GXLV Datasheet, PDF (3/247 Pages) National Semiconductor (TI) – Geode™ GXLV Processor Series Low Power Integrated x86 Solutions

PCI Host Controller

Several arbitration schemes supported

Supports up to three PCI bus masters

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: Uses 2D Graphics Accelerator.

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 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 companion
devices

Internal palette RAM for gamma correction

Direct interface to Geode I/O companion devices 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 Subsystem

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 256 MB total memory supported
Diverse Operating System Support

Microsoft’s Windows 2000, 9X, NT, and CE

Sun Microsystems’ Java

WindRiver Systems’ VxWorks

QNX Software Systems’ QNX

Linux
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