User`s manual

Adapter Card Interfaces
14
Rev 1.3
Mellanox Technologies
4Adapter Card Interfaces
4.1 I/O Interfaces
Each HCA card includes the following interfaces:
• QSFP InfiniBand Optical Connectors
• PCI Express x8 edge connector
• I/O panel LEDs
•I
2
C compatible connector (for debug)
4.1.1 InfiniBand Interface
The ConnectX
®
IB(MT25408) device is compliant with the InfiniBand Architecture Specification, Release 1.2. It has
compliant InfiniBand ports, 1 or 2, each having four Tx/Rx pairs of SerDes. Each of the HCA cards (listed in Table 3
on page 8) based on this device provides access to these ports by means of QSFP InfiniBand connectors. These cards
are also compliant with the IBTA specification 1.2. Dual port cards have the following port to connector correspon-
dence. Port 1 connects to connector 1 of the device, while port 2 connects to connector 2.
Figure 4: Port Numbering
4.1.2 PCI Express Interface
The ConnectX IB HCA adapter cards support PCI Express 2.0 (1.1 compatible) through an x8 edge connector. The
device can be either a master initiating the PCI Express bus operations or a slave responding to PCI bus operations.
Port 2
Port 1