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13.3 External Interrupt (INT0 to 2)
The external interrupt (INT0 to 2) has 3 inputs.
■ Feature of External Interrupt (INT0 to 2)
• Each interrupt is independent vector.
• Usable for returning from standby.
■ Block Diagram of External Interrupt (INT0 to 2)
Figure 13.3-1 Block diagram of external interrupt (INT0 to 2)
■ Register List of External Interrupt (INT0 to 2)
Figure 13.3-2 Register list of external interrupt (INT0 to 2)
INT2
INT1
IF3 IF2 IF1 Test
INT2E INT1E INT0E Test I2CLR I1CLR I0CLR Test
INT0
IRQ04
SR
R
EIF
EIE
Internal Bus
IRQ03
IRQ02
clr
enable
70bit
EIE
EIF
External Interupt Enable
R
External Interupt Request
000098
HAddress:
000099
H