cExpress-HL
Page 23
Signal
Pin # Description
I/O
PU/PD
Comment
LID#
LID button. Low active signal used by the ACPI operating system for a LID
switch.
I OD
3.3VSB
PU 10k
3.3VSB
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
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. Nom3.0V.
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
