Chapter 4 Port Integration Module (S12XDP512PIMV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor 243
4.3.2.53 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 logic level “1” to the corresponding bit in the
PIFH register. Writing a “0” has no effect.
0x0267
76543210
R
PIFH7 PIFH6 PIFH5 PIFH4 PIFH3 PIFH2 PIFH1 PIFH0
W
Reset 00000000
Figure 4-55. Port H Interrupt Flag Register (PIFH)
Table 4-50. PIFH Field Descriptions
Field Description
7–0
PIFH[7:0]
Interrupt Flags Port H
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 logic level “1” clears the associated flag.