Intel® Server Boards SE7320SP2 and SE7525GP2
Platform Management
Revision 4.0
117
5.3.4.2 Reset
Button
The reset button is a momentary contact button on the front panel. Its signal is routed through
the front panel connector to the mBMC, which monitors and de-bounces it. The signal must be
stable for at least 25ms before a state change is recognized.
An assertion of the front
Panel Reset
signal to the mBMC causes the mBMC to start the reset
and reboot process. This action is immediate and without the cooperation of any software or
operating system running on the system.
If
Secure Mode
is enabled or the button is forced protected, the reset button does not reset the
system, but instead a Platform Security Violation Attempt event message is generated. The
reset button is disabled in sleep mode.
5.3.4.3
Diagnostic Interrupt Button (Front Panel NMI)
As stated in the
IPMI 1.5 Specification,
a Diagnostic Interrupt is a non-maskable interrupt or
signal for generating diagnostic traces and core dumps from the operating system. The mBMC
generates the NMI, which can be used as an OEM-specific diagnostic front panel interface.
The Diagnostic Interrupt button is connected to the mBMC through the front panel connector. A
Diagnostic Interrupt button press causes the mBMC to generate a system NMI pulse whose
duration is platform-specific and unrelated to the button press duration.
This generates an event (NMI button sensor) and PEF OEM action causes NMI generation.
5.3.4.4
Chassis ID Button and LED
The front panel interface supports a
Chassis Identify
Button and a corresponding Blue
Chassis
Identify
LED. A second Blue Chassis Identify LED is mounted on the back edge of the server
board where it may be visible when viewed from the back of an integrated system.
The LED can provide a mechanism for identifying one system out of a group of identical
systems in a high density rack environment
The Chassis Identify LED can be turned on either locally via the push-button signal, or by local
or remote software using the IPMI
Chassis Identify
command. The following list summarizes the
Chassis Identify Push-button and LED operation:
The Identify signal state is preserved on Standby power across system power-on/off and
system hard resets. It is not preserved if A/C power is removed. The initial LED state is
Off when A/C power is applied.
The IPMI
Chassis Identify
command can also be used to control the LED. If a the
Chassis Identify
command is used to turn the LED On, the command will automatically
time out and turn off the LED unless another
Chassis Identify
command to turn on the
LED is received. The default timeout for the command is 15 seconds. The server board
supports the optional command parameter to allow the timeout to be set anywhere from
1 to 255 seconds.
The optional timeout parameter in the
Chassis Identify
command also allows software to
tell the LED to go off immediately.
Summary of Contents for SE7320SP2 - 800MHZ Ecc Ddr Xeon
Page 182: ......