| 摘要 |
A disk controller IC ( 11 ), driven by a first supply voltage (V 1 ), is provided with a push-pull type output circuit having an output terminal (P 1 ). The output circuit may be turned ON/OFF by a control signal. On the other hand, disk driver IC ( 12 ) is provided with a first voltage and a series of a pull-up resistor (R 1 ) and a diode (D 3 ) connected in series between an input terminal and the first supply voltage. An interface is established for the ICs ( 11, 12 ) by connecting the output terminal (P 1 ) and the input terminal (P 2 ) together.
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