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參數(shù)資料
| 型號(hào)： | 30044-23 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | Low Power Integrated x86-Compatible with MMX Support 32-Bit Geode GXm Processor(低功耗集成兼容X86帶有MMX的32位 Geode GXm技術(shù)處理器) |
| 中文描述： | 32-BIT, 200 MHz, MICROPROCESSOR, CPGA320 |
| 封裝： | SPGA-320 |
| 文件頁(yè)數(shù)： | 8/244頁(yè) |
| 文件大?。?/td> | 4496K |
| 代理商： | 30044-23 |
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www.national.com
8
Revision 3.1
G
1.0
The National Semiconductor Geode GXm processor is
an x86-compatible 32-bit microprocessor. The decoupled
load/store unit (within the memory management unit)
allows multiple instructions in a single clock cycle. Other
features
include
single-cycle
instruction decode, 16 KB write-back cache, and clock
rates up to 266 MHz. These features are made possible
by the use of advanced-process technologies and super-
pipelining.
Architecture Overview
execution,
single-cycle
The GXm processor has low power consumption at all
clock frequencies. Where additional power savings are
required, designers can make use of Suspend mode, Stop
Clock capability, and System Management Mode (SMM).
The GXm processor is divided into major functional blocks
(as shown in Figure 1-1):
Integer Unit
Floating Point Unit (FPU)
Write-Back Cache Unit
Memory Management Unit (MMU)
Internal Bus Interface Unit
Integrated Functions
Instructions are executed in the integer unit and in the
floating point unit. The cache unit stores the most recently
used data and instructions and provides fast access to
this information for the integer and floating point units.
1.1
The integer unit consists of:
Instruction Buffer
Instruction Fetch
Instruction Decoder and Execution
INTEGER UNIT
The superpipelined integer unit fetches, decodes, and
executes x86 instructions through the use of a six-stage
integer pipeline.
The instruction fetch pipeline stage generates, from the
on-chip cache, a continuous high-speed instruction
stream for use by the processor. Up to 128 bits of code
are read during a single clock cycle.
Branch prediction logic within the prefetch unit generates
a predicted target address for unconditional or conditional
branch
instructions.
When
detected, the instruction fetch stage starts loading instruc-
tions at the predicted address within a single clock cycle.
Up to 48 bytes of code are queued prior to the instruction
decode stage.
a
branch
instruction
is
The instruction decode stage evaluates the code stream
provided by the instruction fetch stage and determines the
number of bytes in each instruction and the instruction
type. Instructions are processed and decoded at a maxi-
mum rate of one instruction per clock.
The address calculation function is super-pipelined and
contains two stages, AC1 and AC2. If the instruction
refers to a memory operand, AC1 calculates a linear
memory address for the instruction.
The AC2 stage performs any required memory manage-
ment
functions,
cache
accesses,
accesses. If a floating point instruction is detected by
AC2, the instruction is sent to the floating point unit for
processing.
and
register
file
The execution stage, under control of microcode, exe-
cutes instructions using the operands provided by the
address calculation stage.
Write-back
,
the last stage of the integer unit, updates the
register file within the integer unit or writes to the
load/store unit within the memory management unit.
Figure 1-1. Internal Block Diagram
Write-Back
Cache Unit
Unit
FPU
Internal Bus Interface Unit
Graphics
Pipeline
Memory
Controller
Display
Controller
PCI
SDRAM Port
CS5530
(CRT/LCD TFT)
PCI Bus
Integer
Integrated
Functions
MMU
X-Bus
Controller
C-Bus
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PDF描述 |
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| 30046-23 | Low Power Integrated x86-Compatible 32-Bit Geode GXLV Processor(低功耗集成兼容X86的32位 Geode GXLV技術(shù)處理器) |
| 300471U | Radial, -55dotc, long life wsitching-power |
| 300CNQ | SCHOTTKY RECTIFIER |
| 300CNQ035 | SCHOTTKY RECTIFIER |
| 300CNQ040 | SCHOTTKY RECTIFIER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 3004430 | 功能描述:DIN導(dǎo)軌式接線端子 UK 5-MTK RoHS:否 制造商:Phoenix Contact 類(lèi)型:Feed Through Modular Terminal Block 位置/觸點(diǎn)數(shù)量:1 線規(guī)量程:26-14 電流額定值:5 A, 15 A 電壓額定值:300 V, 600 V 安裝風(fēng)格: 端接類(lèi)型:Push-In |
| 30044-44L | 制造商:LENOX 功能描述:HOLE SAW BI-METAL 70MM |
| 3004472 | 制造商:Phoenix Contact 功能描述:UK 5-HESI (5X20) |
| 300448 | 功能描述:手工工具 RETAINING PIN RoHS:否 制造商:Molex 產(chǎn)品:Extraction Tools 類(lèi)型: 描述/功能:Extraction tool |
| 300449 | 制造商:MACOM 制造商全稱(chēng):Tyco Electronics 功能描述:HAND TOOL ASSEMBLY |
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