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| 型號： | Pentium II 266 |
| 廠商： | Intel Corp. |
| 英文描述： | 32-Bit Processor With Low-Power Module(帶低能量模塊的32位處理器) |
| 中文描述： | 32位處理器低功率模塊（帶低能量模塊的32位處理器） |
| 文件頁數(shù)： | 42/50頁 |
| 文件大?。?/td> | 1003K |
| 代理商： | PENTIUM II 266 |
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Pentium
II Processor – Low-Power Module
42
Datasheet
4.8.8
Currently Supported Clock States
Table 24 shows the low-power clock states supported by the Pentium II processor family product
line.
4.8.9
Operating System Implications of the Quick Start and Sleep States
There are a number of architectural features of the Pentium II Processor – Low Power that are not
available when the Quick Start state is enabled or do not function in the Quick Start or Sleep state
as they do in the Stop Grant state. These features are part of the APIC, time-stamp counter and
performance monitor counters.
The local APIC timer does not behave properly when the processor is in the Quick Start or Sleep
state. There is no guarantee that the local APIC timer will count down in the Quick Start or Sleep
state. If the timer counts down to zero when the processor is in or about to enter the Quick Start or
Sleep state, the processor’s behavior will be unpredictable. Inter-Processor Interrupts (IPIs) should
not be used in Pentium II processor – Low Power systems. If software generates an IPI just before
the processor enters the Quick Start or Sleep state, then a message on the APIC bus will be
generated. This would violate the requirement that no input signals toggle in the Quick Start or
Sleep state. Any software-generated IPI in a Pentium II Processor – Low Power system
(uniprocessor system) will always result in an error.
The time-stamp counter and the performance monitor counters are not guaranteed to count in the
Quick Start or Sleep states. If software sets the APIC interrupt enable bit of either of the
performance counters, then the resulting behavior will be unpredictable.
4.9
Typical POS/STR Power
The Module supports both power on suspend (POS) and suspend to RAM (STR) features. Typical
power during these states are:
These are average values of measurement on several typical modules and are guidelines only.
Table 24. Low-Power Clock States Supported by Processor
Processor
Clock State
Stop Grant
Auto Halt
Quick Start
Sleep
Deep Sleep
Pentium
Pro Processor
x
x
Pentium
II
Processor
x
x
x
x
Pentium
II
Processor – Low Power
x
x
x
x
x
Pentium
II
Processor – Low-Power
Module
x
x
x
State
Module Power
POS
910mW
STR
3mW
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