GX1 Datasheet, PDF (3/247 Pages) National Semiconductor (TI) – Processor Series Low Power Integrated x86 Solution

Flexible Power Management

Supports a wide variety of standards:
— APM (Advanced Power Management) for Legacy
power management
— ACPI (Advanced Configuration and Power Interface)
for Windows power management
– Direct support for all standard processor (C0-C4)
states
— OnNOW design initiative compliant

Supports a wide variety of hardware and software
controlled modes:
— Active Idle (core-only stopped, display active)
— Standby (core and all integrated functions halted)
— Sleep (core and integrated functions halted and all
external clocks stopped)
— Suspend Modulation (automatic throttling of CPU
core via Geode I/O or graphics companion chip)
– Programmable duty cycle for optimal performance/
thermal balancing
— Several dedicated and programmable wake-up
events (via Geode I/O or graphics companion chip)
PCI Host Controller

Several arbitration schemes supported

Directly supports up to three PCI bus masters, more with
external logic

Synchronous to CPU core

Allows external PCI master accesses to main memory
concurrent with CPU accesses to L1 cache
Virtual Systems Architecture Technology

Innovative architecture allowing OS independent (soft-
ware) virtualization of hardware functions

Provides XpressGRAPHICS subsystem:
— High performance legacy VGA core compatibility
Note: The GUI acceleration is pure hardware.

Provides 16-bit XpressAUDIO subsystem:
— 16-bit stereo FM synthesis
— OPL3 emulation
— Supports MPU-401 MIDI interface
— Hardware assist provided via Geode I/O companion
chip

Additional hardware functions can be supported as
needed
2D Graphics Accelerator

Accelerates BitBLTs, line draw, text:
— Bresenham vector engine

Supports all 256 Raster Operations (ROPs)

Supports transparent BLTs and page flipping for
Microsoft’s DirectDraw

Runs at core clock frequency

Full VGA and VESA mode support

Special "driver level” instructions utilize internal
scratchpad for enhanced performance
Display Controller

Display Compression Technology (DCT) architecture
greatly reduces memory bandwidth consumption of
display refresh

Supports a separate video buffer and data path to
enable video acceleration in Geode I/O and graphics
companion chips

Internal palette RAM for gamma correction

Direct interface to Geode I/O and graphics companion
chips for CRT and TFT flat panel support eliminates the
need for an external RAMDAC

Hardware cursor

Supports up to 1280x1024x8 bpp and 1024x768x16 bpp
XpressRAM

SDRAM interface tightly coupled to CPU core and
graphics subsystem for maximum efficiency

64-Bit wide memory bus

Support for:
— Two 168-pin unbuffered DIMMs
— Up to 16 simultaneously open banks
— 16-byte reads (burst length of two)
— Up to 512 MB total memory supported
Diverse Operating System Support

Microsoft’s Windows 2000, Windows 95, Windows 98,
and Windows NT in non PC applications; along with
Windows CE and Windows NTE

WindRiver System’s VxWorks

QNX Software Systems’ QNX

Linux
Revision 1.0
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