6. Interrupt controller MC97F6108A User’s manual
EIPOLA (External Interrupt Flag Polarity Register) : A6H
According to EIEDGE, this register acts differently. If EIEDGE is level
type, external interrupt polarity have level value. If EIEDGE is edge type,
external interrupt polarity have edge value.
Determine the polarity of External Interrupt 2
When High level or rising edge, Interrupt occurs(default)
When Low level or falling edge, Interrupt occurs
Determine the polarity of External Interrupt 1
When High level or rising edge, Interrupt occurs(default)
When Low level or falling edge, Interrupt occurs
Determine the polarity of External Interrupt 0
When High level or rising edge, Interrupt occurs(default)
When Low level or falling edge, Interrupt occurs
EIBOTH (External Interrupt Flag Both Edge Enable Register) : A7H
If BOTHx is written to ‘1’, the corresponding external pin interrupt is
enabled by both edges(no level).
And EIEDGE and EIPOLA register value are ignored.
Determine the type of External Interrupt 2
Both edge detection Disable (default)
Both edge detection Enable
Determine the type of External Interrupt 1
Both edge detection Disable (default)
Both edge detection Enable
Determine the type of External Interrupt 0
Both edge detection Disable (default)
Both edge detection Enable