DATA TRANSFER SYSTEM

PURPOSE:To secure a data transfer speed reducing the amount of hardware of an interface part, by providing a channel system device with a timing pulse generation part which generates timing pulses for reading an optional output of a signal distributor. CONSTITUTION:When new data is set in a signal distributor SD, a channel system device SPS reads transfer data. In this case, the 15th bit is assigned for a synchronizing signal. This synchronizing signal is inputted to a synchronizing signal generation part SYG through a signal receiver REC. When the output of the REC is applied to the SYG, a level detector DET detects the on-to-off fall or off-to-on rise of the synchronizing signal and a timing circuit TIM counts a time from the start of the signal. Then, a pulse generator PG generates the synchronizing signal a prescribed time later, and a timing signal for synchronization is supplied to a register REG to fetch transfer data.