Intel® Server Boards SE7320SP2 and SE7525GP2
Platform Management
Revision 4.0
115
5.3.2
System Reset Control
5.3.2.1
Reset Signal Output
The mBMC asserts the
System Reset
signal on the server board to perform a system reset. The
mBMC asserts the
System Reset
signal before powering the system up. After power is stable
(as indicated by the power subsystem
Power Good
signal), the mBMC sets the processor
enable state as appropriate and de-asserts the
System Reset
signal, taking the system out of
reset.
To reset the system without a power state change, the mBMC:
Asserts the
System Reset
signal.
Holds this state for as long as the reset button is pushed. When a command is used to
generate a system reset, the state is held for the stipulated time.
De-asserts the
System Reset
signal.
5.3.2.2
Reset Control Sources
The following table shows the reset sources and the actions taken by the system.
Table 54. System Reset Sources and Actions
#
Reset Source
System Reset?
mBMC Reset
1
Standby power comes up
No (no DC power)
Yes
2
Main system power comes up
Yes
No
3
Reset button or in-target probe (ITP) reset
Yes
No
4
Warm boot (example: DOS Ctrl-Alt-Del)
Yes
No
5
Command to reset the system
Yes
No
6
Set Processor State command
Yes
No
7
Watchdog timer configured for reset
Yes
No
8 FRB3
failure
Yes
No
9 PEF
action
Optional
No
5.3.3
Temperature-based Fan Speed Control
Server board 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 server board 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 because the fan’s state is still ‘OK’ from the system
point-of-view.
Summary of Contents for SE7320SP2 - 800MHZ Ecc Ddr Xeon
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