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Power Management
30 Datasheet
Notes:
1. Package C7 is not supported.
2. All package states are defined to be "E" states – such that the states always exit back into the LFM point
upon execution resume
3. The mapping of actions for PC3, and PC6 are suggestions – microcode will dynamically determine which
actions should be taken based on the desired exit latency parameters.
4. CC3/CC6 will all use a voltage below the VccMin operational point. The exact voltage selected will be a
function of the snoop and interrupt response time requirements made by the devices (PCIe* and DMI) and
the operating system.
Table 4-2. Package C-State Support
Package C-
State
Core
States
Limiting Factors
Retention and
PLL-Off
LLC
Fully
Flushed
Notes
1
PC0 – Active CC0 N/A No No 2
PC2 –
Snoopable
Idle
CC3–CC7
• PCIe/PCH and Remote Socket
Snoops
• PCIe/PCH and Remote Socket
Accesses
• Interrupt response time
requirement
• DMI Sidebands
• Configuration Constraints
VccMin
Freq = MinFreq
PLL = ON
No 2
PC3 – Light
Retention
at least
one Core
in C3
• Core C-State
• Snoop Response Time
• Interrupt Response Time
• Non Snoop Response Time
Vcc = retention
PLL = OFF
No 2, 3, 4
PC6 -
Deeper
Retention
CC6–CC7
• LLC ways open
• Snoop Response Time
• Non Snoop Response Time
• Interrupt Response Time
Vcc = retention
PLL = OFF
No 2, 3, 4
Table 4-3. Core C-State Support
Core C-State Global Clock PLL L1/L2 Cache Core VCC Context
CC0 Running On Coherent Active Maintained
CC1 Stopped On Coherent Active Maintained
CC1E Stopped On Coherent Request LFM Maintained
CC3 Stopped On Flushed to LLC Request Retention Maintained
CC6 Stopped Off Flushed to LLC Power Gate Flushed to LLC
CC7 Stopped Off Flushed to LLC Power Gate Flushed to LLC