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10.13 Interrupt Register Description
The interrupt register is used for controlling interrupt functions. Also it has external interrupt control registers. The
interrupt register consists of interrupt enable register (IE), interrupt enable register 1 (IE1), interrupt enable register 2
(IE2) and interrupt enable register 3 (IE3). For external interrupt, it consists of external interrupt flag 0/1/2/3/4
register(EIFLAGx), external interrupt polarity 0/2/3/4 high/low register (EIPOLxH/L), interrupt polarity 1
register(EIPOL1).