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3822_03 Datasheet, PDF (97/328 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER | |||
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APPLICATION
2.2 Interrupts
2.2.6 Notes on use
When using interrupts, note the following.
(1) Register setting
sFix bit 7 of the interrupt control register 2 (address 003F16) to â0.â Nothing is allocated for this bit,
however, do not write â1â to it.
sWhen using I/O ports P42, P43, P50 and P51 as input ports, put the INT interrupts corresponding to
each port into the disabled state.
sWhen the active edges of the following interrupts are switched, the corresponding interrupt request
bit may be set to â1.â To avoid accepting an interrupt request, we recommend the register setting
example shown in Figure 2.2.17.
qINT0 interrupt to INT3 interrupt
qCNTR0 interrupt and CNTR1 interrupt
 Set the corresponding interrupt enable bit to â0â
 Set the interrupt active edge
 Set the corresponding interrupt request bit to â0â
 Set the corresponding interrupt enable bit to â1â
Fig. 2.2.17 Register setting example
3822 GROUP USERâS MANUAL
2â31
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