
6. Interrupt controller
MC97F6108A User’s manual
48
6.1
External interrupt
External interrupts on EINT0, EINT1 and EINT2 pins receive various interrupt requests depending on
the external interrupt edge register (EIEDGE) and external interrupt polarity (EIPOLA).
Each external interrupt source has enable/disable bits.
External interrupt flag register (EIFLAG) indicates the status of external interrupts.
EIBOTH, EIEDGE, EIPOLA
EINT0 Pin
EINT1 Pin
EIFLAG0
EIFLAG1
EINT0 Interrupt
EINT1 Interrupt
[0xA5] External Interrupt Edge Register
[0xA6] External Interrupt Polarity Register
[0xA7] External Interrupt Both Edge Enable Register
3
3
3
EINT2 Pin
EIFLAG2
EINT2 Interrupt
EA & IE.2
EA & IE.1
EA & IE.0
Figure 12. External Interrupt Description