Platform Management

Intel® Server Board SE7520JR2

Combined power and reset button assertion

If DC power is off, an assertion of the PWBTIN while the RSTIN is asserted generates an OEM-specific Control Panel event to PEF. The event attributes are: Sensor Type code - 14h (Button) and Sensor Specific offset - 07h. This PEF action initiates a BIOS CMOS clear request to the system BIOS.

The user interface of the control panel consists of the following indicators:

Power LED

Fault/Status LED

Chassis ID LED

For user input, the standard control panel can provide the following buttons/switches:

Reset button

Power button

NMI/SDI button

Chassis ID button

Chassis intrusion switch (optional)

5.3.5.4Control Panel Indicators

The mBMC is capable of supporting three control panel indicators: Power LED, Fault/Status LED, and Chassis ID LED. The states of these indicators and how they relate to the mBMC/chassis state are detailed below.

5.3.5.4.1Power LED

The BIOS controls the control panel Power LED as described in the table below.

Table 49: SSI Power LED Operation

State

Power Mode

LED

Description

 

 

 

 

Power Off

Non-ACPI

OFF

System power is off, and the BIOS has not initialized the chipset.

 

 

 

 

Power On

Non-ACPI

ON

System power is on, but the BIOS has not yet initialized the chipset.

 

 

 

 

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Revision 1.0

 

C78844-002