ADLINK Technology COM Express cExpress-BT2, User Manual

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22
Pinouts and Signal Descriptions
Signal Pin # Description I/O PU/PD Comment
configurable devices time to be programmed.
SUS_STAT# B18
Indicates imminent suspend operation; used to notify LPC
devices.
O 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 Not supported,
connect to
SUS_S4#
WAKE0# B66 PCI Express wake up signal. I 3.3VSB PU 10k
3.3VSB Not supported,
connected to
WAKE1#
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 10k
3.3VSB
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# LID button. Low active signal used by the ACPI operating
system for a LID switch. I OD
3.3VSB PU 10k
3.3VSB Emulated on
GPIO (BIOS)
SLEEP# 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 10K
3.3VSB Emulated on
GPIO (BIOS)
3.3.18. Power and Ground
Signal Pin # Description I/O PU/P
D 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 5~20 V
VCC_5V_S
BY B84-B87 Standby power input: +5.0V nominal. See 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