2022-01-19 07:48 AM
We have the below ETH pins connected to a KSZ8081RNACA-T with the pins setup in alternate function for ETH, there is no code for initialization of ETH as of now (future implementation). We have had a few processors die with 3.3v shorting to gnd, could this be a possible cause? These pins have subsequently been setup as "floating inputs".
ETH_RMII_REF_CLK
ETH_MDIO
ETH_RMII_CRS_DV
ETH_MII_RX_D0
ETH_RMII_RX_D1
ETH_RMII_TX_EN
ETH_RMII_RXD0
ETH_RMII_RXD1
2022-01-19 01:48 PM
Generally uninitialized pins are in analog or input mode, apart from some special ones.
Pins come up uninitialized, so you would run into the same issue even if your Ethernet code was present.
I doubt that’s your issue. More likely a power issue, inrush voltage spike, or similar event.