Enhanced-Processor - National Semiconductor

MediaGX™ MMX™-Enhanced Processor

Product Overview

Ju ne 1999

MediaGX™ MMX™-Enhanced Processor

Integrated x86 Solution with MMX Support

General Description

The MediaGX™ MMX™-Enhanced Processor is an

advanced 64-bit x86 compatible processor offering high

performance, fully accelerated 2D graphics, a 64-bit syn-

chronous DRAM controller and a PCI bus controller, all on

a single chip. Plus it is compatible with MMX™ technology.

The Medi aG X proc es so r core is a pro ven d esign that off e rs

competitive CPU performance. It has integer and floating

point execution units that are based on sixth-generation

technology. The integer core contains a single, six-stage

execution pipeline and offers advanced features such as

operand forwarding, branch target buffers, and extensive

write buffering. A 16 KB write-back L1 cache is accessed in

a unique fashion that eliminates pipeline stalls to fetch

operands that hit in the cache.

In addition to the advanced CPU features, the MediaGX

processor integrates a host of functions which are typically

implemented with external components. A full-function

graphics accelerator provides pixel processing and render-

ing functions.

A separate on-chip video buffer enables >30 fps MPEG1

video playb ack w he n use d together wi th the 553 0 I/O Com -

panion chip. Graphics and system memory accesses are

supported by a tightly-coupled synchronous DRAM

(SDRAM) memory controller. This tightly coupled memory

subsystem eliminates the need for an external L2 cache.

The MediaGX processor includes Virtual System Architec-

ture™ (VSA™ technology) enabling XpressGRAPHICS™

and XpressAUDIO™ subsystems as well as generic emu-

lation capabilities. Software handler routines for the

XpressGRAPHICS and XpressAUDIO subsystems can be

included in the BIOS and provide compatible VGA and 16-

bit industry standard audio emulation. XpressAUDIO tech-

nology eliminates much of the hardware traditionally asso-

ciated with audio functions.

Internal Block Diagram

Write-Back Unit FPU

Internal Bus Interface Unit

Graphics Memory Display PCI

SDRAM Port 5530 PCI Bus

Integer

Cache Unit

Integrated

Functions

MMU

(CRT/LCD TFT)

X-Bus

Pipeline Controller Controller Controller

C-Bus

National Semiconductor is a registered trademark and MediaGX, Virtual System Architecture, VSA, XpressAUDIO, and XpressGRAPHICS are trademarks of National Semiconductor

Corporation. MMX is a trademark of Intel Corporation.

www.national.com 2 Product Overview

Highlights (Continued)

Features

General Features

• Packaged in:

- 352-Terminal Ball Grid Array (BGA) or

- 320-Pin Staggered Pin Grid Array (SPGA)

• 0.35-micron four layer metal CMOS process

• Split rail design (3.3V I/O and 2.9V core)

64-Bit x86 Processor

• Supports the MMX™ instruction set extension for the

acce leration of multimedia app lic ations

• Speeds offered up to 300 MHz

• 16 KB unified L1 cache

• Integrated Floating Point Unit (FPU)

• Re-entrant System Management Mode (SMM)

enhanced for VSA

PCI Controller

• Fixed, rotating, hybrid, or ping-pong arbitration

• Supports up to three PCI bus masters

• Synchronous CPU and PCI bus clock frequency

• Supports concurrency between PCI master and L1

cache

Power Management

• Designed to support 5530 power management

architecture

• CPU only Suspend or full 3V Suspend supported:

- Clocks to CPU core stopped for CPU Suspend

- All on-chip clocks stopped for 3V Suspend

- Suspend refresh supported for 3V Suspend

Virtual Systems Architecture Technology

• Architecture allows OS independent (software) virtual-

ization of hardware functions

• Provi des c ompa tib le hi gh pe rf o rmance lega cy VGA core

functionality

Note: GUI (Graphical User Interface) graphics acceler-

ation is pure hardware.

• Provides 16-bit XpressAUDIO subsystem

2D Graphics Accelerator

• Graphics pipeline performance significantly increased

over previous generations by pipelining burst

reads/writes

• Accelerates BitBLTs, line draw, text

• Supports all 256 raster operations

• Supports transparent BLTs

• Runs at core clock frequency

• Full VGA and VESA mode support

• Special "Driver level” instructions utilize internal

scratchpad for enhanced performance

Display Contro ller

• Video Generator (VG) improves memory efficiency for

display refresh with SDRAM

• Suppo rts a separate MPEG1 v ide o buffer a nd data pat h

to enable video acceleration in the 5530

• Internal palette RAM for use with the 5530

• Direct interface to 5530 for CRT and TFT flat panel

support which eliminates need for external RAMDAC

• Hardware frame buffer compressor/decompressor

• Hardware cursor

• Suppo rts up to 1280x1024x 8 b pp and 1024x768x16 bpp

XpressRAM™ Subsystem

• Memory control/interface directly from CPU

• 64-Bit wide memory bus

• Support for:

- Two 168-pin unbuffered DIMMs

- Up to 16 open banks simultaneously

- Single or 16-byte reads (burst length of two)

Product Overview 3 ww w.national.com

Highlights (Continued)

System Designs

The system consists of two chips, the MediaGX MMX-

Enhanced Processor and the 5530 I/O Companion. The

system provides high performance using 64-bit x86 pro-

cessing. The two chips integrate video, audio and memory

interface functions normally performed by external hard-

ware.

The figure below shows a typical system block diagram. It

includes the 9210 Dual-Scan Flat Panel Display Controller

fo r designs that need to interface to a DSTN panel (instead

of a TFT panel).

System Block Diagram

YUV Port

(Video)

RGB P ort

PCI Inte rface

SDRAM

MD[63:0]

PCI Bus

I/O Companion

Graphics Data

Video Data

Analog RGB

Digital RGB (to TFT or DSTN Panel)

CRT

TFT

Panel

USB

(2 Ports)

AC97

CODEC

Speakers

ROM

Audio

Micro-

phone GPIO

Port

(Graphics)

MediaGX™

MMX™-Enhanced

Super

ISA Bus

SDRAM

Serial

Packet

Clocks Processor

I/O BIOS IDE

Devices

IDE Control

DC-DC & Battery

9210

DSTN

Controller

DSTN Panel

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DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL

SEMICONDUCTOR CORPORATION. As used herein:

1. Life suppo rt device s or systems ar e devic es or systems

which, (a) are intended for surgical implant into the

body, or (b) support or sustain life, and whose failure to

perform, when properly used in accordance with

instructions for use provided in the labeling, can be

reasonably expected to result in a significant injury to

the user.

2. A critical component is any component of a life support

device or system whose failure to perform can be

reasonably expected to cause the failure of the life

support device or system, or to affect its safety or

effectiveness.

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MediaGX™ MMX™-Enhanced Processor

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specification.