A data processing system includes a general-purpose data processing unit (PU) including an instruction issuing unit that fetches and decodes an instruction in a program and issues the instruction and an execution unit that executes general-purpose processing according to a general-purpose instruction in the program; a special-purpose data processing unit (VU), including a data path unit for special-purpose data processing, that executes special-purpose data processing according to a special-purpose instruction in the program; and a first clock supply unit for stopping, based on a wait signal that is issued by the VU and shows that the PU is waiting for processing of the VU, a first clock signal for a part of the PU.