GX1 datasheet(13/247 Pages) NSC

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Architecture Overview (Continued)

1.7

GEODE GX1/CS5530 SYSTEM DESIGNS

A GX1 processor and Geode CS5530 I/O companion

based design provides high performance using 32-bit x86

processing. The two chips integrate video, audio and mem-

ory interface functions normally performed by external

hardware. The CS5530 enables the full features of the GX1

processor with MMX support. These features include full

VGA and VESA video, 16-bit stereo sound, IDE interface,

ISA interface, SMM power management, and IBM’s AT

compatibility logic. In addition, the CS5530 provides an

Ultra DMA/33 interface, MPEG1 assist, and AC97 Version

2.0 compliant audio.

Figure 1-2 shows a basic block system diagram which also

includes the Geode CS9211 graphics companion for

designs that need to interface to a Dual Scan Super

Twisted Pneumatic (DSTN) panel (instead of a TFT panel).

Figure 1-3 shows an example of a CS9211 interface in a

typical GX1/CS5530 based system design. The CS9211

converts the digital RGB output of the CS5530 to the digital

output suitable for driving a color DSTN flat panel LCD. It

can drive all standard color DSTN flat panels up to a

1024x768 resolution.

Figures 1-4 and 1-5 show the signal connections between

the GX1 processor and the CS5530. For connections to the

CS9211, refer to the CS9211 data book.

Figure 1-2. Geode™ GX1/CS5530 System Block Diagram

YUV Port

(Video)

RGB Port

PCI Interface

SDRAM

MD[63:0]

3.3V PCI Bus

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)

Super

ISA Bus

SDRAM

Serial

Packet

Clocks

I/O

BIOS

IDE

Devices

14.31818

MHz Crystal

IDE Control

DC-DC & Battery

CS9211

Graphics

Companion

DSTN Panel

Geode™

CS5530

I/O Companion

Geode™

GX1

Processor

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