NXP Semiconductors MWCT101 S Series, Reference Manual

Page: 177 / 1761

10.6.6 Interrupt Status Flag Register (PORTx_ISFR)
The pin interrupt configuration is valid in all digital pin muxing modes. The Interrupt
Status Flag for each pin is also visible in the corresponding Pin Control Register, and
each flag can be cleared in either location.
Address: Base a A0h offset
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
ISF
W
w1c
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PORTx_ISFR field descriptions
Field Description
ISF Interrupt Status Flag
Each bit in the field indicates the detection of the configured interrupt of the same number as the field.
0 Configured interrupt is not detected.
1 Configured interrupt is detected. If the pin is configured to generate a DMA request, then the
corresponding flag will be cleared automatically at the completion of the requested DMA transfer.
Otherwise, the flag remains set until a logic 1 is written to the flag. If the pin is configured for a level
sensitive interrupt and the pin remains asserted, then the flag is set again immediately after it is
cleared.
10.6.7 Digital Filter Enable Register (PORTx_DFER)
The digital filter configuration is valid in all digital pin muxing modes.
Address: Base a C0h offset
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
DFE
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PORTx_DFER field descriptions
Field Description
DFE Digital Filter Enable
The digital filter configuration is valid in all digital pin muxing modes. The output of each digital filter is
reset to zero at system reset and whenever the digital filter is disabled. Each bit in the field enables the
digital filter of the same number as the field.
Chapter 10 Port Control and Interrupts (PORT)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors 177