4.18 Cable Fault Diagnostics - Rev C2
:
This section applies to devices of revision C2 and earlier. For newer devices, see the section Harness Defect Detection - Rev D0.
This product implements hardware to support basic cable fault diagnostics as specified in version 1.1 of OPEN Alliance Advanced Diagnostic Features for 10BASE‑T1S Automotive Ethernet PHYs Specification. 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. When using the software algorithm to aid in the
harness defect detection, the following failures may additionally be possible to detect
under the correct circumstances:
- One conductors shorted to ground or a supply voltage
- One conductor open
- Incorrect wire termination