Intel ERP2U manual SMBus Communication, Field Replacement Unit FRU Signals, Product Info Area

SSI

ERP2U Power Supply Design Guide, V1.0

8.3SMBus Communication

STATUS

Optional

There may be SMBus communication to the power assembly to monitor the cage and modules. This would require a serial EEPROM to store FRU data of each module and communicate the information onto the SMBus. There may also be a device in the cage to monitor the module failure and presence status via the SMBus. If there is a fan in the cage, the SMBus device in the cage may also monitor the fan(s) for failure.

8.3.1Field Replacement Unit (FRU) Signals

STATUS

Optional

Two pins will be allocated for the FRU information on the power supply connector. One pin is the Serial Clock (SCL). The second pin is used for Serial Data (SDA). Both pins are bi-directional and are used to form a serial bus. The FRU circuits inside the power supply must be powered off of 5 VSB output and grounded to ReturnS (remote sense return). The Write Control (or Write protect) pin should be tied to ReturnS inside the power supply so that information can be written to the EEPROM.

8.3.2Module FRU Data

FRU data shall be stored starting in address location 8000h through 80FFh. The FRU data format shall be compliant with the IPMI specifications. The current version of these specifications are available at: http:\\developer.intel.com/design/servers/ipmi/spec.htm.

8.3.3Module FRU Data Format

The information to be contained in the FRU device is shown in the following table.

	Table 25: FRU Device Information
Area Type		Description
Common Header		As defined by the FRU document
Internal Use Area		Not required, do not reserve
Chassis Info Area		Not applicable, do not reserve
Board Info Area		Not applicable, do not reserve

8.3.3.1Product Info Area

As defined by the IPMI FRU document. Product information shall be defined as follows:

Table 26: FRU Device Product Information Area

Field Name	Field Description
Manufacturer Name	{Formal name of manufacturer}
Product Name	{Manufacturer’s model number}
Product part/model number	Customer part number
Product Version	Customer current revision
Product Serial Number	{Defined at time of manufacture}
	- 28 -