ConnectX®-2 VPI Single and Dual Port QSFP InfiniBand and Ethernet Adapter Card User Manual
Rev 1.6
Mellanox Technologies
19
2.2
Power
All adapter cards receive 12V and 3.3V power from the PCI Express Edge connector. All other
required power voltages are generated by on-board switch mode regulators. See “Specifications”
on page 44.
2.3
QSFP Power Level
The card supports power level 3, according to SFF Committee SFF-8436 Specification for QSFP
(Quad Small Form-factor Pluggable) Transceiver.
2.4
Memory
The adapter cards support multiple memory devices through the PCI, SPI (Flash) and I
2
C inter-
faces.
2.4.1 System Memory
The adapter cards utilize the PCI Express interface to store and access IB fabric and/or Ethernet
fabric connection information and packet data on the system memory.
2.4.2 SPI (Flash)
Each of the adapter cards includes one 16MB SPI Flash device (M25P16-VME6G device by ST
Microelectronics) accessible via the Flash interface of the ConnectX®-2 VPI adapter card.
There is a jumper on each adapter card that indicates to the device whether an on-board Flash
device is to be used or not. Table 9 provides information on this jumper. See the appropriate sche-
matic in Appendix A,“Specifications,” on page 44 for the jumper location.
Table 9 - Jumper Configuration
Description
Option
Card Default
Configuration
Comments
Flash present/
not present
connection open – Flash present
connection shorted – Flash not present
Figure 7: Flash Jumper
connection open –
Flash present
Header 1x2
2.4.3 EEPROM
Each board incorporates an EEPROM that is accessible through the I
2
C-compatible interface. The
EEPROM capacity is 4Kb. The EEPROM is used for storing the Vital Product Data (VPD).
