Front Panel/Chassis Inputs; Front Panel Lock-Out Operation - Intel X38ML - Server Board Motherboard Technical Manual

Intel® Server Board X38ML
Color State
Amber Solid on Fatal
Off N/A Not ready
Note: Support for upper non-critical state is not provided in default SDR configuration. If a user
enables this threshold in the SDR, then the system status LED behaves as described.
5.7.3

Front Panel/Chassis Inputs

The BMC monitors the front panel buttons and other chassis signals. The front panel input
buttons are momentary contact switches that are de-bounced by the BMC's integrated
hardware. The de-bounce time is 8 ms; the signal must be in a constant low state for 8 ms
before it is treated as asserted. BMC de-bouncing does not affect the operation of the power or
reset button, since the power and reset buttons are connected to the chipset. The de-bouncing
is only for BMC monitoring.
5.7.3.1 Chassis Intrusion
Chassis intrusion detection is supported. The 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. A chassis intrusion state change causes the BMC to
generate a Physical Security sensor event message with a General Chassis Intrusion offset
(00h).
The BMC boosts all fans when the chassis intrusion signal is active. Fans return to their
previous level when the chassis intrusion signal is no longer active. This provides sufficient
cooling during system servicing. The BMC monitors the chassis intrusion cable. If the cable is
missing, the BMC logs a SEL event and sets the chassis intrusion status to the init-in-progress
state.
The BMC detects chassis intrusion and logs a SEL event when the system is in an on, sleep, or
standby state. Chassis intrusion is not detected when the system is in an AC power-off state.
5.7.3.2 Power Button
See Section 5.2.5.1.
5.7.3.3 Reset Button
An assertion of the Front Panel Reset signal to the BMC causes the system to start the reset
and reboot process, as long as the BMC has not locked-out this input. This assertion is
immediate and without the cooperation of software or the operating system.
See Section 5.4.3.
5.7.4

Front Panel Lock-out Operation

You can lock the front panel using the Set Front Panel Enables command. You can check the
front panel lock-out status using the Get chassis Status command.
Revision 1.3
System Status
Fatal alarm – system has failed or shutdown. Condition detected by
BMC.
CPU IERR signal asserted
CPU THERMTRIP
No power good – power fault
Power off
Intel order number E15331-006
Platform Management
Description
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