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i.MX8 SMARC SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
SMARC
Pin No.
SMARC Edge Signal
Name
CPU Ball Name/
Pin Number
Signal Type/
Termination
Description
S27
GBE1_MDI3-
NA
IO, GBE
Second Gigabit Ethernet MDI
differential pair 3 negative.
S28
VPHY1_DVDDL
NA
Power
Power for the Centre Tap of Mack
Jack connector.
S31
GBE1_LINK_ACT#
NA
O, 3.3V CMOS
68K PD
Ethernet Activity status LED.
Note: Connect to Cathode of LED.
2.7.2
SERDES and MDIO Interface (Optional)
The i.MX8 QM/QP SMARC SOM optionally supports two SERDES interface support on the SMARC Edge using the two
on SOM Ethernet PHY “AR8031” from Atheros, Qualcomm
and a MDIO support from the ENET MDIO (Either ENET0 or
ENET1) of the i.MX8 processor on the SMARC Edge connector. SERDES0 and SERDES1 are from the first and second
Ethernet PHY and are optionally connected to SERDES0 and SERDES1 of SMARC edge connector respectively.
For more details on SERDES and MDIO pinouts, refer below Table:
SMARC
Pin No.
SMARC Edge Signal
Name
CPU Ball Name/
Pin Number
Signal Type/
Termination
Description
S29
SER
NA
O, PCIE
NC.
Note: Optionally connected to
SERDES0_SO_P
S30
SERDES0_TX-
NA
O, PCIE
NC.
Note: Optionally connected to
SERDES0_SO_N
S32
SER
NA
I, PCIE
NC.
Note: Optionally connected to
SERDES0_SI_P
S33
SERDES0_RX-
NA
I, PCIE
NC.
Note: Optionally connected to
SERDES0_SI_N
S45
SMARC_MDIO_CLK
NA
O, 1.8V CMOS
NC.
Note: Optionally connected to
ENET0_MDC or ENET1_MDC
S46
SMARC_MDIO_DATA
NA
IO, 1.8V CMOS
NC.
Note: Optionally connected to
ENET0_MDC or ENET1_MDC
S78
SER
NA
I, PCIE
NC.
Note: Optionally connected to
SERDES1_SI_P
S79
SERDES1_RX-
NA
I, PCIE
NC.
Note: Optionally connected to
SERDES1_SI_N
S81
SER
NA
O, PCIE
NC.
Note: Optionally connected to
SERDES1_SO_P
S82
SERDES1_TX-
NA
O, PCIE
NC.
Note: Optionally connected to
SERDES1_SO_N