Peripherals 6
miriac SBC-T1024 User Manual
V 2.3
36/70
© MicroSys Electronics GmbH 2017
The LAN Sockets have a standard layout for GBit Ethernet, i.e. the pairs are 1-2, 3-
6, 4-5 and 7-8.
Pin
Pair
1
D-A+
2
D-A-
3
D-B+
4
D-C+
5
D-C-
6
D-B-
7
D-D+
8
D-D-
Table 6-3 LAN Gigabit Ethernet connector pairs
6.3.1 Port 1 / 2 / 3
Port 1, 2 and 3 are SGMII ports which are not supported by the evaluation board
SBC-T1024.
6.3.2 Port 4
Port 4 is connected to a standard RJ-
45 socket “LAN2”. It uses the Ethernet
controller EC1 as RGMII port provided by the T1024 CPU. The RGMII lanes
connect to a Marvell PHY 88E1512P which uses a copy of the reference voltage on
pin T80 of the module connector ST4 as I/O voltage (1.8V).
The following table shows the internal connections for Port 4.
I/O
Range
88E1512P
ST4
T1024
Pull-
up
Pull-
down
Pin
Name
Pin
Signal
Pin
Name
1.8V
46
RX_CLK
→
T86
MII1-
RXCK
→ AD1
MII_RX_CLK
1.8V
43
RX_CTRL
→
T95
MII1-
RXDV
→ AG2
MII_RX_DV
1.8V
44
RXD0
→
T88
MII1-
RXD0
→ AF2
MII_RXD0
1.8V
4k7
45
RXD1
→
T89
MII1-
RXD1
→ AF1
MII_RXD1
1.8V
47
RXD2
→
T91
MII1-
RXD2
→ AE1
MII_RXD2
1.8V
48
RXD3
→
T92
MII1-
RXD3
→ AD2
MII_RXD3
1.8V
53
TX_CLK
←
T94
MII1-
TXCK
← AF3
MII_TX_CLK
1.8V
50
TXD0
←
T97
MII1-
TXD0
← AE3
MII_TXD0
1.8V
51
TXD1
←
T98
MII1-
TXD1
← AE4
MII_TXD1
1.8V
54
TXD2
←
T100
MII1-
TXD2
← AD3
MII_TXD2
1.8V
55
TXD3
←
T101
MII1-
TXD3
← AC3
MII_TXD3
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