Chapter 4 Port Integration Module (S12XDP512PIMV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
236 Freescale Semiconductor
4.3.2.45 Port P Interrupt Flag Register (PIFP)
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 PPSP register. To clear this flag, write logic level “1” to the corresponding bit in the
PIFP register. Writing a “0” has no effect.
0x025F
76543210
R
PIFP7 PIFP6 PIFP5 PIFP4 PIFP3 PIFP2 PIFP1 PIFP0
W
Reset 00000000
Figure 4-47. Port P Interrupt Flag Register (PIFP)
Table 4-44. PIFP Field Descriptions
Field Description
7–0
PIFP[7:0]
Interrupt Flags Port P
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.