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Details, datasheet, quote on part number:GX1-300P-85-2.0
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Datasheet text preview:
GeodeTM GX1 Processor Series Low Power Integrated x86 Solution
June 2002
GeodeTM GX1 Processor Series Low Power Integrated x86 Solution
General Description
The National Semiconductor® GeodeTM GX1 processor series is a line of integrated processors specifically designed to power information appliances for enter tainment, education, and business. Serving the needs of consumers and business professionals alike, it's the perfect solution for IA (information appliance) applications such as thin clients, interactive set-top boxes, and personal internet access devices. The Geode GX1 processor series is divided into three main categories as defined by the core operating voltage. Available with core voltages of 2.2V, 2.0V, and 1.8V, it offers extremely low typical power consumption (1.4W, 1.2W, and 0.8W, respectively) leading to longer battery life and enabling small form-factor, fanless designs. Typical power consumption is defined as an average, measured running Microsoft Windows at 80% Active Idle (Suspend-on-Halt) with a display resolution of 800x600x8 bpp at 75 Hz.
GeodeTM GX1 Processor Internal Block Diagram
Clock Module SYSCLK
SYSCLK multiplied by "A"
INT R Core Clocks X-Bus Clocks x86 Compatible Core INT/NMI TLB Integer Unit FP_Error Interrupt Control IRQ13 SMI#
Scratchpad
16 KB Unified L1 Ca che
(128)
Instruction Fetch
MMU Load/Store Floating Point Un it
C-Bus (64)
SUSP#
Core Suspend
SUSPA#
Power Management Control
Core Acknowledge X-Bus Suspend X-Bus Acknowledge X-Bus (32) Arbiter X-Bus Controller
Wr it e Buffers
Read Buffers
Arbiter
PCI Host Controller
2D Accelerator VGA BLT Engine ROP Unit
X-Bus CLK divide by "B"
Display Controller Compression Buffer Palette RAM Timing Generator
3 REQ/G NT Pairs
PCI Bus
4 SDRAM Clocks
64-bit SDRAM
RGB
Y UV
GeodeTM Graphics Companion Interface
National Semiconductor and Virtual System Architecture are registered trademarks of National Semiconductor Corporation. Geode, WebPAD, and VSA are trademarks of National Semiconductor Corporation. For a complete listing of National Semiconductor trademarks, please visit www.national.com/trademarks.
© 2002 National Semiconductor Corporation
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GeodeTM I/O Companion
GeodeTM GX1 Processor Series
While the x86 core provides maximum compatibility with the vast amount of Internet content available, the intelligent integration of several other functions, such as audio and graphics, offers a true system-level multimedia solution. The Geode GX1 processor core is a proven x86 design that offers competitive performance. It contains integer and floating point execution units based on sixth-generation technology. The integer core contains a single, five-stage execution pipeline and offers advanced features such as operand forwarding, branch target buffers, and extensive write buffering. Accesses to the 16 KB write-back L1 cache are dynamically reordered to eliminate pipeline stalls when fetching operands. In addition to the advanced CPU features, the GX1 processor integrates a host of functions typically implemented with external components. A full function graphics accelerator contains a VGA (video graphics array) controller, bitBLT engine, and a ROP (raster operations) unit for complete GUI (Graphical User Interface) acceleration under most operating systems. A display controller contains additional video buffering to enable >30 fps MPEG1 playback and video overlay when used with a National Semiconductor Geode I/O or graphics companion chip (e.g., CS5530A or CS9211). Graphics and system memory accesses are suppor ted by a tightly coupled SDRAM controller which eliminates the need for an external L2 cache. A PCI host controller suppor ts up to three bus masters for additional connectivity and multimedia capabilities. The GX1 processor also incorporates Virtual System Architecture® (VSATM) technology. VSA technology enables the XpressGRAPHICS and XpressAUDIO subsystems. Software handlers are available that provide full compatibility for industry standard VGA and 16-bit audio functions that are transparent at the operating system level. Together the National Semiconductor I/O companion and GX1 processor Geode devices provide a scalable, flexible, low-power, system-level solution well suited for a wide array of information appliances ranging from hand-held personal information access devices to digital set-top boxes and thin clients.
Features
General Features Packaging: -- 352-Terminal Ball Grid Array (BGA) or -- 320-Pin Staggered Pin Grid Array (SPGA) 0.18-micron four layer metal CMOS process Split rail design: -- Available 1.8V, 2.0V, or 2.2V core -- 3.3V I/O interface Fully static design Low typical power consumption: -- 0.8W @ 1.8V / 200 MHz -- 0.95W @ 1.8V / 233 MHz -- 1.0W @ 1.8V / 266 MHz -- 1.2W @ 2.0V / 300 MHz -- 1.4W @ 2.2V / 333 MHz Typical power consumption is defined as an average, measured running Windows at 80% Active Idle (Suspend-on-Halt) with a display resolution of 800x600x8 bpp @ 75 Hz.
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Note:
Speeds offered up to 333 MHz Unified Memory Architecture -- Frame buffer and video memory reside in main memory -- Minimizes printed circuit board (PCB) area requirements -- Reduces system cost Compatible with multiple Geode I/O companion devices provided by National Semiconductor
32-Bit x86 Processor Suppor ts Intel's MMX instruction set extension for the acceleration of multimedia applications 16 KB unified L1 cache Six-stage pipelined integer unit Integrated Floating Point Unit (FPU) Memory Management Unit (MMU) adheres to standard paging mechanisms and optimizes code fetch performance: -- Load-store reordering gives priority to memory reads -- Memory-read bypassing eliminates unnecessary or redundant memory reads Re-entrant System Management Mode (SMM) enhanced for VSA technology
Revision 4.1
GeodeTM GX1 Processor Series
Flexible Power Management Suppor ts a wide variety of standards: -- APM (Advanced Power Management) for Legacy power management -- ACPI (Advanced Configuration and Power Interface) for Windows power management Direct suppor t for all standard processor (C0-C4) states -- OnNOW design initiative compliant Suppor ts 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)
2D Graphics Accelerator Accelerates BitBLTs, line draw, text: -- Bresenham vector engine Suppor ts all 256 raster operations (ROPs) Suppor ts transparent BLTs and page flipping for Microsoft's DirectDraw Runs at core clock frequency Full VGA and VESA mode suppor t Special "driver level" instructions utilize internal scratchpad for enhanced performance
Several arbitration schemes suppor ted Directly suppor ts 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
Provides XpressGRAPHICS subsystem: -- High performance legacy VGA core compatibility The GUI acceleration is pure hardware.
Note:
Additional hardware functions can be suppor ted as needed
Revision 4.1
3
Provides 16-bit XpressAUDIO subsystem: -- 16-bit stereo FM synthesis -- OPL3 emulation -- Suppor ts MPU-401 MIDI interface -- Hardware assist provided via Geode I/O companion chip
Innovative architecture allowing OS independent (software) vir tualization of hardware functions
Virtual Systems Architecture Technology
PCI Host Controller
Display Controller Display Compression Technology (DCT) architecture greatly reduces memory bandwidth consumption of display refresh Suppor ts 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 suppor t eliminates the need for an external RAMDAC Hardware cursor Suppor ts up to 1280x1024x16 bpp
XpressRAM SDRAM interface tightly coupled to CPU core and graphics subsystem for maximum efficiency 64-Bit wide memory bus Suppor t 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 Be BeIA Linux Microsoft Windows 2000, Windows 95, Windows 98, and Windows NT in non PC applications; along with Windows CE and Windows NTE QNX Software Systems QNX WindRiver Systems VxWorks
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