3.3 Connectors description
3.3.1 COM Express module connectors
For the connection of COM Express CPU modules, on board there are two connectors, type TYCO 3-6318491-6
(220 pin dual row plug, ultra thin, 0.5mm pitch, h=8mm), as requested by COM Express specifications.
The pinout of these connectors will be briefly described in the following paragraphs. Please refer to COM Express
standard for a better description of each signal.
Description
Power Ground
GbEthernet Differential pair 3-
GbEthernet Differential pair 3+
GbEthernet 100Mb/s link ind.
GbEthernet 1000Mb/s link ind.
GbEthernet differential pair 2-
GbEthernet Differential pair 2+
GbEthernet link indicator
GbEthernet Differential pair 1-
GbEthernet Differential pair 1+
Power Ground
GbEthernet Differential pair 0-
GbEthernet Differential pair 0+
GbEthernet Reference Voltage
Suspend to RAM (S3) signal
SATA0 Transmit Data +
SATA0 Transmit Data -
Suspend to Disk (S4) Signal
SATA0 Receive Data +
SATA0 Receive Data -
CCOMe-965
CCOMe-965 - Rev. First Edition: 1.0 - Last Edition: 3.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
COM Express Connector CN1 - Rows A & B
Pin name
Pin nr.
GND
A1
GBE0_MDI3-
A2
GBE0_MDI3+
A3
GBE0_LINK100#
A4
GBE0_LINK1000#
A5
GBE0_MDI2-
A6
GBE0_MDI2+
A7
GBE0_LINK#
A8
GBE0_MDI1-
A9
GBE0_MDI1+
A10
GND
A11
GBE0_MDI0-
A12
GBE0_MDI0+
A13
GBE0_CTREF
A14
SUS_S3#
A15
SATA0_TX+
A16
SATA0_TX-
A17
SUS_S4#
A18
SATA0_RX+
A19
SATA0_RX-
A20
Pin nr.
Pin name
B1
GND
B2
GBE0_ACT#
B3
LPC_FRAME#
B4
LPC_AD0
B5
LPC_AD1
B6
LPC_AD2
B7
LPC_AD3
B8
LPC_DRQ0#
B9
LPC_DRQ1#
B10
LPC_CLK
B11
GND
B12
PWRBTN#
B13
SMB_CK
B14
SMB_DAT
B15
SMB_ALERT#
B16
SATA1_TX+
B17
SATA1_TX-
B18
SUS_STAT#
B19
SATA1_RX+
B20
SATA1_RX-
Description
Power Ground
GbEth Activity indicator
LPC Frame Indicator
LPC Address / Data Bus 0
LPC Address / Data Bus 1
LPC Address / Data Bus 2
LPC Address / Data Bus 3
LPC Serial DMA Request 0
LPC Serial DMA Request 2
LPC Clock Output 33MHz
Power Ground
Power Button
SM Bus Clock
SM Bus Data
SM Bus Alert signal
SATA1 Transmit Data +
SATA1 Transmit Data -
Suspend operations signal
SATA1 Receive Data +
SATA1 Receive Data -
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