MC3S12RG128 Datasheet, PDF (102/546 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 2 Port Integration Module (PIM3RG128V1) Block Description
2.3.2.6.8 Port H Interrupt Flag Register (PIFH)
Module Base + 0x_0027
R
W
Reset
7
PIFH7
0
6
PIFH6
0
5
PIFH5
0
4
PIFH4
0
3
PIFH3
0
2
PIFH2
0
1
PIFH1
0
0
PIFH0
0
Figure 2-39. Port H Interrupt Flag Register (PIFH)
Read: Anytime.
Write: Anytime.
Each flag is set by an active edge on the associated input pin. This could be a rising or a falling edge based
on the state of the PPSH register. To clear this flag, write “1” to the corresponding bit in the PIFH register.
Writing a “0” has no effect.
Table 2-34. PIFH Field Descriptions
Field
Description
7–0
PIFH[7:0]
Interrupt Flags Port H Bits
0 No active edge pending. Writing a “0” has no effect.
1 Active edge on the associated bit has occurred (an interrupt will occur if the associated enable bit is set).
Writing a “1” clears the associated flag.
MC3S12RG128 Data Sheet, Rev. 1.05
102
Freescale Semiconductor