Mitsubishi Electric PH440 User manual

124577UG September 1998
MOTHERBOARD DIVISION
User Guide
PH440 NLX Motherboard
www.mitsubishi-motherboard.com

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Document History
Issue Description Date
1.0 Preliminary May 98
1.1 Update for production motherboards July 98
1.2 Style update, added installation and upgrade guides September 98
Trademarks mentioned within this document are the properties of their respective
owners. Details available on request.
Information contained in this document is subject to change without notice and does not
represent a commitment on the part of Mitsubishi Electric Motherboard Division.
No part of this manual may be reproduced or transmitted in any form or by any means
electronic or mechanical including photocopying and recording, for any purpose, without
the express written permission of the publishers.
Published by:
Mitsubishi Electric
Motherboard Division
3500 Parkside
Birmingham Business Park
Birmingham, England
B37 7YS

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SAFETY AND REGULATORY NOTICES
GENERAL
Battery This product contains a lithium battery.
Do not use a metal or other conductive implement to remove the battery. If a short-circuit is
made between its positive and negative terminals the battery may explode.
Replace a discharged battery with one of the same type; another type may explode or ignite.
Follow the instructions contained in the User Guide to replace the battery. Dispose of a
discharged battery promptly and in accordance with the battery manufacturer’s recommended
instructions. Do not recharge, disassemble or incinerate the discharged battery. Keep away from
children.
Anti-static precautions
Warning
Static electricity can cause permanent damage to electronic components. You should be
aware of this risk, and take precautions against the discharge of static electricity.
This product is at risk from static discharge because the electronic components of the
motherboard are exposed. Memory modules and replacement processors are examples of
electrostatic sensitive devices (ESSDs).
All work that involves contact with the PH440 NLX Motherboard should be done in an area
completely free of static electricity. We recommend using a Special Handling Area (SHA) as
defined by EN 100015-1: 1992. This means that working surfaces, floor coverings and chairs
must be connected to a common earth reference point, and you should wear an earthed wrist
strap and anti-static clothing. It is also a good idea to use an ionizer or humidifier to remove
static from the air.
Handle static-sensitive items with extreme care. Hold add-on components only by their edges,
avoiding their electrical contacts. In general, do not handle static-sensitive items unnecessarily.
Keep all conductive material, and food and drink, away from your work area and PH440 NLX
Motherboard.
LEGALITIES
This product complies with the relevant clauses of the following European Directives (and all
subsequent amendments):
Low Voltage Directive 73/23/EEC
EMC Directive 89/336/EEC
CE Marking Directive 93/68/EEC
Important
This product, when supplied, complies with the CE Marking Directive and its strict legal
requirements. Use only parts tested and approved by Mitsubishi Electric Motherboard
Division.

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STANDARDS
Safety
This product complies with the American Safety Standard UL1950.
Electro-magnetic Compatibility (EMC)
This product complies with the following European EMC standards:
Emissions EN50022 Class B
Immunity EN50082-1 Class B
This product also complies with the following American EMC standard:
FCC Class B
FCC Compliance Statement
Note: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
♦Reorient or relocate the receiving antenna.
♦Increase the separation between the equipment and receiver.
♦Connect the equipment into an outlet on a circuit different to that which the receiver is
connected.
♦Consult the dealer or an experienced radio/TV technician for help.
Important
You are cautioned that any change or modification to the product not expressly approved by
the manufacturer could void the approvals held by this product.

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CONTENTS
1 Overview 8
Motherboard Features......................................................................................................................9
Configuration Options ...................................................................................................................10
Build-time ................................................................................................................................10
User Configurable....................................................................................................................10
Block Diagram...............................................................................................................................11
2 Installation guide 12
3 Upgrading the motherboard 14
Adding more memory....................................................................................................................14
Fitting and removing DIMMs ..................................................................................................14
Fitting a DIMM........................................................................................................................15
Removing a DIMM..................................................................................................................15
Adding more video memory..........................................................................................................15
The processor assembly.................................................................................................................16
To fit a new processor..............................................................................................................17
Replacing the battery for the configuration CMOS.......................................................................18
4 Electronics 19
Processor........................................................................................................................................ 19
Core Logic.....................................................................................................................................19
Concurrency.............................................................................................................................20
Level 2 Cache ................................................................................................................................20
Memory .........................................................................................................................................20
Motherboard.............................................................................................................................20
DIMM ......................................................................................................................................20
BIOS ........................................................................................................................................20
Configuration RAM .................................................................................................................20
Video .............................................................................................................................................21
VGA Controller........................................................................................................................21
AGP..........................................................................................................................................22
Audio.............................................................................................................................................23
ESS Solo 1 ...............................................................................................................................23
Real Time Clock............................................................................................................................23
Standard I/O...................................................................................................................................24

