Patent attributes
An integrated circuit apparatus may include: a plurality of power domains to which power voltage is separately supplied; a plurality of circuit macros belonging to a plurality of the power domains respectively; a plurality of power switches to conduct or to substantially block power coming from a power circuit and going to the plurality power domains, respectively; and a power-controlling unit including a controller to control the plurality of power switches, a power domain register to store power domain data which corresponds to a plurality of external interrupt signals that are indicative of power domains that are to be activated; and an interrupt handler to respond to the external interrupt signals by delivering the power domain data corresponding to the external interrupt signals to the controller, the controller being operable to turn on/off the power switches corresponding to the power domain data, respectively.
