參數(shù)資料
型號: pentium II cpu
廠商: Intel Corp.
英文描述: Pentium II Processor AT 450MHZ(工作頻率450兆赫茲奔II處理器)
中文描述: 奔騰II處理器在450MHz(工作頻率450兆赫茲奔二處理器)
文件頁數(shù): 11/84頁
文件大小: 1092K
代理商: PENTIUM II CPU
Pentium
II Processor at 350 MHz, 400 MHz, and 450 MHz
Datasheet
11
2.2
Clock Control and Low Power States
Pentium II 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 II processor low
power states.
Figure 2. AGTL+ Bus Topology
Pentium
II
Processor
ASIC
Pentium II
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
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