PC87431M/S/C mini-Baseboard Management Controller (mBMC)
November 2002
Revision 1.4
PC87431M/S/C
mini-Baseboard Management Controller (mBMC)
General Description
The National Semiconductor
廬
PC87431x family of mini-
Baseboard Management Controllers (mBMC) is a light ver-
sion of the IPMI v1.5 BMC. It is targeted for a wide range of
remote-controlled platforms such as servers, workstations,
hubs and printers.
The PC87431x incorporates an embedded microcontroller,
three System Management Bus (SMBus
廬
) interfaces, a
Chassis Management interface, Bi-color LED control, an in-
tegrated flash, Fan control, 12 ADC channels, and Digital
Input Event and General-Purpose Output pins.
The PC87431x interfaces with the host via a slave SMBus
interface; it interfaces with the LAN On Motherboard (LOM)
and with peripherals via two independent master SMBus in-
terfaces.
The PC87431x also supports distributed management archi-
tecture via the Intelligent Platform Management Bus (IPMB).
In addition, the PC87431x includes an inhibit strap to en-
able the system to work with the daughter board of an ad-
vanced BMC.
The PC87431x, like other members of National鈥檚 Advanced
I/O family, is PC01 and ACPI compliant
Outstanding Features
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Canned solution
LAN commands follow IPMI v1.5
MD5 secure authentication
Support for a variety of popular LOMs
Field Replaceable Unit (FRU)
Inventory
System Event Log (SEL)
Sensor Data Record (SDR) Repository
Platform Event Filtering (PEF)
Remote secure reset, Power On/Off
Remote settable BIOS boot options
BIOS Alerting interface
System health monitoring using SMBus-based sensors
LAN Alerting in PET format
Watchdog Timer
Host, LOM and Peripheral interfaces, via SMBus
Intelligent Platform Management Bus (PC87431C)
Digital Input Event pins and General-Purpose Output pins
Integrated Fan control and ADC (PC87431S/C)
Integrated 鏗俛sh, to reduce system cost
Two LEDs, with Bi-color LED control
Inhibit strap, to enable the system to work with the
daughter board of an advanced BMC
PC87431x System Connection Diagram
Host
RJ-45
SMBAlert
SMBus/IPMB
SMI NMI
10 MHz
V
CC
TRIS
LAN On
Motherboard
LOM SMBus
(LOM)
SMBAlert
PC87431x
mini-Baseboard Management
Controller
PWBTN
RSTOUT
Peripheral SMBus
PC87417
ServerI/O
General-Purpose LEDs Fans V
IN
Input Events
Sensor Devices
Output and Digital
=
Optional
Notes: IPMB interface is supported by PC87431C only.
Integrated ADC and Fan are supported by PC87431S/C only.
National Semiconductor is a registered trademark of National Semiconductor Corporation.
All other brand or product names are trademarks of their respective holders.
漏 2002 National Semiconductor Corporation
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