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參數(shù)資料
| 型號： | BX805573060 |
| 廠商： | INTEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 64-BIT, 2400 MHz, MICROPROCESSOR, CBGA775 |
| 封裝： | LGA-775 |
| 文件頁數(shù)： | 90/102頁 |
| 文件大?。?/td> | 2428K |
| 代理商： | BX805573060 |
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Features
88
Dual-Core Intel Xeon Processor 3000 Series Datasheet
6.2.1
Normal State
This is the normal operating state for the processor.
6.2.2
HALT and Extended HALT Powerdown States
The processor supports the HALT or Extended HALT powerdown state. The Extended
HALT Powerdown must be enabled via the BIOS for the processor to remain within its
specification.
The Extended HALT state is a lower power state as compared to the Stop Grant State.
If Extended HALT is not enabled, the default Powerdown state entered will be HALT.
Refer to the following sections for details about the HALT and Extended HALT states.
6.2.2.1
HALT Powerdown State
HALT is a low power state entered when all the processor cores have executed the HALT
or MWAIT instructions. When one of the processor cores executes the HALT instruction,
that processor core is halted; however, the other processor continues normal operation.
The processor transitions to the Normal state upon the occurrence of SMI#, INIT#, or
LINT[1:0] (NMI, INTR). RESET# causes the processor to immediately initialize itself.
The return from a System Management Interrupt (SMI) handler can be to either
Normal Mode or the HALT Power Down state. See the IA-32 Intel Architecture
Software Developer's Manual Volume 3: System Programmer's Guide for more
information.
Figure 6-1. Processor Low Power State Machine
Normal State
- Normal Execution
Stop Grant State
- BCLK running
- Snoops and interrupts
allowed
Stop Grant Snoop State
- BCLK running
- Service Snoops to cahces
Extended HALT Snoop or
HALT Snoop State
- BCLK running
- Service Snoops to cahces
Extended HALT or HALT
State
- BCLK running
- Snoops and interrupts
allowed
HALT or MWAIT Instruction and
HALT Bus Cycle Generated
INIT#, BINIT#, INTR, NMI, SMI#,
RESET#, FSB interrupts
STPCLK#
Asserted
STPCLK#
De-asserted
STPCLK#
Asserted
STPCLK#
De-asserted
Snoop
Event
Occurs
Snoop
Event
Serviced
Snoop Event Occurs
Snoop Event Serviced
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