COMe-bSL6 – User Guide Rev. 1.4
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// 55
5.2.2.
Connector X1A Row B
The following table lists the pins for connector X1A row B.
Table 30: Connector X1A Row B Pinout List
Pin
COME Signal
Description
Type
Termination
Comment
B1
GND
Power Ground
PWR GND
B2
GBE0_ACT#
Ethernet Controller activity LED indicator
OD
B3
LPC_FRAME#
Indicates the start of an LPC cycle
O-3.3
B4
LPC_AD0
LPC multiplexed command, address and data #
I/O-3.3
PU 15 k
Ω
to 40 k
Ω
in PCH (S5)
B5
LPC_AD1
B6
LPC_AD2
B7
LPC_AD3
B8
LPC_DRQ0#
LPC serial DMA/Master request #
NC
B9
LPC_DRQ1#
B10
LPC_CLK
LPC 24 MHz clock output
O-3.3
PD 20 k
Ω
in PCH
24 MHz
B11
GND
Power Ground
PWR GND
B12
PWRBTN#
Power Button - a falling edge creates a power
button event
I-3.3
PU 10 k
Ω
, 3.3 V
Power button events can
be used to bring a system
out of S5 soft-off and
other suspend states, as
well as powering the
system down.
B13
SMB_CLK
SMBus clock line
O-3.3
PU 2.56 k
Ω,
3.3 V
(S5)
B14
SMB_DAT
SMBus bidirectional data line
I/O-3.3
PU 2.56 k
Ω,
3.3 V
(S5)
B15
SMB_ALERT#
SMBus alert can be used to generate a SMI# or to
wake the system
I/O-3.3
PU 2.2 k
Ω,
3.3 V
(S5)
B16
S
SATA 1 transmit data pair
DP-O
B17
SATA1_TX-
B18
SUS_STAT#
Indicates imminent suspend operation; used to
notify LPC devices.
O-3.3
B19
S
SATA 1 receive data pair
DP-I
B20
SATA1_RX-
B21
GND
Power Ground
PWR GND
B22
S
SATA 3 transmit data pair
DP-O
B23
SATA3_TX-
B24
PWR_OK
Power OK from main power supply.
I-5T
PU 61 k
Ω
, 3.3 V
20 V protection circuit
implemented on module
B25
S
SATA 3 receive data pair
DP-I
B26
SATA3_RX-
B27
WDT
Indicates a watchdog time-out event has
occurred
O-3.3
PD 10 k
Ω
B28
HDA_SDIN2
Audio Codec serial data input 2
NC
Not supported
B29
HDA_SDIN1
Audio Codec serial data input 1
I-3.3
PD 20 k
Ω
in PCH
B30
HDA_SDIN0
Audio Codec serial data input 0
B31
GND
Power Ground
PWR GND
B32
SPKR
Speaker output provides the PC beep signal and
is mainly intended for debugging purposes
O-3.3
PD 20 k
Ω
in PCH
PD is enabled until reset
is deasserted
B33
I2C_CK
I2C port clock output
O-3.3
PU 2.21 k
Ω,
3.3 V
(S5)
B34
I2C_DAT
I2C port data I/O line
I/O-3.3
PU 2.21 k
Ω,
3.3 V
(S5)
B35
THRM#
Input from off-Module temp sensor indicating an
over-temp situation
I-3.3
PU 10 k
Ω
to 3.3 V
(S0)
No function implemented