miriac SBC-S32G-R3_User Manual
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© MicroSys Electronics GmbH 2021
6.4.2 MDIO addressing
MDIO-0 from MAC0 is connected to PHYs: 2x 88E1512P, SJA1110
Part
component
Address
J41
88E1512P
Addr = 0x00h (ST21A) (SGMII from S32G)
J43
88E1512P
Addr = 0x01h (ST22B) (RGMII from S32G)
J39
SJA1110
Addr = 0x10h
Addr = 0x08h … 0x0dh (6x T1 Phys)
Table 6-5 LAN / MDIO0 / Addressing
MDIO-1 from MAC1 is connected to PHYs: 1x 88E1512P
Part
component
Address
J44
88E1512P
Addr = 0x03h (ST22A) (RGMII from S32G)
Table 6-6 LAN / MDIO1 / Addressing
MDIO-SJA1110 is connected to PHYs: 1x 88E1512P, 1x 88Q2112
Part
component
Address
J42
88E1512P
Addr = 0x05h (ST21B) (SGMII from SJA1110)
J8
88Q2112
Addr = 0x04h (ST23) (RGMII from SJA1110)
Table 6-7 LAN / MDIO0 / Addressing
6.4.3 1G LAN SerDes_0 Lane1 (ST21A)
The SGMII lanes connect to Marvell PHY 88E1512P.
88E1512P
MXM1
S32G274A
Pin
Name
Pin
Signal
Pin
Name
1
S_INP
←
T88
←
W18
PCIE1_TX1_P
2
S_INN
←
T87
←
Y18
PCIE1_TX1_N
4
S_OUTP
→
T73
→
AB21
PCIE1_RX1_P
5
S_OUTN
→
T72
→
AC21
PCIE1_RX1_N
Table 6-8 SerDes 1 pin assignment
LED
Signal (in SCM)
Port (88E1512P)
Pin
GN
SGMII_P0_LED0
LED[0]
14
YE
SGMII_P0_LED1
LED[1]
13
Table 6-9 ST21A (1G) LEDs
Connector pinning is standard RJ45