4.12.5.5 Interrupts

An OTPC interrupt request can be triggered when one or several of the following bits are set in the OTPC Interrupt Status register (OTPC_ISR): End Of Programming (EOP), End Of Locking (EOL), End Of Invalidation (EOI), End Of Key Transfer (EOKT), Programming Error (PGERR), Locking Error (LKERR), Invalidation Error (IVERR), Write Error (WERR), End Of Read (EOR), End Of Flush (EOF), End Of Hide (EOH), End Of Refresh (EORF), Checksum Check Error (CKERR) or Key Invalid Error (KBERR).

The interrupt request is generated if the corresponding bit in the OTPC Interrupt Mask register (OTPC_IMR) is set. Bits in OTPC_IMR are set by writing a ‘1’ to the corresponding bit in the OTPC Interrupt Enable register (OTPC_IER) and cleared by writing a ‘1’ to the corresponding bit in the OTPC Interrupt Disable register (OTPC_IDR). The interrupt request remains active until the corresponding bit in OTPC_ISR is cleared.

Reading the OTPC_ISR clears all bits of the register.