Intel SE7520JR2 C78844-002, •Power button assertion, •Reset button assertion, 5.3.5.2Reset Control Sources, Intel® Server Board SE7520JR2, 5.3.5.3Control Panel System Reset

Intel® Server Board SE7520JR2 Platform Management

5.3.5.2Reset 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

5.3.5.3Control 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 controller2, 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.

2The 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.

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