Intel Z520PT CH80566EE014DT Ficha De Dados
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Códigos do produto
CH80566EE014DT
Low Power Features
20
Datasheet
2.1.1.4.1 Intel® Deep Power Down Technology State (Package C6 State)
When both threads have entered the C6 state and the L2 cache has been shrunk down
to zero ways, the processor will enter the Package Deep Power Down Technology
state. To do so, the processor saves its architectural states in the on-die SRAM that
resides in the V
CCP
domain. At this point, the core V
CC
will be dropped to the lowest
core voltage (closer to 0.3 V). The processor is now in an extremely low-power state.
While in this state, the processor does not need to be snooped as all the caches were
flushed before entering the C6 state.
The Deep Power Down Technology exit sequence is triggered by the chipset when it
detects a break event. It de-asserts the DPRSTP#, DPSLP#, SLP#, and STPCLK# pins
to return to C0. At DPSLP# de-assertion, the core V
CC
ramps up to the LFM value and
the processor starts up its internal PLLs. At SLP# de-assertion the processor is reset
and the architectural state is read back into the threads from an on-die SRAM.
exit sequences.
Figure 3. Deep Power Down Technology Entry Sequence
Thread 1
TC0
Thread 0
DPSLP#
assert
DPRSTP#
assert
SLP#
assert
STPCLK#
assert
State
Save
Level 6
I/O Read
State
Save
MWAIT C6
or Level 6
I/O Read
MWAIT C6
or Level 6
I/O Read
TC1
TC6
TC6
Package
C6
L2
Shrink
NOTE: Deep Power Down Technology is referred to as C6 in the above figure.
Figure 4. Deep Power Down Technology Exit Sequence
DPRST#
deassert
Package
C6
H/W
Reset
Ucode reset
and state
restore
(TC1)
TC0
DPSL#
deassert
SLP#
deassert
STPCLK#
deassert
TC0
Ucode reset
and state
restore
(TC0)