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.
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).
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
MD[63:0]
SDRAM
Port
YUV Port
(Video)
SDRAM
Geode™ GXm
Processor
Clocks
Serial
Packet
RGB Port
(Graphics)
CRT
USB
(2 Ports)
PCI Interface
System
Clocks
PCI Bus
TFT
Panel
Speakers
Graphics Data
Video Data
Analog RGB
CD
ROM
Audio
Geode™ CS5530
I/O Companion
AC97
Codec
Digital RGB (to TFT or DSTN Panel)
IDE Control
Geode™
CS9210
DSTN
Micro-
phone
Super
I/O
IDE
Devices
BIOS
14.31818
MHz Crystal
Controller
GPIO
ISA Bus
DC-DC & Battery
DSTN Panel
Figure 1-2. Geode™ GXm/CS5530 System Block Diagram
Revision 3.1
11
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