7.4.4.1 Board Temperature Sensor
This sensor is located in the position shown in Figure A-1. A Maxim 1617 or 1617A device is
used to measure this reading, and the result is returned by the IPMI subsystem in degrees
Celsius. The sensor has a quoted accuracy of +/- 3
o
C over the operating temperature range of
the board. The resolution is 1
o
C.
7.4.4.2 CPU Temperature Sensor
This sensor is located inside the CPU chip itself. A Maxim 1617 or 1617A device is used to
measure this reading, and the result is returned by the IPMI subsystem in degrees Celsius. The
sensor has a quoted accuracy of +/- 3
o
C over a range of +60
o
C to +100
o
C, and of +/- 5
o
C
outside this range. The resolution is 1
o
C.
7.4.4.3 Fan Monitor
Fan failure is detected by a single change in the state of the fan monitor input on the J5
connector. The signal state which indicates failure is set in the Sensor Data Record (SDR) for
this sensor. The Assertion Event Mask / Lower Threshold Reading Mask and Deassertion Event
Mask / Upper Threshold Reading Mask fields are used to set these parameters. The default
settings for these fields select an active low fan failure indication. To select an active high fan
failure indication, the pre-defined SDR must be deleted and replaced by one which sets these
fields to 0002h.
7.4.4.4 Voltage, +12V Sensor
The sensor reading returned for this sensor must be converted to a voltage reading by the
application software. Using the default parameters for this sensor, multiply by 0.0708 to convert
the reading to a voltage.
7.4.4.5 Voltage, +5V Sensor
The sensor reading returned for this sensor must be converted to a voltage reading by the
application software. Using the default parameters for this sensor, multiply by 0.0244 to convert
the reading to a voltage.
7.4.4.6 Voltage, +3.3V Sensor
The sensor reading returned for this sensor must be converted to a voltage reading by the
application software. Using the default parameters for this sensor, multiply by 0.0244 to convert
the reading to a voltage.
7.4.4.7 Voltage, -12V Sensor
The sensor reading returned for this sensor must be converted to a voltage reading by the
application software. Using the default parameters for this sensor, multiply by (-0.0781) to
convert the positive sensor reading into a voltage in the range -12V to 0V.
7.4.4.8 CompactPCI Slot Number
This sensor reading indicates board slot number which is read from geographic address pins on
the CPCI backplane. The possible values are from 0 to 31.
7.4.4.9 CompactPCI BDSEL Signal
This sensor reading indicates status of the BDSEL# pin on the CPCI backplane. The board is
fully seated if the value is 1. If the value is 0, the board is not fully seated.
7-8
PP 110/01x
Intelligent Platform Manager Interface
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