Technical Product Specification

Table Of Contents
Server Management Intel
®
Server Board S5400SF TPS
Revision 2.02
Intel order number: D92944-007
56
4.4.4.1 Chassis Intrusion
Some systems support chassis intrusion detection. On systems that support chassis intrusion detection,
the Integrated BMC monitors the state of the Chassis Intrusion signal and makes the status of
the signal available via the Get Chassis Status command and the Physical Security sensor state.
If enabled, a chassis intrusion state change causes the Integrated BMC to generate a Physical
Security sensor event message with a General Chassis Intrusion offset (00h).
The Integrated BMC boosts all fans when the chassis intrusion signal is active. This provides
sufficient cooling when a technician has the cover removed while servicing the system. Fans
return to their previous level when the chassis intrusion signal is no longer active.
4.4.4.2 Reset Button
An assertion of the Front Panel Reset signal to the Integrated BMC causes the system to start
the reset and reboot process, as long as the Integrated BMC has not locked out this input. This
assertion is immediate and without the cooperation of any software or operating system running
on the system.
4.4.4.3 Diagnostic Interrupt (Front Panel NMI)
As stated in the IPMI Specification, Version 2.0, a diagnostic interrupt is a non-maskable
interrupt (NMI) or signal for generating diagnostic traces and ‘core dumps’ from the operating
system. For Intel
®
server boards, this is an NMI.
The diagnostic interrupt button is connected to the Integrated BMC through the front panel
connector. Pressing the diagnostic interrupt button causes the Integrated BMC to do the
following:
Generate a Critical Event sensor event message with a Front Panel NMI/Diagnostic
interrupt offset (00h), if enabled.
Set the OEM 1 (40h) bit in the message flags. The message flags can be read with the
Get Message Flags command and cleared with the Clear Message Flags command.
Set bit 0 in NMI source 1. This information can be retrieved with the Get NMI Source
command.
Generate a system NMI pulse.
Once an NMI has been generated by the Integrated BMC, the Integrated BMC does not
generate another NMI until the system has been reset or powered down.
The Integrated BMC automatically clears the OEM 1 message flag and NMI sources whenever
it detects a system reset, or is itself reset. The diagnostic interrupt button is not disabled or
otherwise affected when the system is in secure mode, although the Set Secure Mode Options
command can be used to block the use of this button.
4.4.4.4 Chassis Identify
The front panel chassis identify button toggles the state of the chassis ID LED. If the LED is off,
then pushing the ID button lights the LED. It remains lit until the button is pushed again or until a
Chassis Identify or a Chassis Identify LED command is received to change the state of the LED.