Technical Product Specification

Table Of Contents
Server Management Intel
®
Server Board S5400SF TPS
Revision 2.02
Intel order number: D92944-007
64
Sleep
No boost conditions, system in ACPI S1 sleep state, and Integrated BMC configured to
transition fan domains to sleep state via the Set ACPI Configuration Mode command.
Nominal
It is possible to configure a fan domain’s nominal fan speed to be either static (fixed
value) or controlled by the state of one or more associated temperature sensors. OEM
SDR records are used to configure which temperature sensors are associated with
which fan control domains as well as the relationship (algorithm) between the
temperature and fan speed control (PWM) value. Multiple OEM SDRs may
reference/control the same fan control domain and multiple OEM SDRs may reference
the same temperature sensors. The PWM value for the given domain is computed using
one or more instances of a stepwise linear algorithm and a clamp algorithm. The
transition from one computed nominal fan speed (PWM value) to a new one is ramped
over time to minimize audible transitions. The ramp rate is configurable via the OEM
SDR.
For more information about fan management, refer to the Intel
®
5400 Series Server Board
Integrated Baseboard Management Controller Core External Product Specification.
4.7 Private Management I
2
C Buses
The Integrated BMC controls multiple private I
2
C buses. The Integrated BMC is the sole master
on these buses. External agents must use the Integrated BMC’s Master Write/Read I
2
C
command if they require direct communication with a device on any of these buses. In general,
only FRU devices are accessible in this manner. Sensor devices should not be directly
accessed by Integrated BMC clients.
4.8 Integrated BMC Messaging Interfaces
This section provides a high-level overview of some of the supported Integrated BMC
communication interfaces, which include the following:
Host SMS Interface via low pin count (LPC)/keyboard controller style (KCS) interface
Host SMM Interface via low pin count (LPC)/keyboard controller style (KCS) interface
Intelligent platform management bus (IPMB) I
2
C interface
PCI SMBus
Emergency management port (EMP) using the IPMI over Serial/Modem protocols for
serial remote access.
LAN interface using the IPMI-over-LAN protocols
Refer to the Intel
®
5400 Series Server Board Integrated Baseboard Management Controller
Core External Product Specification for more information.
4.8.1 LPC/KCS Interface
The Integrated BMC has three 8042 keyboard controller style (KCS) interface ports as
described in the IPMI Specification, Version 2.0. These interfaces are mapped into the host I/O
space and accessed via the chipset low pin count (LPC) bus.