15.2.2.5 WRERR Bit

The WRERR bit can be used to determine if a write error occurred. WRERR will be set if one of the following conditions occurs:
  • If WR is set while the NVMADRH:NMVADRL points to a write-protected DFM address
  • A Reset occurs while a self-write operation was in progress
  • An unlock sequence was interrupted

The WRERR bit is normally set by hardware, but can be set by the user for test purposes. Once set, WRERR must be cleared in software.