30040-23

更新时间： 2024-02-21 10:37:30

品牌	Logo	应用领域
美国国家半导体 - NSC		微控制器和处理器外围集成电路微处理器
页数	文件大小	规格书
244页	4221K
描述
Geode⑩ GXm Processor Integrated x86 Solution with MMX Support

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30040-23 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	SPGA, SPGA320,37X37	Reach Compliance Code：	unknown
风险等级：	5.91	Is Samacsys：	N
其他特性：	ALSO REQUIRES 3.3V SUPPLY	地址总线宽度：	32
位大小：	32	边界扫描：	YES
外部数据总线宽度：	32	格式：	FLOATING POINT
集成缓存：	YES	JESD-30 代码：	S-CPGA-P320
JESD-609代码：	e0	长度：	49.595 mm
低功率模式：	YES	端子数量：	320
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	CERAMIC, METAL-SEALED COFIRED	封装代码：	SPGA
封装等效代码：	SPGA320,37X37	封装形状：	SQUARE
封装形式：	GRID ARRAY, SHRINK PITCH	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	2.9,3.3 V	认证状态：	Not Qualified
座面最大高度：	3.07 mm	速度：	200 MHz
子类别：	Microprocessors	最大压摆率：	2550 mA
最大供电电压：	3.05 V	最小供电电压：	2.75 V
标称供电电压：	2.9 V	表面贴装：	NO
技术：	CMOS	温度等级：	COMMERCIAL
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	PIN/PEG
端子节距：	1.27 mm	端子位置：	PERPENDICULAR
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	49.595 mm
uPs/uCs/外围集成电路类型：	MICROPROCESSOR	Base Number Matches：	1

30040-23 数据手册

April 2000

Geode™ GXm Processor

Integrated x86 Solution with MMX Support

General Description

The National Semiconductor^®Geode™ GXm processor

is an advanced 32-bit x86 compatible processor offering

high performance, fully accelerated 2D graphics, a 64-bit

synchronous DRAM controller and a PCI bus controller,

all on a single chip that is compatible with Intel’s MMX

technology.

graphics accelerator provides pixel processing and ren-

dering functions.

A separate on-chip video buffer enables >30 fps MPEG1

video playback when used together with the CS5530 I/O

companion chip. Graphics and system memory accesses

are supported by a tightly-coupled synchronous DRAM

(SDRAM) memory controller. This tightly coupled memory

subsystem eliminates the need for an external L2 cache.

The GXm processor core is a proven design that offers

competitive CPU performance. It has integer and floating

point execution units that are based on sixth-generation

technology. The integer core contains a single, six-stage

execution pipeline and offers advanced features such as

operand forwarding, branch target buffers, and extensive

write buffering. A 16 KB write-back L1 cache is accessed

in a unique fashion that eliminates pipeline stalls to fetch

operands that hit in the cache.

The GXm processor includes Virtual System Architec-

ture^®(VSA™ technology) enabling XpressGRAPHICS

and XpressAUDIO subsystems as well as generic emula-

tion capabilities. Software handler routines for the Xpress-

GRAPHICS and XpressAUDIO subsystems can be

included in the BIOS and provide compatible VGA and 16-

bit industry standard audio emulation. XpressAUDIO tech-

nology eliminates much of the hardware traditionally asso-

ciated with audio functions.

In addition to the advanced CPU features, the GXm pro-

cessor integrates a host of functions which are typically

implemented with external components. A full-function

Geode™ GXm Processor Internal Block Diagram

Write-Back

Cache Unit

Integer

Unit

FPU

MMU

C-Bus

Internal Bus Interface Unit

X-Bus

Graphics

Pipeline

Memory

Controller

Display

Controller

PCI

Controller

Integrated

Functions

PCI Bus

SDRAM Port

CS5530

(CRT/LCD TFT)

National Semiconductor and Virtual System Architecture are registered trademarks of National Semiconductor Corporation.

Geode and VSA are trademarks of National Semiconductor Corporation.

For a complete listing of National Semiconductor trademarks, please visit www.national.com/trademarks.

www.national.com

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