Chapter 4 Port Integration Module (S12XDP512PIMV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
210 Freescale Semiconductor
Table 4-18. IRQCR Field Descriptions
Field Description
7
IRQE
IRQ Select Edge Sensitive Only
Special modes: Read or write anytime.
Normal and emulation modes: Read anytime, write once.
0
IRQ configured for low level recognition.
1
IRQ configured to respond only to falling edges. Falling edges on the IRQ pin will be detected anytime
IRQE = 1 and will be cleared only upon a reset or the servicing of the
IRQ interrupt.
6
IRQEN
External IRQ Enable
Read or write anytime.
0 External
IRQ pin is disconnected from interrupt logic.
1 External
IRQ pin is connected to interrupt logic.