Mellanox Technologies ConnectX-3 MCX312A-XCBT, Руководство пользователя

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ConnectX®-3 Ethernet Dual SFP+ Port Adapter Card User Manual Rev 1.4
Mellanox Technologies
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2.4.1 System Memory
The adapter cards utilize the PCI Express interface to store and access Ethernet fabric connection
information and packet data on the system memory.
2.4.2 SPI
Each of the adapter cards includes one 16MB SPI Flash device (M25PX16-VMN6P device by ST
Microelectronics) accessible via the SPI interface of the ConnectX®-3 EN device.
When a jumper is inserted into the drill holes in the adapter it indicates to the device that the on-
board Flash device should not be used for boot instructions. Contact your Mellanox support repre-
sentative should you need to use this jumper. Table 5 provides information on this jumper. The
jumper location on the board is illustrated in Appendix A.2, “Board Mechanical Drawing and
Dimensions,” on page 32.
Table 5 - Jumper Configuration
Description Option
Card Default
Configuration
Flash present/
not present
connection open – Flash present
connection shorted – Flash not present
connection open –
Flash present
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).
The PCI VPD (Vital Product Data) layout for each of the adapter cards complies with the format
defined in the
PCI 3.0 Specification, Appendix I.
Table 6 - MCX312A-XCBT VPD Layout
Offset
(Decimal)
Item Value Format Description
0 Large Resource Type ID
String Tag (0x02)
0x82
1 Length [7:0] LSB 0x18
2 Length [15:8] MSB 0x0