Status register
| EOP | End of operation |
| OPERR | Operation error |
| PROGERR | Programming error |
| WRPERR | Write protected error |
| PGAERR | Programming alignment error |
| SIZERR | Size error |
| PGSERR | Programming sequence error |
| MISERR | Fast programming data miss error |
| FASTERR | Fast programming error |
| OPTVERR | Option and Engineering bits loading validity error |
| BSY1 | BSY1 |
| BSY2 | BSY2 |
| CFGBSY | Programming or erase configuration busy. |