Table 24 Power And System Management Signal Descriptions - Congatec COM Express conga-TR4 User Manual

Note
The congatec COM Express Type 6 and Type 10 modules use a Push-Pull output for the fan_pwm signal instead of the open drain output
specified in the COM Express specification. Although this does not comply with the COM Express specification 3.0, the benefits are obvious.
The Push-Pull output optimizes the power consumed by the fan_pwm signal without functional change.
Table 24 Power and System Management Signal Descriptions
Signal Pin # Description
PWRBTN# B12 Power button to bring system out of S5 (soft off), active on rising edge.
Note: For proper detection, assert a pulse width of at least 16 ms.
SYS_RESET# B49 Reset button input. Active low input. Edge triggered.
System will not be held in hardware reset while this input is kept low.
Note: For proper detection, assert a pulse width of at least 16 ms.
CB_RESET# B50 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.
PWR_OK B24 Power OK from main power supply. A high value indicates that the power is good.
SUS_STAT# B18 Indicates imminent suspend operation; used to notify LPC devices.
SUS_S3# A15 Indicates system is in Suspend to RAM state. Active-low output. An inverted copy of
SUS_S3# on the carrier board (also known as "PS_ON") may be used to enable the
non-standby power on a typical ATX power supply.
SUS_S4# A18 Indicates system is in Suspend to Disk state. Active low output.
SUS_S5# A24 Indicates system is in Soft Off state.
WAKE0# B66 PCI Express wake up signal.
WAKE1# B67 General purpose wake up signal. May be used to implement wake-up on PS/2
keyboard or mouse activity.
BATLOW# A27 Battery low input. This signal may be driven low by external circuitry to signal that
the system battery is low, or may be used to signal some other external power-
management event.
THRM# B35 Input from off-module temp sensor indicating an over-temp situation.
THERMTRIP# A35 Active low output indicating that the CPU has entered thermal shutdown.
SMB_CK B13 System Management Bus bidirectional clock line.
SMB_DAT# B14 System Management Bus bidirectional data line.
SMB_ALERT# B15 System Management Bus Alert – active low input can be used to generate an SMI#
(System Management Interrupt) or to wake the system.
LID# A103 Lid button. Used by the ACPI operating system for a LID switch.
Note: For proper detection, assert a pulse width of at least 16 ms.
SLEEP# B103 Sleep button. Used by the ACPI operating system to bring the system to sleep state
or to wake it up again.
Note: For proper detection, assert a pulse width of at least 16 ms.
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