CS5530 Datasheet, PDF (1/241 Pages) National Semiconductor (TI) – Geode™ CS5530 I/O Companion Multi-Function South Bridge

April 2000
Geode™ CS5530 I/O Companion
Multi-Function South Bridge
General Description
The CS5530 I/O companion is designed to work in con-
junction with the GXLV and GXm series processors; all
members of the National Semiconductor^® Geode™ family
of products. Together the Geode processor and CS5530
provide a system-level solution well suited for the high
performance needs of a host of devices such as digital
set-top boxes and thin client devices. Due to the low
power consumption of a GXLV processor, this solution
satisfies the needs of battery powered devices such as
National’s WebPAD™ system, a Geode GXLV proces-
sor/CS5530 based design. Also, thermal design is eased
allowing for fanless system design.
The CS5530 I/O companion is a PCI-to-ISA bridge (South
Bridge), ACPI-compliant chipset that provides AT/ISA
style functionality. To those familiar with PC architecture
this enables a quicker understanding of the CS5530’s
architecture. The device contains state-of-the-art power
management that enables systems, especially battery
powered systems, to significantly reduce power consump-
tion.
Audio is supported through PCI bus master engines which
connect to an AC97 compatible codec such as the
National Semiconductor LM4548. If industry standard
audio is required, a combination of hardware and software
called Virtual System Architecture^® (VSA™) technology is
provided.
The GXLV processor’s graphics/video output is connected
to the CS5530. The CS5530 graphics/video support
includes a PLL that generates the DOT clock for the GXLV
processor (where the graphics controller is located), video
acceleration hardware, gamma RAM plus three DACs for
RGB output to CRT, and digital RGB that can be directly
connected to TFT panels or NTSC/PAL encoders. The
digital RGB output can also be connected to the National
Semiconductor CS9210 Graphics Companion (a DSTN
Controller) for DSTN panel support. The CS9210 is also a
member of the Geode product family.
Geode™ CS5530 Internal Block Diagram
PCI Bus
USB
GPIOs
GPCS
PCI to USB Macro
Pwr Mgmt, Traps,
Events, and Timers
PCI to X-Bus / X-Bus to PCI Bridge
X-Bus
CS5530 Support
PCI Configuration
Registers
Active Decode
Address Mapper
X-Bus Arbiter
Graphics
and Video
from CPU
Display
Display Interface
MPEG, DOT Clock
CSC and SCL
RGB/FP Interface
Geode™ CS9210
Graphics Companion
AT Compatibility Logic
ISA Bus Interface
AT Ports, ISA Megacells
Ultra DMA/33
IDE
Interface
Joystick
Joystick / Game Port
ISA Bus
IDE
PC97317 SIO
Audio/Codec/MPU
Interface
AC97 Codec
(e.g., LM4548)
National Semiconductor and Virtual System Architecture are registered trademarks of National Semiconductor Corporation.
Geode, VSA, and WebPAD are trademarks of National Semiconductor Corporation.
For a complete listing of National Semiconductor trademarks, please visit www.national.com/trademarks.
© 2000 National Semiconductor Corporation
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