
PORTx_PCRn field descriptions
Field
Description
31–25
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
24
ISF
Interrupt Status Flag
The pin interrupt configuration is valid in all digital pin muxing modes.
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.
23–20
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
19–16
IRQC
Interrupt Configuration
The pin interrupt configuration is valid in all digital pin muxing modes. The corresponding pin is configured
to generate interrupt/DMA request as follows:
0000
Interrupt Status Flag (ISF) is disabled.
0001
ISF flag and DMA request on rising edge.
0010
ISF flag and DMA request on falling edge.
0011
ISF flag and DMA request on either edge.
0100
Reserved.
0101
Reserved.
0110
Reserved.
0111
Reserved.
1000
ISF flag and Interrupt when logic 0.
1001
ISF flag and Interrupt on rising-edge.
1010
ISF flag and Interrupt on falling-edge.
1011
ISF flag and Interrupt on either edge.
1100
ISF flag and Interrupt when logic 1.
1101
Reserved.
1110
Reserved.
1111
Reserved.
15
LK
Lock Register
0
Pin Control Register fields [15:0] are not locked.
1
Pin Control Register fields [15:0] are locked and cannot be updated until the next system reset.
14–11
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
10–8
MUX
Pin Mux Control
Not all pins support all pin muxing slots. Unimplemented pin muxing slots are reserved and may result in
configuring the pin for a different pin muxing slot.
The corresponding pin is configured in the following pin muxing slot as follows:
000
Pin disabled (Alternative 0) (analog).
001
Alternative 1 (GPIO).
010
Alternative 2 (chip-specific).
Table continues on the next page...
Chapter 10 Port Control and Interrupts (PORT)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors
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