Intel E3815 FH8065301567411 Data Sheet
Product codes
FH8065301567411
Power Management
Intel
®
Atom™ Processor E3800 Product Family
84
Datasheet
•
Memory is held in self-refresh and the memory interface is disabled, except the
CKE pin as it is powered from the memory voltage rail. CKE is driven low.
CKE pin as it is powered from the memory voltage rail. CKE is driven low.
6.2.1.3
S4 - Suspend to Disk (Hibernate)
S4 is a suspend state in which most power planes of the processor are turned off,
except for the suspend and RTC well. In this ACPI state, system context is saved to the
hard disk.
except for the suspend and RTC well. In this ACPI state, system context is saved to the
hard disk.
Key features:
•
No activity is allowed.
•
All power wells are disabled, except for the suspend and RTC well.
6.2.1.4
S5 - Soft Off
From a hardware perspective the S5 state is identical to the S4 state. The difference is
purely software; software does not write system context to hard disk when entering
S5.
purely software; software does not write system context to hard disk when entering
S5.
The following table shows the differences in the sleeping states with regards to the
processor’s output signals.
processor’s output signals.
NOTES:
NOTES:The processor treats S4 and S5 requests the same. The processor does not have
PMC_SLP_S5#. PMC_SUS_STAT# is required to drive low (asserted) even if core well is left
on because PMC_SUS_STAT# also warns of upcoming reset.
on because PMC_SUS_STAT# also warns of upcoming reset.
Table 48. SoC Sx-States to SLP_S*#
State
S0
S3
S4
S5
Reset w/o
Power Cycle
Reset w/
Power Cycle
CPU Executing
In C0
OFF
OFF
OFF
No
OFF
PMC_SLP_S3#
HIGH
LOW
LOW
LOW
HIGH
LOW
PMC_SLP_S4#
HIGH
HIGH
LOW
LOW
HIGH
LOW
S0 Power Rails
ON
OFF
OFF
OFF
ON
OFF
PMC_PLTRST#
HIGH
LOW
LOW
LOW
LOW
LOW
PMC_SUS_STAT#
HIGH
LOW
LOW
LOW
HIGH
LOW
PCIe Links
L0, L1
L3
L3
L3
L3 Ready
L3