Chapter 3 InterruptsIII - 42 External Interrupts3-3-3 Control RegistersThe external interrupt input signal, which operated in each external interrupt 0 to 4 interface generateinterrupt requests.External interrupt 0 to 4 interface are controlled by the external interrupt control register (IRQnICR) and theboth edges interrupt control register (EDGDT). And external interrupt interface 0 to 1 are controlled by thenoise filter control register (NFCTR0), external interrupt interface 2 to 4 are controlled by the noise filtercontrol register (NFCTR1), and external interrupt interface 4 is controlled the port 6 key interrupt controlregister (P6IMD).Table 3-3-2 shows the list of registers, control external interrupt 0 to 4.Table 3-3-2 External Interrupt Control RegisterR/W : Readable / Writable.External Interrupt Register Address R/W Function PageIRQ0ICR x'03FE2' R/W External interrupt 0 control register III -17EDGDT x'03F8F' R/W Both edges interrupt control register III -49NFCTR0 x'03F8E' R/W Noise filter control register 0 III -47IRQ1ICR x'03FE3' R/W External interrupt 1 control register III -18EDGDT x'03F8F' R/W Both edges interrupt control register III -49NFCTR0 x'03F8E' R/W Noise filter control register 0 III -47IRQ2ICR x'03FE4' R/W External interrupt 2 control register III -19EDGDT x'03F8F' R/W Both edges interrupt control register III -49NFCTR1 x'03F8D' R/W Noise filter control register 1 III -48IRQ3ICR x'03FE5' R/W External interrupt 3 control register III -20EDGDT x'03F8F' R/W Both edges interrupt control register III -49NFCTR1 x'03F8D' R/W Noise filter control register 1 III -48IRQ4ICR x'03FE6' R/W External interrupt 4 control register III -21EDGDT x'03F8F' R/W Both edges interrupt control register III -49P6IMD x'03F3E' R/W Port 6 key interrupt control register III -50NFCTR1 x'03F8D' R/W Noise filter control register 1 III -48External interrupt 4External interrupt 0External interrupt 1External interrupt 2External interrupt 3
