7.6 Cable Fault Diagnostics

The LAN8650/1 contains hardware support for cable fault diagnostics, which can be used to support, for example, OPEN Alliance harness defect detection requirements for automotive Ethernet PHYs. Using these features, it is possible for a station host controller to determine various cable failures in a multidrop network. These failures include

• Both conductors open
• Both conductors shorted together
• Both conductors shorted to power or ground

Additional information, including the software algorithm recommended for the host controller, is available under NDA.