Tool/software:
Hi TI Team,
We are using the DP83TC814RRHARQ1 Ethernet PHY in our design, interfaced with an STM32H743BIT6 microcontroller, which acts as the MAC. I’ve reviewed both the reference schematic and the evaluation schematic for the PHY, and noticed differences in how TX and RX signals are connected:
- In the evaluation schematic, TX signals from one device are connected to RX signals of another (crossed).
- In the reference schematic, TX signals are connected to TX, and RX to RX (straight-through).
- In our design, we’ve followed the reference schematic approach (TX → TX, RX → RX).
Could you please confirm:
- Is the straight-through connection (TX → TX, RX → RX) correct when interfacing the STM32H743BIT6 MAC with the DP83TC814RRHARQ1 PHY?
- Is there any specific reason why the evaluation schematic uses crossed connections—perhaps for PHY-to-PHY communication?
I’ve attached our schematic along with the reference and evaluation schematics for context.
