CME-Atom User Manual 1.2
www.diamondsystems.com
Page 20
4.1.7
Power and System Management
These pins support various power management and control functions.
Signal Name
Signal Function
Direction
PWRBTN#
Power button to bring system out of S5 (soft off), active on
rising edge.
I
SYS_RESET# Reset button input.
I
CB_RESET#
Reset output from module to carrier board.
O
PWR_OK
Power OK from main power supply.
I
SUS_STAT#
Indicates imminent suspend operation; used to notify LPC
devices.
O
SUS_S3#
Indicates system is in Suspend to RAM state.
O
SUS_S4#
Indicates system is in Suspend to Disk state.
O
SUS_S5#
Indicates system is in Soft Off state. Also known as
"PS_ON" and can be used to control an ATX power
supply.
O
WAKE0#
PCI Express wake up signal.
I
WAKE1#
General purpose wake up signal.
I
BATLOW#
Indicates that external battery is low.
I
THRM#
Input from off-module temp sensor indicating an over-temp
situation.
I
THERMTRIP#
Active low output indicating that the CPU has entered
thermal shutdown.
O
SMB_CK
System Management Bus bidirectional clock line.
I/O
SMB_DAT
System Management Bus bidirectional data line.
I/O
SMB_ALERT# System Management Bus Alert..
I