CCOMe-C79
CCOMe-C79 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by E.S. Copyright © 2021 SECO S.p.A.
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3.3
Connectors description
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.
COM Express Connector CN51 - Rows A & B
Description
Pin name
Pin nr.
Pin nr. Pin name
Description
Power Ground
GND
A1
B1
GND
Power Ground
GbEthernet Differential pair 3-
GBE0_MDI3-
A2
B2
GBE0_ACT#
GbEth Activity indicator
GbEthernet Differential pair 3+
GB
A3
B3
LPC_FRAME# / ESPI_CS0#
LPC Frame Indicator / eSPI Chip Select
GbEthernet 100Mb/s link ind.
GBE0_LINK100#
A4
B4
LPC_AD0 / ESPI_IO_0
LPC Address / Data Bus 0
eSPI Master Data Input / Output 0
GbEthernet 1000Mb/s link ind.
GBE0_LINK1000#
A5
B5
LPC_AD1 / ESPI_IO_1
LPC Address / Data Bus 1
eSPI Master Data Input / Output 1
GbEthernet differential pair 2-
GBE0_MDI2-
A6
B6
LPC_AD2 / ESPI_IO_2
LPC Address / Data Bus 2
eSPI Master Data Input / Output 2
GbEthernet Differential pair 2+
GB
A7
B7
LPC_AD3 / ESPI_IO_3
LPC Address / Data Bus 3
eSPI Master Data Input / Output 3
GbEthernet link ind.
GBE0_LINK#
A8
B8
LPC_DRQ0# / ESPI_ALERT0#
LPC serial DMA request
eSPI Alert request service signal
GbEthernet Differential pair 1-
GBE0_MDI1-
A9
B9
N.C.
Not connected
GbEthernet Differential pair 1+
GB
A10
B10
LPC_CLK / ESPI_CK
LPC Clock Output 33MHz
eSPI Master Clock Output
Power Ground
GND
A11
B11
GND
Power Ground
GbEthernet Differential pair 0-
GBE0_MDI0-
A12
B12
PWRBTN#
Power Button
GbEthernet Differential pair 0+
GB
A13
B13
SMB_CK
SM Bus Clock
GbEthernet Reference Voltage
GBE0_CTREF
A14
B14
SMB_DAT
SM Bus Data
Suspend to RAM (S3) signal
SUS_S3#
A15
B15
SMB_ALERT#
SM Bus Alert signal
