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ICMB Connector (J1D2)
The external Intelligent Management Bus (ICMB) provides external access to IMB devices that are within the chassis. For example, you can externally access chassis management functions, alert logs, and
Table 58. ICMB Connector (J1D2)
Pin | Signal | Type | Description |
1 | SDA | signal | IPMB I2C Data |
2 | Ground | power |
|
3 | SCL | signal | IPMB I2C Clock |
4 | 5 V standby | power |
|
Auxiliary I2C Connector (J9E4)
TheSKA4 baseboard provides a
A shorted I2C connection at the auxiliary I2C connector will prevent restoration of main power because the BMC needs the bus to boot the server from standby power.
Table 59. IMB Connector Pin out (J8F1)
Pin | Signal | Description |
1 | Local I2C SDA | BMC IMB 5VSTNDBY Clock Line |
2 | GROUND |
|
3 | Local I2C SCL | BMC IMB 5VSTNDBY Data Line |
Baseboard Fan Connectors (J3C1, J3A1, J4A1, J4C1)
There are four fan connectors located on the baseboard. These connectors are to be used for additional processor cooling.
The SKA4 baseboard only supports monitoring a total of 8 tachometer fan inputs. The front panel connector provides connections to all 8 tachometer fan inputs. The tachometer signals from these four processor fan connectors are connected to the same tachometer fan signals FAN_TACH(4), FAN_TACH(5), FAN_TACH(6), FAN_TACH(7) provided on the front panel connector J9E3. Therefore take care to ensure only one connection is utilized at any given time.
Table 60. Processor Fan Connector #1 (J3C1)
Pin | Signal | Type* | Description |
1 | Ground | power | GROUND is the power supply ground |
2 | 12V | power | Power Supply 12V |
3 | Fan Tach | out | FAN_TACH signal is connected to the BMC to monitor the FAN speed |
*Type (in/out) is from the perspective of the baseboard.
Technical Reference | 105 |