© 2003 National Semiconductor Corporation

www.national.com

April 2003

Revision 1.01

PC87435 Enhanced IPMI Baseboard Management Controller

General Description

integrated Enhanced IPMI Baseboard Management Controller

(BMC), or satellite management controller, with an embed-

ded RISC core and advanced functions. It is targeted for a

wide range of host-independent controlled platforms such

as servers and desktops.

CR16B core (a high-performance 16-bit RISC processor),

on-chip flash and RAM memories, system support func-

tions, Low Pin Count (LPC) host interface and a Bus Inter-

face Unit (BIU) that directly interfaces with optional

expansion memory and I/O devices.

high-accuracy analog-to-digital (ADC) for system control,

system health monitoring and analog controls, USART for

ICMB extension, Watchdog and other timers; interrupt con-

trol and general-purpose I/O (GPIO).

The PC87435 interfaces with the host via an LPC bus that

provides three interface channels, with peripherals and IPMI

devices via two independent SMBuses and with additional

memory and I/O ports via a private expansion bus.

The PC87435, like all members of National’s AdvancedI/O

family, is PC01 and ACPI compliant.

Outstanding Features

s

Intelligent Platform Management Interface (IPMI)-

optimized BMC

s

16-bit RISC core, with 2 Mbyte linear address space

and running at up to 20 MHz

s

On-chip flash and RAM

s

Host interface, based on Intel’s LPC Interface Specifi-

cation Revision 1.0, September 29th, 1997

s

Two SMBus interface modules (each module can be

master and slave)

s

USART for ICMB interface extension

s

System timers, PWM and ADC channels

s

84/108 GPIO ports with a variety of wake-up events

s

Random Number Generator for IPMI v1.5 authentication

s

Integrated RTC

s

Low current consumption

s

JTAG-based debugger interface

System Connection Diagram

PC87435

Baseboard

Management Controller

NIC

x86 Boot

Blocks

NV

SRAM

PC16550

UART

IPMB

32.768

SMI SCI

KHz

UART

GPIOs Wake-Up

Fan In

Fan Out

Temperature

Sensor

ICMB

South Bridge

PC87417

ServerI/O

RJ45

DS14185

XCVR

SEEPROM

LM87

LM85

Emergency

PCI

LPC

SERIRQ

SMBus 2

Management

Port

LM84

SMBus1

RS485

XCVR

ICMB

= Optional Component

Expansion Bus

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