Information
PORTx_GPCHR field descriptions
Field Description
31–16
GPWE
Global Pin Write Enable
Selects which Pin Control Registers (31 through 16) bits [15:0] update with the value in GPWD. If a
selected Pin Control Register is locked then the write to that register is ignored.
0 Corresponding Pin Control Register is not updated with the value in GPWD.
1 Corresponding Pin Control Register is updated with the value in GPWD.
15–0
GPWD
Global Pin Write Data
Write value that is written to all Pin Control Registers bits [15:0] that are selected by GPWE.
11.4.4 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.
Addresses: PORTA_ISFR is 4004_9000h base + A0h offset = 4004_90A0h
PORTB_ISFR is 4004_A000h base + A0h offset = 4004_A0A0h
PORTC_ISFR is 4004_B000h base + A0h offset = 4004_B0A0h
PORTD_ISFR is 4004_C000h base + A0h offset = 4004_C0A0h
PORTE_ISFR is 4004_D000h base + A0h offset = 4004_D0A0h
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
31–0
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 one 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.
Chapter 11 Port control and interrupts (PORT)
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 215