Peripherals 6
miriac SBC-LS1028A User Manual
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© MicroSys Electronics GmbH 2019
RGMII
The RGMII port is connected to a standard RJ45 socket ST12. It uses the Ethernet
controller EC1 of the LS1028A as an RGMII port. The RGMII lane connects to a
Marvell PHY 88E1512P PHY.
The following table shows the internal connections for the RGMII port:
LS1028A
ST6
88E1512P
I/O
Pin
Name
Pin
Signal
Pin
Name
Range Pull-up
Pull-
down
AD2
EC1_RX_CLK
← B53
EC1_RX_CLK
← 46
RX_CLK
1.8V
AH2
EC1_RX_DV
← B52
EC1_RX_DV
← 43
RX_CTRL
1.8V
AF2
EC1_RXD0
← B58
EC1_RXD0
← 44
RXD0
1.8V
AA1
EC1_RXD1
← B57
EC1_RXD1
← 45
RXD1
1.8V
AE3
EC1_RXD2
← B56
EC1_RXD2
← 47
RXD2
1.8V
AE1
EC1_RXD3
← B55
EC1_RXD3
← 48
RXD3
1.8V
AH4
EC1_GTX_CLK
→ T71
EC1_GTX_CLK
→ 53
TX_CLK
1.8V
AF6
EC1_TXD0
→ T69
EC1_TXD0
→ 50
TXD0
1.8V
AF4
EC1_TXD1
→ T68
EC1_TXD1
→ 51
TXD1
1.8V
AD4
EC1_TXD2
→ T67
EC1_TXD2
→ 54
TXD2
1.8V
AG5
EC1_TXD3
→ T66
EC1_TXD3
→ 55
TXD3
1.8V
AJ3
EC1_TX_EN
→ T64
EC1_TX_EN
→ 56
TX_CTRL
1.8V
4k7
AK4
EMII_MDIO
↔ T60
EMII_MDIO
↔ 8
MDIO
1.8V
1k5 ||
10k
AK6
EMII_MDC
→ T62
EMII_MDC
→ 7
MDC
1.8V
4k7
AK2
EC1_GTX_CLK125
← B60
EC1_GTX_CLK125
← 9
CLK125
1.8V
Table 6-5 Port RGMII pin assignment
Figure 6-2 RGMII topology