
3886 Group User’s Manual
APPLICATION
2-23
2.2 Interrupt
(3)
Change of relevant register settings
When the setting of the following registers or bits is changed, the interrupt request bit may be set
to “1”.
Interrupt edge selection register (address 3A16)
Interrupt source selection register (address 3916)
INT2, INT3, INT4 interrupt switch bit of port control register 2 (bit 4 of address 2F16)
Set the above listed registers or bits as the following sequence.
Clear an interrupt enable bit to “0” (interrupt disabled)
↓
Set the above listed registers or bits
↓
Clear an interrupt request bit to “0”
(no interrupt request issued)
↓
Set the interrupt enable bit to “1” (interrupt enabled)
Fig. 2.2.19 Sequence of changing relevant register