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Intel® Server Board SE7520JR2 Platform Management
Revision 1.0
C78844-002
127
5.3.5.2 Reset Control Sources
The following table shows the reset sources and the actions taken by the system.
Table 48: System Reset Sources and Actions
Reset Source System Reset? mBMC Reset
Standby power comes up No (no DC power) Yes
DC power comes up Yes No
Reset button or in-target probe (ITP) reset Yes No
Warm boot (DOS ctrl-alt-del, for example) Yes No
Command to reset the system Yes No
Set Processor State command Yes No
Watchdog timer configured for reset Yes No
FRB3 failure Yes No
PEF action Optional No
5.3.5.3 Control Panel System Reset
The reset button is a momentary contact button on the control panel. Its signal is routed through
the control panel connector to the mBMC, which monitors and de-bounces it. The signal must
be stable for at least 25 ms before a state change is recognized.
If Secure Mode is enabled or the button is forced protected, the reset button does not reset the
system. A Platform Security Violation Attempt event message is instead generated.
Control Panel User Interface
When an optional Intel® Management Module is not present, the mBMC acts as the control
panel controller
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, processing signals from the control panel switches and LEDs.
When the flexible management connector is populated, the mBMC stops acting on the control
panel reset and power button inputs. This becomes the responsibility of the Intel® Management
Module.
The mBMC supports three control panel events.
• Power button assertion
A low-level signal at PWBTIN indicates that the power button is being pressed. This
input is bridged to the PWBTOUT output if Control Panel Lockout is disabled. The
“Control Panel Power Button pressed” event is logged in the SEL.
• Reset button assertion
A low-level signal at RSTIN indicates that the reset button is being pressed. This input is
bridged to the RSTOUT output if Control Panel Lockout is disabled. The “Control Panel
Reset Button pressed” event is logged in the SEL.
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The Intel® Local Control Panel with LCD, is not supported with on-board platform management. Either an IMM
Professional Editaion or Advanced Edition must be installed to support this chassis option.