Express-BD7
Pinouts and Signal Descriptions
19
Signal
Pin
Description
I/O
PU/PD
Comment
SUS_STAT# B18 Indicates imminent suspend operation; used to notify LPC
devices.
O 3.3VSB PU 10k
3.3VSB
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.
O 3.3VSB
SUS_S4# A18
Indicates system is in Suspend to Disk state. Active low
output.
O 3.3VSB
SUS_S5#
A24
Indicates system is in Soft Off state.
O 3.3VSB
WAKE0#
B66
PCI Express wake up signal.
I 3.3VSB
PU 1k
3.3VSB
WAKE1# B67
General purpose wake up signal. May be used to implement
wake-up on PS/2 keyboard or mouse activity.
I 3.3VSB
PU 1k
3.3VSB
Connect to
WAKE 1#
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.
I 3.3VSB
PU 10k
3.3VSB
LID# A103
LID button. Low active signal used by the ACPI operating
system for a LID switch.
I OD
3.3VSB
PU 47k
3.3VSB
SLEEP# B103
Sleep button. Low active signal used by the ACPI operating
system to bring the system to sleep state or to wake it up
again.
I OD
3.3VSB
PU 47k
3.3VSB
3.3.15. Power and Ground
Signal
Pin
Description
I/O
PU/PD
Comment
VCC_12V A104-A109
B104-B109
Primary power input: +12V nominal (wide range
5-20V).
All available VCC_12V pins on the connector(s)
shall be used.
P 8.5-20
V
VCC_5V_S
BY
B84-B87
Standby power input: +5.0V nominal. See
COM.0 Base Specification, Section 7 “Electrical
Specifications“ for allowable input range. If
VCC5_SBY is used, all available VCC_5V_SBY
pins on the connector(s) shall be used. Only
used for standby and suspend functions. May be
left unconnected if these functions are not used
in the system design.
P 5Vsb
±5%
VCC_RTC A47
Real-time clock circuit-power input. Nominally
+3.0V.
P
GND
A1, A11, A21, A31,
A41, A51, A57, A66,
A80, A90, A96, A100,
A110, B1, B11,
B21,B31, B41, B51,
B60, B70, B80, B90,
B100, B110
Ground - DC power and signal and AC signal
return path.
P
