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Chapter 3 Interrupts
External Interrupts
Figure 3-3-6 Both Edges Interrupt Control Register (EDGDT : x'03F8F', R/W)
■Both Edges Interrupt Control Register (EDGDT)
The both edges interrupt control register (EDGDT) selects interrupt edges of IRQ0 to IRQ4. Interrupts are
generated at both edges, or at single edge. The external interrupt control register (IRQ0ICR to IRQ4ICR)
specifies whether interrupts are generated.
01
24
567
3
( At reset - - 0 0 0 0 0 0 )
EDGDT
EDGSEL0EDGSEL1EDGSEL2EDGSEL3EDGSEL4Reserved
--
0
1
Programmable active edge
IRQ0 Both edges interrupt
selection
Both edges interrupt
EDGSEL0
0
1
Programmable active edge
IRQ1 Both edges interrupt
selection
Both edges interrupt
EDGSEL1
0
1
Programmable active edge
IRQ2 Both edges interrupt
selection
Both edges interrupt
EDGSEL2
0
1
Programmable active edge
IRQ3 Both edges interrupt
selection
Both edges interrupt
EDGSEL3
0
1
Programmable active edge
IRQ4 Both edges interrupt
selection
Both edges interrupt
EDGSEL4
Set always to "0"
Reserved