GXM Datasheet, PDF (11/244 Pages) National Semiconductor (TI) – Geode™ GXm Processor Integrated x86 Solution with MMX Support

Architecture Overview (Continued)
1.6 GEODE GXM/CS5530 SYSTEM DESIGNS
The GXm Integrated Subsystem with MMX support con-
sists of two chips, the GXm Processor and the CS5530
I/O companion. The subsystem provides high perfor-
mance using 32-bit x86 processing. The two chips inte-
grate video, audio and memory interface functions
normally performed by external hardware.
As described in separate manuals, the CS5530 enables
the full features of the GXm processor with MMX support.
These features include full VGA and VESA video, 16-bit
stereo sound, IDE interface, ISA interface, SMM power
management, and AT compatibility logic. In addition, the
newer CS5530 provides an Ultra DMA/33 interface,
MPEG2 assist, and AC97 Version 2.0 compliant audio.
Figure 1-2 shows a basic block system diagram (refer to
Figure 2-4 on page 34 for detailed subsystem intercon-
nection signals). It includes the National Semiconductor
CS9210 Dual-Scan Flat Panel Display Controller for
designs that need to interface to a DSTN panel (instead of
TFT panel).
SDRAM
USB
(2 Ports)
Speakers
CD
ROM
Audio
AC97
Codec
Micro-
phone
GPIO
MD[63:0]
SDRAM
Port
YUV Port
(Video)
Clocks
System
Clocks
Geode™ CS5530
I/O Companion
Geode™ GXm
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
14.31818
MHz Crystal
Super
I/O
BIOS
IDE
Devices
Geode™
CS9210
DSTN
Controller
DC-DC & Battery
ISA Bus
DSTN Panel
Figure 1-2. Geode™ GXm/CS5530 System Block Diagram
Revision 3.1
11
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