Technical Product Specification

Intel
®
Server Board S5500BC TPS Platform Management
Revision 1.8 Intel order number: E42249-009 53
At system startup, the ME may query the BMC for the following information using IPMI OEM
commands:
Inlet air temperature reading  This corresponds to the temperature reading from the Front
Panel Ambient Temperature sensor. Some platforms may not support this feature. Refer to the
applicable platform appendix.
4.4.6 ACPI Mode Notification
The BIOS notifies the BMC when the system enters and exits ACPI mode. The BMC, in turn,
notifies the ME. The NM power-limiting functionality is only available when the system is
operating in ACPI mode (an ACPI-compliant operating system is running).
4.4.7 Persistence Across Boots
Data passed to the ME will persist across boots, but will not persist across AC power loss.
4.5 Power Management Bus (PMBUS)
The BMC firmware implements power-management features based on the Power Management
Bus (PMBus) 1.1 Specification. The following sensor types are supported for systems that
contain PMBus-compliant power supplies and a PMBus-compliant power distribution board.
 Power Supply Input Power Sensor
 Power Supply Output Current Sensor
 Power Supply Temperature Sensor