NXP Semiconductors MPC5748G - Ethernet Interface (P5); FlexRay (P8, P9, P10)

5.5.
Ethernet Interface (P5)
Communications & Memory Interfaces:
The Ethernet
interface is mid-way
along the top edge
of the LCEVB
The EVB incorporates a single DP83848c Ethernet transceiver with the circuitry configured for MII
mode. The transceiver is connected to a pulse J1011F21PNL RJ45 connector which includes a built-in
isolation transformer. There is no hardware configuration needed.
If you require RMII mode or access to both Ethernet ports on the MPC5748G, please purchase
the MPC5748G customer EVB and appropriate daughter cards.
Note that the MCU Ethernet signals are all in the VDD_HV_B domain. The Ethernet PHY will only
function with 3.3 V I/O so if you have made any modifications to the EVB power domain configuration
(via the zero ohm resistors), you need to ensure the VDD_HV_B domain is at 3.3 V before attempting
to use the Ethernet module. If VDD_HV_B is set to 5 V, the signals routed to the Ethernet PHY (see the
EVB schematics) must be left as tristate to prevent damage to the transceiver.
5.6.
FlexRay (P8, P9, P10)
The FlexRay
interfaces are midway
down the left hand
edge of the LCEVB
The LCEVB incorporates two FlexRay TJA1080TS/N interfaces connected to MCU FlexRay
channels A and B and routed to two Molex 1.25 mm pitch Pico Blade shrouded headers (standard on
many NXP EVB’s). There is no hardware configuration required to use FlexRay.
Note that the LCEVB is supplied with a 40 MHz crystal by default. If FlexRay is configured to use
the external clock source, then the crystal should be left at 40 MHz
MPC5748G Low Cost EVB User Guide, User Guide, Rev. 1, 08/2016
NXP Semiconductors 13
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