on page 30.
2.3
Memory
The mezzanine cards support multiple memory devices through the PCI Express, SPI (Flash), and
2
I
C-compatible interfaces.
2.3.1 System Memory
The mezzanine cards utilize the PCI Express interface to store and access fabric connection infor-
mation on the system memory.
2.3.2 SPI
The mezzanine cards include one SPI Flash device accessible via the Flash interface of the Con-
nectX®-3 device.
12
Mellanox Technologies
Great user manuals database on
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2
2
Figure 6: I
C Connector
by
on-board
switch
C-compatible interface.
mode
regulators.
Card Interfaces
See
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