PC87431M/S/C mini-Baseboard Management Controller (mBMC) General Description Outstanding Features ® The National Semiconductor PC87431x family of miniBaseboard Management Controllers (mBMC) is a light version 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®) interfaces, a Chassis Management interface, Bi-color LED control, an integrated 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 interfaces. The PC87431x also supports distributed management architecture via the Intelligent Platform Management Bus (IPMB). In addition, the PC87431x includes an inhibit strap to enable the system to work with the daughter board of an advanced BMC. The PC87431x, like other members of National’s Advanced I/O family, is PC01 and ACPI compliant ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 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 flash, 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 VCC TRIS SMBAlert LAN On Motherboard LOM SMBus (LOM) SMBAlert SMBus/IPMB SMI NMI 10 MHz PC87431x mini-Baseboard Management Controller Peripheral SMBus = Optional PC87417 ServerI/O General-Purpose LEDs Fans VIN Sensor Devices Output and Digital Input Events 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. © 2002 National Semiconductor Corporation PWBTN RSTOUT PC87431M/S/C mini-Baseboard Management Controller (mBMC) November 2002 Revision 1.4 PC87431x Device-Specific Information The following table shows the main features for the devices in the PC87431x family. Function PC87431M PC87431S PC87431C Remote Chassis Control ✔ ✔ ✔ Remote Boot Options ✔ ✔ ✔ LAN Configuration and Alerting ✔ ✔ ✔ System Health Monitoring ✔ ✔ ✔ System Event Log (SEL) ✔ ✔ ✔ Field Replaceable Unit (FRU) Inventory ✔ ✔ ✔ Platform Event Filtering ✔ ✔ ✔ Watchdog and FRB ✔ ✔ ✔ External Sensors Interface ✔ ✔ ✔ Internal Sensors: ADC Channels and Fan – ✔ ✔ MD5 MD5 MD5 – – ✔ Authentication IPMB support on host interface The package type is specified by two letters (L or T) that follow the part number: ● LLP package - PC87431xxx/L ● TSSOP package - PC87431xxx/T Features ■ Three SMBus 2.0 compatible Interfaces ■ System Chassis Control ■ Digital Input Events and General-Purpose Outputs Integrated ADC Channels and Fan Control (PC87431S/C) ■ 10-bit successive approximation Analog to Digital converter (up to 12 channels) IPMI and DMTF/ASF Support ■ Fan Speed Control for three fans ■ Supports Intelligent Platform Management Interface (IPMI) Specification v1.5 (revision 1.1), February 20, 2002 ■ Fan Speed Monitor for two fans ■ Supports LAN Alert sending as SNMP Trap in IPMI Platform Event Trap Format v1.0, December 7, 1998 ■ ■ Secure Authentication, based on RFC 1321, The MD5 Message-Digest Algorithm, R. Rivest, MIT Laboratory for Computer Science and RSA Data Security, Inc., April 1992 Internal E2PROM Stores the following: — Sensor access table — Sensor configuration table — Customizing table — 512 bytes for FRU Inventory or OEM data Host Interface Clocking, Supply and Package Information ■ Fault Resilient Booting (FRB) support with autonomous system reset, power cycling and CPU or BIOS switch. ■ Strap Input Controlled Operating Modes: — Inhibit mode ■ ■ Critical event alerting from system monitoring device on peripheral SMBus interface Clocks: — Single 10 MHz crystal oscillator ■ Power Supply: — Single supply operation: 4.7V - 5.5V ■ Package Options: — 48-pin TSSOP — 44-pin LLP Peripheral Interface ■ LMxx-like Sensors devices for system health monitoring ■ Supports PC874xx LPC SuperI/O for Servers and Workstations. www.national.com 2 Rev 1.4 PC87431x Physical Dimensions All dimensions are in millimeters 44-Pin Leadless Leadframe (LLP) Package Order Numbers PC87431Mxx/L, PC87431Sxx/L, PC87431Cxx/L NS Package Number LQA44A 48-Pin Plastic Thin Shrink Small Outline (TSSOP) Package Order Numbers PC87431Mxx/T, PC87431Sxx/T, PC87431Cxx/T NS Package Number MTD48 Rev 1.4 3 www.national.com PC87431M/S/C mini-Baseboard Management Controller (mBMC) LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. 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