Dell 0K6V3V, 0J05YT user manual Power, Memory

Rev 1.0

Card Interfaces

2.1.2PCI 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.

2.1.3I2C-compatible Interface

A three-pin header on the mezzanine cards is provided as the I2C-compatible interface.

Figure 6: I2C Connector

2.2Power

All adapter cards receive 12V and 3.3V power from the PCI Express connector. All other required power voltages are generated by on-board switch mode regulators. See Appendix A.2,“Specifications,” on page 30.

2.3Memory

The mezzanine cards support multiple memory devices through the PCI Express, SPI (Flash), and I2C-compatible interfaces.

2.3.1System Memory

The mezzanine cards utilize the PCI Express interface to store and access fabric connection infor- mation on the system memory.

2.3.2SPI

The mezzanine cards include one SPI Flash device accessible via the Flash interface of the Con- nectX®-3 device.

12

Mellanox Technologies