Specifications

Baseboard Connectors
007-4276-001 127
SM Bus Connector (J9E4)
This connector allows connection to the Memory Module I2C bus on which the DIMMs
EEPROMs reside. A shorted I2C connection at the SM Bus I2C connector will prevent the
system BIOS from sizing and configuring main memory. Table A-28 shows the cable
pinout assignments for the SM bus connector.
ICMB Connector (J1D2)
The external Intelligent Chassis Management Bus (ICMB) provides external access to
ICMB devices that are within the chassis. For example, you can externally access chassis
management functions, alert logs, and post-mortem data. The ICMB connector also
18 Reserved Reserved pin: NC on baseboard
19 Reserved Reserved pin: NC on baseboard
20 GROUND Ground Ground
21 Reserved Reserved pin: NC on baseboard
22 Reserved Reserved pin: NC on baseboard
23 Reserved Reserved pin: NC on baseboard
24 Reserved Reserved pin: NC on baseboard
25 Key No connect on baseboard
26 Reserved Reserved pin: NC on baseboard
Table A-28 SM Bus Connector (J9E4)
Pin Signal Description
1 Local I2C SDA OSB4 SM bus data line
2GROUND
3 Local I2C SCL OSB4 SM bus data line
Table A-27 (continued) Server Monitor Module Connector Pinout
Pin Signal Type Description-Implementation