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User's Manual l MBa335x UM 0202 l © 2018, TQ-Systems GmbH
Page 23
4.2.3
Ethernet 1000BASE-T
The MBa335x provides two identical Gigabit Ethernet interfaces. A Micrel KSZ9031 PHY is used in each case. The RJ45 jacks X11
and X12 each contain integrated magnetics and two status LEDs. The PHY automatically selects speed (10/100/1000 Mbps) and
mode (full-duplex / half-duplex). It meets IEEE 802.3 and provides options as for example Wake-on-LAN or jumbo frame support.
KSZ9031
RGMII1
RJ45
(X11)
STKRST#
KSZ9031
RJ45
(X12)
RGMII2
TQMa335x
RGMII
RGMII
RGMII
USB0_DRVBUS
GPIO1_29
ENET_2.INT#
ENET_1.INT#
Illustration 17:
Block diagram Ethernet 1000BASE-T
The interrupt outputs of the PHYs are routed to the TQMa335x by default. Optionally the interrupt outputs can be routed to the
input port expander D901. See section 4.1.6 and the following table.
Table 32:
Placement options for PHY interrupt
Option
R917
R924
R918
R923
ENET_1.INT# at USB0_DRVBUS (Default assembly)
NP
0 Ω
ENET_1.INT# at IO6 of D901
0 Ω
NP
x
ENET_2.INT# at GPIO1_29 (Default assembly)
NP
0 Ω
ENET_2.INT# at IO7 of D901
x
0 Ω
NP
Attention:
The PHY can only operate in master mode on account of PHY errata (ITEM #2). No link can be
established if the remote station also only works in master mode.
Illustration 18:
Position of X11 and X12
X12 X11