METHOD AND DEVICE FOR PREPROCESSING I/O SIGNAL OF DIFFERENT INTERFACES IN COMMON-FORMAT CENTRAL PROCESSOR BY USING COMMON CLOCK OF SYSTEM

摘要

PURPOSE: A method and a device for preprocessing I/O(Input/Output) signals of different interfaces in a common-format central processor by using a common clock of a system are provided to easily preprocess the common clock for the I/O signals of the different interfaces and expand a common clock operating range. CONSTITUTION: Multiple audio data inputs through a GPI(general Purpose Input) block are inputted a channel decoder unit(11) one by one, and a type of a data bit per input bit is determined. Bit stream format signals are inputted to a stream unit(13) independent to an interface type. The stream unit outputs inputted serial data bits to a FIFO(First Input First Output, 14) by using a mid-storage of a register. The FIFO transfers an output signal to a bus(SB) through a bus interface(15).