GXLV Datasheet, PDF (13/247 Pages) National Semiconductor (TI) – Geode™ GXLV Processor Series Low Power Integrated x86 Solutions

Architecture Overview (Continued)
1.7 GEODE GXLV/CS5530 SYSTEM DESIGNS
A GXLV processor and Geode CS5530 I/O companion
based design provides high performance using 32-bit x86
processing. The two chips integrate video, audio and
memory interface functions normally performed by exter-
nal hardware. The CS5530 enables the full features of the
GXLV 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 CS9210 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 CS9210 interface in a
typical GXLV/CS5530 based system design. The CS9210
converts the digital RGB output of the CS5530 to the digi-
tal 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 GXLV processor and the CS5530. For connections to
the CS9210, refer to the CS9210 data book.
SDRAM
USB
(2 Ports)
MD[63:0]
Clocks
Speakers
CD
ROM
Audio
AC97
Codec
Geode™
CS5530
I/O Companion
Micro-
phone
GPIO
14.31818
MHz Crystal
SDRAM
Port
YUV Port
(Video)
Geode™
GXLV
Processor
Serial
Packet
RGB Port
(Graphics)
PCI Interface
CRT
PCI Bus
Graphics Data
Video Data
Analog RGB
Digital RGB (to TFT or DSTN Panel)
TFT
Panel
IDE Control
Super
I/O
BIOS
IDE
Devices
Geode™
CS9210
Graphics
Companion
DC-DC & Battery
ISA Bus
DSTN Panel
Figure 1-2. Geode™ GXLV/CS5530 System Block Diagram
Revision 1.1
13
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