21.5.15.2.2 Interrupt Freeze

Setting PIO_IOFRx.FINT freezes the following fields (configured in PIO_CFGRx) of the I/O lines if the corresponding MSKx bit is set in PIO_MSKRx:

• IFEN: Input Filter Enable
• IFSCEN: Input Filter Slow Clock Enable
• EVTSEL: Event Selection

For Privileged-Access mode I/O lines, use PIO_P_IOFRx.FINT and the PIO_P_MSKRx to freeze the fields above.

When the “Interrupt Freeze” is currently active on an I/O line, the ICFS flag is set when reading the PIO_CFGRx of the I/O line if the corresponding line is configured in User-Access mode or the PIO_P_CFGRx if the I/O line access is configured in Privileged-Acces mode .

Only a hardware reset can release fields listed above.