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Intel® Server Board SE7320SP2 & Intel Server Board SE7525GP2 TPS Platform Management
Revision 2.0
108
5.2 Onboard Platform Instrumentation Features and Functionality
5.2.1 Overview of mBMC
The National Semiconductor PC87431 management controller is an Application Specific
Integrated Circuit (ASIC) with many peripheral devices embedded into it. The mBMC contains
the logic needed for controlling the system, monitoring the sensors, and communicating with
other systems and devices via various external interfaces.
The following figure is a block diagram of the mBMC as it is used in a server management
system. The external interface blocks to the mBMC are the discrete hardware peripheral device
interface modules.
Figure 14: mBMC in a Server Management System
5.2.2 mBMC Self-test
The mBMC performs various tests as part of its initialization. If a failure is determined, the
mBMC stores the error internally. A failure may be caused by a corrupt mBMC FRU, SDR, or
SEL. The IPMI 1.5 Get Self Test Results command can be used to return the first error
detected.
Executing the Get Self Test Results command causes the mBMC self-test to be run. It is
strongly recommended to reset the mBMC via a server power cycle afterwards.
SMBus
mBMC ASIC
Bus Interface
Unit
SMBus
GPIO Pins
one SMBus
Interfaces
Flash
Memory
SIO
LAN on
Motherboard
(LOM)
Interface
General
purpose Output
and Digital
Input
Front Panel
and Power Stat
Signal
Private I2C
Buses
Processor
Interrupt Pins
SMBus
Sensor devices