REALTIME CONNECTION METHOD BETWEEN CPU AND SERIAL INTERFACE DEVICE

摘要

PURPOSE: A real time connection method between a CPU and a serial interface device is provided to compensate a difference of an access time between a CPU and a serial interface device by using a wait signal of a CPU. CONSTITUTION: A real time connection method between a CPU and a serial interface device comprises the steps of: receiving an address of a serial interface device, a read signal, and a write signal from a CPU and data of the serial interface device(S10); transferring a wait signal to the CPU(S20); generating a header and storing the header at a buffer(S30); transmitting a chip enable signal(S40) and transmitting the header according to the address by using a coding and decoding filter(CODEC filter)(S50); transmitting the data to the CPU or the serial interface device; and releasing the wait signal when the data is completely transmitted.