Signal Description
Table 2-14. System Management Interface Signals (Sheet 2 of 2)
Name
Type
Description
Wake On LAN Power Enable. In an Intel AMT or ASF enabled
system, this output signal is driven high by the ICH to control the LAN
subsystem power (VccLAN3_3, VccCL3_3, LAN PHY Power, and SPI
device) to support Wake on LAN (WOL) when the Intel Management
Engine is powered off. This functionality is configured and controlled
by the Intel Management Engine prior to entering the powered off
state.
NOTES:
1.
WOL_EN /
GPIO9
This signal should be OR’d with the SLP_M# signal on the
motherboard to determine when to power the LAN subsystem.
In order to support WOL out of a G3 state, the WOL_EN pin
needs to be pulled high by an external resistor until the Intel
Management Engine is initialized.
O
2.
If ASF or Intel AMT are disabled on a board that is configured for
WOL_EN support, BIOS must utilize GPIO9 to control power to the
LAN subsystem when entering S3-S5.
In platforms that do not support Intel AMT or ASF, this signal is used
as GPIO9.
CPU Missing. This signal provides CPU Missing functionality and is
configured and controlled by the Manageability Engine.
CPU_MISSING /
GPIO10 /
JTAGTMS
(Corporate Only)
This signal must be connected to the CPU SKTOCC# output to
indicate to the Intel Manageability Engine that the CPU is not
physically present when asserted.
I
I
ICH10 Consumer Family: This signal may be used as GPIO10.
ICH10 Corporate Family: This signal may be used as GPIO10 or
JTAGTMS.
TPM Physical Presence. This signal is asserted to indicate Physical
Presence to the integrated TPM module.
TPM_PP /
GPIO57 /
JTAGTCK
(Corporate Only)
ICH10 Consumer Family: This signal may be used as GPIO57.
ICH10 Corporate Family: This signal may be used as GPIO57 or
JTAGTCK.
2.15
Real Time Clock Interface
Table 2-15. Real Time Clock Interface
Name
Type
Description
Crystal Input 1: This signal is connected to the 32.768 kHz crystal. If
RTCX1
Special no external crystal is used, then RTCX1 can be driven with the desired
clock rate.
Crystal Input 2: This signal is connected to the 32.768 kHz crystal. If
Special
RTCX2
no external crystal is used, then RTCX2 should be left floating.
64
Datasheet
INTEL [ INTEL ]
