Peripherals 6
miriac SBC-LS1028A User Manual
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© MicroSys Electronics GmbH 2019
The LAN Sockets have a standard layout for Gigabit 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
SGMII
SGMII is connected to a standard RJ45 socket ST12. It uses the SerDes Lane 0
provided by the LS1028A configured as an SGMII port. The SGMII lane connects
to a Marvell PHY 88E1512P PHY.
LS1028A
ST6
88E1512P
Pin
Name
Pin
Signal
Pin
Name
AF12
SD1-TX0_P
→
T55
SD1-TX0_P
→
1
S_INP
AG13
SD1-TX0_N
→
T54
SD1-TX0_N
→
2
S_INN
AK10
SD1-RX0_P
←
T58
SD1-RX0_P
←
4
S_OUTP
AJ11
SD1-RX0_N
←
T57
SD1-RX0_N
←
5
S_OUTN
Table 6-4 SerDes 0 pin assignment
Figure 6-1 SGMII topology