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參數(shù)資料
| 型號(hào)： | pentium III CPU |
| 廠商： | Intel Corp. |
| 英文描述： | Pentium III Processor for the SC242 at 450MHz to 1.0GHz(SC242工作頻率450MHZ到1GHZ奔III處理器) |
| 中文描述： | 奔騰III處理器在450MHz至1.0GHz的（SC242工作頻率至450MHz到1GHz的奔三處理器的SC242） |
| 文件頁(yè)數(shù)： | 14/102頁(yè) |
| 文件大小： | 920K |
| 代理商： | PENTIUM III CPU |
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14
Datasheet
Pentium
III Processor for the SC242 at 450 MHz to 1.0 GHz
2.2
Clock Control and Low Power States
Pentium
III
processors allow the use of AutoHALT, Stop-Grant, Sleep, and Deep Sleep states to
reduce power consumption by stopping the clock to internal sections of the processor, depending
on each particular state. See
Figure 3
for a visual representation of the Pentium
III
processor low
power states.
Figure 2. AGTL+ Bus Topology
Pentium
III
Processor
Pentium III
Processor
ASIC
Figure 3. Stop Clock State Machine
PCB757a
2. Auto HALT Power Down State
BCLK running.
Snoops and interrupts allowed.
HALT Instruction and
HALT Bus Cycle Generated
INIT#, BINIT#, INTR,
SMI#, RESET#
1. Normal State
Normal execution.
STPCLK#
Asserted
STPCLK#
De-asserted
3. Stop Grant State
BCLK running.
Snoops and interrupts allowed.
SLP#
Asserted
SLP#
De-asserted
5. Sleep State
BCLK running.
No snoops or interrupts allowed.
BCLK
Input
Stopped
BCLK
Input
Restarted
6. Deep Sleep State
BCLK stopped.
No snoops or interrupts allowed.
4. HALT/Grant Snoop State
BCLK running.
Service snoops to caches.
Snoop Event Occurs
Snoop Event Serviced
Snoop
Event
Occurs
Snoop
Event
Serviced
STPCLK# Asserted
STPCLK# De-asserted
and Stop-Grant State
entered from
AutoHALT
,
NMI
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