SOLID STATE STORAGE SYSTEM CAPABLE OF PARALLEL PROCESSING

A semiconductor storage system in which the parallel processing is possible is provided to operate a plurality of memory chips at the same time in response to a read or write command by sharing command buses and address buses of the memory chips. A multi-driving part(300) comprises a memory area(350) and a write controller(360) to drive the first to fourth memory chips(351-354) at the same time according to an external command signal by the memory area which shares a control command signal and an address signal. The memory area comprises the first to fourth memory chips. Each memory chip comprises a page or sector which is the writing unit. The write controller provides the first to fourth write control signals in response to the address signal, a write signal, an individual selection signal and a sector count.