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250686-007 参数 Datasheet PDF下载

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型号: 250686-007
PDF下载: 下载PDF文件 查看货源
内容描述: 移动式英特尔奔腾4处理器-M [Mobile Intel Pentium4 Processor-M]
分类和应用:
文件页数/大小: 97 页 / 4754 K
品牌: INTEL [ INTEL ]
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Introduction  
1.  
Introduction  
The Mobile Intel Pentium 4 Processor-M is the first Intel mobile processor with the Intel  
NetBurstTM micro-architecture. The Mobile Intel Pentium 4 Processor-M utilizes a 478-pin, Micro  
Flip-Chip Pin Grid Array (Micro-FCPGA) package, and plugs into a surface-mount, Zero Insertion  
Force (ZIF) socket. The Mobile Intel Pentium 4 Processor-M maintains full compatibility with IA-  
32 software. In this document the Mobile Intel Pentium 4 Processor-M will be referred to as the  
“Mobile Intel Pentium 4 Processor-M” or simply “the processor.”  
The Intel NetBurst micro-architecture features include hyper-pipelined technology, a rapid  
execution engine, a 400-MHz system bus, and an execution trace cache. The hyper pipelined  
technology doubles the pipeline depth in the Mobile Intel Pentium 4 Processor-M allowing the  
processor to reach much higher core frequencies. The rapid execution engine allows the two  
integer ALUs in the processor to run at twice the core frequency, which allows many integer  
instructions to execute in 1/2 clock tick. The 400-MHz system bus is a quad-pumped bus running  
off a 100-MHz system clock making 3.2 GB/sec data transfer rates possible. The execution trace  
cache is a first level cache that stores approximately 12-k decoded micro-operations, which  
removes the instruction decoding logic from the main execution path, thereby increasing  
performance.  
Additional features within the Intel NetBurst micro-architecture include advanced dynamic  
execution, advanced transfer cache, enhanced floating point and multi-media unit, and Streaming  
SIMD Extensions 2 (SSE2). The advanced dynamic execution improves speculative execution and  
branch prediction internal to the processor. The advanced transfer cache is a 512 kB, on-die level 2  
(L2) cache. A new floating point and multi media unit has been implemented which provides  
superior performance for multi-media and mathematically intensive applications. Finally, SSE2  
adds 144 new instructions for double-precision floating point, SIMD integer, and memory  
management. Power management capabilities such as AutoHALT, Stop-Grant, Sleep, Deep Sleep,  
and Deeper Sleep have been incorporated. The processor includes an address bus powerdown  
capability which removes power from the address and data pins when the system bus is not in use.  
This feature is always enabled on the processor.  
The Streaming SIMD Extensions 2 (SSE2) enable break-through levels of performance in  
multimedia applications including 3-D graphics, video decoding/encoding, and speech recognition.  
The new packed double-precision floating-point instructions enhance performance for applications  
that require greater range and precision, including scientific and engineering applications and  
advanced 3-D geometry techniques, such as ray tracing.  
The Mobile Intel Pentium 4 Processor-M’s 400-MHz Intel NetBurst micro-architecture system bus  
utilizes a split-transaction, deferred reply protocol like the Intel Pentium 4 Processor. This system  
bus is not compatible with the P6 processor family bus. The 400-MHz Intel NetBurst micro-  
architecture system bus uses Source-Synchronous Transfer (SST) of address and data to improve  
performance by transferring data four times per bus clock (4X data transfer rate, as in AGP 4X).  
Along with the 4X data bus, the address bus can deliver addresses two times per bus clock and is  
referred to as a “double-clocked” or 2X address bus. Working together, the 4X data bus and 2X  
address bus provide a data bus bandwidth of up to 3.2 Gbytes/second.  
The processor, when used in conjunction with the requisite Intel SpeedStep technology applet or  
its equivalent, supports Enhanced Intel SpeedStep technology, which enables real-time dynamic  
switching of the voltage and frequency between two performance modes. This occurs by switching  
the bus ratios, core operating voltage, and core processor speeds without resetting the system.  
Mobile Intel Pentium 4 Processor-M Datasheet  
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