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Keyboard and Mouse ...............................................................................................................24
Floppy Disk Interface...............................................................................................................24
Serial Ports...............................................................................................................................24
Parallel Port..............................................................................................................................24
Additional I/O................................................................................................................................24
IDE Disk Controller.................................................................................................................24
Universal Serial Bus (USB) ..................................................................................................... 24
Security..........................................................................................................................................24
Motherboard Power .......................................................................................................................25
Processor Power.......................................................................................................................25
Battery......................................................................................................................................25
Power Management .......................................................................................................................25
Standby Switch.........................................................................................................................25
Behaviour After AC-Disconnect..............................................................................................25
Sleep State Indication...............................................................................................................25
System Management......................................................................................................................26
Heceta II System Monitor........................................................................................................26
Fan Control....................................................................................................................................26
Expansion Slots .............................................................................................................................26
Industry Standard Architecture (ISA) ......................................................................................26
Peripheral Component Interconnect (PCI)...............................................................................26
Bus Resource Utilisation ...............................................................................................................27
ISA DMA Channels.................................................................................................................27
ISA Interrupts...........................................................................................................................27
PCI Interrupts...........................................................................................................................27
PCI Device Selection (motherboard devices)...........................................................................28
PCI Arbitration.........................................................................................................................28
5 BIOS Setup & POST 29
BIOS Setup....................................................................................................................................29
Control keys.............................................................................................................................29
Getting help in BIOS Setup......................................................................................................30
Reserving ISA legacy resources...............................................................................................30
Multi-boot facility..........................................................................................................................30
Power-on self-test..........................................................................................................................31
Recoverable POST errors.........................................................................................................31
Terminal POST errors and beep codes.....................................................................................32

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6 Electrical 39
Power Requirements......................................................................................................................39
PCB................................................................................................................................................39
7 Connector Assignments 40

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1 OVERVIEW
PH440 NLX is a Pentium II®processor-based NLX profile motherboard.
The design of PH440 NLX is based around the following components.
♦Intel Pentium II®processor in Slot 1.
♦Intel 440BX host bridge and system controller.
♦Intel PIIX4e ISA bridge and peripheral and power management controller.
♦SMSC 37C677 I/O Combo.
♦ATI AGP 3D Rage Pro AGP or 3D Rage IIC AGP video controller with SGRAM frame
buffer.
♦ESS Solo 1 audio controller.
Pentium II® Processor
The Pentium® II processor adds MMX technology to the P6 micro-architecture in a cartridge
package which also includes a second-level cache. The cartridge plugs into a 242-pin slot
connector (slot 1) on the motherboard and operates at speeds from 233MHz.
440BX North bridge
The 440BX North bridge connects the processor to the SDRAM main memory, an AGP port and
PCI bus interface. The device is housed in a 492-pin BGA package.
PIIX4e ISA bridge
The PIIX4e provides the PCI to ISA bus bridge and contains the system’s RTC, the IDE
interfaces, the DMA and Interrupt Controllers. The PIIX4e also provides ACPI support, an
SMbus controller and all the general purpose I/O ports used on the PH440 NLX motherboard.
The PIIX4e device is packaged in a 324 pin BGA.

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MOTHERBOARD FEATURES
Form factor NLX, 9.0" wide x 11.2" long
Processor Slot 1 with the VRM8.2 regulator on motherboard.
Accepts all Pentium II®(100MHz bus) processors
Core logic Intel 440BX & PIIX4e
Cache L2 cache included on processor module.
Memory –
RAM 3 DIMM sockets to accept 168 pin un-buffered PC100 SDRAM modules.
64-bit or 72-bit ECC with 1-bit correct, 2-bit detect.
Memory -
Flash ROM 2Mb flash ROM. Includes BIOS, Setup-in-ROM, VGA, USB, DMI, 120MB floppy etc.
Buses Supports 4 bus-master PCI slots and 5 ISA slots via riser.
VGA AGP video via ATI Rage IIc or ATI Rage Pro.
2 or 4MB SGRAM with upgrades via SODIMM module
Audio –
controller Active speaker support only (external). Internal mono speaker and PCB mounted ‘beeper’. ESS Solo 1 CODEC.
Hard Disk &
CD-ROM Dual UltraDMA33 interfaces for hard disk and CD-ROM.
Floppy Disk 720kB, 1.2MB (3-mode), 1.44MB 3½ drives, 1.2MB 5¼ drives.
Support for 120MB drives via ATA port.
Parallel Port IEEE 1284 (ECP & standard) on 25-way D-type
Serial Ports Dual 16550s. Two 9-way D-types on rear edge of motherboard.
USB Two ports. Two configurations available as build option. Either two ports
on rear panel or one on rear and second through NLX riser.
Keyboard &
Mouse PS/2-style connectors. USB with legacy support
Security Chassis intrusion detection via riser.
IR I/O Optional through NLX riser (input only).
Power
Management Green and deep green via system management mode.
ACPI compatible.
Requires logic-controlled PSU.
Standby option with wake-up on interrupt, serial port activity or button.
System
Management Hardware monitoring (Voltage, temperature and fan monitor) via Heceta II device.
Plug & Play PC97 and PC98 compliant
Battery back-
up On-board lithium coin cell with 5 years typical life.
PCB 4-layer NLX form-factor.
All components on top side

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CONFIGURATION OPTIONS
Build-time
The following items can be configurable at build-time and cannot be modified by the user.
♦Video controller (Rage IIc or Rage Pro).
♦Video memory and upgrade socket.
♦AMC connector.
♦MIDI & joystick header.
♦Heceta II system monitor.
♦+5V supply to VGA connector pin 9.
♦Dual rear USB or single rear and riser.
Contact Mitsubishi Electric Motherboard Division to determine available configurations.
User Configurable
The user can configure the following items.
♦Processor (Intel boxed products)
♦Main memory DIMMs
♦Video memory upgrade (where available)
♦Processor speed (core/bus ratio)
♦BIOS ROM write enable
♦Function enable/disable jumpers (audio CODEC, VGA)