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参数资料
| 型号： | BXM80536GC2100F |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 2100 MHz, MICROPROCESSOR, CPGA478 |
| 封装： | FLIP CHIP, PGA-478 |
| 文件页数： | 5/84页 |
| 文件大小： | 1488K |
| 代理商： | BXM80536GC2100F |
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Datasheet
13
Low Power Features
2.1.5
Sleep State
A low power state in which the processor maintains its context, maintains the phase-locked loop
(PLL), and has stopped all internal clocks. The Sleep state can be entered only from Stop-Grant
state. Once in the Stop-Grant state, the processor will enter the Sleep state upon the assertion of the
SLP# signal. The SLP# pin should only be asserted when the processor is in the Stop Grant state.
SLP# assertions while the processor is not in the Stop-Grant state is out of specification and may
result in unapproved operation.
Snoop events that occur while in Sleep State or during a transition into or out of Sleep state will
cause unpredictable behavior.
In the Sleep state, the processor is incapable of responding to snoop transactions or latching
interrupt signals. No transitions or assertions of signals (with the exception of SLP#, DPSLP# or
RESET#) are allowed on the FSB while the processor is in Sleep state. Any transition on an input
signal before the processor has returned to Stop-Grant state will result in unpredictable behavior.
If RESET# is driven active while the processor is in the Sleep state, and held active as specified in
the RESET# pin specification, then the processor will reset itself, ignoring the transition through
Stop-Grant State. If RESET# is driven active while the processor is in the Sleep State, the SLP#
and STPCLK# signals should be deasserted immediately after RESET# is asserted to ensure the
processor correctly executes the reset sequence.
While in the Sleep state, the processor is capable of entering an even lower power state, the Deep
Sleep state by asserting the DPSLP# pin. (See Section 2.1.6.) While the processor is in the Sleep
state, the SLP# pin must be deasserted if another asynchronous FSB event needs to occur.
2.1.6
Deep Sleep State
Deep Sleep state is a very low power state the processor can enter while maintaining context. Deep
Sleep state is entered by asserting the DPSLP# pin while in the Sleep state. BCLK may be stopped
during the Deep Sleep state for additional platform level power savings.
BCLK stop/restart timings on 855PM and Intel 855GM chipset-based platforms are as follows:
Deep Sleep entry - DPSLP# and CPU_STP# are asserted simultaneously. The platform clock
chip will stop/tristate BCLK within 2 BCLKs +/- a few nanoseconds.
Deep Sleep exit - DPSLP# and CPU_STP# are deasserted simultaneously. The platform clock
chip will drive BCLK to differential DC levels within 2-3 ns and starts toggling BCLK 2-6
BCLK periods later.
To re-enter the Sleep state, the DPSLP# pin must be deasserted. BCLK can be restarted after
DPSLP# deassertion, as described above. A period of 30 microseconds (to allow for PLL
stabilization) must occur before the processor can be considered to be in the Sleep State. Once in
the Sleep state, the SLP# pin must be deasserted to re-enter the Stop-Grant state.
While in Deep Sleep state, the processor is incapable of responding to snoop transactions or
latching interrupt signals. No transitions of signals are allowed on the FSB while the processor is in
Deep Sleep state. Any transition on an input signal before the processor has returned to Stop-Grant
state will result in unpredictable behavior.
When the processor is in Deep Sleep state, it will not respond to interrupts or snoop transactions.
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