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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)： | 12/84頁 |
| 文件大?。?/td> | 1092K |
| 代理商： | PENTIUM II CPU |
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Pentium
II Processor at 350 MHz, 400 MHz, and 450 MHz
12
Datasheet
For the processor to fully realize the low current consumption of the Stop-Grant, Sleep, and Deep
Sleep states, a Model Specific Register (MSR) bit must be set. For the MSR at 02AH (Hex), bit 26
must be set to a ‘1’ (this is the power on default setting) for the processor to stop all internal clocks
during these modes. For more information, see the
Pentium
II Processor Developer's Manual
(Order Number 243502).
Due to the inability of processors to recognize bus transactions during the Sleep and Deep Sleep
states, two-way MP systems are not allowed to have one processor in Sleep/Deep Sleep state and
the other processor in Normal or Stop-Grant state simultaneously.
2.2.1
Normal State—State 1
This is the normal operating state for the processor.
2.2.2
AutoHALT Powerdown State—State 2
AutoHALT is a low power state entered when the processor executes the HALT instruction. The
processor will transition to the Normal state upon the occurrence of SMI#, BINIT#, INIT#, or
LINT[1:0] (NMI, INTR). RESET# will cause the processor to immediately initialize itself.
The return from a System Management Interrupt (SMI) handler can be to either Normal Mode or
the AutoHALT Power Down state. See the
Intel Architecture Software Developer's Manual,
Volume III: System Programmer's Guide
(Order Number 243192) for more information.
FLUSH# will be serviced during the AutoHALT state, and the procesor will return to the
AutoHALT state.
The system can generate a STPCLK# while the processor is in the AutoHALT Power Down state.
When the system deasserts the STPCLK# interrupt, the processor will return execution to the
HALT state.
2.2.3
Stop-Grant State—State 3
The Stop-Grant state on the processor is entered when the STPCLK# signal is asserted.
Since the AGTL+ signal pins receive power from the system bus, these pins should not be driven
(allowing the level to return to V
TT
) for minimum power drawn by the termination resistors in this
state. In addition, all other input pins on the system bus should be driven to the inactive state.
BINIT# will be recognized while the processor is in Stop-Grant state. If STPCLK# is still asserted
at the completion of the BINIT# bus initialization, the processor will remain in Stop-Grant mode. If
the STPCLK# is not asserted at the completion of the BINIT# bus initialization, the processor will
return to Normal state.
FLUSH# will not be serviced during Stop-Grant state.
RESET# will cause the processor to immediately initialize itself, but the processor will stay in
Stop-Grant state. A transition back to the Normal state will occur with the deassertion of the
STPCLK# signal.
A transition to the HALT/Grant Snoop state will occur when the processor detects a snoop on the
system bus (see
Section 2.2.4
). A transition to the Sleep state (see
Section 2.2.5
) will occur with the
assertion of the SLP# signal.
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