Non-Ipmi Features; Power System - Intel X38ML - Server Board Motherboard Technical Manual

Platform Management
5.1.2

Non-IPMI Features

In-circuit BMC firmware update
Fault resilient booting (FRB): FRB2 is supported by the watchdog timer functionality
Chassis intrusion detection and chassis intrusion cable presence detection.
Basic fan control using TControl version 2 SDRs.
Acoustic management: Support for multiple fan profiles.
Signal testing support: The BMC provides test commands for setting and getting
platform signal states.
System GUID storage and retrieval.
Front panel management: The BMC controls the system status LED. It supports secure
lockout of certain front panel functionality and monitors button presses.
Power state retention.
Power fault analysis.
Power unit management: Support for power unit sensor. The BMC handles power-good
dropout conditions.
Address Resolution Protocol (ARP): The BMC sends and responds to ARP (supported
on embedded NICs).
Dynamic Host Configuration Protocol (DHCP): The BMC performs DHCP (supported on
embedded NICs).
Chassis intrusion fan interactions: Fans switch to high speed when the chassis intrusion
signal is asserted.
Platform environment control interface (PECI) thermal management support.
Simple Network Management Protocol (SNMP) v1, v2, and v3.
5.2

Power System

The Integrated BMC is in-line with the system power control path. This is implemented by an
integrated hardware signal pass-through. The pass-through allows the BMC to directly block
power-on if necessary. If the BMC firmware is non-functional, the default state of the pass-
through hardware is to allow full system control. This is to provide a means of power control in
case a BMC firmware recovery is necessary.
The following block diagram shows the power and reset signal interconnections to the BMC.
The signals names and interconnections may not match the names in schematics. These are
chosen to illustrate functional descriptions provided in this document.
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Intel order number E15331-006
Intel® Server Board X38ML
Revision 1.3