CONTROL PROCESSING SYSTEM

PURPOSE:To execute easily a processing even in case the processing quantity has exceeded the capacity of one central processor, by sending out a synchronizing signal from a main central processor by the first bit of data which is required for a sub-central processor. CONSTITUTION:When the time for transmitting the data from a main equipment 1 to a telephone set 2 comes, a central processor M.CPU 101 of the equipment 1 sends out in series data containing display data, and applies that simultaneously to a receiving terminal (b) and (d) of a main central processor T.CPU 201 and a sub-central processor L.CPU 202 of the telephone set 2. When the number of bits of the data which is to be read by the T.CPU 201 reaches, for instance, 24 bits, read of the data is stopped, and when the data of the 25th bit has been applied to the terminal (b), a synchronizing pulse is outputted to an output terminal (c). The synchronizing pulse which has been outputted to the terminal (c) is inputted to a synchronizing clock terminal (e) of the L.CPU 202, by which the L.CPU 202 reads the data which has been applied to the terminal (d) at that time.