ADLINK Technology COM Express cExpress-BL User Manual page 24

Signal Pin # Description
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.
LID# LID button. Low active signal used by the ACPI operating system for a LID
switch.
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.
3.3.18. Power and Ground
Signal Pin #
VCC_12V A104-A109
B104-B109
VCC_5V_SBY B84-B87
VCC_RTC A47
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
Page 24
Description
Primary power input: +12V nominal (5 ~ 20V wide input).
All available VCC_12V pins on the connector(s) shall be used.
Standby power input: +5.0V nominal. 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.
Real-time clock circuit-power input. Nominally +3.0V.
Ground - DC power and signal and AC signal return path.
I/O PU/PD Comment
I 3.3VSB PU 10k
3.3VSB
I OD PU 10k Emulated
3.3VSB 3.3VSB on GPIO
(BIOS)
I OD PU 10K Emulated
3.3VSB 3.3VSB on GPIO
(BIOS)
I/O PU/PD Comment
P 5~20 V
P 5Vsb ±5%
P
P