| 摘要 |
PURPOSE:To prevent misprocessing, by inhibiting data reading, if a microprocessor receives no control signal. CONSTITUTION:When a preample detection circuit detects a preample signal PRE, a detection signal is given from a line (d) to an interruption signal controlling circuit 10. When the circuit 10 receives this detection signal, an output of an interruption signal generating counter 5 transmitted from a line (a) is made effective, and the interruption signal from a line (h) is transmitted to a microprocessor 8, which sequentially reads and processes a word synchronizing signal WS and control information. When this process is finished, a completion signal is given from the processor 8 to a line (i). Thus, the circuit 10 inhibits an output signal from the counter 5 from giving on the line (h). |
