4.9 Power Management Interface Signals –Table 2
Name
Type
Description
SLP_S5# /
GPIO63
O
S5 Sleep Control:
SLP_S5# is for power plane control. This
signal is used to shut power off to all non-critical systems
when in the S5 (Soft Off) states. Pin may
also be used as GPIO63
SLP_M#
O
Manageability Sleep State Control:
This signal is used to
control power planes to the Intel® AMT sub-system. If no
Management Engine firmware is present, SLP_M# will have
the same timings as SLP_S3#.
SLP_LAN# /
GPIO29
O
LAN Sub-System Sleep Control:
When SLP_LAN# is
deasserted it indicates that the Hanksville PHY device must be
powered. When SLP_LAN# is asserted power can be shut off
to the Hanksville PHY device. SLP_LAN# will always be
deasserted in S0 and anytime SLP_M# is deasserted.
SLP_LAN# behavior in Sx/Moff can be configured by ME
FW. If ME FW is not configuring SLP_LAN#, host can
control the signal behavior by configuring GPIO29 as an
output. If neither ME FW nor host BIOS configure the pin as
an output, SLP_LAN# behavior will be based on the setting of
the RTC backed SLP_LAN# Default Bit (D31:F0:A4h:bit 8).
NOTE:
The SLP_LAN# Default Value Bit will always
determine SLP_LAN# behavior when in S4/S5/Moff after a
G3, when in S5/Moff after a host partition reset with power
down and when in S5/Moff due to an unconditional power
down.
