FLOPPY DISK DRIVE INTERFACE CIRCUIT

摘要

The floppy disc drive interface circuit comprises a floppy disc drive and a voltage frequency oscillator outputting a read data signal and a window signal based on a read data pulse generated by the floppy disc drive. The fundamental frequency signal from a generator and the window signal from the voltage frequency oscillator are received and a pulse width of the window signal is measured. A mode signal is output representing a set data transfer rate of the read data signal. A window gate signal is generated based on a measurement value of the window signal from the pulse width measurer and a data transfer rate represented by the mode signal from the mode signal output.