Technical Product Specification

Table Of Contents
Server Management Intel
®
Server Board S5400SF TPS
Revision 2.02
Intel order number: D92944-007
70
event state (sensor offset) has been asserted, it remains asserted until one of the following
occurs:
A Rearm Sensor Events command is executed for that processor status sensor.
A Processor Retest command is executed. The BIOS sends this command to the
Integrated BMC as a result of a user choosing the Processor Retest option from the
BIOS Setup screen.
AC power cycle occurs. This will only clear persistent bits of the sensor if the processor
is not present.
DC power-on and system resets do not re-arm processor status sensors.
Table 26. Requirements for Processor Status
Offset Processor Status Detected By Persistent
0 IERR
Integrated BMC
1 Thermal trip
Integrated BMC
X
2 FRB1/BIST failure Not supported
3 FRB2/Hang in POST failure BIOS
1
4 FRB3/Processor startup/initialization failure (CPU fails to start) Not supported
5 Configuration error (for instance, stepping mismatch) BIOS
6 SM BIOS uncorrectable CPU-complex error Not supported
7 Processor presence detected
Integrated BMC
8 Processor disabled N/A
9 Terminator presence detected Not supported
Note 1: Fault is not reflected in the processor status sensor.
4.16.2 Processor VRD Over-temperature Sensor
This sensor monitors a signal that indicates whether or not a processor VRD is running over the
temperature threshold. The state of this signal is not an input into the system fan control
subsystem. However, it is an input into the National Semiconductor LM94* device, which in turn
asserts the associated ProcHot signal and effectively lowers the VRD temperature. This
relationship is 1:1, i.e, if VRD-hot is asserted, then ProcHot asserts.
4.16.3 ThermalTrip Monitoring
The Integrated BMC is responsible for persistently retaining ThermalTrip history for each
processor. This history tracks whether the processor has had a ThermalTrip since the last
processor sensor re-arm or retest.
When a ThermalTrip occurs, the system hardware automatically attempts to power down the
server. Before the system is allowed to power down, the Integrated BMC polls the ThermalTrip
status for each processor, at which point the power down sequence continues. If the Integrated
BMC detects that a ThermalTrip occurred, then it sets the ThermalTrip offset for the applicable
processor status sensor. As this bit is persistent across AC cycles, the Integrated BMC logs
thermal trip events every AC cycle until the processor is manually re-armed.