Table 31 Power And System Management Signal Descriptions - Congatec COM Express conga-TCA3 User Manual

Table 31 Power and System Management Signal Descriptions
Signal Pin # Description
PWRBTN# B12 Power button to bring system out of S5 (soft off), active on falling 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.
Copyright © 2014 congatec AG
I/O
I 3.3VSB
I 3.3VSB
O 3.3V
I 3.3V
O 3.3VSB
O 3.3VSB
O 3.3VSB
O 3.3VSB
I 3.3VSB
I 3.3VSB
I 3.3VSB
I 3.3V
O 3.3V
I/O 3.3VSB PU 4.99k
I/O OD
3.3VSB
I 3.3VSB
I OD 3.3V
TA30m16
PU/PD Comment
PU 10k
3.3VSB
PU 10k
3.3VSB
Set by resistor divider to
accept 3.3V
PU 10k
3.3VSB
Not supported by chipset.
Shorted with SUS_S4#
PU 4.99k
3.3VSB
PU 4.99k
3.3VSB
PU 4.99k
3.3VSB
PU 10k
3.3V
PU 10k
3.3V
3.3VSB
PU 4.99k
3.3VSB
PU 10k
3.3VSB
PU 10k
3.3VSB
58/95