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| 型號： | BX80552661 |
| 廠商： | INTEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 3600 MHz, MICROPROCESSOR, PBGA775 |
| 封裝： | FLIP CHIP, LGA-775 |
| 文件頁數(shù)： | 96/108頁 |
| 文件大?。?/td> | 3283K |
| 代理商： | BX80552661 |
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90
Datasheet
Features
6.2
Clock Control and Low Power States
The processor allows the use of AutoHALT and Stop-Grant states to reduce power consumption by
stopping the clock to internal sections of the processor, depending on each particular state. See
Figure 6-1 for a visual representation of the processor low power states.
6.2.1
Normal State
This is the normal operating state for the processor.
6.2.2
HALT and Enhanced HALT Powerdown States
The Pentium 4 processor supports the HALT or Enhanced HALT powerdown state. The Enhanced
HALT Powerdown state is configured and enabled via the BIOS. The Enhanced HALT state must
be enabled via the BIOS for the processor to remain within its specifications.
The Enhanced HALT state is a lower power state as compared to the Stop Grant State.
If Enhanced HALT is not enabled, the default Powerdown state entered will be HALT. Refer to the
following sections for details about the HALT and Enhanced HALT states.
Figure 6-1. Processor Low Power State Machine
Enhanced HALT or HALT State
BCLK running
Snoops and interrupts allowed
Normal State
Normal execution
Enhanced HALT Snoop or HALT
Snoop State
BCLK running
Service snoops to caches
Stop Grant State
BCLK running
Snoops and interrupts allowed
Snoop
Event
Occurs
Snoop
Event
Serviced
INIT#, BINIT#, INTR, NMI, SMI#,
RESET#, FSB interrupts
STPCLK#
Asserted
STPCLK#
De-asserted
S
TPCL
K
#
Asse
rted
STP
CL
K
#
D
e-
asse
rte
d
Snoop Event Occurs
Snoop Event Serviced
HALT or MWAIT Instruction and
HALT Bus Cycle Generated
Stop Grant Snoop State
BCLK running
Service snoops to caches
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相關(guān)代理商/技術(shù)參數(shù) |
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| BX80552661T2 | 制造商:Intel 功能描述:P4 661 3.6GHZ LP-BTX 2MB - Boxed Product (Development Kits) |
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| BX80553915R S L9DA | 制造商:Intel 功能描述: |
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