IXB28504XGBEFS Intel, IXB28504XGBEFS Datasheet - Page 54

• Manufacturer Part Number: IXB28504XGBEFS
• Manufacturer: Intel

Specifications of IXB28504XGBEFS

• Lead Free Status / Rohs Status: Compliant

4.7
4.7.1
4.7.1.1
Figure 18.
Intel NetStructure
TPS
54
®
There is the possibility of upgrading the entire FRU Information. The standard BMC
upgrade procedure (see
should be used for this purpose.
Sensors and SDR
IXB2850 boards have the capability of providing low-level (temperature, voltage, and
current) diagnostics for selected devices installed on the board characterized by the
highest heat emission or power consumption. These diagnostics capabilities are used
by the BMC to control the health of a board and prevent damage. The BMC is
responsible for controlling:
The BMC uses sensor devices connected to local I
mentioned board parameters. If temperature, voltage or current on a board is higher or
lower than the nominal values described in the Sensor Device Records (SDR), the BMC
is responsible for sending notification to the ShMC or possibly shutting down entire
board.
After booting, the BMC polls only those sensors that do not require initialization.
Sensors requiring initialization must be initialized by the ShMC before they are polled
by the BMC. Once the BMC detects that a given sensor has been initialized, the sensor
is included in the set of monitored sensors.
Sensor Map
The BMC is responsible for providing the ShMC and the NPU with the definition of all
board sensors. In response to a request from the ShMC or the NPU, the BMC provides
the requested readings taken from a specified sensor. To make this possible, the BMC
builds and maintains a sensor map. Each entry in this table describes one sensor. The
sensor number is used as the sensor map table index. Note that this table contains
physical sensors (for example, temperature or voltage) as well as logical sensors (for
example, a processor).
Sensor Numbering in the SDR
Each board sensor has its own unique number defined in the Sensor Data Record
(SDR). This number is used to address a given sensor during initialization and reading
operations. The IXB2850 board uses multi-sensor devices that contain a few physical
sensors within the confines of one physical device. For that reason, a raw I
address is not sufficient information to address a physical sensor. The format of the
SDR sensor number is shown in
SDR sensor number format
The SDR sensor number consists of two parts:
• The temperature of selected baseboard and extension card devices
• The baseboard and extension card voltage
• The current drawn from selected power supplies
• Device ID – A device identifier pointing to a record in the board FRU Information
• Device node – The number of a physical sensor within the confines of the
IXB2850 Packet Processing Boards
fully describing the physical sensor device. ID=00h has been reserved for a logical
sensor on a board (for example, processor or hot swap sensor).
referenced physical multi-sensor device.
Section 8.6, “Non-Volatile Storage Programming” on page
Device ID
(5 bits)
Figure
18.
Device node
(3 bits)
2
C bus to control the above-
IXB2850—Hardware Management
Document Number: 05-2443-006
2
C bus
January 2007
104)