Express-KL
Pinouts and Signal Descriptions
21
Signal
Pin #
Description
I/O
PU/PD
Comment
PWR_OK B24
Power OK from main power supply. A high value indicates that
the power is good. This signal can be used to hold off Module
startup to allow carrier based FPGAs or other configurable
devices time to be programmed.
I
3.3VSB
PU 10k
3.3VSB
Should
have weak
pull up.
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
WAKE0#
B66
PCI Express wake up signal.
I
3.3VSB
PU 10k
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 10k
3.3VSB
Connect to
WAKE 0#
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 10k
3.3VSB
Emulated
on GPIO
(BIOS)
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 10K
3.3VSB
Emulated
on GPIO
(BIOS)
3.3.19. 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
8.5-20
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. Nom3.0V. P
GND
A1, A11, A21, A31, A41,
A51, A57, A60, A66, A70,
A80, A90, 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
Содержание Express-KL
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