I am working on an application with transformerless ethernet. The closest TI appnote I can find recommends turning off the autoMDIX and auto-negotiation. The DP83825 PHY datasheet says auto-negotiation can be disabled by pulling up the LED at boot with 2.49K.
Auto MDIX can be disabled by pulling RX_ER high with 2.49K, but not an easy thing to solder. This PHY pin connects to the ARM chip. Is there any way to modify the teensy config so that this can be disabled by pulling this signal up at PHY boot, or would it be at PHY reset?
Auto MDIX can be disabled by pulling RX_ER high with 2.49K, but not an easy thing to solder. This PHY pin connects to the ARM chip. Is there any way to modify the teensy config so that this can be disabled by pulling this signal up at PHY boot, or would it be at PHY reset?