The device has an internal inconsistency in its EEPROM.  This is often an indication the power was removed during a STORE operation or the device was incorrectly programmed.

Possible Causes:

• Power was removed during a STORE_USER_ALL operation before the write to EEPROM completed
• The device was programmed with data incorrectly
• One or more bits in the EEPROM have changed from their initial value

Remedies and Workarounds

• Avoid removing power during a STORE_USER_ALL operation until the operation is complete
• For an improperly programmed device, re-program the device 'in system' using the programming utility