MSC Technologies Avnet COM Express CXC-BT, User Manual

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MSC CXC-BT User Manual
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2.10.13
Power and System Management
Signal Pin
Type Signal
Level Power
Rail Remark /
Tolerance PU/PD/SR Description Source / Target
PWRBTN# I CMOS 3.3V Sus
ePU = 10 KΩ
Power button to bring system out of or into Suspend states. Embedded
Controller
SYS_RESET# I CMOS 3.3V Sus 3.3V
ePU = 10 KΩ
Reset button input. Embedded
Controller
CB_RESET# O CMOS 3.3V Sus 3.3V,
24mA
Reset output from module to Carrier Board. Active low. Issued by
module chipset and may result from a low SYS_RESET# input, a low
PWR_OK input, a VCC_12V power input that falls below the
minimum specification, a watchdog timeout, or may be initiated by the
module software. BT SOC
PWR_OK I CMOS 3.3V Sus 12V ePU = 22 K
Ω
Power OK from main power supply. A high value indicates that the
power is good. Embedded
Controller
SUS_STAT# O CMOS 3.3V Sus 3.3V Indicates imminent suspend operation; used to notify LPC devices. BT SOC
SUS_S3# O CMOS 3.3V Sus 3.3V, 7mA Indicates system is in Suspend to RAM state. Active low output. BT SOC
SUS_S4# O CMOS 3.3V Sus 3.3V, 7mA Indicates system is in Suspend to Disk state. Active low output.
Shorted to SUS_S5#. BT SOC
SUS_S5# O CMOS 3.3V Sus 3.3V, 7mA Indicates system is in Soft Off state. Active low output. BT SOC
WAKE0# I CMOS 3.3V Sus 3.3V ePU = 10
KΩ
PCI Express wake-up signal. BT SOC
WAKE1# I CMOS 3.3V Sus 3.3V
ePU = 10 KΩ
General purpose wake up signal. May be used to implement wake-up
on PS2 keyboard or mouse activity. BT SOC
BATLOW# I CMOS 3.3V Sus 3.3V ePU = 10
KΩ
iPU = 40-50
KΩ
Indicates that external battery is low. BT SOC,
Embedded
Controller
LID# I CMOS 3.3V Sus 12V ePU = 47
KΩ
iPU = 40-50
KΩ
LID switch. Low active signal used by ACPI operating system for LID
switch. BT SOC,
Embedded
Controller
SLEEP# I CMOS 3.3V Sus 12V ePU = 47
KΩ
iPU = 40-50
KΩ
Sleep button. Low active signal used by ACPI operating system to
bring the system to sleep state or wake it up again. BT SOC,
Embedded
Controller
THRM# I CMOS 3.3V 3.3V
ePU = 10 KΩ
Input from off-module temperature sensor indicating an over-temp
situation.
Not supported.
Embedded
Controller
THERMTRIP# O CMOS 3.3V Sus 3.3V
ePU = 10 KΩ
Active low output indicating that the CPU has entered thermal
shutdown.
Not supported.
Embedded
Controller