SYNCHRONOUS CIRCUIT

摘要

PURPOSE: To synchronize plural transmission/reception devices and to integrate plural CODEC on a single integrated circuit by separating reception/transmission pulses with frame synchronizing separation pulses. CONSTITUTION: The frame synchronizing separation pulses FSEP are supplied from a line 314 to a synchronizing unit 306 and received synchronizing pulses FSR0-FSR3 delayed by the connection time of FSEP are generated for corresponding transmission synchronizing pulses by using a system clock signal inputted form a line 321. The received synchronizing pulses FSR0-FSR3 are transmitted to respective CODEC 302-305 at prescribed delayed time from corresponding transmitted synchronizing pulses FST0-FST3. Thus, three integrated circuit terminals are saved and four CODEC can be stored in a standard package by generating four received pulses from FSEP.