GX1 Datasheet, PDF (13/247 Pages) National Semiconductor (TI) – Processor Series Low Power Integrated x86 Solution

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.
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™
GX1
Processor
Serial
Packet
RGB Port
(Graphics)
PCI Interface
CRT
3.3V 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™
CS9211
Graphics
Companion
DC-DC & Battery
ISA Bus
DSTN Panel
Figure 1-2. Geode™ GX1/CS5530 System Block Diagram
Revision 1.0
13
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