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ABOV Semiconductor Co., Ltd.
EIFLAG3 (External Interrupt Flag 3 Register): BDH
Initial value :00H
When an External Interrupt A-E is occurred, the flag becomes ‘1’.The flag is cleared
only by writing ‘0’ to the bit. So, the flag should be cleared by software. Writing “1”
has no effect.
External Interrupt A ~ E not occurred
External Interrupt A ~ E occurred
EIPOL3H (External Interrupt Polarity 3 High Register): C7H
Initial value: 00H
External interrupt (EINTE) polarity selection
Interrupt on falling edge
Interrupt on both of rising and falling edge
EIPOL3L (External Interrupt Polarity 3 Low Register): C6H
Initial value: 00H
External interrupt (EINTA, EINTB, EINTC, EINTD) polarity selection
Interrupt on falling edge
Interrupt on both of rising and falling edge