Intel 2760QM FF8062701065300 Manuel D’Utilisation
Codes de produits
FF8062701065300
Datasheet, Volume 1
37
Power Management
4.2.6
Package C-State Power Specifications
Table 4-9
lists the processor package C-state power specifications for various processor
SKUs.
The C-state power specification is based on post-silicon validation results. The
processor case temperature is assumed at 50 °C for all C-states.
processor case temperature is assumed at 50 °C for all C-states.
4.3
System Memory Power Management
The DDR3 power states can be summarized as the following:
• Normal operation (highest power consumption)
• CKE Power-Down: Opportunistic, per rank control after idle time. There may be
• CKE Power-Down: Opportunistic, per rank control after idle time. There may be
different levels.
— Active Power-Down
— Precharge Power-Down with Fast Exit
— Precharge power Down with Slow Exit
— Precharge Power-Down with Fast Exit
— Precharge power Down with Slow Exit
• Self Refresh: In this mode no transaction is executed. The DDR consumes the
minimum possible power.
4.3.1
CKE Power-Down
The CKE input land is used to enter and exit different power-down modes. The memory
controller has a configurable activity timeout for each rank. When no reads are present
to a given rank for the configured interval, the memory controller will transition the
rank to power-down mode.
controller has a configurable activity timeout for each rank. When no reads are present
to a given rank for the configured interval, the memory controller will transition the
rank to power-down mode.
The memory controller transitions the DRAM to power-down by de-asserting CKE and
driving a NOP command. The memory controller will tri-state all DDR interface lands
except CKE (de-asserted) and ODT while in power-down. The memory controller will
transition the DRAM out of power-down state by synchronously asserting CKE and
driving a NOP command.
driving a NOP command. The memory controller will tri-state all DDR interface lands
except CKE (de-asserted) and ODT while in power-down. The memory controller will
transition the DRAM out of power-down state by synchronously asserting CKE and
driving a NOP command.
When CKE is off, the internal DDR clock is disabled and the DDR power is significantly
reduced.
reduced.
The DDR defines three levels of power-down:
• Active power-down: This mode is entered if there are open pages when CKE is de-
asserted. In this mode the open pages are retained. Existing this mode is 3–5 DCLK
cycles.
cycles.
• Precharge power-down fast exit: This mode is entered if all banks in DDR are
precharged when de-asserting CKE. Existing this mode is 3–5 DCLK cycles. The
difference from the active power-down mode is that when waking up, all page-
buffers are empty.
difference from the active power-down mode is that when waking up, all page-
buffers are empty.
• Precharge power-down slow exit: In this mode the data-in DLLs on DDR are off.
Existing this mode is 3–5 DCLK cycles until the first command is allowed, but about
16 cycles until first data is allowed.
16 cycles until first data is allowed.
Table 4-9.
Package C-State Power Specifications
TDP SKUs
C1E (W)
C3 (W)
C6 (W)
6-Core
130 W (6-core)
53
35
21
4-Core
130 W (4-core)
53
28
16