The present invention relates to a semiconductor storage device capable of
performing seamless input/output of data when an interrupt is inserted
during a burst operation. A plurality of segment arrays activated
independently from each other are provided. Each segment array includes a
plurality of unit arrays activated independently from each other. Each
segment array is provided with prefetch latch circuits for latching burst
read data and preload latch circuits for latching burst write data. When
an interrupt occurs during a burst operation of a a first unit array in a
first segment array, a second unit array in a second activated segment
array initiates a burst operation.
