SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
Figure 15-15 shows the proper method for interfacing the Ethernet Controller to a 10/100BASE-T Ethernet jack.
The Ethernet PHY is designed to work with transformers that meet the IEEE 802.3 standard. To utilize the Auto-MDIX (AMDIX) capability of the Ethernet PHY, a symmetrical transformer is recommended. The Pulse HX1188 transformer has been tested and is known to successfully interface to the Ethernet PHY.
NOTE
If the PHY is not to be used, then the EN0RXIN / EN0TX0N EN0RXIP / EN0TX0P pair should be left unconnected and the RBIAS pin should be unconnected as well.
NOTE
When entering hibernation in VDD3ON mode, the supply rails to the Ethernet resistors R1, R2, R3, R4 found in Figure 15-15 must be switched off.