ADLINK cExpress-BL - Manual (Page 24)

Page 24 cExpress-BL
Signal Pin # Description I/O PU/PD Comment
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/PD Comment
VCC_12V A104-A109
B104-B109
Primary power input: +12V nominal (5 ~ 20V wide input).
All available VCC_12V pins on the connector(s) shall be used. P 5~20 V
VCC_5V_SBY B84-B87 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. 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