SE7210TP1-E Datasheet, PDF (106/145 Pages) Intel Corporation – Intel® Server Board Technical Product Specification

Intel® Server Board SE7210TP1-E TPS
Platform Management Architecture
5.2.2.2
Reset Control Sources
The following table shows the reset sources and the actions taken by the system.
Table 53: System Reset Sources and Actions
#
Reset Source
1 Standby power comes up
2 Main system power comes up
3 Reset button or in-target probe (ITP) reset
4 Warm boot (example: DOS Ctrl-Alt-Del)
5 Command to reset the system
6 Set Processor State command
7 Watchdog timer configured for reset
8 FRB3 failure
9 PEF action
System Reset?
No (no DC power)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Optional
PC87431 Reset
Yes
No
No
No
No
No
No
No
No
5.2.3
Temperature-based Fan Speed Control
Baseboard hardware implements an ambient-temperature-based Fan Speed control that is part
of normal system operation. With one exception, the management controller does not
participate in fan speed control. The feature allows the baseboard to drive different fan speeds
based on various temperature measurements in order to lower the acoustic noise of the system.
The ambient-temperature thresholds at which the Fan Speed increases does not correspond to
a non-critical (warning) condition for the fan - since the fan’s state is still ‘OK’ from the system
point-of-view.
The baseboard has two analog Fan Speed signals that are driven by pulse-width modulator
(PWM) circuits by the baseboard hardware. These signals can be driven to several levels
according to temperature measurements. Multiple bytes of a Sensor Initialization Table is used
to hold parameters that set the temperature thresholds and corresponding PWM duty cycles.
This SDR or table is loaded as part of the baseboard configuration.
The management controller firmware expects to find an LM30 temperature sensor on the front
panel board. Thus, the ambient temperature-based fan speed control capability is not enabled
by default, but can be enabled via a management controller configuration change.
5.2.3.1
Fan Kick Start
Some fans may not begin rotating unless started at high speed. To ensure that the fans start,
the baseboard hardware will start and run the fans at high speed for a brief interval following
system power up.
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