14.6.6.1 External Aborts on Data Write

Externally generated errors during a data write can be asynchronous. This means that the r14_abt on entry into the abort handler on such an abort might not hold the address of the instruction that caused the exception.

The DFAR is Unpredictable when an asynchronous abort occurs.

Externally generated errors during data read are always synchronous. The address captured in the DFAR matches the address which generated the external abort.